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					64c2076bfc | 
							
								
								
									
										101
									
								
								.gitignore
									
									
									
									
										vendored
									
									
								
							
							
						
						
									
										101
									
								
								.gitignore
									
									
									
									
										vendored
									
									
								
							@@ -1,68 +1,45 @@
 | 
			
		||||
*.a
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		||||
.config
 | 
			
		||||
.version
 | 
			
		||||
*.o
 | 
			
		||||
*.d
 | 
			
		||||
*.def
 | 
			
		||||
*.dll
 | 
			
		||||
*.dylib
 | 
			
		||||
*.exe
 | 
			
		||||
*.exp
 | 
			
		||||
*.h.c
 | 
			
		||||
*.ilk
 | 
			
		||||
*.lib
 | 
			
		||||
*.pc
 | 
			
		||||
*.pdb
 | 
			
		||||
*.so
 | 
			
		||||
*.so.*
 | 
			
		||||
*.ver
 | 
			
		||||
*.ho
 | 
			
		||||
*-example
 | 
			
		||||
*-test
 | 
			
		||||
*_g
 | 
			
		||||
/.config
 | 
			
		||||
/.version
 | 
			
		||||
/ffmpeg
 | 
			
		||||
/ffplay
 | 
			
		||||
/ffprobe
 | 
			
		||||
/ffserver
 | 
			
		||||
/config.*
 | 
			
		||||
/version.h
 | 
			
		||||
/doc/*.1
 | 
			
		||||
/doc/*.3
 | 
			
		||||
/doc/*.html
 | 
			
		||||
/doc/*.pod
 | 
			
		||||
/doc/avoptions_codec.texi
 | 
			
		||||
/doc/avoptions_format.texi
 | 
			
		||||
/doc/examples/decoding_encoding
 | 
			
		||||
/doc/examples/demuxing
 | 
			
		||||
/doc/examples/filtering_audio
 | 
			
		||||
/doc/examples/filtering_video
 | 
			
		||||
/doc/examples/metadata
 | 
			
		||||
/doc/examples/muxing
 | 
			
		||||
/doc/examples/resampling_audio
 | 
			
		||||
/doc/examples/scaling_video
 | 
			
		||||
/doc/fate.txt
 | 
			
		||||
/doc/doxy/html/
 | 
			
		||||
/doc/print_options
 | 
			
		||||
/libavcodec/*_tablegen
 | 
			
		||||
/libavcodec/*_tables.c
 | 
			
		||||
/libavcodec/*_tables.h
 | 
			
		||||
/libavutil/avconfig.h
 | 
			
		||||
/tests/audiogen
 | 
			
		||||
/tests/base64
 | 
			
		||||
/tests/data/
 | 
			
		||||
/tests/rotozoom
 | 
			
		||||
/tests/tiny_psnr
 | 
			
		||||
/tests/videogen
 | 
			
		||||
/tests/vsynth1/
 | 
			
		||||
/tools/aviocat
 | 
			
		||||
/tools/ffbisect
 | 
			
		||||
/tools/bisect.need
 | 
			
		||||
/tools/cws2fws
 | 
			
		||||
/tools/fourcc2pixfmt
 | 
			
		||||
/tools/ffescape
 | 
			
		||||
/tools/ffeval
 | 
			
		||||
/tools/graph2dot
 | 
			
		||||
/tools/ismindex
 | 
			
		||||
/tools/pktdumper
 | 
			
		||||
/tools/probetest
 | 
			
		||||
/tools/qt-faststart
 | 
			
		||||
/tools/trasher
 | 
			
		||||
config.*
 | 
			
		||||
doc/*.1
 | 
			
		||||
doc/*.html
 | 
			
		||||
doc/*.pod
 | 
			
		||||
doxy
 | 
			
		||||
ffmpeg
 | 
			
		||||
ffplay
 | 
			
		||||
ffprobe
 | 
			
		||||
ffserver
 | 
			
		||||
libavcodec/libavcodec*
 | 
			
		||||
libavcore/libavcore*
 | 
			
		||||
libavdevice/libavdevice*
 | 
			
		||||
libavfilter/libavfilter*
 | 
			
		||||
libavformat/libavformat*
 | 
			
		||||
libavutil/avconfig.h
 | 
			
		||||
libavutil/libavutil*
 | 
			
		||||
libpostproc/libpostproc*
 | 
			
		||||
libswscale/libswscale*
 | 
			
		||||
tests/audiogen
 | 
			
		||||
tests/base64
 | 
			
		||||
tests/data
 | 
			
		||||
tests/rotozoom
 | 
			
		||||
tests/seek_test
 | 
			
		||||
tests/tiny_psnr
 | 
			
		||||
tests/videogen
 | 
			
		||||
tests/vsynth1
 | 
			
		||||
tests/vsynth2
 | 
			
		||||
tools/cws2fws
 | 
			
		||||
tools/graph2dot
 | 
			
		||||
tools/lavfi-showfiltfmts
 | 
			
		||||
tools/pktdumper
 | 
			
		||||
tools/probetest
 | 
			
		||||
tools/qt-faststart
 | 
			
		||||
tools/trasher
 | 
			
		||||
tools/trasher*.d
 | 
			
		||||
version.h
 | 
			
		||||
 
 | 
			
		||||
@@ -500,3 +500,5 @@ necessary.  Here is a sample; alter the names:
 | 
			
		||||
  Ty Coon, President of Vice
 | 
			
		||||
 | 
			
		||||
That's all there is to it!
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 
 | 
			
		||||
							
								
								
									
										6
									
								
								CREDITS
									
									
									
									
									
								
							
							
						
						
									
										6
									
								
								CREDITS
									
									
									
									
									
								
							@@ -1,7 +1,5 @@
 | 
			
		||||
This file contains the names of some of the people who have contributed to
 | 
			
		||||
FFmpeg. The names are sorted alphabetically by last name.  As this file is
 | 
			
		||||
currently quite outdated and git serves as a much better tool for determining
 | 
			
		||||
authorship, it remains here for historical reasons only.
 | 
			
		||||
This file contains the name of the people who have contributed to
 | 
			
		||||
FFmpeg. The names are sorted alphabetically by last name.
 | 
			
		||||
 | 
			
		||||
Dénes Balatoni
 | 
			
		||||
Michel Bardiaux
 | 
			
		||||
 
 | 
			
		||||
							
								
								
									
										741
									
								
								Changelog
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										741
									
								
								Changelog
									
									
									
									
									
										Normal file
									
								
							@@ -0,0 +1,741 @@
 | 
			
		||||
Entries are sorted chronologically from oldest to youngest within each release,
 | 
			
		||||
releases are sorted from youngest to oldest.
 | 
			
		||||
 | 
			
		||||
version 0.6.6:
 | 
			
		||||
- id3v2: fix skipping extended header in id3v2.4
 | 
			
		||||
- nsvdec: Fix use of uninitialized streams
 | 
			
		||||
- nsvdec: Be more careful with av_malloc()
 | 
			
		||||
- nsvdec: Propagate errors
 | 
			
		||||
- dv: check stype
 | 
			
		||||
- dv: Fix null pointer dereference due to ach=0
 | 
			
		||||
- dv: Fix small stack overread related to CVE-2011-3929 and CVE-2011-3936.
 | 
			
		||||
- atrac3: Fix crash in tonal component decoding
 | 
			
		||||
- mjpegbdec: Fix overflow in SOS
 | 
			
		||||
- kgv1dec: Increase offsets array size so it is large enough
 | 
			
		||||
- motionpixels: decode only the 111 complete frames for fate
 | 
			
		||||
- motionpixels: Clip YUV values after applying a gradient
 | 
			
		||||
- celp filters: Do not read earlier than the start of the 'out' vector
 | 
			
		||||
- vqavideo: return error if image size is not a multiple of block size (CVE-2012-0947)
 | 
			
		||||
- dpcm: ignore extra unpaired bytes in stereo streams (CVE-2011-3951)
 | 
			
		||||
- aacsbr: prevent out of bounds memcpy() (CVE-2012-0850)
 | 
			
		||||
- h264: Add check for invalid chroma_format_idc (CVE-2012-0851)
 | 
			
		||||
- adpcm: ADPCM Electronic Arts has always two channels (CVE-2012-0852)
 | 
			
		||||
- shorten: remove VLA and check for buffer overflow
 | 
			
		||||
- shorten: Prevent block size from increasing
 | 
			
		||||
- shorten: Fix out of bound writes in fix_bitshift()
 | 
			
		||||
- shorten: check for realloc failure (CVE-2012-0858)
 | 
			
		||||
- shorten: Use separate pointers for the allocated memory for decoded samples (CVE-2012-0858)
 | 
			
		||||
- kmvc: Check palsize (CVE-2011-3952)
 | 
			
		||||
- qdm2: clip array indices returned by qdm2_get_vlc()
 | 
			
		||||
- configure: properly check for mingw-w64 through installed headers
 | 
			
		||||
- mingw32: properly check if vfw capture is supported by the system headers
 | 
			
		||||
- mingw32: merge checks for mingw-w64 and mingw32-runtime >= 3.15 into one
 | 
			
		||||
- dxva2: define required feature selection macros
 | 
			
		||||
- png: check bit depth for PAL8/Y400A pixel formats
 | 
			
		||||
- ea: check chunk_size for validity
 | 
			
		||||
- tqi: Pass errors from the MB decoder
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.6.5:
 | 
			
		||||
- vorbis: An additional defense in the Vorbis codec. (CVE-2011-3895)
 | 
			
		||||
- vorbisdec: Fix decoding bug with channel handling.
 | 
			
		||||
- matroskadec: Fix a bug where a pointer was cached to an array that might
 | 
			
		||||
  later move due to a realloc(). (CVE-2011-3893)
 | 
			
		||||
- vorbis: Avoid some out-of-bounds reads. (CVE-2011-3893)
 | 
			
		||||
- vp3: fix oob read for negative tokens and memleaks on error, (CVE-2011-3892)
 | 
			
		||||
- vp3: fix streams with non-zero last coefficient.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.6.4:
 | 
			
		||||
- 4xm: Add a check in decode_i_frame to prevent buffer overreads
 | 
			
		||||
- wma: initialize prev_block_len_bits, next_block_len_bits, and block_len_bits.
 | 
			
		||||
- swscale: #include "libavutil/mathematics.h"
 | 
			
		||||
- vp3dec: Check coefficient index in vp3_dequant() (CVE-2011-4352)
 | 
			
		||||
- svq1dec: call avcodec_set_dimensions() after dimensions changed. (CVE-2011-4579)
 | 
			
		||||
- commits related to CVE-2011-4353:
 | 
			
		||||
  - vp6: Fix illegal read.
 | 
			
		||||
  - vp6: Reset the internal state when aborting key frames header parsing
 | 
			
		||||
  - vp6: Check for huffman tree build errors
 | 
			
		||||
  - vp6: partially propagate huffman tree building errors during coeff model parsing and fix misspelling
 | 
			
		||||
- commits related to CVE-2011-4351:
 | 
			
		||||
  - qdm2: check output buffer size before decoding
 | 
			
		||||
  - Fix qdm2 decoder packet handling to match the api
 | 
			
		||||
  - Fix out of bound reads in the QDM2 decoder.
 | 
			
		||||
  - Check for out of bound writes in the QDM2 decoder.
 | 
			
		||||
- vmd: fix segfaults on corruped streams (CVE-2011-4364)
 | 
			
		||||
- rv34: Check for invalid slice offsets
 | 
			
		||||
- rv34: Fix potential overreads
 | 
			
		||||
- rv34: Avoid NULL dereference on corrupted bitstream
 | 
			
		||||
- rv10: Reject slices that does not have the same type as the first one
 | 
			
		||||
- oggdec: fix out of bound write in the ogg demuxer
 | 
			
		||||
- smacker: fix a few off by 1 errors
 | 
			
		||||
- Check for invalid VLC value in smacker decoder.
 | 
			
		||||
- Check and propagate errors when VLC trees cannot be built in smacker decoder.
 | 
			
		||||
- Fixed off by one packet size allocation in the smacker demuxer.
 | 
			
		||||
- Check for invalid packet size in the smacker demuxer.
 | 
			
		||||
- ape demuxer: fix segfault on memory allocation failure.
 | 
			
		||||
- Fixed size given to init_get_bits() in xan decoder.
 | 
			
		||||
- smacker demuxer: handle possible av_realloc() failure.
 | 
			
		||||
- Fixed segfault with wavpack decoder on corrupted decorrelation terms sub-blocks.
 | 
			
		||||
- indeo2: fail if input buffer too small
 | 
			
		||||
- indeo2: init_get_bits size in bits instead of bytes
 | 
			
		||||
- wavpack: Check error codes rather than working around error conditions.
 | 
			
		||||
- Fixed invalid writes and reads in wavpack decoder on corrupted bitstreams.
 | 
			
		||||
- cpu detection: avoid a signed overflow
 | 
			
		||||
- h264: correct implicit weight table computation for long ref pics
 | 
			
		||||
- h264: correct the check for invalid long term frame index in MMCO decode
 | 
			
		||||
- rv10/20: tell decoder to use edge emulation
 | 
			
		||||
- flvenc: use int64_t to store offsets
 | 
			
		||||
- VC-1: fix reading of custom PAR.
 | 
			
		||||
- h264: notice memory allocation failure
 | 
			
		||||
- libx264: do not set pic quality if no frame is output
 | 
			
		||||
- mxfdec: Include FF_INPUT_BUFFER_PADDING_SIZE when allocating extradata.
 | 
			
		||||
- rv30: return AVERROR(EINVAL) instead of EINVAL
 | 
			
		||||
- Do not decode RV30 files if the extradata is too small
 | 
			
		||||
- aacps: skip some memcpy() if src and dst would be equal
 | 
			
		||||
- mpegts: fix Continuity Counter error detection
 | 
			
		||||
- alsa: fallback to buffer_size/4 for period_size.
 | 
			
		||||
- mxfenc: fix ignored drop flag in binary timecode representation.
 | 
			
		||||
- dca: set AVCodecContext frame_size for DTS audio
 | 
			
		||||
- H.264: fix overreads of qscale_table
 | 
			
		||||
- postprocess.c: filter name needs to be double 0 terminated
 | 
			
		||||
- Replace strncpy() with av_strlcpy() in libpostproc.
 | 
			
		||||
- jpegdec: actually search for and parse RSTn
 | 
			
		||||
- riff: Add mpgv MPEG-2 fourcc
 | 
			
		||||
- Added M701 codec_tag for mpeg2video
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.6.3:
 | 
			
		||||
 | 
			
		||||
- fix compilation with --enable-hardcoded-tables
 | 
			
		||||
- mjpeg: Detect overreads in mjpeg_decode_scan() and error out.
 | 
			
		||||
- aac: add headers needed for log2f()
 | 
			
		||||
- lavf: inspect more frames for fps when container time base is coarse
 | 
			
		||||
- AMV: disable DR1 and don't override EMU_EDGE
 | 
			
		||||
  (addresses http://seclists.org/bugtraq/2011/Apr/257)
 | 
			
		||||
- Fix memory (re)allocation in matroskadec.c (MSVR11-011/CVE-2011-3504)
 | 
			
		||||
- Fix some crashes with invalid bitstreams in the CAVS decoder
 | 
			
		||||
  (CVE-2011-3362, CVE-2011-3973, CVE-2011-3974)
 | 
			
		||||
- Compilation fixes for gcc-4.6, testsuite now passes again
 | 
			
		||||
- Fix a heap corruption issue in the OGG decoder
 | 
			
		||||
- Backported the Android VisualOn AAC encoder wrapper from 0.7.2
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.6.3:
 | 
			
		||||
 | 
			
		||||
- AMV: Fix possibly exploitable crash.
 | 
			
		||||
- Fix apparently exploitable race condition.
 | 
			
		||||
  (addresses http://seclists.org/bugtraq/2011/Apr/257)
 | 
			
		||||
 | 
			
		||||
version 0.6.2:
 | 
			
		||||
 | 
			
		||||
- fix compilation with --enable-hardcoded-tables
 | 
			
		||||
- Fix invalid reads in VC-1 decoding (related to CVE-2011-0723)
 | 
			
		||||
- Do not attempt to decode APE file with no frames
 | 
			
		||||
  (adresses http://packetstorm.linuxsecurity.com/1103-exploits/vlc105-dos.txt)
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.6.1:
 | 
			
		||||
 | 
			
		||||
- fix autodetection of E-AC-3 substream samples
 | 
			
		||||
- performance fix for seekable HTTP
 | 
			
		||||
- backport AAC-HE v2 from trunk
 | 
			
		||||
- add missing VP80 fourcc code for the VP8 codec
 | 
			
		||||
- small documentation fixes
 | 
			
		||||
- fix several potentially exploitable issues in the FLIC decoder
 | 
			
		||||
  (addresses CVE-2010-3429)
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.6:
 | 
			
		||||
 | 
			
		||||
- PB-frame decoding for H.263
 | 
			
		||||
- deprecated vhook subsystem removed
 | 
			
		||||
- deprecated old scaler removed
 | 
			
		||||
- VQF demuxer
 | 
			
		||||
- alpha channel scaler
 | 
			
		||||
- PCX encoder
 | 
			
		||||
- RTP packetization of H.263
 | 
			
		||||
- RTP packetization of AMR
 | 
			
		||||
- RTP depacketization of Vorbis
 | 
			
		||||
- CorePNG decoding support
 | 
			
		||||
- Cook multichannel decoding support
 | 
			
		||||
- introduced avlanguage helpers in libavformat
 | 
			
		||||
- 8088flex TMV demuxer and decoder
 | 
			
		||||
- per-stream language-tags extraction in asfdec
 | 
			
		||||
- V210 decoder and encoder
 | 
			
		||||
- remaining GPL parts in AC-3 decoder converted to LGPL
 | 
			
		||||
- QCP demuxer
 | 
			
		||||
- SoX native format muxer and demuxer
 | 
			
		||||
- AMR-NB decoding/encoding, AMR-WB decoding via OpenCORE libraries
 | 
			
		||||
- DPX image decoder
 | 
			
		||||
- Electronic Arts Madcow decoder
 | 
			
		||||
- DivX (XSUB) subtitle encoder
 | 
			
		||||
- nonfree libamr support for AMR-NB/WB decoding/encoding removed
 | 
			
		||||
- experimental AAC encoder
 | 
			
		||||
- RTP depacketization of ASF and RTSP from WMS servers
 | 
			
		||||
- RTMP support in libavformat
 | 
			
		||||
- noX handling for OPT_BOOL X options
 | 
			
		||||
- Wave64 demuxer
 | 
			
		||||
- IEC-61937 compatible Muxer
 | 
			
		||||
- TwinVQ decoder
 | 
			
		||||
- Bluray (PGS) subtitle decoder
 | 
			
		||||
- LPCM support in MPEG-TS (HDMV RID as found on Blu-ray disks)
 | 
			
		||||
- WMA Pro decoder
 | 
			
		||||
- Core Audio Format demuxer
 | 
			
		||||
- Atrac1 decoder
 | 
			
		||||
- MD STUDIO audio demuxer
 | 
			
		||||
- RF64 support in WAV demuxer
 | 
			
		||||
- MPEG-4 Audio Lossless Coding (ALS) decoder
 | 
			
		||||
- -formats option split into -formats, -codecs, -bsfs, and -protocols
 | 
			
		||||
- IV8 demuxer
 | 
			
		||||
- CDG demuxer and decoder
 | 
			
		||||
- R210 decoder
 | 
			
		||||
- Auravision Aura 1 and 2 decoders
 | 
			
		||||
- Deluxe Paint Animation playback system
 | 
			
		||||
- SIPR decoder
 | 
			
		||||
- Adobe Filmstrip muxer and demuxer
 | 
			
		||||
- RTP depacketization of H.263
 | 
			
		||||
- Bink demuxer and audio/video decoders
 | 
			
		||||
- enable symbol versioning by default for linkers that support it
 | 
			
		||||
- IFF PBM/ILBM bitmap decoder
 | 
			
		||||
- concat protocol
 | 
			
		||||
- Indeo 5 decoder
 | 
			
		||||
- RTP depacketization of AMR
 | 
			
		||||
- WMA Voice decoder
 | 
			
		||||
- ffprobe tool
 | 
			
		||||
- AMR-NB decoder
 | 
			
		||||
- RTSP muxer
 | 
			
		||||
- HE-AAC v1 decoder
 | 
			
		||||
- Kega Game Video (KGV1) decoder
 | 
			
		||||
- VorbisComment writing for FLAC, Ogg FLAC and Ogg Speex files
 | 
			
		||||
- RTP depacketization of Theora
 | 
			
		||||
- HTTP Digest authentication
 | 
			
		||||
- RTMP/RTMPT/RTMPS/RTMPE/RTMPTE protocol support via librtmp
 | 
			
		||||
- Psygnosis YOP demuxer and video decoder
 | 
			
		||||
- spectral extension support in the E-AC-3 decoder
 | 
			
		||||
- unsharp video filter
 | 
			
		||||
- RTP hinting in the mov/3gp/mp4 muxer
 | 
			
		||||
- Dirac in Ogg demuxing
 | 
			
		||||
- seek to keyframes in Ogg
 | 
			
		||||
- 4:2:2 and 4:4:4 Theora decoding
 | 
			
		||||
- 35% faster VP3/Theora decoding
 | 
			
		||||
- faster AAC decoding
 | 
			
		||||
- faster H.264 decoding
 | 
			
		||||
- WebM support in Matroska de/muxer
 | 
			
		||||
- low overhead Ogg muxing
 | 
			
		||||
- VP8 de/encoding via libvpx
 | 
			
		||||
- CODEC_CAP_EXPERIMENTAL added
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.5:
 | 
			
		||||
 | 
			
		||||
- DV50 AKA DVCPRO50 encoder, decoder, muxer and demuxer
 | 
			
		||||
- TechSmith Camtasia (TSCC) video decoder
 | 
			
		||||
- IBM Ultimotion (ULTI) video decoder
 | 
			
		||||
- Sierra Online audio file demuxer and decoder
 | 
			
		||||
- Apple QuickDraw (qdrw) video decoder
 | 
			
		||||
- Creative ADPCM audio decoder (16 bits as well as 8 bits schemes)
 | 
			
		||||
- Electronic Arts Multimedia (WVE/UV2/etc.) file demuxer
 | 
			
		||||
- Miro VideoXL (VIXL) video decoder
 | 
			
		||||
- H.261 video encoder
 | 
			
		||||
- QPEG video decoder
 | 
			
		||||
- Nullsoft Video (NSV) file demuxer
 | 
			
		||||
- Shorten audio decoder
 | 
			
		||||
- LOCO video decoder
 | 
			
		||||
- Apple Lossless Audio Codec (ALAC) decoder
 | 
			
		||||
- Winnov WNV1 video decoder
 | 
			
		||||
- Autodesk Animator Studio Codec (AASC) decoder
 | 
			
		||||
- Indeo 2 video decoder
 | 
			
		||||
- Fraps FPS1 video decoder
 | 
			
		||||
- Snow video encoder/decoder
 | 
			
		||||
- Sonic audio encoder/decoder
 | 
			
		||||
- Vorbis audio decoder
 | 
			
		||||
- Macromedia ADPCM decoder
 | 
			
		||||
- Duck TrueMotion 2 video decoder
 | 
			
		||||
- support for decoding FLX and DTA extensions in FLIC files
 | 
			
		||||
- H.264 custom quantization matrices support
 | 
			
		||||
- ffserver fixed, it should now be usable again
 | 
			
		||||
- QDM2 audio decoder
 | 
			
		||||
- Real Cooker audio decoder
 | 
			
		||||
- TrueSpeech audio decoder
 | 
			
		||||
- WMA2 audio decoder fixed, now all files should play correctly
 | 
			
		||||
- RealAudio 14.4 and 28.8 decoders fixed
 | 
			
		||||
- JPEG-LS decoder
 | 
			
		||||
- build system improvements
 | 
			
		||||
- tabs and trailing whitespace removed from the codebase
 | 
			
		||||
- CamStudio video decoder
 | 
			
		||||
- AIFF/AIFF-C audio format, encoding and decoding
 | 
			
		||||
- ADTS AAC file reading and writing
 | 
			
		||||
- Creative VOC file reading and writing
 | 
			
		||||
- American Laser Games multimedia (*.mm) playback system
 | 
			
		||||
- Zip Motion Blocks Video decoder
 | 
			
		||||
- improved Theora/VP3 decoder
 | 
			
		||||
- True Audio (TTA) decoder
 | 
			
		||||
- AVS demuxer and video decoder
 | 
			
		||||
- JPEG-LS encoder
 | 
			
		||||
- Smacker demuxer and decoder
 | 
			
		||||
- NuppelVideo/MythTV demuxer and RTjpeg decoder
 | 
			
		||||
- KMVC decoder
 | 
			
		||||
- MPEG-2 intra VLC support
 | 
			
		||||
- MPEG-2 4:2:2 encoder
 | 
			
		||||
- Flash Screen Video decoder
 | 
			
		||||
- GXF demuxer
 | 
			
		||||
- Chinese AVS decoder
 | 
			
		||||
- GXF muxer
 | 
			
		||||
- MXF demuxer
 | 
			
		||||
- VC-1/WMV3/WMV9 video decoder
 | 
			
		||||
- MacIntel support
 | 
			
		||||
- AVISynth support
 | 
			
		||||
- VMware video decoder
 | 
			
		||||
- VP5 video decoder
 | 
			
		||||
- VP6 video decoder
 | 
			
		||||
- WavPack lossless audio decoder
 | 
			
		||||
- Targa (.TGA) picture decoder
 | 
			
		||||
- Vorbis audio encoder
 | 
			
		||||
- Delphine Software .cin demuxer/audio and video decoder
 | 
			
		||||
- Tiertex .seq demuxer/video decoder
 | 
			
		||||
- MTV demuxer
 | 
			
		||||
- TIFF picture encoder and decoder
 | 
			
		||||
- GIF picture decoder
 | 
			
		||||
- Intel Music Coder decoder
 | 
			
		||||
- Zip Motion Blocks Video encoder
 | 
			
		||||
- Musepack decoder
 | 
			
		||||
- Flash Screen Video encoder
 | 
			
		||||
- Theora encoding via libtheora
 | 
			
		||||
- BMP encoder
 | 
			
		||||
- WMA encoder
 | 
			
		||||
- GSM-MS encoder and decoder
 | 
			
		||||
- DCA decoder
 | 
			
		||||
- DXA demuxer and decoder
 | 
			
		||||
- DNxHD decoder
 | 
			
		||||
- Gamecube movie (.THP) playback system
 | 
			
		||||
- Blackfin optimizations
 | 
			
		||||
- Interplay C93 demuxer and video decoder
 | 
			
		||||
- Bethsoft VID demuxer and video decoder
 | 
			
		||||
- CRYO APC demuxer
 | 
			
		||||
- Atrac3 decoder
 | 
			
		||||
- V.Flash PTX decoder
 | 
			
		||||
- RoQ muxer, RoQ audio encoder
 | 
			
		||||
- Renderware TXD demuxer and decoder
 | 
			
		||||
- extern C declarations for C++ removed from headers
 | 
			
		||||
- sws_flags command line option
 | 
			
		||||
- codebook generator
 | 
			
		||||
- RoQ video encoder
 | 
			
		||||
- QTRLE encoder
 | 
			
		||||
- OS/2 support removed and restored again
 | 
			
		||||
- AC-3 decoder
 | 
			
		||||
- NUT muxer
 | 
			
		||||
- additional SPARC (VIS) optimizations
 | 
			
		||||
- Matroska muxer
 | 
			
		||||
- slice-based parallel H.264 decoding
 | 
			
		||||
- Monkey's Audio demuxer and decoder
 | 
			
		||||
- AMV audio and video decoder
 | 
			
		||||
- DNxHD encoder
 | 
			
		||||
- H.264 PAFF decoding
 | 
			
		||||
- Nellymoser ASAO decoder
 | 
			
		||||
- Beam Software SIFF demuxer and decoder
 | 
			
		||||
- libvorbis Vorbis decoding removed in favor of native decoder
 | 
			
		||||
- IntraX8 (J-Frame) subdecoder for WMV2 and VC-1
 | 
			
		||||
- Ogg (Theora, Vorbis and FLAC) muxer
 | 
			
		||||
- The "device" muxers and demuxers are now in a new libavdevice library
 | 
			
		||||
- PC Paintbrush PCX decoder
 | 
			
		||||
- Sun Rasterfile decoder
 | 
			
		||||
- TechnoTrend PVA demuxer
 | 
			
		||||
- Linux Media Labs MPEG-4 (LMLM4) demuxer
 | 
			
		||||
- AVM2 (Flash 9) SWF muxer
 | 
			
		||||
- QT variant of IMA ADPCM encoder
 | 
			
		||||
- VFW grabber
 | 
			
		||||
- iPod/iPhone compatible mp4 muxer
 | 
			
		||||
- Mimic decoder
 | 
			
		||||
- MSN TCP Webcam stream demuxer
 | 
			
		||||
- RL2 demuxer / decoder
 | 
			
		||||
- IFF demuxer
 | 
			
		||||
- 8SVX audio decoder
 | 
			
		||||
- non-recursive Makefiles
 | 
			
		||||
- BFI demuxer
 | 
			
		||||
- MAXIS EA XA (.xa) demuxer / decoder
 | 
			
		||||
- BFI video decoder
 | 
			
		||||
- OMA demuxer
 | 
			
		||||
- MLP/TrueHD decoder
 | 
			
		||||
- Electronic Arts CMV decoder
 | 
			
		||||
- Motion Pixels Video decoder
 | 
			
		||||
- Motion Pixels MVI demuxer
 | 
			
		||||
- removed animated GIF decoder/demuxer
 | 
			
		||||
- D-Cinema audio muxer
 | 
			
		||||
- Electronic Arts TGV decoder
 | 
			
		||||
- Apple Lossless Audio Codec (ALAC) encoder
 | 
			
		||||
- AAC decoder
 | 
			
		||||
- floating point PCM encoder/decoder
 | 
			
		||||
- MXF muxer
 | 
			
		||||
- DV100 AKA DVCPRO HD decoder and demuxer
 | 
			
		||||
- E-AC-3 support added to AC-3 decoder
 | 
			
		||||
- Nellymoser ASAO encoder
 | 
			
		||||
- ASS and SSA demuxer and muxer
 | 
			
		||||
- liba52 wrapper removed
 | 
			
		||||
- SVQ3 watermark decoding support
 | 
			
		||||
- Speex decoding via libspeex
 | 
			
		||||
- Electronic Arts TGQ decoder
 | 
			
		||||
- RV40 decoder
 | 
			
		||||
- QCELP / PureVoice decoder
 | 
			
		||||
- RV30 decoder
 | 
			
		||||
- hybrid WavPack support
 | 
			
		||||
- R3D REDCODE demuxer
 | 
			
		||||
- ALSA support for playback and record
 | 
			
		||||
- Electronic Arts TQI decoder
 | 
			
		||||
- OpenJPEG based JPEG 2000 decoder
 | 
			
		||||
- NC (NC4600) camera file demuxer
 | 
			
		||||
- Gopher client support
 | 
			
		||||
- MXF D-10 muxer
 | 
			
		||||
- generic metadata API
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.4.9-pre1:
 | 
			
		||||
 | 
			
		||||
- DV encoder, DV muxer
 | 
			
		||||
- Microsoft RLE video decoder
 | 
			
		||||
- Microsoft Video-1 decoder
 | 
			
		||||
- Apple Animation (RLE) decoder
 | 
			
		||||
- Apple Graphics (SMC) decoder
 | 
			
		||||
- Apple Video (RPZA) decoder
 | 
			
		||||
- Cinepak decoder
 | 
			
		||||
- Sega FILM (CPK) file demuxer
 | 
			
		||||
- Westwood multimedia support (VQA & AUD files)
 | 
			
		||||
- Id Quake II CIN playback support
 | 
			
		||||
- 8BPS video decoder
 | 
			
		||||
- FLIC playback support
 | 
			
		||||
- RealVideo 2.0 (RV20) decoder
 | 
			
		||||
- Duck TrueMotion v1 (DUCK) video decoder
 | 
			
		||||
- Sierra VMD demuxer and video decoder
 | 
			
		||||
- MSZH and ZLIB decoder support
 | 
			
		||||
- SVQ1 video encoder
 | 
			
		||||
- AMR-WB support
 | 
			
		||||
- PPC optimizations
 | 
			
		||||
- rate distortion optimal cbp support
 | 
			
		||||
- rate distorted optimal ac prediction for MPEG-4
 | 
			
		||||
- rate distorted optimal lambda->qp support
 | 
			
		||||
- AAC encoding with libfaac
 | 
			
		||||
- Sunplus JPEG codec (SP5X) support
 | 
			
		||||
- use Lagrange multipler instead of QP for ratecontrol
 | 
			
		||||
- Theora/VP3 decoding support
 | 
			
		||||
- XA and ADX ADPCM codecs
 | 
			
		||||
- export MPEG-2 active display area / pan scan
 | 
			
		||||
- Add support for configuring with IBM XLC
 | 
			
		||||
- floating point AAN DCT
 | 
			
		||||
- initial support for zygo video (not complete)
 | 
			
		||||
- RGB ffv1 support
 | 
			
		||||
- new audio/video parser API
 | 
			
		||||
- av_log() system
 | 
			
		||||
- av_read_frame() and av_seek_frame() support
 | 
			
		||||
- missing last frame fixes
 | 
			
		||||
- seek by mouse in ffplay
 | 
			
		||||
- noise reduction of DCT coefficients
 | 
			
		||||
- H.263 OBMC & 4MV support
 | 
			
		||||
- H.263 alternative inter vlc support
 | 
			
		||||
- H.263 loop filter
 | 
			
		||||
- H.263 slice structured mode
 | 
			
		||||
- interlaced DCT support for MPEG-2 encoding
 | 
			
		||||
- stuffing to stay above min_bitrate
 | 
			
		||||
- MB type & QP visualization
 | 
			
		||||
- frame stepping for ffplay
 | 
			
		||||
- interlaced motion estimation
 | 
			
		||||
- alternate scantable support
 | 
			
		||||
- SVCD scan offset support
 | 
			
		||||
- closed GOP support
 | 
			
		||||
- SSE2 FDCT
 | 
			
		||||
- quantizer noise shaping
 | 
			
		||||
- G.726 ADPCM audio codec
 | 
			
		||||
- MS ADPCM encoding
 | 
			
		||||
- multithreaded/SMP motion estimation
 | 
			
		||||
- multithreaded/SMP encoding for MPEG-1/MPEG-2/MPEG-4/H.263
 | 
			
		||||
- multithreaded/SMP decoding for MPEG-2
 | 
			
		||||
- FLAC decoder
 | 
			
		||||
- Metrowerks CodeWarrior suppport
 | 
			
		||||
- H.263+ custom pcf support
 | 
			
		||||
- nicer output for 'ffmpeg -formats'
 | 
			
		||||
- Matroska demuxer
 | 
			
		||||
- SGI image format, encoding and decoding
 | 
			
		||||
- H.264 loop filter support
 | 
			
		||||
- H.264 CABAC support
 | 
			
		||||
- nicer looking arrows for the motion vector visualization
 | 
			
		||||
- improved VCD support
 | 
			
		||||
- audio timestamp drift compensation
 | 
			
		||||
- MPEG-2 YUV 422/444 support
 | 
			
		||||
- polyphase kaiser windowed sinc and blackman nuttall windowed sinc audio resample
 | 
			
		||||
- better image scaling
 | 
			
		||||
- H.261 support
 | 
			
		||||
- correctly interleave packets during encoding
 | 
			
		||||
- VIS optimized motion compensation
 | 
			
		||||
- intra_dc_precision>0 encoding support
 | 
			
		||||
- support reuse of motion vectors/MB types/field select values of the source video
 | 
			
		||||
- more accurate deblock filter
 | 
			
		||||
- padding support
 | 
			
		||||
- many optimizations and bugfixes
 | 
			
		||||
- FunCom ISS audio file demuxer and according ADPCM decoding
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.4.8:
 | 
			
		||||
 | 
			
		||||
- MPEG-2 video encoding (Michael)
 | 
			
		||||
- Id RoQ playback subsystem (Mike Melanson and Tim Ferguson)
 | 
			
		||||
- Wing Commander III Movie (.mve) file playback subsystem (Mike Melanson
 | 
			
		||||
  and Mario Brito)
 | 
			
		||||
- Xan DPCM audio decoder (Mario Brito)
 | 
			
		||||
- Interplay MVE playback subsystem (Mike Melanson)
 | 
			
		||||
- Duck DK3 and DK4 ADPCM audio decoders (Mike Melanson)
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.4.7:
 | 
			
		||||
 | 
			
		||||
- RealAudio 1.0 (14_4) and 2.0 (28_8) native decoders. Author unknown, code from mplayerhq
 | 
			
		||||
  (originally from public domain player for Amiga at http://www.honeypot.net/audio)
 | 
			
		||||
- current version now also compiles with older GCC (Fabrice)
 | 
			
		||||
- 4X multimedia playback system including 4xm file demuxer (Mike
 | 
			
		||||
  Melanson), and 4X video and audio codecs (Michael)
 | 
			
		||||
- Creative YUV (CYUV) decoder (Mike Melanson)
 | 
			
		||||
- FFV1 codec (our very simple lossless intra only codec, compresses much better
 | 
			
		||||
  than HuffYUV) (Michael)
 | 
			
		||||
- ASV1 (Asus), H.264, Intel indeo3 codecs have been added (various)
 | 
			
		||||
- tiny PNG encoder and decoder, tiny GIF decoder, PAM decoder (PPM with
 | 
			
		||||
  alpha support), JPEG YUV colorspace support. (Fabrice Bellard)
 | 
			
		||||
- ffplay has been replaced with a newer version which uses SDL (optionally)
 | 
			
		||||
  for multiplatform support (Fabrice)
 | 
			
		||||
- Sorenson Version 3 codec (SVQ3) support has been added (decoding only) - donated
 | 
			
		||||
  by anonymous
 | 
			
		||||
- AMR format has been added (Johannes Carlsson)
 | 
			
		||||
- 3GP support has been added (Johannes Carlsson)
 | 
			
		||||
- VP3 codec has been added (Mike Melanson)
 | 
			
		||||
- more MPEG-1/2 fixes
 | 
			
		||||
- better multiplatform support, MS Visual Studio fixes (various)
 | 
			
		||||
- AltiVec optimizations (Magnus Damn and others)
 | 
			
		||||
- SH4 processor support has been added (BERO)
 | 
			
		||||
- new public interfaces (avcodec_get_pix_fmt) (Roman Shaposhnick)
 | 
			
		||||
- VOB streaming support (Brian Foley)
 | 
			
		||||
- better MP3 autodetection (Andriy Rysin)
 | 
			
		||||
- qpel encoding (Michael)
 | 
			
		||||
- 4mv+b frames encoding finally fixed (Michael)
 | 
			
		||||
- chroma ME (Michael)
 | 
			
		||||
- 5 comparison functions for ME (Michael)
 | 
			
		||||
- B-frame encoding speedup (Michael)
 | 
			
		||||
- WMV2 codec (unfinished - Michael)
 | 
			
		||||
- user specified diamond size for EPZS (Michael)
 | 
			
		||||
- Playstation STR playback subsystem, still experimental (Mike and Michael)
 | 
			
		||||
- ASV2 codec (Michael)
 | 
			
		||||
- CLJR decoder (Alex)
 | 
			
		||||
 | 
			
		||||
.. And lots more new enhancements and fixes.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.4.6:
 | 
			
		||||
 | 
			
		||||
- completely new integer only MPEG audio layer 1/2/3 decoder rewritten
 | 
			
		||||
  from scratch
 | 
			
		||||
- Recoded DCT and motion vector search with gcc (no longer depends on nasm)
 | 
			
		||||
- fix quantization bug in AC3 encoder
 | 
			
		||||
- added PCM codecs and format. Corrected WAV/AVI/ASF PCM issues
 | 
			
		||||
- added prototype ffplay program
 | 
			
		||||
- added GOB header parsing on H.263/H.263+ decoder (Juanjo)
 | 
			
		||||
- bug fix on MCBPC tables of H.263 (Juanjo)
 | 
			
		||||
- bug fix on DC coefficients of H.263 (Juanjo)
 | 
			
		||||
- added Advanced Prediction Mode on H.263/H.263+ decoder (Juanjo)
 | 
			
		||||
- now we can decode H.263 streams found in QuickTime files (Juanjo)
 | 
			
		||||
- now we can decode H.263 streams found in VIVO v1 files(Juanjo)
 | 
			
		||||
- preliminary RTP "friendly" mode for H.263/H.263+ coding. (Juanjo)
 | 
			
		||||
- added GOB header for H.263/H.263+ coding on RTP mode (Juanjo)
 | 
			
		||||
- now H.263 picture size is returned on the first decoded frame (Juanjo)
 | 
			
		||||
- added first regression tests
 | 
			
		||||
- added MPEG-2 TS demuxer
 | 
			
		||||
- new demux API for libav
 | 
			
		||||
- more accurate and faster IDCT (Michael)
 | 
			
		||||
- faster and entropy-controlled motion search (Michael)
 | 
			
		||||
- two pass video encoding (Michael)
 | 
			
		||||
- new video rate control (Michael)
 | 
			
		||||
- added MSMPEG4V1, MSMPEGV2 and WMV1 support (Michael)
 | 
			
		||||
- great performance improvement of video encoders and decoders (Michael)
 | 
			
		||||
- new and faster bit readers and vlc parsers (Michael)
 | 
			
		||||
- high quality encoding mode: tries all macroblock/VLC types (Michael)
 | 
			
		||||
- added DV video decoder
 | 
			
		||||
- preliminary RTP/RTSP support in ffserver and libavformat
 | 
			
		||||
- H.263+ AIC decoding/encoding support (Juanjo)
 | 
			
		||||
- VCD MPEG-PS mode (Juanjo)
 | 
			
		||||
- PSNR stuff (Juanjo)
 | 
			
		||||
- simple stats output (Juanjo)
 | 
			
		||||
- 16-bit and 15-bit RGB/BGR/GBR support (Bisqwit)
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.4.5:
 | 
			
		||||
 | 
			
		||||
- some header fixes (Zdenek Kabelac <kabi at informatics.muni.cz>)
 | 
			
		||||
- many MMX optimizations (Nick Kurshev <nickols_k at mail.ru>)
 | 
			
		||||
- added configure system (actually a small shell script)
 | 
			
		||||
- added MPEG audio layer 1/2/3 decoding using LGPL'ed mpglib by
 | 
			
		||||
  Michael Hipp (temporary solution - waiting for integer only
 | 
			
		||||
  decoder)
 | 
			
		||||
- fixed VIDIOCSYNC interrupt
 | 
			
		||||
- added Intel H.263 decoding support ('I263' AVI fourCC)
 | 
			
		||||
- added Real Video 1.0 decoding (needs further testing)
 | 
			
		||||
- simplified image formats again. Added PGM format (=grey
 | 
			
		||||
  pgm). Renamed old PGM to PGMYUV.
 | 
			
		||||
- fixed msmpeg4 slice issues (tell me if you still find problems)
 | 
			
		||||
- fixed OpenDivX bugs with newer versions (added VOL header decoding)
 | 
			
		||||
- added support for MPlayer interface
 | 
			
		||||
- added macroblock skip optimization
 | 
			
		||||
- added MJPEG decoder
 | 
			
		||||
- added mmx/mmxext IDCT from libmpeg2
 | 
			
		||||
- added pgmyuvpipe, ppm, and ppm_pipe formats (original patch by Celer
 | 
			
		||||
  <celer at shell.scrypt.net>)
 | 
			
		||||
- added pixel format conversion layer (e.g. for MJPEG or PPM)
 | 
			
		||||
- added deinterlacing option
 | 
			
		||||
- MPEG-1/2 fixes
 | 
			
		||||
- MPEG-4 vol header fixes (Jonathan Marsden <snmjbm at pacbell.net>)
 | 
			
		||||
- ARM optimizations (Lionel Ulmer <lionel.ulmer at free.fr>).
 | 
			
		||||
- Windows porting of file converter
 | 
			
		||||
- added MJPEG raw format (input/ouput)
 | 
			
		||||
- added JPEG image format support (input/output)
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.4.4:
 | 
			
		||||
 | 
			
		||||
- fixed some std header definitions (Bjorn Lindgren
 | 
			
		||||
  <bjorn.e.lindgren at telia.com>).
 | 
			
		||||
- added MPEG demuxer (MPEG-1 and 2 compatible).
 | 
			
		||||
- added ASF demuxer
 | 
			
		||||
- added prototype RM demuxer
 | 
			
		||||
- added AC3 decoding (done with libac3 by Aaron Holtzman)
 | 
			
		||||
- added decoding codec parameter guessing (.e.g. for MPEG, because the
 | 
			
		||||
  header does not include them)
 | 
			
		||||
- fixed header generation in MPEG-1, AVI and ASF muxer: wmplayer can now
 | 
			
		||||
  play them (only tested video)
 | 
			
		||||
- fixed H.263 white bug
 | 
			
		||||
- fixed phase rounding in img resample filter
 | 
			
		||||
- add MMX code for polyphase img resample filter
 | 
			
		||||
- added CPU autodetection
 | 
			
		||||
- added generic title/author/copyright/comment string handling (ASF and RM
 | 
			
		||||
  use them)
 | 
			
		||||
- added SWF demux to extract MP3 track (not usable yet because no MP3
 | 
			
		||||
  decoder)
 | 
			
		||||
- added fractional frame rate support
 | 
			
		||||
- codecs are no longer searched by read_header() (should fix ffserver
 | 
			
		||||
  segfault)
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.4.3:
 | 
			
		||||
 | 
			
		||||
- BGR24 patch (initial patch by Jeroen Vreeken <pe1rxq at amsat.org>)
 | 
			
		||||
- fixed raw yuv output
 | 
			
		||||
- added motion rounding support in MPEG-4
 | 
			
		||||
- fixed motion bug rounding in MSMPEG4
 | 
			
		||||
- added B-frame handling in video core
 | 
			
		||||
- added full MPEG-1 decoding support
 | 
			
		||||
- added partial (frame only) MPEG-2 support
 | 
			
		||||
- changed the FOURCC code for H.263 to "U263" to be able to see the
 | 
			
		||||
  +AVI/H.263 file with the UB Video H.263+ decoder. MPlayer works with
 | 
			
		||||
  this +codec ;) (JuanJo).
 | 
			
		||||
- Halfpel motion estimation after MB type selection (JuanJo)
 | 
			
		||||
- added pgm and .Y.U.V output format
 | 
			
		||||
- suppressed 'img:' protocol. Simply use: /tmp/test%d.[pgm|Y] as input or
 | 
			
		||||
  output.
 | 
			
		||||
- added pgmpipe I/O format (original patch from Martin Aumueller
 | 
			
		||||
  <lists at reserv.at>, but changed completely since we use a format
 | 
			
		||||
  instead of a protocol)
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.4.2:
 | 
			
		||||
 | 
			
		||||
- added H.263/MPEG-4/MSMPEG4 decoding support. MPEG-4 decoding support
 | 
			
		||||
  (for OpenDivX) is almost complete: 8x8 MVs and rounding are
 | 
			
		||||
  missing. MSMPEG4 support is complete.
 | 
			
		||||
- added prototype MPEG-1 decoder. Only I- and P-frames handled yet (it
 | 
			
		||||
  can decode ffmpeg MPEGs :-)).
 | 
			
		||||
- added libavcodec API documentation (see apiexample.c).
 | 
			
		||||
- fixed image polyphase bug (the bottom of some images could be
 | 
			
		||||
  greenish)
 | 
			
		||||
- added support for non clipped motion vectors (decoding only)
 | 
			
		||||
  and image sizes non-multiple of 16
 | 
			
		||||
- added support for AC prediction (decoding only)
 | 
			
		||||
- added file overwrite confirmation (can be disabled with -y)
 | 
			
		||||
- added custom size picture to H.263 using H.263+ (Juanjo)
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.4.1:
 | 
			
		||||
 | 
			
		||||
- added MSMPEG4 (aka DivX) compatible encoder. Changed default codec
 | 
			
		||||
  of AVI and ASF to DIV3.
 | 
			
		||||
- added -me option to set motion estimation method
 | 
			
		||||
  (default=log). suppressed redundant -hq option.
 | 
			
		||||
- added options -acodec and -vcodec to force a given codec (useful for
 | 
			
		||||
  AVI for example)
 | 
			
		||||
- fixed -an option
 | 
			
		||||
- improved dct_quantize speed
 | 
			
		||||
- factorized some motion estimation code
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.4.0:
 | 
			
		||||
 | 
			
		||||
- removing grab code from ffserver and moved it to ffmpeg. Added
 | 
			
		||||
  multistream support to ffmpeg.
 | 
			
		||||
- added timeshifting support for live feeds (option ?date=xxx in the
 | 
			
		||||
  URL)
 | 
			
		||||
- added high quality image resize code with polyphase filter (need
 | 
			
		||||
  mmx/see optimization). Enable multiple image size support in ffserver.
 | 
			
		||||
- added multi live feed support in ffserver
 | 
			
		||||
- suppressed master feature from ffserver (it should be done with an
 | 
			
		||||
  external program which opens the .ffm url and writes it to another
 | 
			
		||||
  ffserver)
 | 
			
		||||
- added preliminary support for video stream parsing (WAV and AVI half
 | 
			
		||||
  done). Added proper support for audio/video file conversion in
 | 
			
		||||
  ffmpeg.
 | 
			
		||||
- added preliminary support for video file sending from ffserver
 | 
			
		||||
- redesigning I/O subsystem: now using URL based input and output
 | 
			
		||||
  (see avio.h)
 | 
			
		||||
- added WAV format support
 | 
			
		||||
- added "tty user interface" to ffmpeg to stop grabbing gracefully
 | 
			
		||||
- added MMX/SSE optimizations to SAD (Sums of Absolutes Differences)
 | 
			
		||||
  (Juan J. Sierralta P. a.k.a. "Juanjo" <juanjo at atmlab.utfsm.cl>)
 | 
			
		||||
- added MMX DCT from mpeg2_movie 1.5 (Juanjo)
 | 
			
		||||
- added new motion estimation algorithms, log and phods (Juanjo)
 | 
			
		||||
- changed directories: libav for format handling, libavcodec for
 | 
			
		||||
  codecs
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.3.4:
 | 
			
		||||
 | 
			
		||||
- added stereo in MPEG audio encoder
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.3.3:
 | 
			
		||||
 | 
			
		||||
- added 'high quality' mode which use motion vectors. It can be used in
 | 
			
		||||
  real time at low resolution.
 | 
			
		||||
- fixed rounding problems which caused quality problems at high
 | 
			
		||||
  bitrates and large GOP size
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.3.2: small fixes
 | 
			
		||||
 | 
			
		||||
- ASF fixes
 | 
			
		||||
- put_seek bug fix
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.3.1: added avi/divx support
 | 
			
		||||
 | 
			
		||||
- added AVI support
 | 
			
		||||
- added MPEG-4 codec compatible with OpenDivX. It is based on the H.263 codec
 | 
			
		||||
- added sound for flash format (not tested)
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
version 0.3: initial public release
 | 
			
		||||
										
											
												File diff suppressed because it is too large
												Load Diff
											
										
									
								
							
							
								
								
									
										4
									
								
								INSTALL
									
									
									
									
									
								
							
							
						
						
									
										4
									
								
								INSTALL
									
									
									
									
									
								
							@@ -9,7 +9,3 @@ path when launching 'configure', e.g. '/ffmpegdir/ffmpeg/configure'.
 | 
			
		||||
2) Then type 'make' to build FFmpeg. GNU Make 3.81 or later is required.
 | 
			
		||||
 | 
			
		||||
3) Type 'make install' to install all binaries and libraries you built.
 | 
			
		||||
 | 
			
		||||
NOTICE
 | 
			
		||||
 | 
			
		||||
 - Non system dependencies (e.g. libx264, libvpx) are disabled by default.
 | 
			
		||||
 
 | 
			
		||||
							
								
								
									
										77
									
								
								LICENSE
									
									
									
									
									
								
							
							
						
						
									
										77
									
								
								LICENSE
									
									
									
									
									
								
							@@ -1,4 +1,5 @@
 | 
			
		||||
FFmpeg:
 | 
			
		||||
-------
 | 
			
		||||
 | 
			
		||||
Most files in FFmpeg are under the GNU Lesser General Public License version 2.1
 | 
			
		||||
or later (LGPL v2.1+). Read the file COPYING.LGPLv2.1 for details. Some other
 | 
			
		||||
@@ -13,44 +14,18 @@ configure to activate them. In this case, FFmpeg's license changes to GPL v2+.
 | 
			
		||||
Specifically, the GPL parts of FFmpeg are
 | 
			
		||||
 | 
			
		||||
- libpostproc
 | 
			
		||||
- libmpcodecs
 | 
			
		||||
- optional MMX optimizations for YUV to RGB colorspace conversion in
 | 
			
		||||
  libswscale/x86/yuv2rgb_template.c
 | 
			
		||||
- optional x86 optimizations in the files
 | 
			
		||||
  libavcodec/x86/h264_deblock_sse2.asm
 | 
			
		||||
  libavcodec/x86/h264_idct_sse2.asm
 | 
			
		||||
  libavcodec/x86/idct_mmx.c
 | 
			
		||||
- libutvideo encoding/decoding wrappers in
 | 
			
		||||
  libavcodec/libutvideo*.cpp
 | 
			
		||||
- the X11 grabber in libavdevice/x11grab.c
 | 
			
		||||
- the swresample test app in
 | 
			
		||||
  libswresample/swresample-test.c
 | 
			
		||||
- the texi2pod.pl tool
 | 
			
		||||
- the following filters in libavfilter:
 | 
			
		||||
    - f_ebur128.c
 | 
			
		||||
    - vf_blackframe.c
 | 
			
		||||
    - vf_boxblur.c
 | 
			
		||||
    - vf_colormatrix.c
 | 
			
		||||
    - vf_cropdetect.c
 | 
			
		||||
    - vf_decimate.c
 | 
			
		||||
    - vf_delogo.c
 | 
			
		||||
    - vf_geq.c
 | 
			
		||||
    - vf_histeq.c
 | 
			
		||||
    - vf_hqdn3d.c
 | 
			
		||||
    - vf_hue.c
 | 
			
		||||
    - vf_kerndeint.c
 | 
			
		||||
    - vf_mp.c
 | 
			
		||||
    - vf_pp.c
 | 
			
		||||
    - vf_smartblur.c
 | 
			
		||||
    - vf_super2xsai.c
 | 
			
		||||
    - vf_tinterlace.c
 | 
			
		||||
    - vf_yadif.c
 | 
			
		||||
    - vsrc_mptestsrc.c
 | 
			
		||||
 | 
			
		||||
There are a handful of files under other licensing terms, namely:
 | 
			
		||||
 | 
			
		||||
* The files libavcodec/jfdctfst.c, libavcodec/jfdctint_template.c and
 | 
			
		||||
  libavcodec/jrevdct.c are taken from libjpeg, see the top of the files for
 | 
			
		||||
  licensing details. Specifically note that you must credit the IJG in the
 | 
			
		||||
  documentation accompanying your program if you only distribute executables.
 | 
			
		||||
  You must also indicate any changes including additions and deletions to
 | 
			
		||||
  those three files in the documentation.
 | 
			
		||||
* The files libavcodec/jfdctfst.c, libavcodec/jfdctint.c, libavcodec/jrevdct.c
 | 
			
		||||
  are taken from libjpeg, see the top of the files for licensing details.
 | 
			
		||||
 | 
			
		||||
Should you, for whatever reason, prefer to use version 3 of the (L)GPL, then
 | 
			
		||||
the configure parameter --enable-version3 will activate this licensing option
 | 
			
		||||
@@ -58,32 +33,18 @@ for you. Read the file COPYING.LGPLv3 or, if you have enabled GPL parts,
 | 
			
		||||
COPYING.GPLv3 to learn the exact legal terms that apply in this case.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
external libraries
 | 
			
		||||
==================
 | 
			
		||||
external libraries:
 | 
			
		||||
-------------------
 | 
			
		||||
 | 
			
		||||
FFmpeg can be combined with a number of external libraries, which sometimes
 | 
			
		||||
affect the licensing of binaries resulting from the combination.
 | 
			
		||||
Some external libraries, e.g. libx264, are under GPL and can be used in
 | 
			
		||||
conjunction with FFmpeg. They require --enable-gpl to be passed to configure
 | 
			
		||||
as well.
 | 
			
		||||
 | 
			
		||||
compatible libraries
 | 
			
		||||
--------------------
 | 
			
		||||
The OpenCORE external libraries are under the Apache License 2.0. That license
 | 
			
		||||
is incompatible with the LGPL v2.1 and the GPL v2, but not with version 3 of
 | 
			
		||||
those licenses. So to combine the OpenCORE libraries with FFmpeg, the license
 | 
			
		||||
version needs to be upgraded by passing --enable-version3 to configure.
 | 
			
		||||
 | 
			
		||||
The libcdio, libx264, libxavs and libxvid libraries are under GPL. When
 | 
			
		||||
combining them with FFmpeg, FFmpeg needs to be licensed as GPL as well by
 | 
			
		||||
passing --enable-gpl to configure.
 | 
			
		||||
 | 
			
		||||
The OpenCORE and VisualOn libraries are under the Apache License 2.0. That
 | 
			
		||||
license is incompatible with the LGPL v2.1 and the GPL v2, but not with
 | 
			
		||||
version 3 of those licenses. So to combine these libraries with FFmpeg, the
 | 
			
		||||
license version needs to be upgraded by passing --enable-version3 to configure.
 | 
			
		||||
 | 
			
		||||
incompatible libraries
 | 
			
		||||
----------------------
 | 
			
		||||
 | 
			
		||||
The Fraunhofer AAC library, FAAC and aacplus are under licenses which
 | 
			
		||||
are incompatible with the GPLv2 and v3. We do not know for certain if their
 | 
			
		||||
licenses are compatible with the LGPL.
 | 
			
		||||
If you wish to enable these libraries, pass --enable-nonfree to configure.
 | 
			
		||||
But note that if you enable any of these libraries the resulting binary will
 | 
			
		||||
be under a complex license mix that is more restrictive than the LGPL and that
 | 
			
		||||
may result in additional obligations. It is possible that these
 | 
			
		||||
restrictions cause the resulting binary to be unredistributeable.
 | 
			
		||||
The nonfree external library libfaac can be hooked up in FFmpeg. You need to
 | 
			
		||||
pass --enable-nonfree to configure to enable it. Employ this option with care
 | 
			
		||||
as FFmpeg then becomes nonfree and unredistributable.
 | 
			
		||||
 
 | 
			
		||||
							
								
								
									
										163
									
								
								MAINTAINERS
									
									
									
									
									
								
							
							
						
						
									
										163
									
								
								MAINTAINERS
									
									
									
									
									
								
							@@ -4,12 +4,6 @@ FFmpeg maintainers
 | 
			
		||||
Below is a list of the people maintaining different parts of the
 | 
			
		||||
FFmpeg code.
 | 
			
		||||
 | 
			
		||||
Please try to keep entries where you are the maintainer up to date!
 | 
			
		||||
 | 
			
		||||
Names in () mean that the maintainer currently has no time to maintain the code.
 | 
			
		||||
A CC after the name means that the maintainer prefers to be CC-ed on patches
 | 
			
		||||
and related discussions.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
Project Leader
 | 
			
		||||
==============
 | 
			
		||||
@@ -25,10 +19,7 @@ ffmpeg:
 | 
			
		||||
  ffmpeg.c                              Michael Niedermayer
 | 
			
		||||
 | 
			
		||||
ffplay:
 | 
			
		||||
  ffplay.c                              Marton Balint
 | 
			
		||||
 | 
			
		||||
ffprobe:
 | 
			
		||||
  ffprobe.c                             Stefano Sabatini
 | 
			
		||||
  ffplay.c                              Michael Niedermayer
 | 
			
		||||
 | 
			
		||||
ffserver:
 | 
			
		||||
  ffserver.c, ffserver.h                Baptiste Coudurier
 | 
			
		||||
@@ -43,14 +34,14 @@ QuickTime faststart:
 | 
			
		||||
Miscellaneous Areas
 | 
			
		||||
===================
 | 
			
		||||
 | 
			
		||||
documentation                           Mike Melanson
 | 
			
		||||
website                                 Robert Swain, Lou Logan
 | 
			
		||||
documentation                           Mike Melanson, Diego Biurrun
 | 
			
		||||
website                                 Robert Swain
 | 
			
		||||
build system (configure,Makefiles)      Diego Biurrun, Mans Rullgard
 | 
			
		||||
project server                          Árpád Gereöffy, Michael Niedermayer, Reimar Döffinger
 | 
			
		||||
mailinglists                            Michael Niedermayer, Baptiste Coudurier, Lou Logan
 | 
			
		||||
project server                          Diego Biurrun, Mans Rullgard
 | 
			
		||||
mailinglists                            Michael Niedermayer, Baptiste Coudurier
 | 
			
		||||
presets                                 Robert Swain
 | 
			
		||||
metadata subsystem                      Aurelien Jacobs
 | 
			
		||||
release management                      Michael Niedermayer
 | 
			
		||||
release management                      Diego Biurrun, Reinhard Tartler
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
libavutil
 | 
			
		||||
@@ -87,8 +78,6 @@ Generic Parts:
 | 
			
		||||
    bitstream.c, bitstream.h            Michael Niedermayer
 | 
			
		||||
  CABAC:
 | 
			
		||||
    cabac.h, cabac.c                    Michael Niedermayer
 | 
			
		||||
  codec names:
 | 
			
		||||
    codec_names.sh                      Nicolas George
 | 
			
		||||
  DSP utilities:
 | 
			
		||||
    dsputils.c, dsputils.h              Michael Niedermayer
 | 
			
		||||
  entropy coding:
 | 
			
		||||
@@ -109,19 +98,17 @@ Generic Parts:
 | 
			
		||||
    simple_idct.c, simple_idct.h        Michael Niedermayer
 | 
			
		||||
  postprocessing:
 | 
			
		||||
    libpostproc/*                       Michael Niedermayer
 | 
			
		||||
  table generation:
 | 
			
		||||
    tableprint.c, tableprint.h          Reimar Doeffinger
 | 
			
		||||
 | 
			
		||||
Codecs:
 | 
			
		||||
  4xm.c                                 Michael Niedermayer
 | 
			
		||||
  8bps.c                                Roberto Togni
 | 
			
		||||
  8svx.c                                Jaikrishnan Menon
 | 
			
		||||
  aasc.c                                Kostya Shishkov
 | 
			
		||||
  aac*, sbr.h                           Alex Converse
 | 
			
		||||
  ac3*                                  Justin Ruggles
 | 
			
		||||
  alacenc.c                             Jaikrishnan Menon
 | 
			
		||||
  alsdec.c                              Thilo Borgmann
 | 
			
		||||
  apedec.c                              Kostya Shishkov
 | 
			
		||||
  ass*                                  Aurelien Jacobs
 | 
			
		||||
  asv*                                  Michael Niedermayer
 | 
			
		||||
  atrac3*                               Benjamin Larsson
 | 
			
		||||
  bgmc.c, bgmc.h                        Thilo Borgmann
 | 
			
		||||
@@ -130,13 +117,9 @@ Codecs:
 | 
			
		||||
  bmp.c                                 Mans Rullgard, Kostya Shishkov
 | 
			
		||||
  cavs*                                 Stefan Gehrer
 | 
			
		||||
  celp_filters.*                        Vitor Sessak
 | 
			
		||||
  cdxl.c                                Paul B Mahol
 | 
			
		||||
  cinepak.c                             Roberto Togni
 | 
			
		||||
  cljr                                  Alex Beregszaszi
 | 
			
		||||
  cllc.c                                Derek Buitenhuis
 | 
			
		||||
  cook.c, cookdata.h                    Benjamin Larsson
 | 
			
		||||
  cpia.c                                Stephan Hilb
 | 
			
		||||
  crystalhd.c                           Philip Langdale
 | 
			
		||||
  cscd.c                                Reimar Doeffinger
 | 
			
		||||
  dca.c                                 Kostya Shishkov, Benjamin Larsson
 | 
			
		||||
  dnxhd*                                Baptiste Coudurier
 | 
			
		||||
@@ -145,11 +128,9 @@ Codecs:
 | 
			
		||||
  dv.c                                  Roman Shaposhnik
 | 
			
		||||
  eacmv*, eaidct*, eat*                 Peter Ross
 | 
			
		||||
  ffv1.c                                Michael Niedermayer
 | 
			
		||||
  ffwavesynth.c                         Nicolas George
 | 
			
		||||
  flac*                                 Justin Ruggles
 | 
			
		||||
  flashsv*                              Benjamin Larsson
 | 
			
		||||
  flicvideo.c                           Mike Melanson
 | 
			
		||||
  g722.c                                Martin Storsjo
 | 
			
		||||
  g726.c                                Roman Shaposhnik
 | 
			
		||||
  gifdec.c                              Baptiste Coudurier
 | 
			
		||||
  h264*                                 Loren Merritt, Michael Niedermayer
 | 
			
		||||
@@ -162,28 +143,21 @@ Codecs:
 | 
			
		||||
  indeo5*                               Kostya Shishkov
 | 
			
		||||
  interplayvideo.c                      Mike Melanson
 | 
			
		||||
  ivi*                                  Kostya Shishkov
 | 
			
		||||
  jacosub*                              Clément Bœsch
 | 
			
		||||
  jpeg_ls.c                             Kostya Shishkov
 | 
			
		||||
  jvdec.c                               Peter Ross
 | 
			
		||||
  kmvc.c                                Kostya Shishkov
 | 
			
		||||
  lcl*.c                                Roberto Togni, Reimar Doeffinger
 | 
			
		||||
  libcelt_dec.c                         Nicolas George
 | 
			
		||||
  libgsm.c                              Michel Bardiaux
 | 
			
		||||
  libdirac*                             David Conrad
 | 
			
		||||
  libopenjpeg.c                         Jaikrishnan Menon
 | 
			
		||||
  libopenjpegenc.c                      Michael Bradshaw
 | 
			
		||||
  libschroedinger*                      David Conrad
 | 
			
		||||
  libspeexdec.c                         Justin Ruggles
 | 
			
		||||
  libtheoraenc.c                        David Conrad
 | 
			
		||||
  libutvideo*                           Derek Buitenhuis
 | 
			
		||||
  libvorbis.c                           David Conrad
 | 
			
		||||
  libxavs.c                             Stefan Gehrer
 | 
			
		||||
  libx264.c                             Mans Rullgard, Jason Garrett-Glaser
 | 
			
		||||
  loco.c                                Kostya Shishkov
 | 
			
		||||
  lzo.h, lzo.c                          Reimar Doeffinger
 | 
			
		||||
  mdec.c                                Michael Niedermayer
 | 
			
		||||
  mimic.c                               Ramiro Polla
 | 
			
		||||
  mjpeg*.c                              Michael Niedermayer
 | 
			
		||||
  mjpeg.c                               Michael Niedermayer
 | 
			
		||||
  mlp*                                  Ramiro Polla
 | 
			
		||||
  mmvideo.c                             Peter Ross
 | 
			
		||||
  mpc*                                  Kostya Shishkov
 | 
			
		||||
@@ -194,9 +168,7 @@ Codecs:
 | 
			
		||||
  msvideo1.c                            Mike Melanson
 | 
			
		||||
  nellymoserdec.c                       Benjamin Larsson
 | 
			
		||||
  nuv.c                                 Reimar Doeffinger
 | 
			
		||||
  paf.*                                 Paul B Mahol
 | 
			
		||||
  pcx.c                                 Ivo van Poorten
 | 
			
		||||
  pgssubdec.c                           Reimar Doeffinger
 | 
			
		||||
  ptx.c                                 Ivo van Poorten
 | 
			
		||||
  qcelp*                                Reynaldo H. Verdejo Pinochet
 | 
			
		||||
  qdm2.c, qdm2data.h                    Roberto Togni, Benjamin Larsson
 | 
			
		||||
@@ -216,10 +188,8 @@ Codecs:
 | 
			
		||||
  smc.c                                 Mike Melanson
 | 
			
		||||
  snow.c                                Michael Niedermayer, Loren Merritt
 | 
			
		||||
  sonic.c                               Alex Beregszaszi
 | 
			
		||||
  srt*                                  Aurelien Jacobs
 | 
			
		||||
  sunrast.c                             Ivo van Poorten
 | 
			
		||||
  svq3.c                                Michael Niedermayer
 | 
			
		||||
  tak*                                  Paul B Mahol
 | 
			
		||||
  targa.c                               Kostya Shishkov
 | 
			
		||||
  tiff.c                                Kostya Shishkov
 | 
			
		||||
  truemotion1*                          Mike Melanson
 | 
			
		||||
@@ -229,20 +199,15 @@ Codecs:
 | 
			
		||||
  tta.c                                 Alex Beregszaszi, Jaikrishnan Menon
 | 
			
		||||
  txd.c                                 Ivo van Poorten
 | 
			
		||||
  ulti*                                 Kostya Shishkov
 | 
			
		||||
  v410*.c                               Derek Buitenhuis
 | 
			
		||||
  vb.c                                  Kostya Shishkov
 | 
			
		||||
  vble.c                                Derek Buitenhuis
 | 
			
		||||
  vc1*                                  Kostya Shishkov
 | 
			
		||||
  vcr1.c                                Michael Niedermayer
 | 
			
		||||
  vda_h264_dec.c                        Xidorn Quan
 | 
			
		||||
  vima.c                                Paul B Mahol
 | 
			
		||||
  vmnc.c                                Kostya Shishkov
 | 
			
		||||
  vorbis_enc.c                          Oded Shimon
 | 
			
		||||
  vorbis_dec.c                          Denes Balatoni, David Conrad
 | 
			
		||||
  vorbis_dec.c                          Denes Balatoni
 | 
			
		||||
  vp3*                                  Mike Melanson
 | 
			
		||||
  vp5                                   Aurelien Jacobs
 | 
			
		||||
  vp6                                   Aurelien Jacobs
 | 
			
		||||
  vp8                                   David Conrad, Jason Garrett-Glaser, Ronald Bultje
 | 
			
		||||
  vqavideo.c                            Mike Melanson
 | 
			
		||||
  wavpack.c                             Kostya Shishkov
 | 
			
		||||
  wmaprodec.c                           Sascha Sommer
 | 
			
		||||
@@ -250,19 +215,13 @@ Codecs:
 | 
			
		||||
  wmv2.c                                Michael Niedermayer
 | 
			
		||||
  wnv1.c                                Kostya Shishkov
 | 
			
		||||
  xan.c                                 Mike Melanson
 | 
			
		||||
  xbm*                                  Paul B Mahol
 | 
			
		||||
  xl.c                                  Kostya Shishkov
 | 
			
		||||
  xvmc.c                                Ivan Kalvachev
 | 
			
		||||
  xwd*                                  Paul B Mahol
 | 
			
		||||
  zerocodec.c                           Derek Buitenhuis
 | 
			
		||||
  zmbv*                                 Kostya Shishkov
 | 
			
		||||
 | 
			
		||||
Hardware acceleration:
 | 
			
		||||
  crystalhd.c                           Philip Langdale
 | 
			
		||||
  dxva2*                                Laurent Aimar
 | 
			
		||||
  libstagefright.cpp                    Mohamed Naufal
 | 
			
		||||
  vaapi*                                Gwenole Beauchesne
 | 
			
		||||
  vda*                                  Sebastien Zwickert
 | 
			
		||||
  vdpau*                                Carl Eugen Hoyos
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@@ -272,27 +231,10 @@ libavdevice
 | 
			
		||||
    libavdevice/avdevice.h
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
  iec61883.c                            Georg Lippitsch
 | 
			
		||||
  libdc1394.c                           Roman Shaposhnik
 | 
			
		||||
  v4l2.c                                Luca Abeni
 | 
			
		||||
  vfwcap.c                              Ramiro Polla
 | 
			
		||||
  dshow.c                               Roger Pack
 | 
			
		||||
 | 
			
		||||
libavfilter
 | 
			
		||||
===========
 | 
			
		||||
 | 
			
		||||
Generic parts:
 | 
			
		||||
  graphdump.c                           Nicolas George
 | 
			
		||||
 | 
			
		||||
Filters:
 | 
			
		||||
  af_amerge.c                           Nicolas George
 | 
			
		||||
  af_astreamsync.c                      Nicolas George
 | 
			
		||||
  af_atempo.c                           Pavel Koshevoy
 | 
			
		||||
  af_pan.c                              Nicolas George
 | 
			
		||||
  vf_yadif.c                            Michael Niedermayer
 | 
			
		||||
 | 
			
		||||
Sources:
 | 
			
		||||
  vsrc_mandelbrot.c                     Michael Niedermayer
 | 
			
		||||
 | 
			
		||||
libavformat
 | 
			
		||||
===========
 | 
			
		||||
@@ -307,25 +249,15 @@ Generic parts:
 | 
			
		||||
Muxers/Demuxers:
 | 
			
		||||
  4xm.c                                 Mike Melanson
 | 
			
		||||
  adtsenc.c                             Robert Swain
 | 
			
		||||
  afc.c                                 Paul B Mahol
 | 
			
		||||
  aiff.c                                Baptiste Coudurier
 | 
			
		||||
  ape.c                                 Kostya Shishkov
 | 
			
		||||
  ass*                                  Aurelien Jacobs
 | 
			
		||||
  astdec.c                              Paul B Mahol
 | 
			
		||||
  astenc.c                              James Almer
 | 
			
		||||
  avi*                                  Michael Niedermayer
 | 
			
		||||
  avr.c                                 Paul B Mahol
 | 
			
		||||
  bink.c                                Peter Ross
 | 
			
		||||
  brstm.c                               Paul B Mahol
 | 
			
		||||
  caf*                                  Peter Ross
 | 
			
		||||
  cdxl.c                                Paul B Mahol
 | 
			
		||||
  crc.c                                 Michael Niedermayer
 | 
			
		||||
  daud.c                                Reimar Doeffinger
 | 
			
		||||
  dtshddec.c                            Paul B Mahol
 | 
			
		||||
  dv.c                                  Roman Shaposhnik
 | 
			
		||||
  dxa.c                                 Kostya Shishkov
 | 
			
		||||
  electronicarts.c                      Peter Ross
 | 
			
		||||
  epafdec.c                             Paul B Mahol
 | 
			
		||||
  ffm*                                  Baptiste Coudurier
 | 
			
		||||
  flac*                                 Justin Ruggles
 | 
			
		||||
  flic.c                                Mike Melanson
 | 
			
		||||
@@ -333,25 +265,17 @@ Muxers/Demuxers:
 | 
			
		||||
  gxf.c                                 Reimar Doeffinger
 | 
			
		||||
  gxfenc.c                              Baptiste Coudurier
 | 
			
		||||
  idcin.c                               Mike Melanson
 | 
			
		||||
  idroqdec.c                            Mike Melanson
 | 
			
		||||
  idroq.c                               Mike Melanson
 | 
			
		||||
  iff.c                                 Jaikrishnan Menon
 | 
			
		||||
  ipmovie.c                             Mike Melanson
 | 
			
		||||
  img2*.c                               Michael Niedermayer
 | 
			
		||||
  ircam*                                Paul B Mahol
 | 
			
		||||
  img2.c                                Michael Niedermayer
 | 
			
		||||
  iss.c                                 Stefan Gehrer
 | 
			
		||||
  jacosub*                              Clément Bœsch
 | 
			
		||||
  jvdec.c                               Peter Ross
 | 
			
		||||
  libmodplug.c                          Clément Bœsch
 | 
			
		||||
  libnut.c                              Oded Shimon
 | 
			
		||||
  lmlm4.c                               Ivo van Poorten
 | 
			
		||||
  lvfdec.c                              Paul B Mahol
 | 
			
		||||
  lxfdec.c                              Tomas Härdin
 | 
			
		||||
  matroska.c                            Aurelien Jacobs
 | 
			
		||||
  matroskadec.c                         Aurelien Jacobs
 | 
			
		||||
  matroskaenc.c                         David Conrad
 | 
			
		||||
  metadata*                             Aurelien Jacobs
 | 
			
		||||
  microdvd*                             Aurelien Jacobs
 | 
			
		||||
  mgsts.c                               Paul B Mahol
 | 
			
		||||
  mm.c                                  Peter Ross
 | 
			
		||||
  mov.c                                 Michael Niedermayer, Baptiste Coudurier
 | 
			
		||||
  movenc.c                              Michael Niedermayer, Baptiste Coudurier
 | 
			
		||||
@@ -362,69 +286,42 @@ Muxers/Demuxers:
 | 
			
		||||
  msnwc_tcp.c                           Ramiro Polla
 | 
			
		||||
  mtv.c                                 Reynaldo H. Verdejo Pinochet
 | 
			
		||||
  mxf*                                  Baptiste Coudurier
 | 
			
		||||
  mxfdec.c                              Tomas Härdin
 | 
			
		||||
  nistspheredec.c                       Paul B Mahol
 | 
			
		||||
  nsvdec.c                              Francois Revol
 | 
			
		||||
  nut.c                                 Michael Niedermayer
 | 
			
		||||
  nuv.c                                 Reimar Doeffinger
 | 
			
		||||
  oggdec.c, oggdec.h                    David Conrad
 | 
			
		||||
  oggenc.c                              Baptiste Coudurier
 | 
			
		||||
  oggparse*.c                           David Conrad
 | 
			
		||||
  oma.c                                 Maxim Poliakovski
 | 
			
		||||
  paf.c                                 Paul B Mahol
 | 
			
		||||
  psxstr.c                              Mike Melanson
 | 
			
		||||
  pva.c                                 Ivo van Poorten
 | 
			
		||||
  pvfdec.c                              Paul B Mahol
 | 
			
		||||
  r3d.c                                 Baptiste Coudurier
 | 
			
		||||
  raw.c                                 Michael Niedermayer
 | 
			
		||||
  rdt.c                                 Ronald S. Bultje
 | 
			
		||||
  rl2.c                                 Sascha Sommer
 | 
			
		||||
  rmdec.c, rmenc.c                      Ronald S. Bultje, Kostya Shishkov
 | 
			
		||||
  rtmp*                                 Kostya Shishkov
 | 
			
		||||
  rtp.c, rtpenc.c                       Martin Storsjo
 | 
			
		||||
  rtpdec_asf.*                          Ronald S. Bultje
 | 
			
		||||
  rtpenc_mpv.*, rtpenc_aac.*            Martin Storsjo
 | 
			
		||||
  rtp.c, rtpenc.c                       Luca Abeni
 | 
			
		||||
  rtp_asf.*                             Ronald S. Bultje
 | 
			
		||||
  rtp_mpv.*, rtp_aac.*                  Luca Abeni
 | 
			
		||||
  rtsp.c                                Luca Barbato
 | 
			
		||||
  sbgdec.c                              Nicolas George
 | 
			
		||||
  sdp.c                                 Martin Storsjo
 | 
			
		||||
  sdp.c                                 Luca Abeni
 | 
			
		||||
  segafilm.c                            Mike Melanson
 | 
			
		||||
  siff.c                                Kostya Shishkov
 | 
			
		||||
  smacker.c                             Kostya Shishkov
 | 
			
		||||
  smjpeg*                               Paul B Mahol
 | 
			
		||||
  srtdec.c                              Aurelien Jacobs
 | 
			
		||||
  swf.c                                 Baptiste Coudurier
 | 
			
		||||
  takdec.c                              Paul B Mahol
 | 
			
		||||
  tta.c                                 Alex Beregszaszi
 | 
			
		||||
  txd.c                                 Ivo van Poorten
 | 
			
		||||
  voc.c                                 Aurelien Jacobs
 | 
			
		||||
  wav.c                                 Michael Niedermayer
 | 
			
		||||
  wc3movie.c                            Mike Melanson
 | 
			
		||||
  westwood.c                            Mike Melanson
 | 
			
		||||
  wtv.c                                 Peter Ross
 | 
			
		||||
  wv.c                                  Kostya Shishkov
 | 
			
		||||
  wvenc.c                               Paul B Mahol
 | 
			
		||||
 | 
			
		||||
Protocols:
 | 
			
		||||
  bluray.c                              Petri Hintukainen
 | 
			
		||||
  http.c                                Ronald S. Bultje
 | 
			
		||||
  mms*.c                                Ronald S. Bultje
 | 
			
		||||
  udp.c                                 Luca Abeni
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
libswresample
 | 
			
		||||
=============
 | 
			
		||||
 | 
			
		||||
Generic parts:
 | 
			
		||||
  audioconvert.c                        Michael Niedermayer
 | 
			
		||||
  dither.c                              Michael Niedermayer
 | 
			
		||||
  rematrix*.c                           Michael Niedermayer
 | 
			
		||||
  swresample*.c                         Michael Niedermayer
 | 
			
		||||
 | 
			
		||||
Resamplers:
 | 
			
		||||
  resample*.c                           Michael Niedermayer
 | 
			
		||||
  soxr_resample.c                       Rob Sykes
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
Operating systems / CPU architectures
 | 
			
		||||
=====================================
 | 
			
		||||
 | 
			
		||||
@@ -432,6 +329,7 @@ Alpha                                   Mans Rullgard, Falk Hueffner
 | 
			
		||||
ARM                                     Mans Rullgard
 | 
			
		||||
AVR32                                   Mans Rullgard
 | 
			
		||||
MIPS                                    Mans Rullgard
 | 
			
		||||
BeOS                                    Francois Revol
 | 
			
		||||
Mac OS X / PowerPC                      Romain Dolbeau, Guillaume Poirier
 | 
			
		||||
Amiga / PowerPC                         Colin Ward
 | 
			
		||||
Linux / PowerPC                         Luca Barbato
 | 
			
		||||
@@ -442,43 +340,20 @@ Sparc                                   Roman Shaposhnik
 | 
			
		||||
x86                                     Michael Niedermayer
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
Releases
 | 
			
		||||
========
 | 
			
		||||
GnuPG Fingerprints of maintainers and others who have svn write access
 | 
			
		||||
======================================================================
 | 
			
		||||
 | 
			
		||||
1.2                                     Michael Niedermayer
 | 
			
		||||
1.1                                     Michael Niedermayer
 | 
			
		||||
1.0                                     Michael Niedermayer
 | 
			
		||||
 | 
			
		||||
If you want to maintain an older release, please contact us
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
GnuPG Fingerprints of maintainers and contributors
 | 
			
		||||
==================================================
 | 
			
		||||
 | 
			
		||||
Anssi Hannula                 1A92 FF42 2DD9 8D2E 8AF7 65A9 4278 C520 513D F3CB
 | 
			
		||||
Anton Khirnov                 6D0C 6625 56F8 65D1 E5F5 814B B50A 1241 C067 07AB
 | 
			
		||||
Attila Kinali                 11F0 F9A6 A1D2 11F6 C745 D10C 6520 BCDD F2DF E765
 | 
			
		||||
Baptiste Coudurier            8D77 134D 20CC 9220 201F C5DB 0AC9 325C 5C1A BAAA
 | 
			
		||||
Ben Littler                   3EE3 3723 E560 3214 A8CD 4DEB 2CDB FCE7 768C 8D2C
 | 
			
		||||
Benoit Fouet                  B22A 4F4F 43EF 636B BB66 FCDC 0023 AE1E 2985 49C8
 | 
			
		||||
Bœsch Clément                 52D0 3A82 D445 F194 DB8B 2B16 87EE 2CB8 F4B8 FCF9
 | 
			
		||||
Daniel Verkamp                78A6 07ED 782C 653E C628 B8B9 F0EB 8DD8 2F0E 21C7
 | 
			
		||||
Diego Biurrun                 8227 1E31 B6D9 4994 7427 E220 9CAE D6CC 4757 FCC5
 | 
			
		||||
Gwenole Beauchesne            2E63 B3A6 3E44 37E2 017D 2704 53C7 6266 B153 99C4
 | 
			
		||||
Jaikrishnan Menon             61A1 F09F 01C9 2D45 78E1 C862 25DC 8831 AF70 D368
 | 
			
		||||
Justin Ruggles                3136 ECC0 C10D 6C04 5F43 CA29 FCBE CD2A 3787 1EBF
 | 
			
		||||
Loren Merritt                 ABD9 08F4 C920 3F65 D8BE 35D7 1540 DAA7 060F 56DE
 | 
			
		||||
Lou Logan                     7D68 DC73 CBEF EABB 671A B6CF 621C 2E28 82F8 DC3A
 | 
			
		||||
Luca Barbato                  6677 4209 213C 8843 5B67 29E7 E84C 78C2 84E9 0E34
 | 
			
		||||
Michael Niedermayer           9FF2 128B 147E F673 0BAD F133 611E C787 040B 0FAB
 | 
			
		||||
Nicolas George                24CE 01CE 9ACC 5CEB 74D8 8D9D B063 D997 36E5 4C93
 | 
			
		||||
Panagiotis Issaris            6571 13A3 33D9 3726 F728 AA98 F643 B12E ECF3 E029
 | 
			
		||||
Panagiotis Issaris            515C E262 10A8 FDCE 5481 7B9C 3AD7 D9A5 071D B3A9
 | 
			
		||||
Peter Ross                    A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B
 | 
			
		||||
Reimar Döffinger              C61D 16E5 9E2C D10C 8958 38A4 0899 A2B9 06D4 D9C7
 | 
			
		||||
Reinhard Tartler              9300 5DC2 7E87 6C37 ED7B CA9A 9808 3544 9453 48A4
 | 
			
		||||
Reynaldo H. Verdejo Pinochet  6E27 CD34 170C C78E 4D4F 5F40 C18E 077F 3114 452A
 | 
			
		||||
Robert Swain                  EE7A 56EA 4A81 A7B5 2001 A521 67FA 362D A2FC 3E71
 | 
			
		||||
Sascha Sommer                 38A0 F88B 868E 9D3A 97D4 D6A0 E823 706F 1E07 0D3C
 | 
			
		||||
Stefano Sabatini              0D0B AD6B 5330 BBAD D3D6 6A0C 719C 2839 FC43 2D5F
 | 
			
		||||
Stephan Hilb                  4F38 0B3A 5F39 B99B F505 E562 8D5C 5554 4E17 8863
 | 
			
		||||
Tomas Härdin                  A79D 4E3D F38F 763F 91F5 8B33 A01E 8AE0 41BB 2551
 | 
			
		||||
 
 | 
			
		||||
							
								
								
									
										364
									
								
								Makefile
									
									
									
									
									
								
							
							
						
						
									
										364
									
								
								Makefile
									
									
									
									
									
								
							@@ -1,80 +1,62 @@
 | 
			
		||||
MAIN_MAKEFILE=1
 | 
			
		||||
include config.mak
 | 
			
		||||
 | 
			
		||||
vpath %.c    $(SRC_PATH)
 | 
			
		||||
vpath %.cpp  $(SRC_PATH)
 | 
			
		||||
vpath %.h    $(SRC_PATH)
 | 
			
		||||
vpath %.S    $(SRC_PATH)
 | 
			
		||||
vpath %.asm  $(SRC_PATH)
 | 
			
		||||
vpath %.v    $(SRC_PATH)
 | 
			
		||||
vpath %.texi $(SRC_PATH)
 | 
			
		||||
vpath %/fate_config.sh.template $(SRC_PATH)
 | 
			
		||||
SRC_DIR = $(SRC_PATH_BARE)
 | 
			
		||||
 | 
			
		||||
vpath %.texi $(SRC_PATH_BARE)
 | 
			
		||||
 | 
			
		||||
PROGS-$(CONFIG_FFMPEG)   += ffmpeg
 | 
			
		||||
PROGS-$(CONFIG_FFPLAY)   += ffplay
 | 
			
		||||
PROGS-$(CONFIG_FFPROBE)  += ffprobe
 | 
			
		||||
PROGS-$(CONFIG_FFSERVER) += ffserver
 | 
			
		||||
 | 
			
		||||
PROGS      := $(PROGS-yes:%=%$(PROGSSUF)$(EXESUF))
 | 
			
		||||
INSTPROGS   = $(PROGS-yes:%=%$(PROGSSUF)$(EXESUF))
 | 
			
		||||
 | 
			
		||||
OBJS        = cmdutils.o $(EXEOBJS)
 | 
			
		||||
OBJS-ffmpeg = ffmpeg_opt.o ffmpeg_filter.o
 | 
			
		||||
TESTTOOLS   = audiogen videogen rotozoom tiny_psnr base64
 | 
			
		||||
HOSTPROGS  := $(TESTTOOLS:%=tests/%) doc/print_options
 | 
			
		||||
TOOLS       = qt-faststart trasher
 | 
			
		||||
TOOLS-$(CONFIG_ZLIB) += cws2fws
 | 
			
		||||
PROGS      := $(addsuffix   $(EXESUF), $(PROGS-yes))
 | 
			
		||||
PROGS_G     = $(addsuffix _g$(EXESUF), $(PROGS-yes))
 | 
			
		||||
OBJS        = $(addsuffix .o,          $(PROGS-yes)) cmdutils.o
 | 
			
		||||
MANPAGES    = $(addprefix doc/, $(addsuffix .1, $(PROGS-yes)))
 | 
			
		||||
TOOLS       = $(addprefix tools/, $(addsuffix $(EXESUF), cws2fws pktdumper probetest qt-faststart trasher))
 | 
			
		||||
HOSTPROGS   = $(addprefix tests/, audiogen videogen rotozoom tiny_psnr)
 | 
			
		||||
 | 
			
		||||
BASENAMES   = ffmpeg ffplay ffprobe ffserver
 | 
			
		||||
ALLPROGS    = $(BASENAMES:%=%$(PROGSSUF)$(EXESUF))
 | 
			
		||||
ALLPROGS_G  = $(BASENAMES:%=%$(PROGSSUF)_g$(EXESUF))
 | 
			
		||||
ALLMANPAGES = $(BASENAMES:%=%.1)
 | 
			
		||||
ALLPROGS    = $(addsuffix   $(EXESUF), $(BASENAMES))
 | 
			
		||||
ALLPROGS_G  = $(addsuffix _g$(EXESUF), $(BASENAMES))
 | 
			
		||||
ALLMANPAGES = $(addsuffix .1, $(BASENAMES))
 | 
			
		||||
 | 
			
		||||
FFLIBS-$(CONFIG_AVDEVICE) += avdevice
 | 
			
		||||
FFLIBS-$(CONFIG_AVFILTER) += avfilter
 | 
			
		||||
FFLIBS-$(CONFIG_AVFORMAT) += avformat
 | 
			
		||||
FFLIBS-$(CONFIG_AVRESAMPLE) += avresample
 | 
			
		||||
FFLIBS-$(CONFIG_AVCODEC)  += avcodec
 | 
			
		||||
FFLIBS-$(CONFIG_POSTPROC) += postproc
 | 
			
		||||
FFLIBS-$(CONFIG_SWRESAMPLE)+= swresample
 | 
			
		||||
FFLIBS-$(CONFIG_SWSCALE)  += swscale
 | 
			
		||||
 | 
			
		||||
FFLIBS := avutil
 | 
			
		||||
 | 
			
		||||
DATA_FILES := $(wildcard $(SRC_PATH)/presets/*.ffpreset) $(SRC_PATH)/doc/ffprobe.xsd
 | 
			
		||||
EXAMPLES_FILES := $(wildcard $(SRC_PATH)/doc/examples/*.c) $(SRC_PATH)/doc/examples/Makefile $(SRC_PATH)/doc/examples/README
 | 
			
		||||
DATA_FILES := $(wildcard $(SRC_DIR)/ffpresets/*.ffpreset)
 | 
			
		||||
 | 
			
		||||
SKIPHEADERS = cmdutils_common_opts.h
 | 
			
		||||
 | 
			
		||||
include $(SRC_PATH)/common.mak
 | 
			
		||||
include common.mak
 | 
			
		||||
 | 
			
		||||
FF_LDFLAGS   := $(FFLDFLAGS)
 | 
			
		||||
FF_EXTRALIBS := $(FFEXTRALIBS)
 | 
			
		||||
FF_DEP_LIBS  := $(DEP_LIBS)
 | 
			
		||||
 | 
			
		||||
all: $(PROGS)
 | 
			
		||||
ALL_TARGETS-$(CONFIG_DOC)       += documentation
 | 
			
		||||
 | 
			
		||||
ifdef PROGS
 | 
			
		||||
INSTALL_TARGETS-yes             += install-progs install-data
 | 
			
		||||
INSTALL_TARGETS-$(CONFIG_DOC)   += install-man
 | 
			
		||||
endif
 | 
			
		||||
INSTALL_PROGS_TARGETS-$(CONFIG_SHARED) = install-libs
 | 
			
		||||
 | 
			
		||||
all: $(FF_DEP_LIBS) $(PROGS) $(ALL_TARGETS-yes)
 | 
			
		||||
 | 
			
		||||
$(PROGS): %$(EXESUF): %_g$(EXESUF)
 | 
			
		||||
	$(CP) $< $@
 | 
			
		||||
	$(STRIP) $@
 | 
			
		||||
 | 
			
		||||
$(TOOLS): %$(EXESUF): %.o $(EXEOBJS)
 | 
			
		||||
	$(LD) $(LDFLAGS) $(LD_O) $^ $(ELIBS)
 | 
			
		||||
 | 
			
		||||
tools/cws2fws$(EXESUF): ELIBS = $(ZLIB)
 | 
			
		||||
 | 
			
		||||
config.h: .config
 | 
			
		||||
.config: $(wildcard $(FFLIBS:%=$(SRC_PATH)/lib%/all*.c))
 | 
			
		||||
	@-tput bold 2>/dev/null
 | 
			
		||||
	@-printf '\nWARNING: $(?F) newer than config.h, rerun configure\n\n'
 | 
			
		||||
	@-tput sgr0 2>/dev/null
 | 
			
		||||
 | 
			
		||||
SUBDIR_VARS := CLEANFILES EXAMPLES FFLIBS HOSTPROGS TESTPROGS TOOLS      \
 | 
			
		||||
               HEADERS ARCH_HEADERS BUILT_HEADERS SKIPHEADERS            \
 | 
			
		||||
               ARMV5TE-OBJS ARMV6-OBJS VFP-OBJS NEON-OBJS                \
 | 
			
		||||
               ALTIVEC-OBJS VIS-OBJS                                     \
 | 
			
		||||
               MMX-OBJS YASM-OBJS                                        \
 | 
			
		||||
               MIPSFPU-OBJS MIPSDSPR2-OBJS MIPSDSPR1-OBJS MIPS32R2-OBJS  \
 | 
			
		||||
               OBJS HOSTOBJS TESTOBJS
 | 
			
		||||
SUBDIR_VARS := OBJS FFLIBS CLEANFILES DIRS TESTPROGS EXAMPLES SKIPHEADERS \
 | 
			
		||||
               ALTIVEC-OBJS MMX-OBJS NEON-OBJS X86-OBJS YASM-OBJS-FFT YASM-OBJS \
 | 
			
		||||
               HOSTPROGS BUILT_HEADERS TESTOBJS ARCH_HEADERS
 | 
			
		||||
 | 
			
		||||
define RESET
 | 
			
		||||
$(1) :=
 | 
			
		||||
@@ -84,35 +66,30 @@ endef
 | 
			
		||||
define DOSUBDIR
 | 
			
		||||
$(foreach V,$(SUBDIR_VARS),$(eval $(call RESET,$(V))))
 | 
			
		||||
SUBDIR := $(1)/
 | 
			
		||||
include $(SRC_PATH)/$(1)/Makefile
 | 
			
		||||
-include $(SRC_PATH)/$(1)/$(ARCH)/Makefile
 | 
			
		||||
include $(SRC_PATH)/library.mak
 | 
			
		||||
include $(1)/Makefile
 | 
			
		||||
endef
 | 
			
		||||
 | 
			
		||||
$(foreach D,$(FFLIBS),$(eval $(call DOSUBDIR,lib$(D))))
 | 
			
		||||
 | 
			
		||||
define DOPROG
 | 
			
		||||
OBJS-$(1) += $(1).o cmdutils.o $(EXEOBJS)
 | 
			
		||||
$(1)$(PROGSSUF)_g$(EXESUF): $$(OBJS-$(1))
 | 
			
		||||
$$(OBJS-$(1)): CFLAGS  += $(CFLAGS-$(1))
 | 
			
		||||
$(1)$(PROGSSUF)_g$(EXESUF): LDFLAGS += $(LDFLAGS-$(1))
 | 
			
		||||
$(1)$(PROGSSUF)_g$(EXESUF): FF_EXTRALIBS += $(LIBS-$(1))
 | 
			
		||||
-include $$(OBJS-$(1):.o=.d)
 | 
			
		||||
endef
 | 
			
		||||
ffplay_g$(EXESUF): FF_EXTRALIBS += $(SDL_LIBS)
 | 
			
		||||
ffserver_g$(EXESUF): FF_LDFLAGS += $(FFSERVERLDFLAGS)
 | 
			
		||||
 | 
			
		||||
$(foreach P,$(PROGS-yes),$(eval $(call DOPROG,$(P))))
 | 
			
		||||
%_g$(EXESUF): %.o cmdutils.o $(FF_DEP_LIBS)
 | 
			
		||||
	$(LD) $(FF_LDFLAGS) -o $@ $< cmdutils.o $(FF_EXTRALIBS)
 | 
			
		||||
 | 
			
		||||
%$(PROGSSUF)_g$(EXESUF): %.o $(FF_DEP_LIBS)
 | 
			
		||||
	$(LD) $(LDFLAGS) $(LD_O) $(OBJS-$*) $(FF_EXTRALIBS)
 | 
			
		||||
tools/%$(EXESUF): tools/%.o
 | 
			
		||||
	$(LD) $(FF_LDFLAGS) -o $@ $< $(FF_EXTRALIBS)
 | 
			
		||||
 | 
			
		||||
OBJDIRS += tools
 | 
			
		||||
tools/%.o: tools/%.c
 | 
			
		||||
	$(CC) $(CPPFLAGS) $(CFLAGS) $(CC_O) $<
 | 
			
		||||
 | 
			
		||||
-include $(wildcard tools/*.d)
 | 
			
		||||
ffplay.o ffplay.d: CFLAGS += $(SDL_CFLAGS)
 | 
			
		||||
 | 
			
		||||
VERSION_SH  = $(SRC_PATH)/version.sh
 | 
			
		||||
GIT_LOG     = $(SRC_PATH)/.git/logs/HEAD
 | 
			
		||||
VERSION_SH  = $(SRC_PATH_BARE)/version.sh
 | 
			
		||||
GIT_LOG     = $(SRC_PATH_BARE)/.git/logs/HEAD
 | 
			
		||||
SVN_ENTRIES = $(SRC_PATH_BARE)/.svn/entries
 | 
			
		||||
 | 
			
		||||
.version: $(wildcard $(GIT_LOG)) $(VERSION_SH) config.mak
 | 
			
		||||
.version: $(wildcard $(GIT_LOG) $(SVN_ENTRIES)) $(VERSION_SH) config.mak
 | 
			
		||||
.version: M=@
 | 
			
		||||
 | 
			
		||||
version.h .version:
 | 
			
		||||
@@ -122,27 +99,39 @@ version.h .version:
 | 
			
		||||
# force version.sh to run whenever version might have changed
 | 
			
		||||
-include .version
 | 
			
		||||
 | 
			
		||||
ifdef PROGS
 | 
			
		||||
install: install-progs install-data
 | 
			
		||||
endif
 | 
			
		||||
alltools: $(TOOLS)
 | 
			
		||||
 | 
			
		||||
install: install-libs install-headers
 | 
			
		||||
documentation: $(addprefix doc/, developer.html faq.html ffmpeg-doc.html \
 | 
			
		||||
                                 ffplay-doc.html ffprobe-doc.html ffserver-doc.html \
 | 
			
		||||
                                 general.html libavfilter.html $(ALLMANPAGES))
 | 
			
		||||
 | 
			
		||||
install-libs: install-libs-yes
 | 
			
		||||
doc/%.html: TAG = HTML
 | 
			
		||||
doc/%.html: doc/%.texi
 | 
			
		||||
	$(M)cd doc && texi2html -monolithic -number $(<:doc/%=%)
 | 
			
		||||
 | 
			
		||||
install-progs-yes:
 | 
			
		||||
install-progs-$(CONFIG_SHARED): install-libs
 | 
			
		||||
doc/%.pod: TAG = POD
 | 
			
		||||
doc/%.pod: doc/%-doc.texi
 | 
			
		||||
	$(M)doc/texi2pod.pl $< $@
 | 
			
		||||
 | 
			
		||||
install-progs: install-progs-yes $(PROGS)
 | 
			
		||||
doc/%.1: TAG = MAN
 | 
			
		||||
doc/%.1: doc/%.pod
 | 
			
		||||
	$(M)pod2man --section=1 --center=" " --release=" " $< > $@
 | 
			
		||||
 | 
			
		||||
install: $(INSTALL_TARGETS-yes)
 | 
			
		||||
 | 
			
		||||
install-progs: $(PROGS) $(INSTALL_PROGS_TARGETS-yes)
 | 
			
		||||
	$(Q)mkdir -p "$(BINDIR)"
 | 
			
		||||
	$(INSTALL) -c -m 755 $(INSTPROGS) "$(BINDIR)"
 | 
			
		||||
	$(INSTALL) -c -m 755 $(PROGS) "$(BINDIR)"
 | 
			
		||||
 | 
			
		||||
install-data: $(DATA_FILES) $(EXAMPLES_FILES)
 | 
			
		||||
	$(Q)mkdir -p "$(DATADIR)/examples"
 | 
			
		||||
install-data: $(DATA_FILES)
 | 
			
		||||
	$(Q)mkdir -p "$(DATADIR)"
 | 
			
		||||
	$(INSTALL) -m 644 $(DATA_FILES) "$(DATADIR)"
 | 
			
		||||
	$(INSTALL) -m 644 $(EXAMPLES_FILES) "$(DATADIR)/examples"
 | 
			
		||||
 | 
			
		||||
uninstall: uninstall-libs uninstall-headers uninstall-progs uninstall-data
 | 
			
		||||
install-man: $(MANPAGES)
 | 
			
		||||
	$(Q)mkdir -p "$(MANDIR)/man1"
 | 
			
		||||
	$(INSTALL) -m 644 $(MANPAGES) "$(MANDIR)/man1"
 | 
			
		||||
 | 
			
		||||
uninstall: uninstall-progs uninstall-data uninstall-man
 | 
			
		||||
 | 
			
		||||
uninstall-progs:
 | 
			
		||||
	$(RM) $(addprefix "$(BINDIR)/", $(ALLPROGS))
 | 
			
		||||
@@ -150,44 +139,215 @@ uninstall-progs:
 | 
			
		||||
uninstall-data:
 | 
			
		||||
	$(RM) -r "$(DATADIR)"
 | 
			
		||||
 | 
			
		||||
clean::
 | 
			
		||||
uninstall-man:
 | 
			
		||||
	$(RM) $(addprefix "$(MANDIR)/man1/",$(ALLMANPAGES))
 | 
			
		||||
 | 
			
		||||
testclean:
 | 
			
		||||
	$(RM) -r tests/vsynth1 tests/vsynth2 tests/data
 | 
			
		||||
	$(RM) $(addprefix tests/,$(CLEANSUFFIXES))
 | 
			
		||||
	$(RM) tests/seek_test$(EXESUF) tests/seek_test.o
 | 
			
		||||
	$(RM) $(addprefix tests/,$(addsuffix $(HOSTEXESUF),audiogen videogen rotozoom tiny_psnr))
 | 
			
		||||
 | 
			
		||||
clean:: testclean
 | 
			
		||||
	$(RM) $(ALLPROGS) $(ALLPROGS_G)
 | 
			
		||||
	$(RM) $(CLEANSUFFIXES)
 | 
			
		||||
	$(RM) $(CLEANSUFFIXES:%=tools/%)
 | 
			
		||||
	$(RM) coverage.info
 | 
			
		||||
	$(RM) -r coverage-html
 | 
			
		||||
	$(RM) doc/*.html doc/*.pod doc/*.1
 | 
			
		||||
	$(RM) $(TOOLS)
 | 
			
		||||
 | 
			
		||||
distclean::
 | 
			
		||||
	$(RM) $(DISTCLEANSUFFIXES)
 | 
			
		||||
	$(RM) config.* .version version.h libavutil/avconfig.h libavcodec/codec_names.h
 | 
			
		||||
	$(RM) version.h config.* libavutil/avconfig.h
 | 
			
		||||
 | 
			
		||||
config:
 | 
			
		||||
	$(SRC_PATH)/configure $(value FFMPEG_CONFIGURATION)
 | 
			
		||||
 | 
			
		||||
# Without the sed genthml thinks "libavutil" and "./libavutil" are two different things
 | 
			
		||||
coverage.info: $(wildcard *.gcda *.gcno */*.gcda */*.gcno */*/*.gcda */*/*.gcno)
 | 
			
		||||
	$(Q)lcov -c -d . -b . | sed -e 's#/./#/#g' > $@
 | 
			
		||||
# regression tests
 | 
			
		||||
 | 
			
		||||
coverage-html: coverage.info
 | 
			
		||||
	$(Q)mkdir -p $@
 | 
			
		||||
	$(Q)genhtml -o $@ $<
 | 
			
		||||
	$(Q)touch $@
 | 
			
		||||
check: test checkheaders
 | 
			
		||||
 | 
			
		||||
check: all alltools examples testprogs fate
 | 
			
		||||
fulltest test: codectest lavftest seektest
 | 
			
		||||
 | 
			
		||||
include $(SRC_PATH)/doc/Makefile
 | 
			
		||||
include $(SRC_PATH)/tests/Makefile
 | 
			
		||||
FFSERVER_REFFILE = $(SRC_PATH)/tests/ffserver.regression.ref
 | 
			
		||||
SEEK_REFFILE     = $(SRC_PATH)/tests/seek.regression.ref
 | 
			
		||||
 | 
			
		||||
$(sort $(OBJDIRS)):
 | 
			
		||||
	$(Q)mkdir -p $@
 | 
			
		||||
ENCDEC = $(and $(CONFIG_$(1)_ENCODER),$(CONFIG_$(1)_DECODER))
 | 
			
		||||
MUXDEM = $(and $(CONFIG_$(1)_MUXER),$(CONFIG_$(or $(2),$(1))_DEMUXER))
 | 
			
		||||
 | 
			
		||||
# Dummy rule to stop make trying to rebuild removed or renamed headers
 | 
			
		||||
%.h:
 | 
			
		||||
	@:
 | 
			
		||||
VCODEC_TESTS =
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,ASV1)             += asv1
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,ASV2)             += asv2
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,DNXHD)            += dnxhd_1080i dnxhd_720p dnxhd_720p_rd
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,DVVIDEO)          += dv dv50
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,FFV1)             += ffv1
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,FLASHSV)          += flashsv
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,FLV)              += flv
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,H261)             += h261
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,H263)             += h263 h263p
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,HUFFYUV)          += huffyuv
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,JPEGLS)           += jpegls
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,MJPEG)            += mjpeg ljpeg
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,MPEG1VIDEO)       += mpeg mpeg1b
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,MPEG2VIDEO)       += mpeg2 mpeg2thread
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,MPEG4)            += mpeg4 mpeg4adv mpeg4nr mpeg4thread error rc
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,MSMPEG4V1)        += msmpeg4
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,MSMPEG4V2)        += msmpeg4v2
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,ROQ)              += roq
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,RV10)             += rv10
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,RV20)             += rv20
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,SNOW)             += snow snowll
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,SVQ1)             += svq1
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,WMV1)             += wmv1
 | 
			
		||||
VCODEC_TESTS-$(call ENCDEC,WMV2)             += wmv2
 | 
			
		||||
 | 
			
		||||
# Disable suffix rules.  Most of the builtin rules are suffix rules,
 | 
			
		||||
# so this saves some time on slow systems.
 | 
			
		||||
.SUFFIXES:
 | 
			
		||||
ACODEC_TESTS =
 | 
			
		||||
ACODEC_TESTS-$(call ENCDEC,AC3)              += ac3
 | 
			
		||||
ACODEC_TESTS-$(call ENCDEC,ADPCM_G726)       += g726
 | 
			
		||||
ACODEC_TESTS-$(call ENCDEC,ADPCM_IMA_QT)     += adpcm_ima_qt
 | 
			
		||||
ACODEC_TESTS-$(call ENCDEC,ADPCM_IMA_WAV)    += adpcm_ima_wav
 | 
			
		||||
ACODEC_TESTS-$(call ENCDEC,ADPCM_MS)         += adpcm_ms
 | 
			
		||||
ACODEC_TESTS-$(call ENCDEC,ADPCM_SWF)        += adpcm_swf
 | 
			
		||||
ACODEC_TESTS-$(call ENCDEC,ADPCM_YAMAHA)     += adpcm_yam
 | 
			
		||||
ACODEC_TESTS-$(call ENCDEC,ALAC)             += alac
 | 
			
		||||
ACODEC_TESTS-$(call ENCDEC,FLAC)             += flac
 | 
			
		||||
ACODEC_TESTS-$(call ENCDEC,MP2)              += mp2
 | 
			
		||||
ACODEC_TESTS-$(call ENCDEC,PCM_S16LE)        += pcm         # fixme
 | 
			
		||||
ACODEC_TESTS-$(call ENCDEC,WMAV1)            += wmav1
 | 
			
		||||
ACODEC_TESTS-$(call ENCDEC,WMAV1)            += wmav2
 | 
			
		||||
 | 
			
		||||
.PHONY: all all-yes alltools check *clean config install*
 | 
			
		||||
.PHONY: testprogs uninstall*
 | 
			
		||||
LAVF_TESTS =
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,AIFF)               += aiff
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,PCM_ALAW)           += alaw
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,ASF)                += asf
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,AU)                 += au
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,AVI)                += avi
 | 
			
		||||
LAVF_TESTS-$(call ENCDEC,BMP)                += bmp
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,DV)                 += dv_fmt
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,FFM)                += ffm
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,FLV)                += flv_fmt
 | 
			
		||||
LAVF_TESTS-$(call ENCDEC,GIF)                += gif
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,GXF)                += gxf
 | 
			
		||||
LAVF_TESTS-$(call ENCDEC,MJPEG)              += jpg
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,MATROSKA)           += mkv
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,MMF)                += mmf
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,MOV)                += mov
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,MPEG1SYSTEM,MPEGPS) += mpg
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,PCM_MULAW)          += mulaw
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,MXF)                += mxf
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,NUT)                += nut
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,OGG)                += ogg
 | 
			
		||||
LAVF_TESTS-$(call ENCDEC,PBM)                += pbmpipe
 | 
			
		||||
LAVF_TESTS-$(call ENCDEC,PCX)                += pcx
 | 
			
		||||
LAVF_TESTS-$(call ENCDEC,PGM)                += pgm pgmpipe
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,RAWVIDEO)           += pixfmt
 | 
			
		||||
LAVF_TESTS-$(call ENCDEC,PPM)                += ppm ppmpipe
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,RM)                 += rm
 | 
			
		||||
LAVF_TESTS-$(call ENCDEC,SGI)                += sgi
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,SWF)                += swf
 | 
			
		||||
LAVF_TESTS-$(call ENCDEC,TARGA)              += tga
 | 
			
		||||
LAVF_TESTS-$(call ENCDEC,TIFF)               += tiff
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,MPEGTS)             += ts
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,VOC)                += voc
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,WAV)                += wav
 | 
			
		||||
LAVF_TESTS-$(call MUXDEM,YUV4MPEGPIPE)       += yuv4mpeg
 | 
			
		||||
 | 
			
		||||
LAVFI_TESTS =           \
 | 
			
		||||
    crop                \
 | 
			
		||||
    crop_scale          \
 | 
			
		||||
    crop_scale_vflip    \
 | 
			
		||||
    crop_vflip          \
 | 
			
		||||
    null                \
 | 
			
		||||
    scale200            \
 | 
			
		||||
    scale500            \
 | 
			
		||||
    vflip               \
 | 
			
		||||
    vflip_crop          \
 | 
			
		||||
    vflip_vflip         \
 | 
			
		||||
 | 
			
		||||
ACODEC_TESTS := $(addprefix regtest-, $(ACODEC_TESTS) $(ACODEC_TESTS-yes))
 | 
			
		||||
VCODEC_TESTS := $(addprefix regtest-, $(VCODEC_TESTS) $(VCODEC_TESTS-yes))
 | 
			
		||||
LAVF_TESTS  := $(addprefix regtest-, $(LAVF_TESTS)  $(LAVF_TESTS-yes))
 | 
			
		||||
LAVFI_TESTS := $(addprefix regtest-, $(LAVFI_TESTS) $(LAVFI_TESTS-yes))
 | 
			
		||||
 | 
			
		||||
CODEC_TESTS = $(VCODEC_TESTS) $(ACODEC_TESTS)
 | 
			
		||||
 | 
			
		||||
codectest: $(CODEC_TESTS)
 | 
			
		||||
lavftest:  $(LAVF_TESTS)
 | 
			
		||||
lavfitest: $(LAVFI_TESTS)
 | 
			
		||||
 | 
			
		||||
$(ACODEC_TESTS): regtest-aref
 | 
			
		||||
$(VCODEC_TESTS): regtest-vref
 | 
			
		||||
$(LAVF_TESTS) $(LAVFI_TESTS): regtest-ref
 | 
			
		||||
 | 
			
		||||
REFFILE = $(SRC_PATH)/tests/ref/$(1)/$(2:regtest-%=%)
 | 
			
		||||
RESFILE = tests/data/$(2:regtest-%=%).$(1).regression
 | 
			
		||||
 | 
			
		||||
define CODECTEST_CMD
 | 
			
		||||
	$(SRC_PATH)/tests/codec-regression.sh $@ vsynth1 tests/vsynth1 "$(TARGET_EXEC)" "$(TARGET_PATH)"
 | 
			
		||||
	$(SRC_PATH)/tests/codec-regression.sh $@ vsynth2 tests/vsynth2 "$(TARGET_EXEC)" "$(TARGET_PATH)"
 | 
			
		||||
endef
 | 
			
		||||
 | 
			
		||||
regtest-ref: regtest-aref regtest-vref
 | 
			
		||||
 | 
			
		||||
regtest-vref: ffmpeg$(EXESUF) tests/vsynth1/00.pgm tests/vsynth2/00.pgm
 | 
			
		||||
	$(CODECTEST_CMD)
 | 
			
		||||
 | 
			
		||||
regtest-aref: ffmpeg$(EXESUF) tests/data/asynth1.sw
 | 
			
		||||
	@$(SRC_PATH)/tests/codec-regression.sh $@ acodec tests/acodec "$(TARGET_EXEC)" "$(TARGET_PATH)"
 | 
			
		||||
 | 
			
		||||
$(VCODEC_TESTS): tests/tiny_psnr$(HOSTEXESUF)
 | 
			
		||||
	@echo "TEST VCODEC $(@:regtest-%=%)"
 | 
			
		||||
	@$(CODECTEST_CMD)
 | 
			
		||||
	@diff -u -w $(call REFFILE,vsynth1,$@) $(call RESFILE,vsynth1,$@)
 | 
			
		||||
	@diff -u -w $(call REFFILE,vsynth2,$@) $(call RESFILE,vsynth2,$@)
 | 
			
		||||
 | 
			
		||||
$(ACODEC_TESTS): tests/tiny_psnr$(HOSTEXESUF)
 | 
			
		||||
	@echo "TEST ACODEC $(@:regtest-%=%)"
 | 
			
		||||
	@$(SRC_PATH)/tests/codec-regression.sh $@ acodec tests/acodec "$(TARGET_EXEC)" "$(TARGET_PATH)"
 | 
			
		||||
	@diff -u -w $(call REFFILE,acodec,$@) $(call RESFILE,acodec,$@)
 | 
			
		||||
 | 
			
		||||
$(LAVF_TESTS):
 | 
			
		||||
	@echo "TEST LAVF  $(@:regtest-%=%)"
 | 
			
		||||
	@$(SRC_PATH)/tests/lavf-regression.sh $@ lavf tests/vsynth1 "$(TARGET_EXEC)" "$(TARGET_PATH)"
 | 
			
		||||
	@diff -u -w $(call REFFILE,lavf,$@) $(call RESFILE,lavf,$@)
 | 
			
		||||
 | 
			
		||||
$(LAVFI_TESTS):
 | 
			
		||||
	@echo "TEST LAVFI $(@:regtest-%=%)"
 | 
			
		||||
	@$(SRC_PATH)/tests/lavfi-regression.sh $@ lavfi tests/vsynth1 "$(TARGET_EXEC)" "$(TARGET_PATH)"
 | 
			
		||||
	@diff -u -w $(call REFFILE,lavfi,$@) $(call RESFILE,lavfi,$@)
 | 
			
		||||
 | 
			
		||||
seektest: codectest lavftest tests/seek_test$(EXESUF)
 | 
			
		||||
	$(SRC_PATH)/tests/seek-regression.sh $(SRC_PATH) "$(TARGET_EXEC)" "$(TARGET_PATH)"
 | 
			
		||||
 | 
			
		||||
ffservertest: ffserver$(EXESUF) tests/vsynth1/00.pgm tests/data/asynth1.sw
 | 
			
		||||
	@echo
 | 
			
		||||
	@echo "Unfortunately ffserver is broken and therefore its regression"
 | 
			
		||||
	@echo "test fails randomly. Treat the results accordingly."
 | 
			
		||||
	@echo
 | 
			
		||||
	$(SRC_PATH)/tests/ffserver-regression.sh $(FFSERVER_REFFILE) $(SRC_PATH)/tests/ffserver.conf
 | 
			
		||||
 | 
			
		||||
tests/vsynth1/00.pgm: tests/videogen$(HOSTEXESUF)
 | 
			
		||||
	mkdir -p tests/vsynth1
 | 
			
		||||
	$(BUILD_ROOT)/$< 'tests/vsynth1/'
 | 
			
		||||
 | 
			
		||||
tests/vsynth2/00.pgm: tests/rotozoom$(HOSTEXESUF)
 | 
			
		||||
	mkdir -p tests/vsynth2
 | 
			
		||||
	$(BUILD_ROOT)/$< 'tests/vsynth2/' $(SRC_PATH)/tests/lena.pnm
 | 
			
		||||
 | 
			
		||||
tests/data/asynth1.sw: tests/audiogen$(HOSTEXESUF)
 | 
			
		||||
	mkdir -p tests/data
 | 
			
		||||
	$(BUILD_ROOT)/$< $@
 | 
			
		||||
 | 
			
		||||
tests/seek_test$(EXESUF): tests/seek_test.o $(FF_DEP_LIBS)
 | 
			
		||||
	$(LD) $(FF_LDFLAGS) -o $@ $< $(FF_EXTRALIBS)
 | 
			
		||||
 | 
			
		||||
ifdef SAMPLES
 | 
			
		||||
include $(SRC_PATH_BARE)/tests/fate.mak
 | 
			
		||||
fate: $(FATE_TESTS)
 | 
			
		||||
$(FATE_TESTS): ffmpeg$(EXESUF)
 | 
			
		||||
	@echo "TEST FATE   $(@:fate-%=%)"
 | 
			
		||||
	@$(SRC_PATH)/tests/fate-run.sh $@ "$(SAMPLES)" "$(TARGET_EXEC)" "$(TARGET_PATH)" '$(CMD)'
 | 
			
		||||
else
 | 
			
		||||
fate:
 | 
			
		||||
	@echo "SAMPLES not specified, cannot run FATE"
 | 
			
		||||
endif
 | 
			
		||||
 | 
			
		||||
.PHONY: documentation *test regtest-* zlib-error alltools check config
 | 
			
		||||
 
 | 
			
		||||
							
								
								
									
										8
									
								
								README
									
									
									
									
									
								
							
							
						
						
									
										8
									
								
								README
									
									
									
									
									
								
							@@ -4,15 +4,9 @@ FFmpeg README
 | 
			
		||||
1) Documentation
 | 
			
		||||
----------------
 | 
			
		||||
 | 
			
		||||
* Read the documentation in the doc/ directory in git.
 | 
			
		||||
  You can also view it online at http://ffmpeg.org/documentation.html
 | 
			
		||||
* Read the documentation in the doc/ directory.
 | 
			
		||||
 | 
			
		||||
2) Licensing
 | 
			
		||||
------------
 | 
			
		||||
 | 
			
		||||
* See the LICENSE file.
 | 
			
		||||
 | 
			
		||||
3) Build and Install
 | 
			
		||||
--------------------
 | 
			
		||||
 | 
			
		||||
* See the INSTALL file.
 | 
			
		||||
 
 | 
			
		||||
							
								
								
									
										213
									
								
								RELEASE
									
									
									
									
									
								
							
							
						
						
									
										213
									
								
								RELEASE
									
									
									
									
									
								
							@@ -1 +1,212 @@
 | 
			
		||||
1.1.13
 | 
			
		||||
Release Notes
 | 
			
		||||
=============
 | 
			
		||||
 | 
			
		||||
* 0.6 "Works with HTML5" June, 2010
 | 
			
		||||
 | 
			
		||||
General notes
 | 
			
		||||
-------------
 | 
			
		||||
 | 
			
		||||
This release focuses on improvements for the new multimedia elements in HTML5.
 | 
			
		||||
The H.264 and Theora decoders are now significantly faster, the Vorbis decoder
 | 
			
		||||
has seen important updates and this release supports Google's newly released
 | 
			
		||||
libvpx library for the VP8 codec and WebM container.
 | 
			
		||||
 | 
			
		||||
Other important changes are additions of decoders including, but not limited to,
 | 
			
		||||
Intel Indeo 5, WMA Pro, WMA Voice and HE-AAC.
 | 
			
		||||
 | 
			
		||||
See the Changelog file for a list of significant changes.
 | 
			
		||||
 | 
			
		||||
Please note that our policy on bug reports has not changed. We still only accept
 | 
			
		||||
bug reports against HEAD of the FFmpeg trunk repository. If you are experiencing
 | 
			
		||||
any issues with any formally released version of FFmpeg, please try a current
 | 
			
		||||
version of the development code to check if the issue still exists. If it does,
 | 
			
		||||
make your report against the development code following the usual bug reporting
 | 
			
		||||
guidelines.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
API and other notable Changes
 | 
			
		||||
-----------------------------
 | 
			
		||||
 | 
			
		||||
Please see the file doc/APIchanges for programmer-centric information.
 | 
			
		||||
 | 
			
		||||
Notable changes:
 | 
			
		||||
- deprecated vhook subsystem removed
 | 
			
		||||
- deprecated old scaler removed
 | 
			
		||||
- nonfree libamr support for AMR-NB/WB decoding/encoding removed
 | 
			
		||||
- RTMP support in libavformat
 | 
			
		||||
- -formats option split into -formats, -codecs, -bsfs, and -protocols
 | 
			
		||||
- ffprobe tool
 | 
			
		||||
- RTMP/RTMPT/RTMPS/RTMPE/RTMPTE protocol support via librtmp
 | 
			
		||||
- CODEC_CAP_EXPERIMENTAL added
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
Added Codecs:
 | 
			
		||||
-------------
 | 
			
		||||
 | 
			
		||||
- VQF demuxer
 | 
			
		||||
- PCX encoder
 | 
			
		||||
- CorePNG decoding support
 | 
			
		||||
- 8088flex TMV demuxer and decoder
 | 
			
		||||
- enable symbol versioning by default for linkers that support it
 | 
			
		||||
- V210 decoder and encoder
 | 
			
		||||
- QCP demuxer
 | 
			
		||||
- SoX native format muxer and demuxer
 | 
			
		||||
- AMR-NB decoding/encoding, AMR-WB decoding via OpenCORE libraries
 | 
			
		||||
- DPX image decoder
 | 
			
		||||
- Electronic Arts Madcow decoder
 | 
			
		||||
- DivX (XSUB) subtitle encoder
 | 
			
		||||
- experimental AAC encoder
 | 
			
		||||
- Wave64 demuxer
 | 
			
		||||
- IEC-61937 compatible Muxer
 | 
			
		||||
- TwinVQ decoder
 | 
			
		||||
- Bluray (PGS) subtitle decoder
 | 
			
		||||
- LPCM support in MPEG-TS (HDMV RID as found on Blu-ray disks)
 | 
			
		||||
- WMA Pro decoder
 | 
			
		||||
- Core Audio Format demuxer
 | 
			
		||||
- Atrac1 decoder
 | 
			
		||||
- MD STUDIO audio demuxer
 | 
			
		||||
- RF64 support in WAV demuxer
 | 
			
		||||
- MPEG-4 Audio Lossless Coding (ALS) decoder
 | 
			
		||||
- IV8 demuxer
 | 
			
		||||
- CDG demuxer and decoder
 | 
			
		||||
- R210 decoder
 | 
			
		||||
- Auravision Aura 1 and 2 decoders
 | 
			
		||||
- Deluxe Paint Animation playback system
 | 
			
		||||
- SIPR decoder
 | 
			
		||||
- Adobe Filmstrip muxer and demuxer
 | 
			
		||||
- RTP packetization and depacketization of H.263 and AMR
 | 
			
		||||
- Bink demuxer and audio/video decoders
 | 
			
		||||
- IFF PBM/ILBM bitmap decoder
 | 
			
		||||
- Indeo 5 decoder
 | 
			
		||||
- WMA Voice decoder
 | 
			
		||||
- AMR-NB decoder
 | 
			
		||||
- RTSP muxer
 | 
			
		||||
- HE-AAC v1 decoder
 | 
			
		||||
- Kega Game Video (KGV1) decoder
 | 
			
		||||
- Psygnosis YOP demuxer and video decoder
 | 
			
		||||
- RTP hinting in the mov/3gp/mp4 muxer
 | 
			
		||||
- VP8 decoding via libvpx
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
Notable license related changes
 | 
			
		||||
-------------------------------
 | 
			
		||||
 | 
			
		||||
- remaining GPL parts in AC-3 decoder converted to LGPL
 | 
			
		||||
- libswscale can now be compiled in LGPL mode
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
* 0.6.1
 | 
			
		||||
 | 
			
		||||
General notes
 | 
			
		||||
-------------
 | 
			
		||||
 | 
			
		||||
This point release includes some updates to make the 0.6 release series usable
 | 
			
		||||
for users that need to retain the existing behavior as closely as possible.
 | 
			
		||||
The changes follow below:
 | 
			
		||||
 | 
			
		||||
Bugfixes
 | 
			
		||||
--------
 | 
			
		||||
 | 
			
		||||
- fix autodetection of E-AC-3 substream samples
 | 
			
		||||
- performance fix for seekable HTTP
 | 
			
		||||
- add missing VP80 fourcc code for the VP8 codec
 | 
			
		||||
- small documentation fixes
 | 
			
		||||
- fix several potentially exploitable issues in the FLIC decoder
 | 
			
		||||
  (addresses CVE-2010-3429)
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
HE-AAC v2 backport
 | 
			
		||||
------------------
 | 
			
		||||
 | 
			
		||||
This release includes a backport of the AAC decoder from trunk, which
 | 
			
		||||
enables proper playback of HE-AAC v2 media.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
* 0.6.2
 | 
			
		||||
 | 
			
		||||
General notes
 | 
			
		||||
-------------
 | 
			
		||||
 | 
			
		||||
This is a maintenance-only release that addresses a small number of security
 | 
			
		||||
and portability issues. Distributors and system integrators are encouraged
 | 
			
		||||
to update and share their patches against this branch.
 | 
			
		||||
 | 
			
		||||
Security fixes
 | 
			
		||||
--------------
 | 
			
		||||
 | 
			
		||||
Programming errors in container and codec implementations may lead to
 | 
			
		||||
denial of service or the execution of arbitrary code if the user is
 | 
			
		||||
tricked into opening a malformed media file or stream.
 | 
			
		||||
 | 
			
		||||
Affected and updated have been the implementations of the following
 | 
			
		||||
codecs and container formats:
 | 
			
		||||
 | 
			
		||||
 - VC1 decoder (Change related to CVE-2011-0723)
 | 
			
		||||
 - APE decoder (cf. http://packetstorm.linuxsecurity.com/1103-exploits/vlc105-dos.txt)
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
* 0.6.3
 | 
			
		||||
 | 
			
		||||
General notes
 | 
			
		||||
-------------
 | 
			
		||||
 | 
			
		||||
This is a mostly maintenance-only release that addresses a small number
 | 
			
		||||
of bugs such as security and compilation issues. Moreover, this release
 | 
			
		||||
has been updated to work with gcc-4.6 and the VisualOn AAC encoder has
 | 
			
		||||
been backported from the Libav 0.7.2 release. Distributors and system
 | 
			
		||||
integrators are encouraged to update and share their patches against
 | 
			
		||||
this branch.
 | 
			
		||||
For a full list of changes please see the Changelog file.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
* 0.6.4
 | 
			
		||||
 | 
			
		||||
General notes
 | 
			
		||||
-------------
 | 
			
		||||
 | 
			
		||||
This mostly maintenance-only release that addresses a number a number of
 | 
			
		||||
bugs such as security and compilation issues that have been brought to
 | 
			
		||||
our attention. Among other (rather minor) fixes, this release features
 | 
			
		||||
fixes for the QDM2 decoder (CVE-2011-4351), vp3 decoder (CVE-2011-4352),
 | 
			
		||||
DoS in the VP5/VP6 decoders (CVE-2011-4353), a buffer overflow in the
 | 
			
		||||
Sierra VMD decoder CVE-2011-4364, and a safety fix in the svq1 decoder
 | 
			
		||||
(CVE-2011-4579).
 | 
			
		||||
 | 
			
		||||
Distributors and system integrators are encouraged
 | 
			
		||||
to update and share their patches against this branch.  For a full list
 | 
			
		||||
of changes please see the Changelog file.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
* 0.6.5
 | 
			
		||||
 | 
			
		||||
General notes
 | 
			
		||||
-------------
 | 
			
		||||
 | 
			
		||||
This mostly maintenance-only release that addresses a number a number of
 | 
			
		||||
bugs such as security and compilation issues that have been brought to
 | 
			
		||||
our attention. Among other (rather minor) fixes, this release features
 | 
			
		||||
fixes for the VP3 decoder (CVE-2011-3892), vorbis decoder, and matroska
 | 
			
		||||
demuxer (CVE-2011-3893 and CVE-2011-3895).
 | 
			
		||||
 | 
			
		||||
Distributors and system integrators are encouraged
 | 
			
		||||
to update and share their patches against this branch.  For a full list
 | 
			
		||||
of changes please see the Changelog file.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
* 0.6.6
 | 
			
		||||
 | 
			
		||||
General notes
 | 
			
		||||
-------------
 | 
			
		||||
 | 
			
		||||
This mostly maintenance-only release that addresses a number a number of
 | 
			
		||||
bugs such as security and compilation issues that have been brought to
 | 
			
		||||
our attention. Among other fixes, this release features includes
 | 
			
		||||
security updates for the, DV decoder (CVE-2011-3929 and CVE-2011-3936),
 | 
			
		||||
VQA Video Decoder (CVE-2012-0947), DPCM codecs (CVE-2011-3951), AAC SBR
 | 
			
		||||
(CVE-2012-0850), H.264 (CVE-2012-0851), ADPCM (CVE-2012-0852), Shorten
 | 
			
		||||
(CVE-2012-0858), and the KMVC decoder (CVE-2011-3952).
 | 
			
		||||
 | 
			
		||||
Distributors and system integrators are encouraged
 | 
			
		||||
to update and share their patches against this branch.  For a full list
 | 
			
		||||
of changes please see the Changelog file or the git commit history.
 | 
			
		||||
 
 | 
			
		||||
							
								
								
									
										16
									
								
								arch.mak
									
									
									
									
									
								
							
							
						
						
									
										16
									
								
								arch.mak
									
									
									
									
									
								
							@@ -1,16 +0,0 @@
 | 
			
		||||
OBJS-$(HAVE_ARMV5TE) += $(ARMV5TE-OBJS) $(ARMV5TE-OBJS-yes)
 | 
			
		||||
OBJS-$(HAVE_ARMV6)   += $(ARMV6-OBJS)   $(ARMV6-OBJS-yes)
 | 
			
		||||
OBJS-$(HAVE_VFP)     += $(VFP-OBJS)     $(VFP-OBJS-yes)
 | 
			
		||||
OBJS-$(HAVE_NEON)    += $(NEON-OBJS)    $(NEON-OBJS-yes)
 | 
			
		||||
 | 
			
		||||
OBJS-$(HAVE_MIPSFPU)   += $(MIPSFPU-OBJS)    $(MIPSFPU-OBJS-yes)
 | 
			
		||||
OBJS-$(HAVE_MIPS32R2)  += $(MIPS32R2-OBJS)   $(MIPS32R2-OBJS-yes)
 | 
			
		||||
OBJS-$(HAVE_MIPSDSPR1) += $(MIPSDSPR1-OBJS)  $(MIPSDSPR1-OBJS-yes)
 | 
			
		||||
OBJS-$(HAVE_MIPSDSPR2) += $(MIPSDSPR2-OBJS)  $(MIPSDSPR2-OBJS-yes)
 | 
			
		||||
 | 
			
		||||
OBJS-$(HAVE_ALTIVEC) += $(ALTIVEC-OBJS) $(ALTIVEC-OBJS-yes)
 | 
			
		||||
 | 
			
		||||
OBJS-$(HAVE_VIS)     += $(VIS-OBJS)     $(VIS-OBJS-yes)
 | 
			
		||||
 | 
			
		||||
OBJS-$(HAVE_MMX)     += $(MMX-OBJS)     $(MMX-OBJS-yes)
 | 
			
		||||
OBJS-$(HAVE_YASM)    += $(YASM-OBJS)    $(YASM-OBJS-yes)
 | 
			
		||||
							
								
								
									
										1963
									
								
								cmdutils.c
									
									
									
									
									
								
							
							
						
						
									
										1963
									
								
								cmdutils.c
									
									
									
									
									
								
							
										
											
												File diff suppressed because it is too large
												Load Diff
											
										
									
								
							
							
								
								
									
										504
									
								
								cmdutils.h
									
									
									
									
									
								
							
							
						
						
									
										504
									
								
								cmdutils.h
									
									
									
									
									
								
							@@ -22,17 +22,11 @@
 | 
			
		||||
#ifndef FFMPEG_CMDUTILS_H
 | 
			
		||||
#define FFMPEG_CMDUTILS_H
 | 
			
		||||
 | 
			
		||||
#include <stdint.h>
 | 
			
		||||
 | 
			
		||||
#include <inttypes.h>
 | 
			
		||||
#include "libavcodec/avcodec.h"
 | 
			
		||||
#include "libavfilter/avfilter.h"
 | 
			
		||||
#include "libavformat/avformat.h"
 | 
			
		||||
#include "libswscale/swscale.h"
 | 
			
		||||
 | 
			
		||||
#ifdef __MINGW32__
 | 
			
		||||
#undef main /* We don't want SDL to override our main() */
 | 
			
		||||
#endif
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * program name, defined by the program for show_version().
 | 
			
		||||
 */
 | 
			
		||||
@@ -43,81 +37,51 @@ extern const char program_name[];
 | 
			
		||||
 */
 | 
			
		||||
extern const int program_birth_year;
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * this year, defined by the program for show_banner()
 | 
			
		||||
 */
 | 
			
		||||
extern const int this_year;
 | 
			
		||||
 | 
			
		||||
extern const char **opt_names;
 | 
			
		||||
extern AVCodecContext *avcodec_opts[AVMEDIA_TYPE_NB];
 | 
			
		||||
extern AVFormatContext *avformat_opts;
 | 
			
		||||
extern struct SwsContext *sws_opts;
 | 
			
		||||
extern struct SwrContext *swr_opts;
 | 
			
		||||
extern AVDictionary *format_opts, *codec_opts;
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Initialize the cmdutils option system, in particular
 | 
			
		||||
 * allocate the *_opts contexts.
 | 
			
		||||
 */
 | 
			
		||||
void init_opts(void);
 | 
			
		||||
/**
 | 
			
		||||
 * Uninitialize the cmdutils option system, in particular
 | 
			
		||||
 * free the *_opts contexts and their contents.
 | 
			
		||||
 */
 | 
			
		||||
void uninit_opts(void);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Trivial log callback.
 | 
			
		||||
 * Only suitable for opt_help and similar since it lacks prefix handling.
 | 
			
		||||
 */
 | 
			
		||||
void log_callback_help(void* ptr, int level, const char* fmt, va_list vl);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Fallback for options that are not explicitly handled, these will be
 | 
			
		||||
 * parsed through AVOptions.
 | 
			
		||||
 */
 | 
			
		||||
int opt_default(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
int opt_default(const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Set the libav* libraries log level.
 | 
			
		||||
 * Sets the libav* libraries log level.
 | 
			
		||||
 */
 | 
			
		||||
int opt_loglevel(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
int opt_report(const char *opt);
 | 
			
		||||
 | 
			
		||||
int opt_max_alloc(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
int opt_cpuflags(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
int opt_codec_debug(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
int opt_loglevel(const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Limit the execution time.
 | 
			
		||||
 */
 | 
			
		||||
int opt_timelimit(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
int opt_timelimit(const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Parse a string and return its corresponding value as a double.
 | 
			
		||||
 * Exit from the application if the string cannot be correctly
 | 
			
		||||
 * Parses a string and returns its corresponding value as a double.
 | 
			
		||||
 * Exits from the application if the string cannot be correctly
 | 
			
		||||
 * parsed or the corresponding value is invalid.
 | 
			
		||||
 *
 | 
			
		||||
 * @param context the context of the value to be set (e.g. the
 | 
			
		||||
 * corresponding command line option name)
 | 
			
		||||
 * corresponding commandline option name)
 | 
			
		||||
 * @param numstr the string to be parsed
 | 
			
		||||
 * @param type the type (OPT_INT64 or OPT_FLOAT) as which the
 | 
			
		||||
 * string should be parsed
 | 
			
		||||
 * @param min the minimum valid accepted value
 | 
			
		||||
 * @param max the maximum valid accepted value
 | 
			
		||||
 */
 | 
			
		||||
double parse_number_or_die(const char *context, const char *numstr, int type,
 | 
			
		||||
                           double min, double max);
 | 
			
		||||
double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Parse a string specifying a time and return its corresponding
 | 
			
		||||
 * value as a number of microseconds. Exit from the application if
 | 
			
		||||
 * Parses a string specifying a time and returns its corresponding
 | 
			
		||||
 * value as a number of microseconds. Exits from the application if
 | 
			
		||||
 * the string cannot be correctly parsed.
 | 
			
		||||
 *
 | 
			
		||||
 * @param context the context of the value to be set (e.g. the
 | 
			
		||||
 * corresponding command line option name)
 | 
			
		||||
 * corresponding commandline option name)
 | 
			
		||||
 * @param timestr the string to be parsed
 | 
			
		||||
 * @param is_duration a flag which tells how to interpret timestr, if
 | 
			
		||||
 * not zero timestr is interpreted as a duration, otherwise as a
 | 
			
		||||
@@ -125,21 +89,9 @@ double parse_number_or_die(const char *context, const char *numstr, int type,
 | 
			
		||||
 *
 | 
			
		||||
 * @see parse_date()
 | 
			
		||||
 */
 | 
			
		||||
int64_t parse_time_or_die(const char *context, const char *timestr,
 | 
			
		||||
                          int is_duration);
 | 
			
		||||
int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration);
 | 
			
		||||
 | 
			
		||||
typedef struct SpecifierOpt {
 | 
			
		||||
    char *specifier;    /**< stream/chapter/program/... specifier */
 | 
			
		||||
    union {
 | 
			
		||||
        uint8_t *str;
 | 
			
		||||
        int        i;
 | 
			
		||||
        int64_t  i64;
 | 
			
		||||
        float      f;
 | 
			
		||||
        double   dbl;
 | 
			
		||||
    } u;
 | 
			
		||||
} SpecifierOpt;
 | 
			
		||||
 | 
			
		||||
typedef struct OptionDef {
 | 
			
		||||
typedef struct {
 | 
			
		||||
    const char *name;
 | 
			
		||||
    int flags;
 | 
			
		||||
#define HAS_ARG    0x0001
 | 
			
		||||
@@ -148,225 +100,42 @@ typedef struct OptionDef {
 | 
			
		||||
#define OPT_STRING 0x0008
 | 
			
		||||
#define OPT_VIDEO  0x0010
 | 
			
		||||
#define OPT_AUDIO  0x0020
 | 
			
		||||
#define OPT_GRAB   0x0040
 | 
			
		||||
#define OPT_INT    0x0080
 | 
			
		||||
#define OPT_FLOAT  0x0100
 | 
			
		||||
#define OPT_SUBTITLE 0x0200
 | 
			
		||||
#define OPT_INT64  0x0400
 | 
			
		||||
#define OPT_EXIT   0x0800
 | 
			
		||||
#define OPT_DATA   0x1000
 | 
			
		||||
#define OPT_PERFILE  0x2000     /* the option is per-file (currently ffmpeg-only).
 | 
			
		||||
                                   implied by OPT_OFFSET or OPT_SPEC */
 | 
			
		||||
#define OPT_OFFSET 0x4000       /* option is specified as an offset in a passed optctx */
 | 
			
		||||
#define OPT_SPEC   0x8000       /* option is to be stored in an array of SpecifierOpt.
 | 
			
		||||
                                   Implies OPT_OFFSET. Next element after the offset is
 | 
			
		||||
                                   an int containing element count in the array. */
 | 
			
		||||
#define OPT_TIME  0x10000
 | 
			
		||||
#define OPT_DOUBLE 0x20000
 | 
			
		||||
#define OPT_FUNC2  0x0400
 | 
			
		||||
#define OPT_INT64  0x0800
 | 
			
		||||
#define OPT_EXIT   0x1000
 | 
			
		||||
     union {
 | 
			
		||||
        void *dst_ptr;
 | 
			
		||||
        int (*func_arg)(void *, const char *, const char *);
 | 
			
		||||
        size_t off;
 | 
			
		||||
        void (*func_arg)(const char *); //FIXME passing error code as int return would be nicer then exit() in the func
 | 
			
		||||
        int *int_arg;
 | 
			
		||||
        char **str_arg;
 | 
			
		||||
        float *float_arg;
 | 
			
		||||
        int (*func2_arg)(const char *, const char *);
 | 
			
		||||
        int64_t *int64_arg;
 | 
			
		||||
    } u;
 | 
			
		||||
    const char *help;
 | 
			
		||||
    const char *argname;
 | 
			
		||||
} OptionDef;
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print help for all options matching specified flags.
 | 
			
		||||
 *
 | 
			
		||||
 * @param options a list of options
 | 
			
		||||
 * @param msg title of this group. Only printed if at least one option matches.
 | 
			
		||||
 * @param req_flags print only options which have all those flags set.
 | 
			
		||||
 * @param rej_flags don't print options which have any of those flags set.
 | 
			
		||||
 * @param alt_flags print only options that have at least one of those flags set
 | 
			
		||||
 */
 | 
			
		||||
void show_help_options(const OptionDef *options, const char *msg, int req_flags,
 | 
			
		||||
                       int rej_flags, int alt_flags);
 | 
			
		||||
void show_help_options(const OptionDef *options, const char *msg, int mask, int value);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Show help for all options with given flags in class and all its
 | 
			
		||||
 * children.
 | 
			
		||||
 */
 | 
			
		||||
void show_help_children(const AVClass *class, int flags);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Per-fftool specific help handler. Implemented in each
 | 
			
		||||
 * fftool, called by show_help().
 | 
			
		||||
 */
 | 
			
		||||
void show_help_default(const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Generic -h handler common to all fftools.
 | 
			
		||||
 */
 | 
			
		||||
int show_help(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Parse the command line arguments.
 | 
			
		||||
 *
 | 
			
		||||
 * @param optctx an opaque options context
 | 
			
		||||
 * @param argc   number of command line arguments
 | 
			
		||||
 * @param argv   values of command line arguments
 | 
			
		||||
 * Parses the command line arguments.
 | 
			
		||||
 * @param options Array with the definitions required to interpret every
 | 
			
		||||
 * option of the form: -option_name [argument]
 | 
			
		||||
 * option of the form: -<option_name> [<argument>]
 | 
			
		||||
 * @param parse_arg_function Name of the function called to process every
 | 
			
		||||
 * argument without a leading option name flag. NULL if such arguments do
 | 
			
		||||
 * not have to be processed.
 | 
			
		||||
 */
 | 
			
		||||
void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
 | 
			
		||||
                   void (* parse_arg_function)(void *optctx, const char*));
 | 
			
		||||
void parse_options(int argc, char **argv, const OptionDef *options,
 | 
			
		||||
                   void (* parse_arg_function)(const char*));
 | 
			
		||||
 | 
			
		||||
void set_context_opts(void *ctx, void *opts_ctx, int flags);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Parse one given option.
 | 
			
		||||
 *
 | 
			
		||||
 * @return on success 1 if arg was consumed, 0 otherwise; negative number on error
 | 
			
		||||
 */
 | 
			
		||||
int parse_option(void *optctx, const char *opt, const char *arg,
 | 
			
		||||
                 const OptionDef *options);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * An option extracted from the commandline.
 | 
			
		||||
 * Cannot use AVDictionary because of options like -map which can be
 | 
			
		||||
 * used multiple times.
 | 
			
		||||
 */
 | 
			
		||||
typedef struct Option {
 | 
			
		||||
    const OptionDef  *opt;
 | 
			
		||||
    const char       *key;
 | 
			
		||||
    const char       *val;
 | 
			
		||||
} Option;
 | 
			
		||||
 | 
			
		||||
typedef struct OptionGroupDef {
 | 
			
		||||
    /**< group name */
 | 
			
		||||
    const char *name;
 | 
			
		||||
    /**
 | 
			
		||||
     * Option to be used as group separator. Can be NULL for groups which
 | 
			
		||||
     * are terminated by a non-option argument (e.g. ffmpeg output files)
 | 
			
		||||
     */
 | 
			
		||||
    const char *sep;
 | 
			
		||||
} OptionGroupDef;
 | 
			
		||||
 | 
			
		||||
typedef struct OptionGroup {
 | 
			
		||||
    const OptionGroupDef *group_def;
 | 
			
		||||
    const char *arg;
 | 
			
		||||
 | 
			
		||||
    Option *opts;
 | 
			
		||||
    int  nb_opts;
 | 
			
		||||
 | 
			
		||||
    AVDictionary *codec_opts;
 | 
			
		||||
    AVDictionary *format_opts;
 | 
			
		||||
    struct SwsContext *sws_opts;
 | 
			
		||||
    struct SwrContext *swr_opts;
 | 
			
		||||
} OptionGroup;
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * A list of option groups that all have the same group type
 | 
			
		||||
 * (e.g. input files or output files)
 | 
			
		||||
 */
 | 
			
		||||
typedef struct OptionGroupList {
 | 
			
		||||
    const OptionGroupDef *group_def;
 | 
			
		||||
 | 
			
		||||
    OptionGroup *groups;
 | 
			
		||||
    int       nb_groups;
 | 
			
		||||
} OptionGroupList;
 | 
			
		||||
 | 
			
		||||
typedef struct OptionParseContext {
 | 
			
		||||
    OptionGroup global_opts;
 | 
			
		||||
 | 
			
		||||
    OptionGroupList *groups;
 | 
			
		||||
    int           nb_groups;
 | 
			
		||||
 | 
			
		||||
    /* parsing state */
 | 
			
		||||
    OptionGroup cur_group;
 | 
			
		||||
} OptionParseContext;
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Parse an options group and write results into optctx.
 | 
			
		||||
 *
 | 
			
		||||
 * @param optctx an app-specific options context. NULL for global options group
 | 
			
		||||
 */
 | 
			
		||||
int parse_optgroup(void *optctx, OptionGroup *g);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Split the commandline into an intermediate form convenient for further
 | 
			
		||||
 * processing.
 | 
			
		||||
 *
 | 
			
		||||
 * The commandline is assumed to be composed of options which either belong to a
 | 
			
		||||
 * group (those with OPT_SPEC, OPT_OFFSET or OPT_PERFILE) or are global
 | 
			
		||||
 * (everything else).
 | 
			
		||||
 *
 | 
			
		||||
 * A group (defined by an OptionGroupDef struct) is a sequence of options
 | 
			
		||||
 * terminated by either a group separator option (e.g. -i) or a parameter that
 | 
			
		||||
 * is not an option (doesn't start with -). A group without a separator option
 | 
			
		||||
 * must always be first in the supplied groups list.
 | 
			
		||||
 *
 | 
			
		||||
 * All options within the same group are stored in one OptionGroup struct in an
 | 
			
		||||
 * OptionGroupList, all groups with the same group definition are stored in one
 | 
			
		||||
 * OptionGroupList in OptionParseContext.groups. The order of group lists is the
 | 
			
		||||
 * same as the order of group definitions.
 | 
			
		||||
 */
 | 
			
		||||
int split_commandline(OptionParseContext *octx, int argc, char *argv[],
 | 
			
		||||
                      const OptionDef *options,
 | 
			
		||||
                      const OptionGroupDef *groups, int nb_groups);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Free all allocated memory in an OptionParseContext.
 | 
			
		||||
 */
 | 
			
		||||
void uninit_parse_context(OptionParseContext *octx);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Find the '-loglevel' option in the command line args and apply it.
 | 
			
		||||
 */
 | 
			
		||||
void parse_loglevel(int argc, char **argv, const OptionDef *options);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Return index of option opt in argv or 0 if not found.
 | 
			
		||||
 */
 | 
			
		||||
int locate_option(int argc, char **argv, const OptionDef *options,
 | 
			
		||||
                  const char *optname);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Check if the given stream matches a stream specifier.
 | 
			
		||||
 *
 | 
			
		||||
 * @param s  Corresponding format context.
 | 
			
		||||
 * @param st Stream from s to be checked.
 | 
			
		||||
 * @param spec A stream specifier of the [v|a|s|d]:[\<stream index\>] form.
 | 
			
		||||
 *
 | 
			
		||||
 * @return 1 if the stream matches, 0 if it doesn't, <0 on error
 | 
			
		||||
 */
 | 
			
		||||
int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Filter out options for given codec.
 | 
			
		||||
 *
 | 
			
		||||
 * Create a new options dictionary containing only the options from
 | 
			
		||||
 * opts which apply to the codec with ID codec_id.
 | 
			
		||||
 *
 | 
			
		||||
 * @param opts     dictionary to place options in
 | 
			
		||||
 * @param codec_id ID of the codec that should be filtered for
 | 
			
		||||
 * @param s Corresponding format context.
 | 
			
		||||
 * @param st A stream from s for which the options should be filtered.
 | 
			
		||||
 * @param codec The particular codec for which the options should be filtered.
 | 
			
		||||
 *              If null, the default one is looked up according to the codec id.
 | 
			
		||||
 * @return a pointer to the created dictionary
 | 
			
		||||
 */
 | 
			
		||||
AVDictionary *filter_codec_opts(AVDictionary *opts, enum AVCodecID codec_id,
 | 
			
		||||
                                AVFormatContext *s, AVStream *st, AVCodec *codec);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Setup AVCodecContext options for avformat_find_stream_info().
 | 
			
		||||
 *
 | 
			
		||||
 * Create an array of dictionaries, one dictionary for each stream
 | 
			
		||||
 * contained in s.
 | 
			
		||||
 * Each dictionary will contain the options from codec_opts which can
 | 
			
		||||
 * be applied to the corresponding stream codec context.
 | 
			
		||||
 *
 | 
			
		||||
 * @return pointer to the created array of dictionaries, NULL if it
 | 
			
		||||
 * cannot be created
 | 
			
		||||
 */
 | 
			
		||||
AVDictionary **setup_find_stream_info_opts(AVFormatContext *s,
 | 
			
		||||
                                           AVDictionary *codec_opts);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print an error message to stderr, indicating filename and a human
 | 
			
		||||
 * Prints an error message to stderr, indicating filename and a human
 | 
			
		||||
 * readable description of the error code err.
 | 
			
		||||
 *
 | 
			
		||||
 * If strerror_r() is not available the use of this function in a
 | 
			
		||||
@@ -376,208 +145,79 @@ AVDictionary **setup_find_stream_info_opts(AVFormatContext *s,
 | 
			
		||||
 */
 | 
			
		||||
void print_error(const char *filename, int err);
 | 
			
		||||
 | 
			
		||||
void list_fmts(void (*get_fmt_string)(char *buf, int buf_size, int fmt), int nb_fmts);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print the program banner to stderr. The banner contents depend on the
 | 
			
		||||
 * Prints the program banner to stderr. The banner contents depend on the
 | 
			
		||||
 * current version of the repository and of the libav* libraries used by
 | 
			
		||||
 * the program.
 | 
			
		||||
 */
 | 
			
		||||
void show_banner(int argc, char **argv, const OptionDef *options);
 | 
			
		||||
void show_banner(void);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print the version of the program to stdout. The version message
 | 
			
		||||
 * Prints the version of the program to stdout. The version message
 | 
			
		||||
 * depends on the current versions of the repository and of the libav*
 | 
			
		||||
 * libraries.
 | 
			
		||||
 * This option processing function does not utilize the arguments.
 | 
			
		||||
 */
 | 
			
		||||
int show_version(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
void show_version(void);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print the license of the program to stdout. The license depends on
 | 
			
		||||
 * Prints the license of the program to stdout. The license depends on
 | 
			
		||||
 * the license of the libraries compiled into the program.
 | 
			
		||||
 * This option processing function does not utilize the arguments.
 | 
			
		||||
 */
 | 
			
		||||
int show_license(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
void show_license(void);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print a listing containing all the formats supported by the
 | 
			
		||||
 * program.
 | 
			
		||||
 * This option processing function does not utilize the arguments.
 | 
			
		||||
 */
 | 
			
		||||
int show_formats(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print a listing containing all the codecs supported by the
 | 
			
		||||
 * program.
 | 
			
		||||
 * This option processing function does not utilize the arguments.
 | 
			
		||||
 */
 | 
			
		||||
int show_codecs(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print a listing containing all the decoders supported by the
 | 
			
		||||
 * Prints a listing containing all the formats supported by the
 | 
			
		||||
 * program.
 | 
			
		||||
 */
 | 
			
		||||
int show_decoders(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
void show_formats(void);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print a listing containing all the encoders supported by the
 | 
			
		||||
 * Prints a listing containing all the codecs supported by the
 | 
			
		||||
 * program.
 | 
			
		||||
 */
 | 
			
		||||
int show_encoders(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
void show_codecs(void);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print a listing containing all the filters supported by the
 | 
			
		||||
 * program.
 | 
			
		||||
 * This option processing function does not utilize the arguments.
 | 
			
		||||
 */
 | 
			
		||||
int show_filters(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print a listing containing all the bit stream filters supported by the
 | 
			
		||||
 * program.
 | 
			
		||||
 * This option processing function does not utilize the arguments.
 | 
			
		||||
 */
 | 
			
		||||
int show_bsfs(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print a listing containing all the protocols supported by the
 | 
			
		||||
 * program.
 | 
			
		||||
 * This option processing function does not utilize the arguments.
 | 
			
		||||
 */
 | 
			
		||||
int show_protocols(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print a listing containing all the pixel formats supported by the
 | 
			
		||||
 * program.
 | 
			
		||||
 * This option processing function does not utilize the arguments.
 | 
			
		||||
 */
 | 
			
		||||
int show_pix_fmts(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print a listing containing all the standard channel layouts supported by
 | 
			
		||||
 * the program.
 | 
			
		||||
 * This option processing function does not utilize the arguments.
 | 
			
		||||
 */
 | 
			
		||||
int show_layouts(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Print a listing containing all the sample formats supported by the
 | 
			
		||||
 * Prints a listing containing all the filters supported by the
 | 
			
		||||
 * program.
 | 
			
		||||
 */
 | 
			
		||||
int show_sample_fmts(void *optctx, const char *opt, const char *arg);
 | 
			
		||||
void show_filters(void);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Return a positive value if a line read from standard input
 | 
			
		||||
 * starts with [yY], otherwise return 0.
 | 
			
		||||
 * Prints a listing containing all the bit stream filters supported by the
 | 
			
		||||
 * program.
 | 
			
		||||
 */
 | 
			
		||||
void show_bsfs(void);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Prints a listing containing all the protocols supported by the
 | 
			
		||||
 * program.
 | 
			
		||||
 */
 | 
			
		||||
void show_protocols(void);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Prints a listing containing all the pixel formats supported by the
 | 
			
		||||
 * program.
 | 
			
		||||
 */
 | 
			
		||||
void show_pix_fmts(void);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Returns a positive value if reads from standard input a line
 | 
			
		||||
 * starting with [yY], otherwise returns 0.
 | 
			
		||||
 */
 | 
			
		||||
int read_yesno(void);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Read the file with name filename, and put its content in a newly
 | 
			
		||||
 * Reads the file with name filename, and puts its content in a newly
 | 
			
		||||
 * allocated 0-terminated buffer.
 | 
			
		||||
 *
 | 
			
		||||
 * @param filename file to read from
 | 
			
		||||
 * @param bufptr location where pointer to buffer is returned
 | 
			
		||||
 * @param size   location where size of buffer is returned
 | 
			
		||||
 * @param bufptr puts here the pointer to the newly allocated buffer
 | 
			
		||||
 * @param size puts here the size of the newly allocated buffer
 | 
			
		||||
 * @return 0 in case of success, a negative value corresponding to an
 | 
			
		||||
 * AVERROR error code in case of failure.
 | 
			
		||||
 */
 | 
			
		||||
int cmdutils_read_file(const char *filename, char **bufptr, size_t *size);
 | 
			
		||||
int read_file(const char *filename, char **bufptr, size_t *size);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Get a file corresponding to a preset file.
 | 
			
		||||
 *
 | 
			
		||||
 * If is_path is non-zero, look for the file in the path preset_name.
 | 
			
		||||
 * Otherwise search for a file named arg.ffpreset in the directories
 | 
			
		||||
 * $FFMPEG_DATADIR (if set), $HOME/.ffmpeg, and in the datadir defined
 | 
			
		||||
 * at configuration time or in a "ffpresets" folder along the executable
 | 
			
		||||
 * on win32, in that order. If no such file is found and
 | 
			
		||||
 * codec_name is defined, then search for a file named
 | 
			
		||||
 * codec_name-preset_name.avpreset in the above-mentioned directories.
 | 
			
		||||
 *
 | 
			
		||||
 * @param filename buffer where the name of the found filename is written
 | 
			
		||||
 * @param filename_size size in bytes of the filename buffer
 | 
			
		||||
 * @param preset_name name of the preset to search
 | 
			
		||||
 * @param is_path tell if preset_name is a filename path
 | 
			
		||||
 * @param codec_name name of the codec for which to look for the
 | 
			
		||||
 * preset, may be NULL
 | 
			
		||||
 */
 | 
			
		||||
FILE *get_preset_file(char *filename, size_t filename_size,
 | 
			
		||||
                      const char *preset_name, int is_path, const char *codec_name);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Realloc array to hold new_size elements of elem_size.
 | 
			
		||||
 * Calls exit() on failure.
 | 
			
		||||
 *
 | 
			
		||||
 * @param array array to reallocate
 | 
			
		||||
 * @param elem_size size in bytes of each element
 | 
			
		||||
 * @param size new element count will be written here
 | 
			
		||||
 * @param new_size number of elements to place in reallocated array
 | 
			
		||||
 * @return reallocated array
 | 
			
		||||
 */
 | 
			
		||||
void *grow_array(void *array, int elem_size, int *size, int new_size);
 | 
			
		||||
 | 
			
		||||
#define GROW_ARRAY(array, nb_elems)\
 | 
			
		||||
    array = grow_array(array, sizeof(*array), &nb_elems, nb_elems + 1)
 | 
			
		||||
 | 
			
		||||
typedef struct FrameBuffer {
 | 
			
		||||
    uint8_t *base[4];
 | 
			
		||||
    uint8_t *data[4];
 | 
			
		||||
    int  linesize[4];
 | 
			
		||||
 | 
			
		||||
    int h, w;
 | 
			
		||||
    enum AVPixelFormat pix_fmt;
 | 
			
		||||
 | 
			
		||||
    int refcount;
 | 
			
		||||
    struct FrameBuffer **pool;  ///< head of the buffer pool
 | 
			
		||||
    struct FrameBuffer *next;
 | 
			
		||||
} FrameBuffer;
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Get a frame from the pool. This is intended to be used as a callback for
 | 
			
		||||
 * AVCodecContext.get_buffer.
 | 
			
		||||
 *
 | 
			
		||||
 * @param s codec context. s->opaque must be a pointer to the head of the
 | 
			
		||||
 *          buffer pool.
 | 
			
		||||
 * @param frame frame->opaque will be set to point to the FrameBuffer
 | 
			
		||||
 *              containing the frame data.
 | 
			
		||||
 */
 | 
			
		||||
int codec_get_buffer(AVCodecContext *s, AVFrame *frame);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * A callback to be used for AVCodecContext.release_buffer along with
 | 
			
		||||
 * codec_get_buffer().
 | 
			
		||||
 */
 | 
			
		||||
void codec_release_buffer(AVCodecContext *s, AVFrame *frame);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * A callback to be used for AVFilterBuffer.free.
 | 
			
		||||
 * @param fb buffer to free. fb->priv must be a pointer to the FrameBuffer
 | 
			
		||||
 *           containing the buffer data.
 | 
			
		||||
 */
 | 
			
		||||
void filter_release_buffer(AVFilterBuffer *fb);
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Free all the buffers in the pool. This must be called after all the
 | 
			
		||||
 * buffers have been released.
 | 
			
		||||
 */
 | 
			
		||||
void free_buffer_pool(FrameBuffer **pool);
 | 
			
		||||
 | 
			
		||||
#define GET_PIX_FMT_NAME(pix_fmt)\
 | 
			
		||||
    const char *name = av_get_pix_fmt_name(pix_fmt);
 | 
			
		||||
 | 
			
		||||
#define GET_SAMPLE_FMT_NAME(sample_fmt)\
 | 
			
		||||
    const char *name = av_get_sample_fmt_name(sample_fmt)
 | 
			
		||||
 | 
			
		||||
#define GET_SAMPLE_RATE_NAME(rate)\
 | 
			
		||||
    char name[16];\
 | 
			
		||||
    snprintf(name, sizeof(name), "%d", rate);
 | 
			
		||||
 | 
			
		||||
#define GET_CH_LAYOUT_NAME(ch_layout)\
 | 
			
		||||
    char name[16];\
 | 
			
		||||
    snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout);
 | 
			
		||||
 | 
			
		||||
#define GET_CH_LAYOUT_DESC(ch_layout)\
 | 
			
		||||
    char name[128];\
 | 
			
		||||
    av_get_channel_layout_string(name, sizeof(name), 0, ch_layout);
 | 
			
		||||
 | 
			
		||||
#endif /* CMDUTILS_H */
 | 
			
		||||
#endif /* FFMPEG_CMDUTILS_H */
 | 
			
		||||
 
 | 
			
		||||
@@ -1,21 +1,13 @@
 | 
			
		||||
    { "L"          , OPT_EXIT, {.func_arg = show_license},      "show license" },
 | 
			
		||||
    { "h"          , OPT_EXIT, {.func_arg = show_help},         "show help", "topic" },
 | 
			
		||||
    { "?"          , OPT_EXIT, {.func_arg = show_help},         "show help", "topic" },
 | 
			
		||||
    { "help"       , OPT_EXIT, {.func_arg = show_help},         "show help", "topic" },
 | 
			
		||||
    { "-help"      , OPT_EXIT, {.func_arg = show_help},         "show help", "topic" },
 | 
			
		||||
    { "version"    , OPT_EXIT, {.func_arg = show_version},      "show version" },
 | 
			
		||||
    { "formats"    , OPT_EXIT, {.func_arg = show_formats  },    "show available formats" },
 | 
			
		||||
    { "codecs"     , OPT_EXIT, {.func_arg = show_codecs   },    "show available codecs" },
 | 
			
		||||
    { "decoders"   , OPT_EXIT, {.func_arg = show_decoders },    "show available decoders" },
 | 
			
		||||
    { "encoders"   , OPT_EXIT, {.func_arg = show_encoders },    "show available encoders" },
 | 
			
		||||
    { "bsfs"       , OPT_EXIT, {.func_arg = show_bsfs     },    "show available bit stream filters" },
 | 
			
		||||
    { "protocols"  , OPT_EXIT, {.func_arg = show_protocols},    "show available protocols" },
 | 
			
		||||
    { "filters"    , OPT_EXIT, {.func_arg = show_filters  },    "show available filters" },
 | 
			
		||||
    { "pix_fmts"   , OPT_EXIT, {.func_arg = show_pix_fmts },    "show available pixel formats" },
 | 
			
		||||
    { "layouts"    , OPT_EXIT, {.func_arg = show_layouts  },    "show standard channel layouts" },
 | 
			
		||||
    { "sample_fmts", OPT_EXIT, {.func_arg = show_sample_fmts }, "show available audio sample formats" },
 | 
			
		||||
    { "loglevel"   , HAS_ARG,  {.func_arg = opt_loglevel},      "set libav* logging level", "loglevel" },
 | 
			
		||||
    { "v",           HAS_ARG,  {.func_arg = opt_loglevel},      "set libav* logging level", "loglevel" },
 | 
			
		||||
    { "report"     , 0,        {(void*)opt_report}, "generate a report" },
 | 
			
		||||
    { "max_alloc"  , HAS_ARG,  {.func_arg = opt_max_alloc},     "set maximum size of a single allocated block", "bytes" },
 | 
			
		||||
    { "cpuflags"   , HAS_ARG | OPT_EXPERT, {.func_arg = opt_cpuflags}, "force specific cpu flags", "flags" },
 | 
			
		||||
    { "L", OPT_EXIT, {(void*)show_license}, "show license" },
 | 
			
		||||
    { "h", OPT_EXIT, {(void*)show_help}, "show help" },
 | 
			
		||||
    { "?", OPT_EXIT, {(void*)show_help}, "show help" },
 | 
			
		||||
    { "help", OPT_EXIT, {(void*)show_help}, "show help" },
 | 
			
		||||
    { "-help", OPT_EXIT, {(void*)show_help}, "show help" },
 | 
			
		||||
    { "version", OPT_EXIT, {(void*)show_version}, "show version" },
 | 
			
		||||
    { "formats"  , OPT_EXIT, {(void*)show_formats  }, "show available formats" },
 | 
			
		||||
    { "codecs"   , OPT_EXIT, {(void*)show_codecs   }, "show available codecs" },
 | 
			
		||||
    { "bsfs"     , OPT_EXIT, {(void*)show_bsfs     }, "show available bit stream filters" },
 | 
			
		||||
    { "protocols", OPT_EXIT, {(void*)show_protocols}, "show available protocols" },
 | 
			
		||||
    { "filters",   OPT_EXIT, {(void*)show_filters  }, "show available filters" },
 | 
			
		||||
    { "pix_fmts" , OPT_EXIT, {(void*)show_pix_fmts }, "show available pixel formats" },
 | 
			
		||||
    { "loglevel", HAS_ARG | OPT_FUNC2, {(void*)opt_loglevel}, "set libav* logging level", "loglevel" },
 | 
			
		||||
 
 | 
			
		||||
							
								
								
									
										135
									
								
								common.mak
									
									
									
									
									
								
							
							
						
						
									
										135
									
								
								common.mak
									
									
									
									
									
								
							@@ -6,70 +6,60 @@
 | 
			
		||||
all: all-yes
 | 
			
		||||
 | 
			
		||||
ifndef SUBDIR
 | 
			
		||||
vpath %.c   $(SRC_DIR)
 | 
			
		||||
vpath %.h   $(SRC_DIR)
 | 
			
		||||
vpath %.S   $(SRC_DIR)
 | 
			
		||||
vpath %.asm $(SRC_DIR)
 | 
			
		||||
vpath %.v   $(SRC_DIR)
 | 
			
		||||
 | 
			
		||||
ifeq ($(SRC_DIR),$(SRC_PATH_BARE))
 | 
			
		||||
BUILD_ROOT_REL = .
 | 
			
		||||
else
 | 
			
		||||
BUILD_ROOT_REL = ..
 | 
			
		||||
endif
 | 
			
		||||
 | 
			
		||||
ifndef V
 | 
			
		||||
Q      = @
 | 
			
		||||
ECHO   = printf "$(1)\t%s\n" $(2)
 | 
			
		||||
BRIEF  = CC CXX HOSTCC HOSTLD AS YASM AR LD STRIP CP
 | 
			
		||||
SILENT = DEPCC DEPHOSTCC DEPAS DEPYASM RANLIB RM
 | 
			
		||||
 | 
			
		||||
BRIEF  = CC AS YASM AR LD HOSTCC STRIP CP
 | 
			
		||||
SILENT = DEPCC YASMDEP RM RANLIB
 | 
			
		||||
MSG    = $@
 | 
			
		||||
M      = @$(call ECHO,$(TAG),$@);
 | 
			
		||||
$(foreach VAR,$(BRIEF), \
 | 
			
		||||
    $(eval override $(VAR) = @$$(call ECHO,$(VAR),$$(MSG)); $($(VAR))))
 | 
			
		||||
$(foreach VAR,$(SILENT),$(eval override $(VAR) = @$($(VAR))))
 | 
			
		||||
    $(eval $(VAR) = @$$(call ECHO,$(VAR),$$(MSG)); $($(VAR))))
 | 
			
		||||
$(foreach VAR,$(SILENT),$(eval $(VAR) = @$($(VAR))))
 | 
			
		||||
$(eval INSTALL = @$(call ECHO,INSTALL,$$(^:$(SRC_DIR)/%=%)); $(INSTALL))
 | 
			
		||||
endif
 | 
			
		||||
 | 
			
		||||
ALLFFLIBS = avcodec avdevice avfilter avformat avresample avutil postproc swscale swresample
 | 
			
		||||
ALLFFLIBS = avcodec avdevice avfilter avformat avutil postproc swscale
 | 
			
		||||
 | 
			
		||||
# NASM requires -I path terminated with /
 | 
			
		||||
IFLAGS     := -I. -I$(SRC_PATH)/
 | 
			
		||||
CPPFLAGS   := $(IFLAGS) $(CPPFLAGS)
 | 
			
		||||
CFLAGS     += $(ECFLAGS)
 | 
			
		||||
CCFLAGS     = $(CPPFLAGS) $(CFLAGS)
 | 
			
		||||
ASFLAGS    := $(CPPFLAGS) $(ASFLAGS)
 | 
			
		||||
CXXFLAGS   += $(CPPFLAGS) $(CFLAGS)
 | 
			
		||||
YASMFLAGS  += $(IFLAGS:%=%/) -Pconfig.asm
 | 
			
		||||
 | 
			
		||||
HOSTCCFLAGS = $(IFLAGS) $(HOSTCFLAGS)
 | 
			
		||||
LDFLAGS    := $(ALLFFLIBS:%=$(LD_PATH)lib%) $(LDFLAGS)
 | 
			
		||||
 | 
			
		||||
define COMPILE
 | 
			
		||||
       $(call $(1)DEP,$(1))
 | 
			
		||||
       $($(1)) $($(1)FLAGS) $($(1)_DEPFLAGS) $($(1)_C) $($(1)_O) $<
 | 
			
		||||
endef
 | 
			
		||||
 | 
			
		||||
COMPILE_C = $(call COMPILE,CC)
 | 
			
		||||
COMPILE_CXX = $(call COMPILE,CXX)
 | 
			
		||||
COMPILE_S = $(call COMPILE,AS)
 | 
			
		||||
CPPFLAGS := -I$(BUILD_ROOT_REL) -I$(SRC_PATH) $(CPPFLAGS)
 | 
			
		||||
CFLAGS   += $(ECFLAGS)
 | 
			
		||||
 | 
			
		||||
%.o: %.c
 | 
			
		||||
	$(COMPILE_C)
 | 
			
		||||
 | 
			
		||||
%.o: %.cpp
 | 
			
		||||
	$(COMPILE_CXX)
 | 
			
		||||
 | 
			
		||||
%.s: %.c
 | 
			
		||||
	$(CC) $(CPPFLAGS) $(CFLAGS) -S -o $@ $<
 | 
			
		||||
	$(CCDEP)
 | 
			
		||||
	$(CC) $(CPPFLAGS) $(CFLAGS) $(CC_DEPFLAGS) -c $(CC_O) $<
 | 
			
		||||
 | 
			
		||||
%.o: %.S
 | 
			
		||||
	$(COMPILE_S)
 | 
			
		||||
	$(ASDEP)
 | 
			
		||||
	$(AS) $(CPPFLAGS) $(ASFLAGS) $(AS_DEPFLAGS) -c -o $@ $<
 | 
			
		||||
 | 
			
		||||
%.i: %.c
 | 
			
		||||
	$(CC) $(CCFLAGS) $(CC_E) $<
 | 
			
		||||
%.ho: %.h
 | 
			
		||||
	$(CC) $(CPPFLAGS) $(CFLAGS) -Wno-unused -c -o $@ -x c $<
 | 
			
		||||
 | 
			
		||||
%.h.c:
 | 
			
		||||
	$(Q)echo '#include "$*.h"' >$@
 | 
			
		||||
%$(EXESUF): %.c
 | 
			
		||||
 | 
			
		||||
%.ver: %.v
 | 
			
		||||
	$(Q)sed 's/$$MAJOR/$($(basename $(@F))_VERSION_MAJOR)/' $^ > $@
 | 
			
		||||
 | 
			
		||||
%.c %.h: TAG = GEN
 | 
			
		||||
 | 
			
		||||
# Dummy rule to stop make trying to rebuild removed or renamed headers
 | 
			
		||||
%.h:
 | 
			
		||||
	@:
 | 
			
		||||
install: install-libs install-headers
 | 
			
		||||
install-libs: install-libs-yes
 | 
			
		||||
 | 
			
		||||
uninstall: uninstall-libs uninstall-headers
 | 
			
		||||
 | 
			
		||||
.PHONY: all depend dep *clean install* uninstall* examples testprogs
 | 
			
		||||
 | 
			
		||||
# Disable suffix rules.  Most of the builtin rules are suffix rules,
 | 
			
		||||
# so this saves some time on slow systems.
 | 
			
		||||
@@ -79,62 +69,41 @@ COMPILE_S = $(call COMPILE,AS)
 | 
			
		||||
$(OBJS):
 | 
			
		||||
endif
 | 
			
		||||
 | 
			
		||||
include $(SRC_PATH)/arch.mak
 | 
			
		||||
OBJS-$(HAVE_MMX) +=  $(MMX-OBJS-yes)
 | 
			
		||||
 | 
			
		||||
CFLAGS    += $(CFLAGS-yes)
 | 
			
		||||
OBJS      += $(OBJS-yes)
 | 
			
		||||
FFLIBS    := $(FFLIBS-yes) $(FFLIBS)
 | 
			
		||||
TESTPROGS += $(TESTPROGS-yes)
 | 
			
		||||
 | 
			
		||||
LDLIBS       = $(FFLIBS:%=%$(BUILDSUF))
 | 
			
		||||
FFEXTRALIBS := $(LDLIBS:%=$(LD_LIB)) $(EXTRALIBS)
 | 
			
		||||
FFEXTRALIBS := $(addprefix -l,$(addsuffix $(BUILDSUF),$(FFLIBS))) $(EXTRALIBS)
 | 
			
		||||
FFLDFLAGS   := $(addprefix -L$(BUILD_ROOT)/lib,$(ALLFFLIBS)) $(LDFLAGS)
 | 
			
		||||
 | 
			
		||||
EXAMPLES  := $(EXAMPLES:%=$(SUBDIR)%-example$(EXESUF))
 | 
			
		||||
OBJS      := $(sort $(OBJS:%=$(SUBDIR)%))
 | 
			
		||||
TESTOBJS  := $(TESTOBJS:%=$(SUBDIR)%) $(TESTPROGS:%=$(SUBDIR)%-test.o)
 | 
			
		||||
TESTPROGS := $(TESTPROGS:%=$(SUBDIR)%-test$(EXESUF))
 | 
			
		||||
HOSTOBJS  := $(HOSTPROGS:%=$(SUBDIR)%.o)
 | 
			
		||||
HOSTPROGS := $(HOSTPROGS:%=$(SUBDIR)%$(HOSTEXESUF))
 | 
			
		||||
TOOLS     += $(TOOLS-yes)
 | 
			
		||||
TOOLOBJS  := $(TOOLS:%=tools/%.o)
 | 
			
		||||
TOOLS     := $(TOOLS:%=tools/%$(EXESUF))
 | 
			
		||||
HEADERS   += $(HEADERS-yes)
 | 
			
		||||
EXAMPLES  := $(addprefix $(SUBDIR),$(addsuffix -example$(EXESUF),$(EXAMPLES)))
 | 
			
		||||
OBJS      := $(addprefix $(SUBDIR),$(sort $(OBJS)))
 | 
			
		||||
TESTOBJS  := $(addprefix $(SUBDIR),$(TESTOBJS))
 | 
			
		||||
TESTPROGS := $(addprefix $(SUBDIR),$(addsuffix -test$(EXESUF),$(TESTPROGS)))
 | 
			
		||||
HOSTOBJS  := $(addprefix $(SUBDIR),$(addsuffix .o,$(HOSTPROGS)))
 | 
			
		||||
HOSTPROGS := $(addprefix $(SUBDIR),$(addsuffix $(HOSTEXESUF),$(HOSTPROGS)))
 | 
			
		||||
 | 
			
		||||
DEP_LIBS := $(foreach NAME,$(FFLIBS),lib$(NAME)/$($(CONFIG_SHARED:yes=S)LIBNAME))
 | 
			
		||||
DEP_LIBS := $(foreach NAME,$(FFLIBS),$(BUILD_ROOT_REL)/lib$(NAME)/$($(CONFIG_SHARED:yes=S)LIBNAME))
 | 
			
		||||
 | 
			
		||||
ALLHEADERS := $(subst $(SRC_DIR)/,$(SUBDIR),$(wildcard $(SRC_DIR)/*.h $(SRC_DIR)/$(ARCH)/*.h))
 | 
			
		||||
SKIPHEADERS += $(ARCH_HEADERS:%=$(ARCH)/%) $(SKIPHEADERS-)
 | 
			
		||||
SKIPHEADERS := $(SKIPHEADERS:%=$(SUBDIR)%)
 | 
			
		||||
HOBJS        = $(filter-out $(SKIPHEADERS:.h=.h.o),$(ALLHEADERS:.h=.h.o))
 | 
			
		||||
checkheaders: $(HOBJS)
 | 
			
		||||
.SECONDARY:   $(HOBJS:.o=.c)
 | 
			
		||||
 | 
			
		||||
alltools: $(TOOLS)
 | 
			
		||||
SKIPHEADERS += $(addprefix $(ARCH)/,$(ARCH_HEADERS))
 | 
			
		||||
SKIPHEADERS := $(addprefix $(SUBDIR),$(SKIPHEADERS-) $(SKIPHEADERS))
 | 
			
		||||
checkheaders: $(filter-out $(SKIPHEADERS:.h=.ho),$(ALLHEADERS:.h=.ho))
 | 
			
		||||
 | 
			
		||||
$(HOSTOBJS): %.o: %.c
 | 
			
		||||
	$(call COMPILE,HOSTCC)
 | 
			
		||||
	$(HOSTCC) $(HOSTCFLAGS) -c -o $@ $<
 | 
			
		||||
 | 
			
		||||
$(HOSTPROGS): %$(HOSTEXESUF): %.o
 | 
			
		||||
	$(HOSTLD) $(HOSTLDFLAGS) $(HOSTLD_O) $< $(HOSTLIBS)
 | 
			
		||||
	$(HOSTCC) $(HOSTLDFLAGS) -o $@ $< $(HOSTLIBS)
 | 
			
		||||
 | 
			
		||||
$(OBJS):     | $(sort $(dir $(OBJS)))
 | 
			
		||||
$(HOSTOBJS): | $(sort $(dir $(HOSTOBJS)))
 | 
			
		||||
$(TESTOBJS): | $(sort $(dir $(TESTOBJS)))
 | 
			
		||||
$(HOBJS):    | $(sort $(dir $(HOBJS)))
 | 
			
		||||
$(TOOLOBJS): | tools
 | 
			
		||||
DEPS := $(OBJS:.o=.d)
 | 
			
		||||
depend dep: $(DEPS)
 | 
			
		||||
 | 
			
		||||
OBJDIRS := $(OBJDIRS) $(dir $(OBJS) $(HOSTOBJS) $(TESTOBJS) $(HOBJS))
 | 
			
		||||
 | 
			
		||||
CLEANSUFFIXES     = *.d *.o *~ *.h.c *.map *.ver *.ho *.gcno *.gcda
 | 
			
		||||
CLEANSUFFIXES     = *.d *.o *~ *.ho *.map *.ver
 | 
			
		||||
DISTCLEANSUFFIXES = *.pc
 | 
			
		||||
LIBSUFFIXES       = *.a *.lib *.so *.so.* *.dylib *.dll *.def *.dll.a
 | 
			
		||||
LIBSUFFIXES       = *.a *.lib *.so *.so.* *.dylib *.dll *.def *.dll.a *.exp
 | 
			
		||||
 | 
			
		||||
define RULES
 | 
			
		||||
clean::
 | 
			
		||||
	$(RM) $(OBJS) $(OBJS:.o=.d)
 | 
			
		||||
	$(RM) $(HOSTPROGS)
 | 
			
		||||
	$(RM) $(TOOLS)
 | 
			
		||||
endef
 | 
			
		||||
 | 
			
		||||
$(eval $(RULES))
 | 
			
		||||
 | 
			
		||||
-include $(wildcard $(OBJS:.o=.d) $(HOSTOBJS:.o=.d) $(TESTOBJS:.o=.d) $(HOBJS:.o=.d))
 | 
			
		||||
-include $(wildcard $(DEPS))
 | 
			
		||||
 
 | 
			
		||||
@@ -1,86 +0,0 @@
 | 
			
		||||
/*
 | 
			
		||||
 * This file is part of FFmpeg.
 | 
			
		||||
 *
 | 
			
		||||
 * FFmpeg is free software; you can redistribute it and/or
 | 
			
		||||
 * modify it under the terms of the GNU Lesser General Public
 | 
			
		||||
 * License as published by the Free Software Foundation; either
 | 
			
		||||
 * version 2.1 of the License, or (at your option) any later version.
 | 
			
		||||
 *
 | 
			
		||||
 * FFmpeg is distributed in the hope that it will be useful,
 | 
			
		||||
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 | 
			
		||||
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 | 
			
		||||
 * Lesser General Public License for more details.
 | 
			
		||||
 *
 | 
			
		||||
 * You should have received a copy of the GNU Lesser General Public
 | 
			
		||||
 * License along with FFmpeg; if not, write to the Free Software
 | 
			
		||||
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
/*
 | 
			
		||||
 * This file was copied from the following newsgroup posting:
 | 
			
		||||
 *
 | 
			
		||||
 * Newsgroups: mod.std.unix
 | 
			
		||||
 * Subject: public domain AT&T getopt source
 | 
			
		||||
 * Date: 3 Nov 85 19:34:15 GMT
 | 
			
		||||
 *
 | 
			
		||||
 * Here's something you've all been waiting for:  the AT&T public domain
 | 
			
		||||
 * source for getopt(3).  It is the code which was given out at the 1985
 | 
			
		||||
 * UNIFORUM conference in Dallas.  I obtained it by electronic mail
 | 
			
		||||
 * directly from AT&T.  The people there assure me that it is indeed
 | 
			
		||||
 * in the public domain.
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
#include <stdio.h>
 | 
			
		||||
#include <string.h>
 | 
			
		||||
 | 
			
		||||
static int opterr = 1;
 | 
			
		||||
static int optind = 1;
 | 
			
		||||
static int optopt;
 | 
			
		||||
static char *optarg;
 | 
			
		||||
 | 
			
		||||
#undef fprintf
 | 
			
		||||
 | 
			
		||||
static int getopt(int argc, char *argv[], char *opts)
 | 
			
		||||
{
 | 
			
		||||
    static int sp = 1;
 | 
			
		||||
    int c;
 | 
			
		||||
    char *cp;
 | 
			
		||||
 | 
			
		||||
    if (sp == 1) {
 | 
			
		||||
        if (optind >= argc ||
 | 
			
		||||
            argv[optind][0] != '-' || argv[optind][1] == '\0')
 | 
			
		||||
            return EOF;
 | 
			
		||||
        else if (!strcmp(argv[optind], "--")) {
 | 
			
		||||
            optind++;
 | 
			
		||||
            return EOF;
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
    optopt = c = argv[optind][sp];
 | 
			
		||||
    if (c == ':' || (cp = strchr(opts, c)) == NULL) {
 | 
			
		||||
        fprintf(stderr, ": illegal option -- %c\n", c);
 | 
			
		||||
        if (argv[optind][++sp] == '\0') {
 | 
			
		||||
            optind++;
 | 
			
		||||
            sp = 1;
 | 
			
		||||
        }
 | 
			
		||||
        return '?';
 | 
			
		||||
    }
 | 
			
		||||
    if (*++cp == ':') {
 | 
			
		||||
        if (argv[optind][sp+1] != '\0')
 | 
			
		||||
            optarg = &argv[optind++][sp+1];
 | 
			
		||||
        else if(++optind >= argc) {
 | 
			
		||||
            fprintf(stderr, ": option requires an argument -- %c\n", c);
 | 
			
		||||
            sp = 1;
 | 
			
		||||
            return '?';
 | 
			
		||||
        } else
 | 
			
		||||
            optarg = argv[optind++];
 | 
			
		||||
        sp = 1;
 | 
			
		||||
    } else {
 | 
			
		||||
        if (argv[optind][++sp] == '\0') {
 | 
			
		||||
            sp = 1;
 | 
			
		||||
            optind++;
 | 
			
		||||
        }
 | 
			
		||||
        optarg = NULL;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    return c;
 | 
			
		||||
}
 | 
			
		||||
@@ -1,71 +0,0 @@
 | 
			
		||||
/*
 | 
			
		||||
 * C99-compatible snprintf() and vsnprintf() implementations
 | 
			
		||||
 * Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com>
 | 
			
		||||
 *
 | 
			
		||||
 * This file is part of FFmpeg.
 | 
			
		||||
 *
 | 
			
		||||
 * FFmpeg is free software; you can redistribute it and/or
 | 
			
		||||
 * modify it under the terms of the GNU Lesser General Public
 | 
			
		||||
 * License as published by the Free Software Foundation; either
 | 
			
		||||
 * version 2.1 of the License, or (at your option) any later version.
 | 
			
		||||
 *
 | 
			
		||||
 * FFmpeg is distributed in the hope that it will be useful,
 | 
			
		||||
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 | 
			
		||||
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 | 
			
		||||
 * Lesser General Public License for more details.
 | 
			
		||||
 *
 | 
			
		||||
 * You should have received a copy of the GNU Lesser General Public
 | 
			
		||||
 * License along with FFmpeg; if not, write to the Free Software
 | 
			
		||||
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
#include <stdio.h>
 | 
			
		||||
#include <stdarg.h>
 | 
			
		||||
#include <limits.h>
 | 
			
		||||
#include <string.h>
 | 
			
		||||
 | 
			
		||||
#include "compat/va_copy.h"
 | 
			
		||||
#include "libavutil/error.h"
 | 
			
		||||
 | 
			
		||||
#if defined(__MINGW32__)
 | 
			
		||||
#define EOVERFLOW EFBIG
 | 
			
		||||
#endif
 | 
			
		||||
 | 
			
		||||
int avpriv_snprintf(char *s, size_t n, const char *fmt, ...)
 | 
			
		||||
{
 | 
			
		||||
    va_list ap;
 | 
			
		||||
    int ret;
 | 
			
		||||
 | 
			
		||||
    va_start(ap, fmt);
 | 
			
		||||
    ret = avpriv_vsnprintf(s, n, fmt, ap);
 | 
			
		||||
    va_end(ap);
 | 
			
		||||
 | 
			
		||||
    return ret;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
int avpriv_vsnprintf(char *s, size_t n, const char *fmt,
 | 
			
		||||
                     va_list ap)
 | 
			
		||||
{
 | 
			
		||||
    int ret;
 | 
			
		||||
    va_list ap_copy;
 | 
			
		||||
 | 
			
		||||
    if (n == 0)
 | 
			
		||||
        return _vscprintf(fmt, ap);
 | 
			
		||||
    else if (n > INT_MAX)
 | 
			
		||||
        return AVERROR(EOVERFLOW);
 | 
			
		||||
 | 
			
		||||
    /* we use n - 1 here because if the buffer is not big enough, the MS
 | 
			
		||||
     * runtime libraries don't add a terminating zero at the end. MSDN
 | 
			
		||||
     * recommends to provide _snprintf/_vsnprintf() a buffer size that
 | 
			
		||||
     * is one less than the actual buffer, and zero it before calling
 | 
			
		||||
     * _snprintf/_vsnprintf() to workaround this problem.
 | 
			
		||||
     * See http://msdn.microsoft.com/en-us/library/1kt27hek(v=vs.80).aspx */
 | 
			
		||||
    memset(s, 0, n);
 | 
			
		||||
    va_copy(ap_copy, ap);
 | 
			
		||||
    ret = _vsnprintf(s, n - 1, fmt, ap_copy);
 | 
			
		||||
    va_end(ap_copy);
 | 
			
		||||
    if (ret == -1)
 | 
			
		||||
        ret = _vscprintf(fmt, ap);
 | 
			
		||||
 | 
			
		||||
    return ret;
 | 
			
		||||
}
 | 
			
		||||
@@ -1,10 +0,0 @@
 | 
			
		||||
#!/bin/sh
 | 
			
		||||
 | 
			
		||||
n=10
 | 
			
		||||
 | 
			
		||||
case "$1" in
 | 
			
		||||
    -n)  n=$2;      shift 2 ;;
 | 
			
		||||
    -n*) n=${1#-n}; shift   ;;
 | 
			
		||||
esac
 | 
			
		||||
 | 
			
		||||
exec sed ${n}q "$@"
 | 
			
		||||
@@ -1,34 +0,0 @@
 | 
			
		||||
/*
 | 
			
		||||
 * This file is part of FFmpeg.
 | 
			
		||||
 *
 | 
			
		||||
 * FFmpeg is free software; you can redistribute it and/or
 | 
			
		||||
 * modify it under the terms of the GNU Lesser General Public
 | 
			
		||||
 * License as published by the Free Software Foundation; either
 | 
			
		||||
 * version 2.1 of the License, or (at your option) any later version.
 | 
			
		||||
 *
 | 
			
		||||
 * FFmpeg is distributed in the hope that it will be useful,
 | 
			
		||||
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 | 
			
		||||
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 | 
			
		||||
 * Lesser General Public License for more details.
 | 
			
		||||
 *
 | 
			
		||||
 * You should have received a copy of the GNU Lesser General Public
 | 
			
		||||
 * License along with FFmpeg; if not, write to the Free Software
 | 
			
		||||
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
int plan9_main(int argc, char **argv);
 | 
			
		||||
 | 
			
		||||
#undef main
 | 
			
		||||
int main(int argc, char **argv)
 | 
			
		||||
{
 | 
			
		||||
    /* The setfcr() function in lib9 is broken, must use asm. */
 | 
			
		||||
#ifdef __i386
 | 
			
		||||
    short fcr;
 | 
			
		||||
    __asm__ volatile ("fstcw        %0 \n"
 | 
			
		||||
                      "or      $63, %0 \n"
 | 
			
		||||
                      "fldcw        %0 \n"
 | 
			
		||||
                      : "=m"(fcr));
 | 
			
		||||
#endif
 | 
			
		||||
 | 
			
		||||
    return plan9_main(argc, argv);
 | 
			
		||||
}
 | 
			
		||||
@@ -1,2 +0,0 @@
 | 
			
		||||
#!/bin/sh
 | 
			
		||||
exec awk "BEGIN { for (i = 2; i < ARGC; i++) printf \"$1\", ARGV[i] }" "$@"
 | 
			
		||||
@@ -1,94 +0,0 @@
 | 
			
		||||
/*
 | 
			
		||||
 * C99-compatible strtod() implementation
 | 
			
		||||
 * Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com>
 | 
			
		||||
 *
 | 
			
		||||
 * This file is part of FFmpeg.
 | 
			
		||||
 *
 | 
			
		||||
 * FFmpeg is free software; you can redistribute it and/or
 | 
			
		||||
 * modify it under the terms of the GNU Lesser General Public
 | 
			
		||||
 * License as published by the Free Software Foundation; either
 | 
			
		||||
 * version 2.1 of the License, or (at your option) any later version.
 | 
			
		||||
 *
 | 
			
		||||
 * FFmpeg is distributed in the hope that it will be useful,
 | 
			
		||||
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 | 
			
		||||
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 | 
			
		||||
 * Lesser General Public License for more details.
 | 
			
		||||
 *
 | 
			
		||||
 * You should have received a copy of the GNU Lesser General Public
 | 
			
		||||
 * License along with FFmpeg; if not, write to the Free Software
 | 
			
		||||
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
#include <ctype.h>
 | 
			
		||||
#include <limits.h>
 | 
			
		||||
#include <stdlib.h>
 | 
			
		||||
 | 
			
		||||
#include "libavutil/avstring.h"
 | 
			
		||||
#include "libavutil/mathematics.h"
 | 
			
		||||
 | 
			
		||||
static char *check_nan_suffix(char *s)
 | 
			
		||||
{
 | 
			
		||||
    char *start = s;
 | 
			
		||||
 | 
			
		||||
    if (*s++ != '(')
 | 
			
		||||
        return start;
 | 
			
		||||
 | 
			
		||||
    while ((*s >= 'a' && *s <= 'z') || (*s >= 'A' && *s <= 'Z') ||
 | 
			
		||||
           (*s >= '0' && *s <= '9') ||  *s == '_')
 | 
			
		||||
        s++;
 | 
			
		||||
 | 
			
		||||
    return *s == ')' ? s + 1 : start;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#undef strtod
 | 
			
		||||
double strtod(const char *, char **);
 | 
			
		||||
 | 
			
		||||
double avpriv_strtod(const char *nptr, char **endptr)
 | 
			
		||||
{
 | 
			
		||||
    char *end;
 | 
			
		||||
    double res;
 | 
			
		||||
 | 
			
		||||
    /* Skip leading spaces */
 | 
			
		||||
    while (isspace(*nptr))
 | 
			
		||||
        nptr++;
 | 
			
		||||
 | 
			
		||||
    if (!av_strncasecmp(nptr, "infinity", 8)) {
 | 
			
		||||
        end = nptr + 8;
 | 
			
		||||
        res = INFINITY;
 | 
			
		||||
    } else if (!av_strncasecmp(nptr, "inf", 3)) {
 | 
			
		||||
        end = nptr + 3;
 | 
			
		||||
        res = INFINITY;
 | 
			
		||||
    } else if (!av_strncasecmp(nptr, "+infinity", 9)) {
 | 
			
		||||
        end = nptr + 9;
 | 
			
		||||
        res = INFINITY;
 | 
			
		||||
    } else if (!av_strncasecmp(nptr, "+inf", 4)) {
 | 
			
		||||
        end = nptr + 4;
 | 
			
		||||
        res = INFINITY;
 | 
			
		||||
    } else if (!av_strncasecmp(nptr, "-infinity", 9)) {
 | 
			
		||||
        end = nptr + 9;
 | 
			
		||||
        res = -INFINITY;
 | 
			
		||||
    } else if (!av_strncasecmp(nptr, "-inf", 4)) {
 | 
			
		||||
        end = nptr + 4;
 | 
			
		||||
        res = -INFINITY;
 | 
			
		||||
    } else if (!av_strncasecmp(nptr, "nan", 3)) {
 | 
			
		||||
        end = check_nan_suffix(nptr + 3);
 | 
			
		||||
        res = NAN;
 | 
			
		||||
    } else if (!av_strncasecmp(nptr, "+nan", 4) ||
 | 
			
		||||
               !av_strncasecmp(nptr, "-nan", 4)) {
 | 
			
		||||
        end = check_nan_suffix(nptr + 4);
 | 
			
		||||
        res = NAN;
 | 
			
		||||
    } else if (!av_strncasecmp(nptr, "0x", 2) ||
 | 
			
		||||
               !av_strncasecmp(nptr, "-0x", 3) ||
 | 
			
		||||
               !av_strncasecmp(nptr, "+0x", 3)) {
 | 
			
		||||
        /* FIXME this doesn't handle exponents, non-integers (float/double)
 | 
			
		||||
         * and numbers too large for long long */
 | 
			
		||||
        res = strtoll(nptr, &end, 16);
 | 
			
		||||
    } else {
 | 
			
		||||
        res = strtod(nptr, &end);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    if (endptr)
 | 
			
		||||
        *endptr = end;
 | 
			
		||||
 | 
			
		||||
    return res;
 | 
			
		||||
}
 | 
			
		||||
@@ -1,7 +0,0 @@
 | 
			
		||||
#include_next <math.h>
 | 
			
		||||
 | 
			
		||||
#undef INFINITY
 | 
			
		||||
#undef NAN
 | 
			
		||||
 | 
			
		||||
#define INFINITY (*(const float*)((const unsigned []){ 0x7f800000 }))
 | 
			
		||||
#define NAN      (*(const float*)((const unsigned []){ 0x7fc00000 }))
 | 
			
		||||
@@ -1,26 +0,0 @@
 | 
			
		||||
/*
 | 
			
		||||
 * MSVC Compatible va_copy macro
 | 
			
		||||
 * Copyright (c) 2012 Derek Buitenhuis
 | 
			
		||||
 *
 | 
			
		||||
 * This file is part of FFmpeg.
 | 
			
		||||
 *
 | 
			
		||||
 * FFmpeg is free software; you can redistribute it and/or
 | 
			
		||||
 * modify it under the terms of the GNU Lesser General Public
 | 
			
		||||
 * License as published by the Free Software Foundation; either
 | 
			
		||||
 * version 2.1 of the License, or (at your option) any later version.
 | 
			
		||||
 *
 | 
			
		||||
 * FFmpeg is distributed in the hope that it will be useful,
 | 
			
		||||
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 | 
			
		||||
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 | 
			
		||||
 * Lesser General Public License for more details.
 | 
			
		||||
 *
 | 
			
		||||
 * You should have received a copy of the GNU Lesser General Public
 | 
			
		||||
 * License along with FFmpeg; if not, write to the Free Software
 | 
			
		||||
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
#include <stdarg.h>
 | 
			
		||||
 | 
			
		||||
#if !defined(va_copy) && defined(_MSC_VER)
 | 
			
		||||
#define va_copy(dst, src) ((dst) = (src))
 | 
			
		||||
#endif
 | 
			
		||||
							
								
								
									
										1404
									
								
								doc/APIchanges
									
									
									
									
									
								
							
							
						
						
									
										1404
									
								
								doc/APIchanges
									
									
									
									
									
								
							
										
											
												File diff suppressed because it is too large
												Load Diff
											
										
									
								
							
							
								
								
									
										103
									
								
								doc/Makefile
									
									
									
									
									
								
							
							
						
						
									
										103
									
								
								doc/Makefile
									
									
									
									
									
								
							@@ -1,103 +0,0 @@
 | 
			
		||||
LIBRARIES-$(CONFIG_AVUTIL)     += libavutil
 | 
			
		||||
LIBRARIES-$(CONFIG_SWSCALE)    += libswscale
 | 
			
		||||
LIBRARIES-$(CONFIG_SWRESAMPLE) += libswresample
 | 
			
		||||
LIBRARIES-$(CONFIG_AVCODEC)    += libavcodec
 | 
			
		||||
LIBRARIES-$(CONFIG_AVFORMAT)   += libavformat
 | 
			
		||||
LIBRARIES-$(CONFIG_AVDEVICE)   += libavdevice
 | 
			
		||||
LIBRARIES-$(CONFIG_AVFILTER)   += libavfilter
 | 
			
		||||
 | 
			
		||||
COMPONENTS-yes = $(PROGS-yes)
 | 
			
		||||
COMPONENTS-$(CONFIG_AVUTIL)     += ffmpeg-utils
 | 
			
		||||
COMPONENTS-$(CONFIG_SWSCALE)    += ffmpeg-scaler
 | 
			
		||||
COMPONENTS-$(CONFIG_SWRESAMPLE) += ffmpeg-resampler
 | 
			
		||||
COMPONENTS-$(CONFIG_AVCODEC)    += ffmpeg-codecs ffmpeg-bitstream-filters
 | 
			
		||||
COMPONENTS-$(CONFIG_AVFORMAT)   += ffmpeg-formats ffmpeg-protocols
 | 
			
		||||
COMPONENTS-$(CONFIG_AVDEVICE)   += ffmpeg-devices
 | 
			
		||||
COMPONENTS-$(CONFIG_AVFILTER)   += ffmpeg-filters
 | 
			
		||||
 | 
			
		||||
MANPAGES    = $(COMPONENTS-yes:%=doc/%.1)    $(LIBRARIES-yes:%=doc/%.3)
 | 
			
		||||
PODPAGES    = $(COMPONENTS-yes:%=doc/%.pod)  $(LIBRARIES-yes:%=doc/%.pod)
 | 
			
		||||
HTMLPAGES   = $(COMPONENTS-yes:%=doc/%.html) $(LIBRARIES-yes:%=doc/%.html)     \
 | 
			
		||||
              doc/developer.html                                        \
 | 
			
		||||
              doc/faq.html                                              \
 | 
			
		||||
              doc/fate.html                                             \
 | 
			
		||||
              doc/general.html                                          \
 | 
			
		||||
              doc/git-howto.html                                        \
 | 
			
		||||
              doc/nut.html                                              \
 | 
			
		||||
              doc/platform.html                                         \
 | 
			
		||||
 | 
			
		||||
TXTPAGES    = doc/fate.txt                                              \
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
DOCS-$(CONFIG_HTMLPAGES) += $(HTMLPAGES)
 | 
			
		||||
DOCS-$(CONFIG_PODPAGES)  += $(PODPAGES)
 | 
			
		||||
DOCS-$(CONFIG_MANPAGES)  += $(MANPAGES)
 | 
			
		||||
DOCS-$(CONFIG_TXTPAGES)  += $(TXTPAGES)
 | 
			
		||||
DOCS = $(DOCS-yes)
 | 
			
		||||
 | 
			
		||||
all-$(CONFIG_DOC): doc
 | 
			
		||||
 | 
			
		||||
doc: documentation
 | 
			
		||||
 | 
			
		||||
apidoc: doc/doxy/html
 | 
			
		||||
documentation: $(DOCS)
 | 
			
		||||
 | 
			
		||||
TEXIDEP = awk '/^@(verbatim)?include/ { printf "$@: $(@D)/%s\n", $$2 }' <$< >$(@:%=%.d)
 | 
			
		||||
 | 
			
		||||
doc/%.txt: TAG = TXT
 | 
			
		||||
doc/%.txt: doc/%.texi
 | 
			
		||||
	$(Q)$(TEXIDEP)
 | 
			
		||||
	$(M)makeinfo --force --no-headers -o $@ $< 2>/dev/null
 | 
			
		||||
 | 
			
		||||
GENTEXI  = format codec
 | 
			
		||||
GENTEXI := $(GENTEXI:%=doc/avoptions_%.texi)
 | 
			
		||||
 | 
			
		||||
$(GENTEXI): TAG = GENTEXI
 | 
			
		||||
$(GENTEXI): doc/avoptions_%.texi: doc/print_options$(HOSTEXESUF)
 | 
			
		||||
	$(M)doc/print_options $* > $@
 | 
			
		||||
 | 
			
		||||
doc/%.html: TAG = HTML
 | 
			
		||||
doc/%.html: doc/%.texi $(SRC_PATH)/doc/t2h.init $(GENTEXI)
 | 
			
		||||
	$(Q)$(TEXIDEP)
 | 
			
		||||
	$(M)texi2html -I doc -monolithic --init-file $(SRC_PATH)/doc/t2h.init --output $@ $<
 | 
			
		||||
 | 
			
		||||
doc/%.pod: TAG = POD
 | 
			
		||||
doc/%.pod: doc/%.texi $(GENTEXI)
 | 
			
		||||
	$(Q)$(TEXIDEP)
 | 
			
		||||
	$(M)perl $(SRC_PATH)/doc/texi2pod.pl -Idoc $< $@
 | 
			
		||||
 | 
			
		||||
doc/%.1 doc/%.3: TAG = MAN
 | 
			
		||||
doc/%.1: doc/%.pod $(GENTEXI)
 | 
			
		||||
	$(M)pod2man --section=1 --center=" " --release=" " $< > $@
 | 
			
		||||
doc/%.3: doc/%.pod $(GENTEXI)
 | 
			
		||||
	$(M)pod2man --section=3 --center=" " --release=" " $< > $@
 | 
			
		||||
 | 
			
		||||
$(DOCS) doc/doxy/html: | doc/
 | 
			
		||||
 | 
			
		||||
doc/doxy/html: $(SRC_PATH)/doc/Doxyfile $(INSTHEADERS)
 | 
			
		||||
	$(M)$(SRC_PATH)/doc/doxy-wrapper.sh $(SRC_PATH) $^
 | 
			
		||||
 | 
			
		||||
install-man:
 | 
			
		||||
 | 
			
		||||
ifdef CONFIG_MANPAGES
 | 
			
		||||
install-progs-$(CONFIG_DOC): install-man
 | 
			
		||||
 | 
			
		||||
install-man: $(MANPAGES)
 | 
			
		||||
	$(Q)mkdir -p "$(MANDIR)/man1"
 | 
			
		||||
	$(INSTALL) -m 644 $(MANPAGES) "$(MANDIR)/man1"
 | 
			
		||||
endif
 | 
			
		||||
 | 
			
		||||
uninstall: uninstall-man
 | 
			
		||||
 | 
			
		||||
uninstall-man:
 | 
			
		||||
	$(RM) $(addprefix "$(MANDIR)/man1/",$(ALLMANPAGES))
 | 
			
		||||
 | 
			
		||||
clean:: docclean
 | 
			
		||||
 | 
			
		||||
docclean:
 | 
			
		||||
	$(RM) $(TXTPAGES) doc/*.html doc/*.pod doc/*.1 doc/*.3 $(CLEANSUFFIXES:%=doc/%) doc/avoptions_*.texi
 | 
			
		||||
	$(RM) -r doc/doxy/html
 | 
			
		||||
 | 
			
		||||
-include $(wildcard $(DOCS:%=%.d))
 | 
			
		||||
 | 
			
		||||
.PHONY: apidoc doc documentation
 | 
			
		||||
@@ -1,25 +0,0 @@
 | 
			
		||||
Release Notes
 | 
			
		||||
=============
 | 
			
		||||
 | 
			
		||||
* 1.1 "Fire Flower"  January, 2013
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
General notes
 | 
			
		||||
-------------
 | 
			
		||||
See the Changelog file for a list of significant changes. Note, there
 | 
			
		||||
are many more new features and bugfixes than whats listed there.
 | 
			
		||||
 | 
			
		||||
Bugreports against FFmpeg git master or the most recent FFmpeg release are
 | 
			
		||||
accepted. If you are experiencing issues with any formally released version of
 | 
			
		||||
FFmpeg, please try git master to check if the issue still exists. If it does,
 | 
			
		||||
make your report against the development code following the usual bug reporting
 | 
			
		||||
guidelines.
 | 
			
		||||
 | 
			
		||||
Of big interest to our Windows users, FFmpeg now supports building with the MSVC
 | 
			
		||||
compiler. Since MSVC does not support C99 features used extensively by FFmpeg,
 | 
			
		||||
this has been accomplished using a converter that turns C99 code to C89. See the
 | 
			
		||||
platform-specific documentation for more detailed documentation on building
 | 
			
		||||
FFmpeg with MSVC.
 | 
			
		||||
 | 
			
		||||
The used output sample format for several audio decoders has changed, make
 | 
			
		||||
sure you always check/use AVCodecContext.sample_fmt or AVFrame.format.
 | 
			
		||||
							
								
								
									
										90
									
								
								doc/TODO
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										90
									
								
								doc/TODO
									
									
									
									
									
										Normal file
									
								
							@@ -0,0 +1,90 @@
 | 
			
		||||
ffmpeg TODO list:
 | 
			
		||||
----------------
 | 
			
		||||
 | 
			
		||||
Fabrice's TODO list: (unordered)
 | 
			
		||||
-------------------
 | 
			
		||||
Short term:
 | 
			
		||||
 | 
			
		||||
- use AVFMTCTX_DISCARD_PKT in ffplay so that DV has a chance to work
 | 
			
		||||
- add RTSP regression test (both client and server)
 | 
			
		||||
- make ffserver allocate AVFormatContext
 | 
			
		||||
- clean up (incompatible change, for 0.5.0):
 | 
			
		||||
    * AVStream -> AVComponent
 | 
			
		||||
    * AVFormatContext -> AVInputStream/AVOutputStream
 | 
			
		||||
    * suppress rate_emu from AVCodecContext
 | 
			
		||||
- add new float/integer audio filterting and conversion : suppress
 | 
			
		||||
  CODEC_ID_PCM_xxc and use CODEC_ID_RAWAUDIO.
 | 
			
		||||
- fix telecine and frame rate conversion
 | 
			
		||||
 | 
			
		||||
Long term (ask me if you want to help):
 | 
			
		||||
 | 
			
		||||
- commit new imgconvert API and new PIX_FMT_xxx alpha formats
 | 
			
		||||
- commit new LGPL'ed float and integer-only AC3 decoder
 | 
			
		||||
- add WMA integer-only decoder
 | 
			
		||||
- add new MPEG4-AAC audio decoder (both integer-only and float version)
 | 
			
		||||
 | 
			
		||||
Michael's TODO list: (unordered) (if anyone wanna help with sth, just ask)
 | 
			
		||||
-------------------
 | 
			
		||||
- optimize H264 CABAC
 | 
			
		||||
- more optimizations
 | 
			
		||||
- simper rate control
 | 
			
		||||
 | 
			
		||||
Francois' TODO list: (unordered, without any timeframe)
 | 
			
		||||
-------------------
 | 
			
		||||
- test MACE decoder against the openquicktime one as suggested by A'rpi
 | 
			
		||||
- BeOS audio input grabbing backend
 | 
			
		||||
- BeOS video input grabbing backend
 | 
			
		||||
- publish my BeOS libposix on BeBits so I can officially support ffserver :)
 | 
			
		||||
- check the whole code for thread-safety (global and init stuff)
 | 
			
		||||
 | 
			
		||||
Philip'a TODO list: (alphabetically ordered) (please help)
 | 
			
		||||
------------------
 | 
			
		||||
- Add a multi-ffm filetype so that feeds can be recorded into multiple files rather
 | 
			
		||||
  than one big file.
 | 
			
		||||
- Authenticated users support -- where the authentication is in the URL
 | 
			
		||||
- Change ASF files so that the embedded timestamp in the frames is right rather
 | 
			
		||||
  than being an offset from the start of the stream
 | 
			
		||||
- Make ffm files more resilient to changes in the codec structures so that you
 | 
			
		||||
  can play old ffm files.
 | 
			
		||||
 | 
			
		||||
Baptiste's TODO list:
 | 
			
		||||
-----------------
 | 
			
		||||
- mov edit list support (AVEditList)
 | 
			
		||||
- YUV 10 bit per component support "2vuy"
 | 
			
		||||
- mxf muxer
 | 
			
		||||
- mpeg2 non linear quantizer
 | 
			
		||||
 | 
			
		||||
unassigned TODO: (unordered)
 | 
			
		||||
---------------
 | 
			
		||||
- use AVFrame for audio codecs too
 | 
			
		||||
- rework aviobuf.c buffering strategy and fix url_fskip
 | 
			
		||||
- generate optimal huffman tables for mjpeg encoding
 | 
			
		||||
- fix ffserver regression tests
 | 
			
		||||
- support xvids motion estimation
 | 
			
		||||
- support x264s motion estimation
 | 
			
		||||
- support x264s rate control
 | 
			
		||||
- SNOW: non translational motion compensation
 | 
			
		||||
- SNOW: more optimal quantization
 | 
			
		||||
- SNOW: 4x4 block support
 | 
			
		||||
- SNOW: 1/8 pel motion compensation support
 | 
			
		||||
- SNOW: iterative motion estimation based on subsampled images
 | 
			
		||||
- SNOW: try B frames and MCTF and see how their PSNR/bitrate/complexity behaves
 | 
			
		||||
- SNOW: try to use the wavelet transformed MC-ed reference frame as context for the entropy coder
 | 
			
		||||
- SNOW: think about/analyize how to make snow use multiple cpus/threads
 | 
			
		||||
- SNOW: finish spec
 | 
			
		||||
- FLAC: lossy encoding (viterbi and naive scalar quantization)
 | 
			
		||||
- libavfilter
 | 
			
		||||
- JPEG2000 decoder & encoder
 | 
			
		||||
- MPEG4 GMC encoding support
 | 
			
		||||
- macroblock based pixel format (better cache locality, somewhat complex, one paper claimed it faster for high res)
 | 
			
		||||
- regression tests for codecs which do not have an encoder (I+P-frame bitstream in svn)
 | 
			
		||||
- add support for using mplayers video filters to ffmpeg
 | 
			
		||||
- H264 encoder
 | 
			
		||||
- per MB ratecontrol (so VCD and such do work better)
 | 
			
		||||
- write a script which iteratively changes all functions between always_inline and noinline and benchmarks the result to find the best set of inlined functions
 | 
			
		||||
- convert all the non SIMD asm into small asm vs. C testcases and submit them to the gcc devels so they can improve gcc
 | 
			
		||||
- generic audio mixing API
 | 
			
		||||
- extract PES packetizer from PS muxer and use it for new TS muxer
 | 
			
		||||
- implement automatic AVBistreamFilter activation
 | 
			
		||||
- make cabac encoder use bytestream (see http://trac.videolan.org/x264/changeset/?format=diff&new=651)
 | 
			
		||||
- merge imdct and windowing, the current code does considerable amounts of redundant work
 | 
			
		||||
@@ -1,11 +0,0 @@
 | 
			
		||||
@chapter Authors
 | 
			
		||||
 | 
			
		||||
The FFmpeg developers.
 | 
			
		||||
 | 
			
		||||
For details about the authorship, see the Git history of the project
 | 
			
		||||
(git://source.ffmpeg.org/ffmpeg), e.g. by typing the command
 | 
			
		||||
@command{git log} in the FFmpeg source directory, or browsing the
 | 
			
		||||
online repository at @url{http://source.ffmpeg.org}.
 | 
			
		||||
 | 
			
		||||
Maintainers for the specific components are listed in the file
 | 
			
		||||
@file{MAINTAINERS} in the source code tree.
 | 
			
		||||
@@ -1,211 +0,0 @@
 | 
			
		||||
All the numerical options, if not specified otherwise, accept in input
 | 
			
		||||
a string representing a number, which may contain one of the
 | 
			
		||||
SI unit prefixes, for example 'K', 'M', 'G'.
 | 
			
		||||
If 'i' is appended after the prefix, binary prefixes are used,
 | 
			
		||||
which are based on powers of 1024 instead of powers of 1000.
 | 
			
		||||
The 'B' postfix multiplies the value by 8, and can be
 | 
			
		||||
appended after a unit prefix or used alone. This allows using for
 | 
			
		||||
example 'KB', 'MiB', 'G' and 'B' as number postfix.
 | 
			
		||||
 | 
			
		||||
Options which do not take arguments are boolean options, and set the
 | 
			
		||||
corresponding value to true. They can be set to false by prefixing
 | 
			
		||||
with "no" the option name, for example using "-nofoo" in the
 | 
			
		||||
command line will set to false the boolean option with name "foo".
 | 
			
		||||
 | 
			
		||||
@anchor{Stream specifiers}
 | 
			
		||||
@section Stream specifiers
 | 
			
		||||
Some options are applied per-stream, e.g. bitrate or codec. Stream specifiers
 | 
			
		||||
are used to precisely specify which stream(s) does a given option belong to.
 | 
			
		||||
 | 
			
		||||
A stream specifier is a string generally appended to the option name and
 | 
			
		||||
separated from it by a colon. E.g. @code{-codec:a:1 ac3} option contains
 | 
			
		||||
@code{a:1} stream specifier, which matches the second audio stream. Therefore it
 | 
			
		||||
would select the ac3 codec for the second audio stream.
 | 
			
		||||
 | 
			
		||||
A stream specifier can match several streams, the option is then applied to all
 | 
			
		||||
of them. E.g. the stream specifier in @code{-b:a 128k} matches all audio
 | 
			
		||||
streams.
 | 
			
		||||
 | 
			
		||||
An empty stream specifier matches all streams, for example @code{-codec copy}
 | 
			
		||||
or @code{-codec: copy} would copy all the streams without reencoding.
 | 
			
		||||
 | 
			
		||||
Possible forms of stream specifiers are:
 | 
			
		||||
@table @option
 | 
			
		||||
@item @var{stream_index}
 | 
			
		||||
Matches the stream with this index. E.g. @code{-threads:1 4} would set the
 | 
			
		||||
thread count for the second stream to 4.
 | 
			
		||||
@item @var{stream_type}[:@var{stream_index}]
 | 
			
		||||
@var{stream_type} is one of: 'v' for video, 'a' for audio, 's' for subtitle,
 | 
			
		||||
'd' for data and 't' for attachments. If @var{stream_index} is given, then
 | 
			
		||||
matches stream number @var{stream_index} of this type. Otherwise matches all
 | 
			
		||||
streams of this type.
 | 
			
		||||
@item p:@var{program_id}[:@var{stream_index}]
 | 
			
		||||
If @var{stream_index} is given, then matches stream number @var{stream_index} in
 | 
			
		||||
program with id @var{program_id}. Otherwise matches all streams in this program.
 | 
			
		||||
@item #@var{stream_id}
 | 
			
		||||
Matches the stream by format-specific ID.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section Generic options
 | 
			
		||||
 | 
			
		||||
These options are shared amongst the av* tools.
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item -L
 | 
			
		||||
Show license.
 | 
			
		||||
 | 
			
		||||
@item -h, -?, -help, --help [@var{arg}]
 | 
			
		||||
Show help. An optional parameter may be specified to print help about a specific
 | 
			
		||||
item.
 | 
			
		||||
 | 
			
		||||
Possible values of @var{arg} are:
 | 
			
		||||
@table @option
 | 
			
		||||
@item decoder=@var{decoder_name}
 | 
			
		||||
Print detailed information about the decoder named @var{decoder_name}. Use the
 | 
			
		||||
@option{-decoders} option to get a list of all decoders.
 | 
			
		||||
 | 
			
		||||
@item encoder=@var{encoder_name}
 | 
			
		||||
Print detailed information about the encoder named @var{encoder_name}. Use the
 | 
			
		||||
@option{-encoders} option to get a list of all encoders.
 | 
			
		||||
 | 
			
		||||
@item demuxer=@var{demuxer_name}
 | 
			
		||||
Print detailed information about the demuxer named @var{demuxer_name}. Use the
 | 
			
		||||
@option{-formats} option to get a list of all demuxers and muxers.
 | 
			
		||||
 | 
			
		||||
@item muxer=@var{muxer_name}
 | 
			
		||||
Print detailed information about the muxer named @var{muxer_name}. Use the
 | 
			
		||||
@option{-formats} option to get a list of all muxers and demuxers.
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item -version
 | 
			
		||||
Show version.
 | 
			
		||||
 | 
			
		||||
@item -formats
 | 
			
		||||
Show available formats.
 | 
			
		||||
 | 
			
		||||
The fields preceding the format names have the following meanings:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item D
 | 
			
		||||
Decoding available
 | 
			
		||||
@item E
 | 
			
		||||
Encoding available
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item -codecs
 | 
			
		||||
Show all codecs known to libavcodec.
 | 
			
		||||
 | 
			
		||||
Note that the term 'codec' is used throughout this documentation as a shortcut
 | 
			
		||||
for what is more correctly called a media bitstream format.
 | 
			
		||||
 | 
			
		||||
@item -decoders
 | 
			
		||||
Show available decoders.
 | 
			
		||||
 | 
			
		||||
@item -encoders
 | 
			
		||||
Show all available encoders.
 | 
			
		||||
 | 
			
		||||
@item -bsfs
 | 
			
		||||
Show available bitstream filters.
 | 
			
		||||
 | 
			
		||||
@item -protocols
 | 
			
		||||
Show available protocols.
 | 
			
		||||
 | 
			
		||||
@item -filters
 | 
			
		||||
Show available libavfilter filters.
 | 
			
		||||
 | 
			
		||||
@item -pix_fmts
 | 
			
		||||
Show available pixel formats.
 | 
			
		||||
 | 
			
		||||
@item -sample_fmts
 | 
			
		||||
Show available sample formats.
 | 
			
		||||
 | 
			
		||||
@item -layouts
 | 
			
		||||
Show channel names and standard channel layouts.
 | 
			
		||||
 | 
			
		||||
@item -loglevel @var{loglevel} | -v @var{loglevel}
 | 
			
		||||
Set the logging level used by the library.
 | 
			
		||||
@var{loglevel} is a number or a string containing one of the following values:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item quiet
 | 
			
		||||
@item panic
 | 
			
		||||
@item fatal
 | 
			
		||||
@item error
 | 
			
		||||
@item warning
 | 
			
		||||
@item info
 | 
			
		||||
@item verbose
 | 
			
		||||
@item debug
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
By default the program logs to stderr, if coloring is supported by the
 | 
			
		||||
terminal, colors are used to mark errors and warnings. Log coloring
 | 
			
		||||
can be disabled setting the environment variable
 | 
			
		||||
@env{AV_LOG_FORCE_NOCOLOR} or @env{NO_COLOR}, or can be forced setting
 | 
			
		||||
the environment variable @env{AV_LOG_FORCE_COLOR}.
 | 
			
		||||
The use of the environment variable @env{NO_COLOR} is deprecated and
 | 
			
		||||
will be dropped in a following FFmpeg version.
 | 
			
		||||
 | 
			
		||||
@item -report
 | 
			
		||||
Dump full command line and console output to a file named
 | 
			
		||||
@code{@var{program}-@var{YYYYMMDD}-@var{HHMMSS}.log} in the current
 | 
			
		||||
directory.
 | 
			
		||||
This file can be useful for bug reports.
 | 
			
		||||
It also implies @code{-loglevel verbose}.
 | 
			
		||||
 | 
			
		||||
Setting the environment variable @code{FFREPORT} to any value has the
 | 
			
		||||
same effect. If the value is a ':'-separated key=value sequence, these
 | 
			
		||||
options will affect the report; options values must be escaped if they
 | 
			
		||||
contain special characters or the options delimiter ':' (see the
 | 
			
		||||
``Quoting and escaping'' section in the ffmpeg-utils manual). The
 | 
			
		||||
following option is recognized:
 | 
			
		||||
@table @option
 | 
			
		||||
@item file
 | 
			
		||||
set the file name to use for the report; @code{%p} is expanded to the name
 | 
			
		||||
of the program, @code{%t} is expanded to a timestamp, @code{%%} is expanded
 | 
			
		||||
to a plain @code{%}
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
Errors in parsing the environment variable are not fatal, and will not
 | 
			
		||||
appear in the report.
 | 
			
		||||
 | 
			
		||||
@item -cpuflags flags (@emph{global})
 | 
			
		||||
Allows setting and clearing cpu flags. This option is intended
 | 
			
		||||
for testing. Do not use it unless you know what you're doing.
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -cpuflags -sse+mmx ...
 | 
			
		||||
ffmpeg -cpuflags mmx ...
 | 
			
		||||
ffmpeg -cpuflags 0 ...
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section AVOptions
 | 
			
		||||
 | 
			
		||||
These options are provided directly by the libavformat, libavdevice and
 | 
			
		||||
libavcodec libraries. To see the list of available AVOptions, use the
 | 
			
		||||
@option{-help} option. They are separated into two categories:
 | 
			
		||||
@table @option
 | 
			
		||||
@item generic
 | 
			
		||||
These options can be set for any container, codec or device. Generic options
 | 
			
		||||
are listed under AVFormatContext options for containers/devices and under
 | 
			
		||||
AVCodecContext options for codecs.
 | 
			
		||||
@item private
 | 
			
		||||
These options are specific to the given container, device or codec. Private
 | 
			
		||||
options are listed under their corresponding containers/devices/codecs.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
For example to write an ID3v2.3 header instead of a default ID3v2.4 to
 | 
			
		||||
an MP3 file, use the @option{id3v2_version} private option of the MP3
 | 
			
		||||
muxer:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i input.flac -id3v2_version 3 out.mp3
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
All codec AVOptions are obviously per-stream, so the chapter on stream
 | 
			
		||||
specifiers applies to them
 | 
			
		||||
 | 
			
		||||
Note @option{-nooption} syntax cannot be used for boolean AVOptions,
 | 
			
		||||
use @option{-option 0}/@option{-option 1}.
 | 
			
		||||
 | 
			
		||||
Note2 old undocumented way of specifying per-stream AVOptions by prepending
 | 
			
		||||
v/a/s to the options name is now obsolete and will be removed soon.
 | 
			
		||||
@@ -19,6 +19,7 @@ integer.c               128bit integer math
 | 
			
		||||
lls.c
 | 
			
		||||
mathematics.c           greatest common divisor, integer sqrt, integer log2, ...
 | 
			
		||||
mem.c                   memory allocation routines with guaranteed alignment
 | 
			
		||||
softfloat.c
 | 
			
		||||
 | 
			
		||||
Headers:
 | 
			
		||||
bswap.h                 big/little/native-endian conversion code
 | 
			
		||||
 
 | 
			
		||||
@@ -1,91 +0,0 @@
 | 
			
		||||
@chapter Bitstream Filters
 | 
			
		||||
@c man begin BITSTREAM FILTERS
 | 
			
		||||
 | 
			
		||||
When you configure your FFmpeg build, all the supported bitstream
 | 
			
		||||
filters are enabled by default. You can list all available ones using
 | 
			
		||||
the configure option @code{--list-bsfs}.
 | 
			
		||||
 | 
			
		||||
You can disable all the bitstream filters using the configure option
 | 
			
		||||
@code{--disable-bsfs}, and selectively enable any bitstream filter using
 | 
			
		||||
the option @code{--enable-bsf=BSF}, or you can disable a particular
 | 
			
		||||
bitstream filter using the option @code{--disable-bsf=BSF}.
 | 
			
		||||
 | 
			
		||||
The option @code{-bsfs} of the ff* tools will display the list of
 | 
			
		||||
all the supported bitstream filters included in your build.
 | 
			
		||||
 | 
			
		||||
Below is a description of the currently available bitstream filters.
 | 
			
		||||
 | 
			
		||||
@section aac_adtstoasc
 | 
			
		||||
 | 
			
		||||
@section chomp
 | 
			
		||||
 | 
			
		||||
@section dump_extradata
 | 
			
		||||
 | 
			
		||||
@section h264_mp4toannexb
 | 
			
		||||
 | 
			
		||||
Convert an H.264 bitstream from length prefixed mode to start code
 | 
			
		||||
prefixed mode (as defined in the Annex B of the ITU-T H.264
 | 
			
		||||
specification).
 | 
			
		||||
 | 
			
		||||
This is required by some streaming formats, typically the MPEG-2
 | 
			
		||||
transport stream format ("mpegts").
 | 
			
		||||
 | 
			
		||||
For example to remux an MP4 file containing an H.264 stream to mpegts
 | 
			
		||||
format with @command{ffmpeg}, you can use the command:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT.mp4 -codec copy -bsf:v h264_mp4toannexb OUTPUT.ts
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section imx_dump_header
 | 
			
		||||
 | 
			
		||||
@section mjpeg2jpeg
 | 
			
		||||
 | 
			
		||||
Convert MJPEG/AVI1 packets to full JPEG/JFIF packets.
 | 
			
		||||
 | 
			
		||||
MJPEG is a video codec wherein each video frame is essentially a
 | 
			
		||||
JPEG image. The individual frames can be extracted without loss,
 | 
			
		||||
e.g. by
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i ../some_mjpeg.avi -c:v copy frames_%d.jpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Unfortunately, these chunks are incomplete JPEG images, because
 | 
			
		||||
they lack the DHT segment required for decoding. Quoting from
 | 
			
		||||
@url{http://www.digitalpreservation.gov/formats/fdd/fdd000063.shtml}:
 | 
			
		||||
 | 
			
		||||
Avery Lee, writing in the rec.video.desktop newsgroup in 2001,
 | 
			
		||||
commented that "MJPEG, or at least the MJPEG in AVIs having the
 | 
			
		||||
MJPG fourcc, is restricted JPEG with a fixed -- and *omitted* --
 | 
			
		||||
Huffman table. The JPEG must be YCbCr colorspace, it must be 4:2:2,
 | 
			
		||||
and it must use basic Huffman encoding, not arithmetic or
 | 
			
		||||
progressive. . . . You can indeed extract the MJPEG frames and
 | 
			
		||||
decode them with a regular JPEG decoder, but you have to prepend
 | 
			
		||||
the DHT segment to them, or else the decoder won't have any idea
 | 
			
		||||
how to decompress the data. The exact table necessary is given in
 | 
			
		||||
the OpenDML spec."
 | 
			
		||||
 | 
			
		||||
This bitstream filter patches the header of frames extracted from an MJPEG
 | 
			
		||||
stream (carrying the AVI1 header ID and lacking a DHT segment) to
 | 
			
		||||
produce fully qualified JPEG images.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i mjpeg-movie.avi -c:v copy -bsf:v mjpeg2jpeg frame_%d.jpg
 | 
			
		||||
exiftran -i -9 frame*.jpg
 | 
			
		||||
ffmpeg -i frame_%d.jpg -c:v copy rotated.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section mjpega_dump_header
 | 
			
		||||
 | 
			
		||||
@section movsub
 | 
			
		||||
 | 
			
		||||
@section mp3_header_compress
 | 
			
		||||
 | 
			
		||||
@section mp3_header_decompress
 | 
			
		||||
 | 
			
		||||
@section noise
 | 
			
		||||
 | 
			
		||||
@section remove_extradata
 | 
			
		||||
 | 
			
		||||
@c man end BITSTREAM FILTERS
 | 
			
		||||
@@ -1,50 +0,0 @@
 | 
			
		||||
FFmpeg currently uses a custom build system, this text attempts to document
 | 
			
		||||
some of its obscure features and options.
 | 
			
		||||
 | 
			
		||||
Makefile variables:
 | 
			
		||||
 | 
			
		||||
V
 | 
			
		||||
    Disable the default terse mode, the full command issued by make and its
 | 
			
		||||
    output will be shown on the screen.
 | 
			
		||||
 | 
			
		||||
DESTDIR
 | 
			
		||||
    Destination directory for the install targets, useful to prepare packages
 | 
			
		||||
    or install FFmpeg in cross-environments.
 | 
			
		||||
 | 
			
		||||
Makefile targets:
 | 
			
		||||
 | 
			
		||||
all
 | 
			
		||||
    Default target, builds all the libraries and the executables.
 | 
			
		||||
 | 
			
		||||
fate
 | 
			
		||||
    Run the fate test suite, note you must have installed it
 | 
			
		||||
 | 
			
		||||
fate-list
 | 
			
		||||
    Will list all fate/regression test targets
 | 
			
		||||
 | 
			
		||||
install
 | 
			
		||||
    Install headers, libraries and programs.
 | 
			
		||||
 | 
			
		||||
libavformat/output-example
 | 
			
		||||
    Build the libavformat basic example.
 | 
			
		||||
 | 
			
		||||
libavcodec/api-example
 | 
			
		||||
    Build the libavcodec basic example.
 | 
			
		||||
 | 
			
		||||
libswscale/swscale-test
 | 
			
		||||
    Build the swscale self-test (useful also as example).
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
Useful standard make commands:
 | 
			
		||||
make -t <target>
 | 
			
		||||
    Touch all files that otherwise would be build, this is useful to reduce
 | 
			
		||||
    unneeded rebuilding when changing headers, but note you must force rebuilds
 | 
			
		||||
    of files that actually need it by hand then.
 | 
			
		||||
 | 
			
		||||
make -j<num>
 | 
			
		||||
    rebuild with multiple jobs at the same time. Faster on multi processor systems
 | 
			
		||||
 | 
			
		||||
make -k
 | 
			
		||||
    continue build in case of errors, this is useful for the regression tests
 | 
			
		||||
    sometimes but note it will still not run all reg tests.
 | 
			
		||||
 | 
			
		||||
@@ -1,161 +0,0 @@
 | 
			
		||||
@chapter Decoders
 | 
			
		||||
@c man begin DECODERS
 | 
			
		||||
 | 
			
		||||
Decoders are configured elements in FFmpeg which allow the decoding of
 | 
			
		||||
multimedia streams.
 | 
			
		||||
 | 
			
		||||
When you configure your FFmpeg build, all the supported native decoders
 | 
			
		||||
are enabled by default. Decoders requiring an external library must be enabled
 | 
			
		||||
manually via the corresponding @code{--enable-lib} option. You can list all
 | 
			
		||||
available decoders using the configure option @code{--list-decoders}.
 | 
			
		||||
 | 
			
		||||
You can disable all the decoders with the configure option
 | 
			
		||||
@code{--disable-decoders} and selectively enable / disable single decoders
 | 
			
		||||
with the options @code{--enable-decoder=@var{DECODER}} /
 | 
			
		||||
@code{--disable-decoder=@var{DECODER}}.
 | 
			
		||||
 | 
			
		||||
The option @code{-codecs} of the ff* tools will display the list of
 | 
			
		||||
enabled decoders.
 | 
			
		||||
 | 
			
		||||
@c man end DECODERS
 | 
			
		||||
 | 
			
		||||
@chapter Video Decoders
 | 
			
		||||
@c man begin VIDEO DECODERS
 | 
			
		||||
 | 
			
		||||
A description of some of the currently available video decoders
 | 
			
		||||
follows.
 | 
			
		||||
 | 
			
		||||
@section rawvideo
 | 
			
		||||
 | 
			
		||||
Raw video decoder.
 | 
			
		||||
 | 
			
		||||
This decoder decodes rawvideo streams.
 | 
			
		||||
 | 
			
		||||
@subsection Options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item top @var{top_field_first}
 | 
			
		||||
Specify the assumed field type of the input video.
 | 
			
		||||
@table @option
 | 
			
		||||
@item -1
 | 
			
		||||
the video is assumed to be progressive (default)
 | 
			
		||||
@item 0
 | 
			
		||||
bottom-field-first is assumed
 | 
			
		||||
@item 1
 | 
			
		||||
top-field-first is assumed
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@c man end VIDEO DECODERS
 | 
			
		||||
 | 
			
		||||
@chapter Audio Decoders
 | 
			
		||||
@c man begin AUDIO DECODERS
 | 
			
		||||
 | 
			
		||||
@section ffwavesynth
 | 
			
		||||
 | 
			
		||||
Internal wave synthetizer.
 | 
			
		||||
 | 
			
		||||
This decoder generates wave patterns according to predefined sequences. Its
 | 
			
		||||
use is purely internal and the format of the data it accepts is not publicly
 | 
			
		||||
documented.
 | 
			
		||||
 | 
			
		||||
@section libcelt
 | 
			
		||||
 | 
			
		||||
libcelt decoder wrapper
 | 
			
		||||
 | 
			
		||||
libcelt allows libavcodec to decode the Xiph CELT ultra-low delay audio codec.
 | 
			
		||||
Requires the presence of the libcelt headers and library during configuration.
 | 
			
		||||
You need to explicitly configure the build with @code{--enable-libcelt}.
 | 
			
		||||
 | 
			
		||||
@section libgsm
 | 
			
		||||
 | 
			
		||||
libgsm decoder wrapper
 | 
			
		||||
 | 
			
		||||
libgsm allows libavcodec to decode the GSM full rate audio codec. Requires
 | 
			
		||||
the presence of the libgsm headers and library during configuration. You need
 | 
			
		||||
to explicitly configure the build with @code{--enable-libgsm}.
 | 
			
		||||
 | 
			
		||||
This decoder supports both the ordinary GSM and the Microsoft variant.
 | 
			
		||||
 | 
			
		||||
@section libilbc
 | 
			
		||||
 | 
			
		||||
libilbc decoder wrapper
 | 
			
		||||
 | 
			
		||||
libilbc allows libavcodec to decode the Internet Low Bitrate Codec (iLBC)
 | 
			
		||||
audio codec. Requires the presence of the libilbc headers and library during
 | 
			
		||||
configuration. You need to explicitly configure the build with
 | 
			
		||||
@code{--enable-libilbc}.
 | 
			
		||||
 | 
			
		||||
@subsection Options
 | 
			
		||||
 | 
			
		||||
The following option is supported by the libilbc wrapper.
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item enhance
 | 
			
		||||
 | 
			
		||||
Enable the enhancement of the decoded audio when set to 1. The default
 | 
			
		||||
value is 0 (disabled).
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section libopencore-amrnb
 | 
			
		||||
 | 
			
		||||
libopencore-amrnb decoder wrapper
 | 
			
		||||
 | 
			
		||||
libopencore-amrnb allows libavcodec to decode the Adaptive Multi-Rate
 | 
			
		||||
Narrowband audio codec. Using it requires the presence of the
 | 
			
		||||
libopencore-amrnb headers and library during configuration. You need to
 | 
			
		||||
explicitly configure the build with @code{--enable-libopencore-amrnb}.
 | 
			
		||||
 | 
			
		||||
An FFmpeg native decoder for AMR-NB exists, so users can decode AMR-NB
 | 
			
		||||
without this library.
 | 
			
		||||
 | 
			
		||||
@section libopencore-amrwb
 | 
			
		||||
 | 
			
		||||
libopencore-amrwb decoder wrapper.
 | 
			
		||||
 | 
			
		||||
libopencore-amrwb allows libavcodec to decode the Adaptive Multi-Rate
 | 
			
		||||
Wideband audio codec. Using it requires the presence of the
 | 
			
		||||
libopencore-amrwb headers and library during configuration. You need to
 | 
			
		||||
explicitly configure the build with @code{--enable-libopencore-amrwb}.
 | 
			
		||||
 | 
			
		||||
An FFmpeg native decoder for AMR-WB exists, so users can decode AMR-WB
 | 
			
		||||
without this library.
 | 
			
		||||
 | 
			
		||||
@section libopus
 | 
			
		||||
 | 
			
		||||
libopus decoder wrapper.
 | 
			
		||||
 | 
			
		||||
libopus allows libavcodec to decode the Opus Interactive Audio Codec.
 | 
			
		||||
Requires the presence of the libopus headers and library during
 | 
			
		||||
configuration. You need to explicitly configure the build with
 | 
			
		||||
@code{--enable-libopus}.
 | 
			
		||||
 | 
			
		||||
@c man end AUDIO DECODERS
 | 
			
		||||
 | 
			
		||||
@chapter Subtitles Decoders
 | 
			
		||||
@c man begin SUBTILES DECODERS
 | 
			
		||||
 | 
			
		||||
@section dvdsub
 | 
			
		||||
 | 
			
		||||
This codec decodes the bitmap subtitles used in DVDs; the same subtitles can
 | 
			
		||||
also be found in VobSub file pairs and in some Matroska files.
 | 
			
		||||
 | 
			
		||||
@subsection Options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item palette
 | 
			
		||||
Specify the global palette used by the bitmaps. When stored in VobSub, the
 | 
			
		||||
palette is normally specified in the index file; in Matroska, the palette is
 | 
			
		||||
stored in the codec extra-data in the same format as in VobSub. In DVDs, the
 | 
			
		||||
palette is stored in the IFO file, and therefore not available when reading
 | 
			
		||||
from dumped VOB files.
 | 
			
		||||
 | 
			
		||||
The format for this option is a string containing 16 24-bits hexadecimal
 | 
			
		||||
numbers (without 0x prefix) separated by comas, for example @code{0d00ee,
 | 
			
		||||
ee450d, 101010, eaeaea, 0ce60b, ec14ed, ebff0b, 0d617a, 7b7b7b, d1d1d1,
 | 
			
		||||
7b2a0e, 0d950c, 0f007b, cf0dec, cfa80c, 7c127b}.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@c man end SUBTILES DECODERS
 | 
			
		||||
							
								
								
									
										149
									
								
								doc/default.css
									
									
									
									
									
								
							
							
						
						
									
										149
									
								
								doc/default.css
									
									
									
									
									
								
							@@ -1,149 +0,0 @@
 | 
			
		||||
a {
 | 
			
		||||
    color: #2D6198;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
a:visited {
 | 
			
		||||
    color: #884488;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#banner {
 | 
			
		||||
    background-color: white;
 | 
			
		||||
    position: relative;
 | 
			
		||||
    text-align: center;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#banner img {
 | 
			
		||||
    padding-bottom: 1px;
 | 
			
		||||
    padding-top: 5px;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#body {
 | 
			
		||||
    margin-left: 1em;
 | 
			
		||||
    margin-right: 1em;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
body {
 | 
			
		||||
    background-color: #313131;
 | 
			
		||||
    margin: 0;
 | 
			
		||||
    text-align: justify;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
.center {
 | 
			
		||||
    margin-left: auto;
 | 
			
		||||
    margin-right: auto;
 | 
			
		||||
    text-align: center;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#container {
 | 
			
		||||
    background-color: white;
 | 
			
		||||
    color: #202020;
 | 
			
		||||
    margin-left: 1em;
 | 
			
		||||
    margin-right: 1em;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#footer {
 | 
			
		||||
    text-align: center;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
h1, h2, h3 {
 | 
			
		||||
    padding-left: 0.4em;
 | 
			
		||||
    border-radius: 4px;
 | 
			
		||||
    padding-bottom: 0.2em;
 | 
			
		||||
    padding-top: 0.2em;
 | 
			
		||||
    border: 1px solid #6A996A;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
h1 {
 | 
			
		||||
    background-color: #7BB37B;
 | 
			
		||||
    color: #151515;
 | 
			
		||||
    font-size: 1.2em;
 | 
			
		||||
    padding-bottom: 0.3em;
 | 
			
		||||
    padding-top: 0.3em;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
h2 {
 | 
			
		||||
    color: #313131;
 | 
			
		||||
    font-size: 0.9em;
 | 
			
		||||
    background-color: #ABE3AB;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
h3 {
 | 
			
		||||
    color: #313131;
 | 
			
		||||
    font-size: 0.8em;
 | 
			
		||||
    margin-bottom: -8px;
 | 
			
		||||
    background-color: #BBF3BB;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
img {
 | 
			
		||||
    border: 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#navbar {
 | 
			
		||||
    background-color: #738073;
 | 
			
		||||
    border-bottom: 1px solid #5C665C;
 | 
			
		||||
    border-top: 1px solid #5C665C;
 | 
			
		||||
    margin-top: 12px;
 | 
			
		||||
    padding: 0.3em;
 | 
			
		||||
    position: relative;
 | 
			
		||||
    text-align: center;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#navbar a, #navbar_secondary a {
 | 
			
		||||
    color: white;
 | 
			
		||||
    padding: 0.3em;
 | 
			
		||||
    text-decoration: none;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#navbar a:hover, #navbar_secondary a:hover {
 | 
			
		||||
    background-color: #313131;
 | 
			
		||||
    color: white;
 | 
			
		||||
    text-decoration: none;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#navbar_secondary {
 | 
			
		||||
    background-color: #738073;
 | 
			
		||||
    border-bottom: 1px solid #5C665C;
 | 
			
		||||
    border-left: 1px solid #5C665C;
 | 
			
		||||
    border-right: 1px solid #5C665C;
 | 
			
		||||
    padding: 0.3em;
 | 
			
		||||
    position: relative;
 | 
			
		||||
    text-align: center;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
p {
 | 
			
		||||
    margin-left: 1em;
 | 
			
		||||
    margin-right: 1em;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
pre {
 | 
			
		||||
    margin-left: 3em;
 | 
			
		||||
    margin-right: 3em;
 | 
			
		||||
    padding: 0.3em;
 | 
			
		||||
    border: 1px solid #bbb;
 | 
			
		||||
    background-color: #f7f7f7;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
dl dt {
 | 
			
		||||
    font-weight: bold;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#proj_desc {
 | 
			
		||||
    font-size: 1.2em;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#repos {
 | 
			
		||||
    margin-left: 1em;
 | 
			
		||||
    margin-right: 1em;
 | 
			
		||||
    border-collapse: collapse;
 | 
			
		||||
    border: solid 1px #6A996A;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#repos th {
 | 
			
		||||
    background-color: #7BB37B;
 | 
			
		||||
    border: solid 1px #6A996A;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
#repos td {
 | 
			
		||||
    padding: 0.2em;
 | 
			
		||||
    border: solid 1px #6A996A;
 | 
			
		||||
}
 | 
			
		||||
@@ -1,239 +0,0 @@
 | 
			
		||||
@chapter Demuxers
 | 
			
		||||
@c man begin DEMUXERS
 | 
			
		||||
 | 
			
		||||
Demuxers are configured elements in FFmpeg which allow to read the
 | 
			
		||||
multimedia streams from a particular type of file.
 | 
			
		||||
 | 
			
		||||
When you configure your FFmpeg build, all the supported demuxers
 | 
			
		||||
are enabled by default. You can list all available ones using the
 | 
			
		||||
configure option "--list-demuxers".
 | 
			
		||||
 | 
			
		||||
You can disable all the demuxers using the configure option
 | 
			
		||||
"--disable-demuxers", and selectively enable a single demuxer with
 | 
			
		||||
the option "--enable-demuxer=@var{DEMUXER}", or disable it
 | 
			
		||||
with the option "--disable-demuxer=@var{DEMUXER}".
 | 
			
		||||
 | 
			
		||||
The option "-formats" of the ff* tools will display the list of
 | 
			
		||||
enabled demuxers.
 | 
			
		||||
 | 
			
		||||
The description of some of the currently available demuxers follows.
 | 
			
		||||
 | 
			
		||||
@section image2
 | 
			
		||||
 | 
			
		||||
Image file demuxer.
 | 
			
		||||
 | 
			
		||||
This demuxer reads from a list of image files specified by a pattern.
 | 
			
		||||
The syntax and meaning of the pattern is specified by the
 | 
			
		||||
option @var{pattern_type}.
 | 
			
		||||
 | 
			
		||||
The pattern may contain a suffix which is used to automatically
 | 
			
		||||
determine the format of the images contained in the files.
 | 
			
		||||
 | 
			
		||||
The size, the pixel format, and the format of each image must be the
 | 
			
		||||
same for all the files in the sequence.
 | 
			
		||||
 | 
			
		||||
This demuxer accepts the following options:
 | 
			
		||||
@table @option
 | 
			
		||||
@item framerate
 | 
			
		||||
Set the framerate for the video stream. It defaults to 25.
 | 
			
		||||
@item loop
 | 
			
		||||
If set to 1, loop over the input. Default value is 0.
 | 
			
		||||
@item pattern_type
 | 
			
		||||
Select the pattern type used to interpret the provided filename.
 | 
			
		||||
 | 
			
		||||
@var{pattern_type} accepts one of the following values.
 | 
			
		||||
@table @option
 | 
			
		||||
@item sequence
 | 
			
		||||
Select a sequence pattern type, used to specify a sequence of files
 | 
			
		||||
indexed by sequential numbers.
 | 
			
		||||
 | 
			
		||||
A sequence pattern may contain the string "%d" or "%0@var{N}d", which
 | 
			
		||||
specifies the position of the characters representing a sequential
 | 
			
		||||
number in each filename matched by the pattern. If the form
 | 
			
		||||
"%d0@var{N}d" is used, the string representing the number in each
 | 
			
		||||
filename is 0-padded and @var{N} is the total number of 0-padded
 | 
			
		||||
digits representing the number. The literal character '%' can be
 | 
			
		||||
specified in the pattern with the string "%%".
 | 
			
		||||
 | 
			
		||||
If the sequence pattern contains "%d" or "%0@var{N}d", the first filename of
 | 
			
		||||
the file list specified by the pattern must contain a number
 | 
			
		||||
inclusively contained between @var{start_number} and
 | 
			
		||||
@var{start_number}+@var{start_number_range}-1, and all the following
 | 
			
		||||
numbers must be sequential.
 | 
			
		||||
 | 
			
		||||
For example the pattern "img-%03d.bmp" will match a sequence of
 | 
			
		||||
filenames of the form @file{img-001.bmp}, @file{img-002.bmp}, ...,
 | 
			
		||||
@file{img-010.bmp}, etc.; the pattern "i%%m%%g-%d.jpg" will match a
 | 
			
		||||
sequence of filenames of the form @file{i%m%g-1.jpg},
 | 
			
		||||
@file{i%m%g-2.jpg}, ..., @file{i%m%g-10.jpg}, etc.
 | 
			
		||||
 | 
			
		||||
Note that the pattern must not necessarily contain "%d" or
 | 
			
		||||
"%0@var{N}d", for example to convert a single image file
 | 
			
		||||
@file{img.jpeg} you can employ the command:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i img.jpeg img.png
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item glob
 | 
			
		||||
Select a glob wildcard pattern type.
 | 
			
		||||
 | 
			
		||||
The pattern is interpreted like a @code{glob()} pattern. This is only
 | 
			
		||||
selectable if libavformat was compiled with globbing support.
 | 
			
		||||
 | 
			
		||||
@item glob_sequence @emph{(deprecated, will be removed)}
 | 
			
		||||
Select a mixed glob wildcard/sequence pattern.
 | 
			
		||||
 | 
			
		||||
If your version of libavformat was compiled with globbing support, and
 | 
			
		||||
the provided pattern contains at least one glob meta character among
 | 
			
		||||
@code{%*?[]@{@}} that is preceded by an unescaped "%", the pattern is
 | 
			
		||||
interpreted like a @code{glob()} pattern, otherwise it is interpreted
 | 
			
		||||
like a sequence pattern.
 | 
			
		||||
 | 
			
		||||
All glob special characters @code{%*?[]@{@}} must be prefixed
 | 
			
		||||
with "%". To escape a literal "%" you shall use "%%".
 | 
			
		||||
 | 
			
		||||
For example the pattern @code{foo-%*.jpeg} will match all the
 | 
			
		||||
filenames prefixed by "foo-" and terminating with ".jpeg", and
 | 
			
		||||
@code{foo-%?%?%?.jpeg} will match all the filenames prefixed with
 | 
			
		||||
"foo-", followed by a sequence of three characters, and terminating
 | 
			
		||||
with ".jpeg".
 | 
			
		||||
 | 
			
		||||
This pattern type is deprecated in favor of @var{glob} and
 | 
			
		||||
@var{sequence}.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
Default value is @var{glob_sequence}.
 | 
			
		||||
@item pixel_format
 | 
			
		||||
Set the pixel format of the images to read. If not specified the pixel
 | 
			
		||||
format is guessed from the first image file in the sequence.
 | 
			
		||||
@item start_number
 | 
			
		||||
Set the index of the file matched by the image file pattern to start
 | 
			
		||||
to read from. Default value is 0.
 | 
			
		||||
@item start_number_range
 | 
			
		||||
Set the index interval range to check when looking for the first image
 | 
			
		||||
file in the sequence, starting from @var{start_number}. Default value
 | 
			
		||||
is 5.
 | 
			
		||||
@item video_size
 | 
			
		||||
Set the video size of the images to read. If not specified the video
 | 
			
		||||
size is guessed from the first image file in the sequence.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@subsection Examples
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
@item
 | 
			
		||||
Use @command{ffmpeg} for creating a video from the images in the file
 | 
			
		||||
sequence @file{img-001.jpeg}, @file{img-002.jpeg}, ..., assuming an
 | 
			
		||||
input frame rate of 10 frames per second:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i 'img-%03d.jpeg' -r 10 out.mkv
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
As above, but start by reading from a file with index 100 in the sequence:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -start_number 100 -i 'img-%03d.jpeg' -r 10 out.mkv
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Read images matching the "*.png" glob pattern , that is all the files
 | 
			
		||||
terminating with the ".png" suffix:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -pattern_type glob -i "*.png" -r 10 out.mkv
 | 
			
		||||
@end example
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@section applehttp
 | 
			
		||||
 | 
			
		||||
Apple HTTP Live Streaming demuxer.
 | 
			
		||||
 | 
			
		||||
This demuxer presents all AVStreams from all variant streams.
 | 
			
		||||
The id field is set to the bitrate variant index number. By setting
 | 
			
		||||
the discard flags on AVStreams (by pressing 'a' or 'v' in ffplay),
 | 
			
		||||
the caller can decide which variant streams to actually receive.
 | 
			
		||||
The total bitrate of the variant that the stream belongs to is
 | 
			
		||||
available in a metadata key named "variant_bitrate".
 | 
			
		||||
 | 
			
		||||
@section sbg
 | 
			
		||||
 | 
			
		||||
SBaGen script demuxer.
 | 
			
		||||
 | 
			
		||||
This demuxer reads the script language used by SBaGen
 | 
			
		||||
@url{http://uazu.net/sbagen/} to generate binaural beats sessions. A SBG
 | 
			
		||||
script looks like that:
 | 
			
		||||
@example
 | 
			
		||||
-SE
 | 
			
		||||
a: 300-2.5/3 440+4.5/0
 | 
			
		||||
b: 300-2.5/0 440+4.5/3
 | 
			
		||||
off: -
 | 
			
		||||
NOW      == a
 | 
			
		||||
+0:07:00 == b
 | 
			
		||||
+0:14:00 == a
 | 
			
		||||
+0:21:00 == b
 | 
			
		||||
+0:30:00    off
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
A SBG script can mix absolute and relative timestamps. If the script uses
 | 
			
		||||
either only absolute timestamps (including the script start time) or only
 | 
			
		||||
relative ones, then its layout is fixed, and the conversion is
 | 
			
		||||
straightforward. On the other hand, if the script mixes both kind of
 | 
			
		||||
timestamps, then the @var{NOW} reference for relative timestamps will be
 | 
			
		||||
taken from the current time of day at the time the script is read, and the
 | 
			
		||||
script layout will be frozen according to that reference. That means that if
 | 
			
		||||
the script is directly played, the actual times will match the absolute
 | 
			
		||||
timestamps up to the sound controller's clock accuracy, but if the user
 | 
			
		||||
somehow pauses the playback or seeks, all times will be shifted accordingly.
 | 
			
		||||
 | 
			
		||||
@section concat
 | 
			
		||||
 | 
			
		||||
Virtual concatenation script demuxer.
 | 
			
		||||
 | 
			
		||||
This demuxer reads a list of files and other directives from a text file and
 | 
			
		||||
demuxes them one after the other, as if all their packet had been muxed
 | 
			
		||||
together.
 | 
			
		||||
 | 
			
		||||
The timestamps in the files are adjusted so that the first file starts at 0
 | 
			
		||||
and each next file starts where the previous one finishes. Note that it is
 | 
			
		||||
done globally and may cause gaps if all streams do not have exactly the same
 | 
			
		||||
length.
 | 
			
		||||
 | 
			
		||||
All files must have the same streams (same codecs, same time base, etc.).
 | 
			
		||||
 | 
			
		||||
This script format can currently not be probed, it must be specified explicitly.
 | 
			
		||||
 | 
			
		||||
@subsection Syntax
 | 
			
		||||
 | 
			
		||||
The script is a text file in extended-ASCII, with one directive per line.
 | 
			
		||||
Empty lines, leading spaces and lines starting with '#' are ignored. The
 | 
			
		||||
following directive is recognized:
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item @code{file @var{path}}
 | 
			
		||||
Path to a file to read; special characters and spaces must be escaped with
 | 
			
		||||
backslash or single quotes.
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section tedcaptions
 | 
			
		||||
 | 
			
		||||
JSON captions used for @url{http://www.ted.com/, TED Talks}.
 | 
			
		||||
 | 
			
		||||
TED does not provide links to the captions, but they can be guessed from the
 | 
			
		||||
page. The file @file{tools/bookmarklets.html} from the FFmpeg source tree
 | 
			
		||||
contains a bookmarklet to expose them.
 | 
			
		||||
 | 
			
		||||
This demuxer accepts the following option:
 | 
			
		||||
@table @option
 | 
			
		||||
@item start_time
 | 
			
		||||
Set the start time of the TED talk, in milliseconds. The default is 15000
 | 
			
		||||
(15s). It is used to sync the captions with the downloadable videos, because
 | 
			
		||||
they include a 15s intro.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
Example: convert the captions to a format most players understand:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i http://www.ted.com/talks/subtitles/id/1/lang/en talk1-en.srt
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@c man end INPUT DEVICES
 | 
			
		||||
@@ -2,25 +2,23 @@
 | 
			
		||||
 | 
			
		||||
@settitle Developer Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@sp 7
 | 
			
		||||
@center @titlefont{Developer Documentation}
 | 
			
		||||
@sp 3
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Developers Guide
 | 
			
		||||
 | 
			
		||||
@section API
 | 
			
		||||
@itemize @bullet
 | 
			
		||||
@item libavcodec is the library containing the codecs (both encoding and
 | 
			
		||||
decoding). Look at @file{doc/examples/decoding_encoding.c} to see how to use
 | 
			
		||||
it.
 | 
			
		||||
decoding). Look at @file{libavcodec/apiexample.c} to see how to use it.
 | 
			
		||||
 | 
			
		||||
@item libavformat is the library containing the file format handling (mux and
 | 
			
		||||
demux code for several formats). Look at @file{ffplay.c} to use it in a
 | 
			
		||||
player. See @file{doc/examples/muxing.c} to use it to generate audio or video
 | 
			
		||||
streams.
 | 
			
		||||
player. See @file{libavformat/output-example.c} to use it to generate
 | 
			
		||||
audio or video streams.
 | 
			
		||||
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@@ -35,57 +33,59 @@ You can use libavcodec or libavformat in your commercial program, but
 | 
			
		||||
@emph{any patch you make must be published}. The best way to proceed is
 | 
			
		||||
to send your patches to the FFmpeg mailing list.
 | 
			
		||||
 | 
			
		||||
@section Contributing
 | 
			
		||||
 | 
			
		||||
There are 3 ways by which code gets into ffmpeg.
 | 
			
		||||
@itemize @bullet
 | 
			
		||||
@item Submitting Patches to the main developer mailing list
 | 
			
		||||
      see @ref{Submitting patches} for details.
 | 
			
		||||
@item Directly committing changes to the main tree.
 | 
			
		||||
@item Committing changes to a git clone, for example on github.com or
 | 
			
		||||
      gitorious.org. And asking us to merge these changes.
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
Whichever way, changes should be reviewed by the maintainer of the code
 | 
			
		||||
before they are committed. And they should follow the @ref{Coding Rules}.
 | 
			
		||||
The developer making the commit and the author are responsible for their changes
 | 
			
		||||
and should try to fix issues their commit causes.
 | 
			
		||||
 | 
			
		||||
@anchor{Coding Rules}
 | 
			
		||||
@section Coding Rules
 | 
			
		||||
 | 
			
		||||
@subsection Code formatting conventions
 | 
			
		||||
 | 
			
		||||
There are the following guidelines regarding the indentation in files:
 | 
			
		||||
FFmpeg is programmed in the ISO C90 language with a few additional
 | 
			
		||||
features from ISO C99, namely:
 | 
			
		||||
@itemize @bullet
 | 
			
		||||
@item
 | 
			
		||||
Indent size is 4.
 | 
			
		||||
the @samp{inline} keyword;
 | 
			
		||||
@item
 | 
			
		||||
@samp{//} comments;
 | 
			
		||||
@item
 | 
			
		||||
designated struct initializers (@samp{struct s x = @{ .i = 17 @};})
 | 
			
		||||
@item
 | 
			
		||||
compound literals (@samp{x = (struct s) @{ 17, 23 @};})
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
These features are supported by all compilers we care about, so we will not
 | 
			
		||||
accept patches to remove their use unless they absolutely do not impair
 | 
			
		||||
clarity and performance.
 | 
			
		||||
 | 
			
		||||
All code must compile with GCC 2.95 and GCC 3.3. Currently, FFmpeg also
 | 
			
		||||
compiles with several other compilers, such as the Compaq ccc compiler
 | 
			
		||||
or Sun Studio 9, and we would like to keep it that way unless it would
 | 
			
		||||
be exceedingly involved. To ensure compatibility, please do not use any
 | 
			
		||||
additional C99 features or GCC extensions. Especially watch out for:
 | 
			
		||||
@itemize @bullet
 | 
			
		||||
@item
 | 
			
		||||
mixing statements and declarations;
 | 
			
		||||
@item
 | 
			
		||||
@samp{long long} (use @samp{int64_t} instead);
 | 
			
		||||
@item
 | 
			
		||||
@samp{__attribute__} not protected by @samp{#ifdef __GNUC__} or similar;
 | 
			
		||||
@item
 | 
			
		||||
GCC statement expressions (@samp{(x = (@{ int y = 4; y; @})}).
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
Indent size is 4.
 | 
			
		||||
The presentation is one inspired by 'indent -i4 -kr -nut'.
 | 
			
		||||
The TAB character is forbidden outside of Makefiles as is any
 | 
			
		||||
form of trailing whitespace. Commits containing either will be
 | 
			
		||||
rejected by the git repository.
 | 
			
		||||
@item
 | 
			
		||||
You should try to limit your code lines to 80 characters; however, do so if
 | 
			
		||||
and only if this improves readability.
 | 
			
		||||
@end itemize
 | 
			
		||||
The presentation is one inspired by 'indent -i4 -kr -nut'.
 | 
			
		||||
rejected by the Subversion repository.
 | 
			
		||||
 | 
			
		||||
The main priority in FFmpeg is simplicity and small code size in order to
 | 
			
		||||
minimize the bug count.
 | 
			
		||||
 | 
			
		||||
@subsection Comments
 | 
			
		||||
Use the JavaDoc/Doxygen  format (see examples below) so that code documentation
 | 
			
		||||
Comments: Use the JavaDoc/Doxygen
 | 
			
		||||
format (see examples below) so that code documentation
 | 
			
		||||
can be generated automatically. All nontrivial functions should have a comment
 | 
			
		||||
above them explaining what the function does, even if it is just one sentence.
 | 
			
		||||
All structures and their member variables should be documented, too.
 | 
			
		||||
 | 
			
		||||
Avoid Qt-style and similar Doxygen syntax with @code{!} in it, i.e. replace
 | 
			
		||||
@code{//!} with @code{///} and similar.  Also @@ syntax should be employed
 | 
			
		||||
for markup commands, i.e. use @code{@@param} and not @code{\param}.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
/**
 | 
			
		||||
 * @@file
 | 
			
		||||
 * @@file mpeg.c
 | 
			
		||||
 * MPEG codec.
 | 
			
		||||
 * @@author ...
 | 
			
		||||
 */
 | 
			
		||||
@@ -113,105 +113,11 @@ int myfunc(int my_parameter)
 | 
			
		||||
...
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@subsection C language features
 | 
			
		||||
 | 
			
		||||
FFmpeg is programmed in the ISO C90 language with a few additional
 | 
			
		||||
features from ISO C99, namely:
 | 
			
		||||
@itemize @bullet
 | 
			
		||||
@item
 | 
			
		||||
the @samp{inline} keyword;
 | 
			
		||||
@item
 | 
			
		||||
@samp{//} comments;
 | 
			
		||||
@item
 | 
			
		||||
designated struct initializers (@samp{struct s x = @{ .i = 17 @};})
 | 
			
		||||
@item
 | 
			
		||||
compound literals (@samp{x = (struct s) @{ 17, 23 @};})
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
These features are supported by all compilers we care about, so we will not
 | 
			
		||||
accept patches to remove their use unless they absolutely do not impair
 | 
			
		||||
clarity and performance.
 | 
			
		||||
 | 
			
		||||
All code must compile with recent versions of GCC and a number of other
 | 
			
		||||
currently supported compilers. To ensure compatibility, please do not use
 | 
			
		||||
additional C99 features or GCC extensions. Especially watch out for:
 | 
			
		||||
@itemize @bullet
 | 
			
		||||
@item
 | 
			
		||||
mixing statements and declarations;
 | 
			
		||||
@item
 | 
			
		||||
@samp{long long} (use @samp{int64_t} instead);
 | 
			
		||||
@item
 | 
			
		||||
@samp{__attribute__} not protected by @samp{#ifdef __GNUC__} or similar;
 | 
			
		||||
@item
 | 
			
		||||
GCC statement expressions (@samp{(x = (@{ int y = 4; y; @})}).
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@subsection Naming conventions
 | 
			
		||||
All names are using underscores (_), not CamelCase. For example, @samp{avfilter_get_video_buffer} is
 | 
			
		||||
a valid function name and @samp{AVFilterGetVideo} is not. The exception from this are type names, like
 | 
			
		||||
for example structs and enums; they should always be in the CamelCase
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
There are following conventions for naming variables and functions:
 | 
			
		||||
@itemize @bullet
 | 
			
		||||
@item
 | 
			
		||||
For local variables no prefix is required.
 | 
			
		||||
@item
 | 
			
		||||
For variables and functions declared as @code{static} no prefixes are required.
 | 
			
		||||
@item
 | 
			
		||||
For variables and functions used internally by the library, @code{ff_} prefix
 | 
			
		||||
should be used.
 | 
			
		||||
For example, @samp{ff_w64_demuxer}.
 | 
			
		||||
@item
 | 
			
		||||
For variables and functions used internally across multiple libraries, use
 | 
			
		||||
@code{avpriv_}. For example, @samp{avpriv_aac_parse_header}.
 | 
			
		||||
@item
 | 
			
		||||
For exported names, each library has its own prefixes. Just check the existing
 | 
			
		||||
code and name accordingly.
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@subsection Miscellaneous conventions
 | 
			
		||||
@itemize @bullet
 | 
			
		||||
@item
 | 
			
		||||
fprintf and printf are forbidden in libavformat and libavcodec,
 | 
			
		||||
please use av_log() instead.
 | 
			
		||||
@item
 | 
			
		||||
 | 
			
		||||
Casts should be used only when necessary. Unneeded parentheses
 | 
			
		||||
should also be avoided if they don't make the code easier to understand.
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@subsection Editor configuration
 | 
			
		||||
In order to configure Vim to follow FFmpeg formatting conventions, paste
 | 
			
		||||
the following snippet into your @file{.vimrc}:
 | 
			
		||||
@example
 | 
			
		||||
" indentation rules for FFmpeg: 4 spaces, no tabs
 | 
			
		||||
set expandtab
 | 
			
		||||
set shiftwidth=4
 | 
			
		||||
set softtabstop=4
 | 
			
		||||
set cindent
 | 
			
		||||
set cinoptions=(0
 | 
			
		||||
" Allow tabs in Makefiles.
 | 
			
		||||
autocmd FileType make,automake set noexpandtab shiftwidth=8 softtabstop=8
 | 
			
		||||
" Trailing whitespace and tabs are forbidden, so highlight them.
 | 
			
		||||
highlight ForbiddenWhitespace ctermbg=red guibg=red
 | 
			
		||||
match ForbiddenWhitespace /\s\+$\|\t/
 | 
			
		||||
" Do not highlight spaces at the end of line while typing on that line.
 | 
			
		||||
autocmd InsertEnter * match ForbiddenWhitespace /\t\|\s\+\%#\@@<!$/
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
For Emacs, add these roughly equivalent lines to your @file{.emacs.d/init.el}:
 | 
			
		||||
@example
 | 
			
		||||
(c-add-style "ffmpeg"
 | 
			
		||||
             '("k&r"
 | 
			
		||||
               (c-basic-offset . 4)
 | 
			
		||||
               (indent-tabs-mode . nil)
 | 
			
		||||
               (show-trailing-whitespace . t)
 | 
			
		||||
               (c-offsets-alist
 | 
			
		||||
                (statement-cont . (c-lineup-assignments +)))
 | 
			
		||||
               )
 | 
			
		||||
             )
 | 
			
		||||
(setq c-default-style "ffmpeg")
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section Development Policy
 | 
			
		||||
 | 
			
		||||
@@ -243,9 +149,9 @@ For Emacs, add these roughly equivalent lines to your @file{.emacs.d/init.el}:
 | 
			
		||||
   Also if you have doubts about splitting or not splitting, do not hesitate to
 | 
			
		||||
   ask/discuss it on the developer mailing list.
 | 
			
		||||
@item
 | 
			
		||||
   Do not change behavior of the programs (renaming options etc) or public
 | 
			
		||||
   API or ABI without first discussing it on the ffmpeg-devel mailing list.
 | 
			
		||||
   Do not remove functionality from the code. Just improve!
 | 
			
		||||
   Do not change behavior of the program (renaming options etc) without
 | 
			
		||||
   first discussing it on the ffmpeg-devel mailing list. Do not remove
 | 
			
		||||
   functionality from the code. Just improve!
 | 
			
		||||
 | 
			
		||||
   Note: Redundant code can be removed.
 | 
			
		||||
@item
 | 
			
		||||
@@ -273,13 +179,10 @@ For Emacs, add these roughly equivalent lines to your @file{.emacs.d/init.el}:
 | 
			
		||||
   Always fill out the commit log message. Describe in a few lines what you
 | 
			
		||||
   changed and why. You can refer to mailing list postings if you fix a
 | 
			
		||||
   particular bug. Comments such as "fixed!" or "Changed it." are unacceptable.
 | 
			
		||||
   Recommended format:
 | 
			
		||||
   area changed: Short 1 line description
 | 
			
		||||
 | 
			
		||||
   details describing what and why and giving references.
 | 
			
		||||
@item
 | 
			
		||||
   Make sure the author of the commit is set correctly. (see git commit --author)
 | 
			
		||||
   If you apply a patch, send an
 | 
			
		||||
   If you apply a patch by someone else, include the name and email address in
 | 
			
		||||
   the log message. Since the ffmpeg-cvslog mailing list is publicly
 | 
			
		||||
   archived you should add some SPAM protection to the email address. Send an
 | 
			
		||||
   answer to ffmpeg-devel (or wherever you got the patch from) saying that
 | 
			
		||||
   you applied the patch.
 | 
			
		||||
@item
 | 
			
		||||
@@ -308,7 +211,7 @@ For Emacs, add these roughly equivalent lines to your @file{.emacs.d/init.el}:
 | 
			
		||||
    always check values read from some untrusted source before using them
 | 
			
		||||
    as array index or other risky things.
 | 
			
		||||
@item
 | 
			
		||||
    Remember to check if you need to bump versions for the specific libav*
 | 
			
		||||
    Remember to check if you need to bump versions for the specific libav
 | 
			
		||||
    parts (libavutil, libavcodec, libavformat) you are changing. You need
 | 
			
		||||
    to change the version integer.
 | 
			
		||||
    Incrementing the first component means no backward compatibility to
 | 
			
		||||
@@ -317,8 +220,7 @@ For Emacs, add these roughly equivalent lines to your @file{.emacs.d/init.el}:
 | 
			
		||||
    (e.g. addition of a function to the public API or extension of an
 | 
			
		||||
    existing data structure).
 | 
			
		||||
    Incrementing the third component means a noteworthy binary compatible
 | 
			
		||||
    change (e.g. encoder bug fix that matters for the decoder). The third
 | 
			
		||||
    component always starts at 100 to distinguish FFmpeg from Libav.
 | 
			
		||||
    change (e.g. encoder bug fix that matters for the decoder).
 | 
			
		||||
@item
 | 
			
		||||
    Compiler warnings indicate potential bugs or code with bad style. If a type of
 | 
			
		||||
    warning always points to correct and clean code, that warning should
 | 
			
		||||
@@ -336,14 +238,12 @@ We think our rules are not too hard. If you have comments, contact us.
 | 
			
		||||
 | 
			
		||||
Note, these rules are mostly borrowed from the MPlayer project.
 | 
			
		||||
 | 
			
		||||
@anchor{Submitting patches}
 | 
			
		||||
@section Submitting patches
 | 
			
		||||
 | 
			
		||||
First, read the @ref{Coding Rules} above if you did not yet, in particular
 | 
			
		||||
the rules regarding patch submission.
 | 
			
		||||
First, (@pxref{Coding Rules}) above if you did not yet.
 | 
			
		||||
 | 
			
		||||
When you submit your patch, please use @code{git format-patch} or
 | 
			
		||||
@code{git send-email}. We cannot read other diffs :-)
 | 
			
		||||
When you submit your patch, try to send a unified diff (diff '-up'
 | 
			
		||||
option). We cannot read other diffs :-)
 | 
			
		||||
 | 
			
		||||
Also please do not submit a patch which contains several unrelated changes.
 | 
			
		||||
Split it into separate, self-contained pieces. This does not mean splitting
 | 
			
		||||
@@ -355,13 +255,13 @@ for us and greatly increases your chances of getting your patch applied.
 | 
			
		||||
Use the patcheck tool of FFmpeg to check your patch.
 | 
			
		||||
The tool is located in the tools directory.
 | 
			
		||||
 | 
			
		||||
Run the @ref{Regression tests} before submitting a patch in order to verify
 | 
			
		||||
it does not cause unexpected problems.
 | 
			
		||||
Run the regression tests before submitting a patch so that you can
 | 
			
		||||
verify that there are no big problems.
 | 
			
		||||
 | 
			
		||||
Patches should be posted as base64 encoded attachments (or any other
 | 
			
		||||
encoding which ensures that the patch will not be trashed during
 | 
			
		||||
transmission) to the ffmpeg-devel mailing list, see
 | 
			
		||||
@url{http://lists.ffmpeg.org/mailman/listinfo/ffmpeg-devel}
 | 
			
		||||
@url{http://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-devel}
 | 
			
		||||
 | 
			
		||||
It also helps quite a bit if you tell us what the patch does (for example
 | 
			
		||||
'replaces lrint by lrintf'), and why (for example '*BSD isn't C99 compliant
 | 
			
		||||
@@ -389,16 +289,14 @@ send a reminder by email. Your patch should eventually be dealt with.
 | 
			
		||||
    Did you add a long_name under NULL_IF_CONFIG_SMALL to the AVCodec or
 | 
			
		||||
    AVInputFormat/AVOutputFormat struct?
 | 
			
		||||
@item
 | 
			
		||||
    Did you bump the minor version number (and reset the micro version
 | 
			
		||||
    number) in @file{libavcodec/version.h} or @file{libavformat/version.h}?
 | 
			
		||||
    Did you bump the minor version number in @file{avcodec.h} or
 | 
			
		||||
    @file{avformat.h}?
 | 
			
		||||
@item
 | 
			
		||||
    Did you register it in @file{allcodecs.c} or @file{allformats.c}?
 | 
			
		||||
@item
 | 
			
		||||
    Did you add the AVCodecID to @file{avcodec.h}?
 | 
			
		||||
    When adding new codec IDs, also add an entry to the codec descriptor
 | 
			
		||||
    list in @file{libavcodec/codec_desc.c}.
 | 
			
		||||
    Did you add the CodecID to @file{avcodec.h}?
 | 
			
		||||
@item
 | 
			
		||||
    If it has a fourCC, did you add it to @file{libavformat/riff.c},
 | 
			
		||||
    If it has a fourcc, did you add it to @file{libavformat/riff.c},
 | 
			
		||||
    even if it is only a decoder?
 | 
			
		||||
@item
 | 
			
		||||
    Did you add a rule to compile the appropriate files in the Makefile?
 | 
			
		||||
@@ -413,31 +311,22 @@ send a reminder by email. Your patch should eventually be dealt with.
 | 
			
		||||
    If it depends on a parser or a library, did you add that dependency in
 | 
			
		||||
    configure?
 | 
			
		||||
@item
 | 
			
		||||
    Did you @code{git add} the appropriate files before committing?
 | 
			
		||||
@item
 | 
			
		||||
    Did you make sure it compiles standalone, i.e. with
 | 
			
		||||
    @code{configure --disable-everything --enable-decoder=foo}
 | 
			
		||||
    (or @code{--enable-demuxer} or whatever your component is)?
 | 
			
		||||
    Did you "svn add" the appropriate files before commiting?
 | 
			
		||||
@end enumerate
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@section patch submission checklist
 | 
			
		||||
 | 
			
		||||
@enumerate
 | 
			
		||||
@item
 | 
			
		||||
    Does @code{make fate} pass with the patch applied?
 | 
			
		||||
    Do the regression tests pass with the patch applied?
 | 
			
		||||
@item
 | 
			
		||||
    Was the patch generated with git format-patch or send-email?
 | 
			
		||||
    Does @code{make checkheaders} pass with the patch applied?
 | 
			
		||||
@item
 | 
			
		||||
    Did you sign off your patch? (git commit -s)
 | 
			
		||||
    See @url{http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob_plain;f=Documentation/SubmittingPatches} for the meaning
 | 
			
		||||
    of sign off.
 | 
			
		||||
    Is the patch a unified diff?
 | 
			
		||||
@item
 | 
			
		||||
    Did you provide a clear git commit log message?
 | 
			
		||||
    Is the patch against latest FFmpeg SVN?
 | 
			
		||||
@item
 | 
			
		||||
    Is the patch against latest FFmpeg git master branch?
 | 
			
		||||
@item
 | 
			
		||||
    Are you subscribed to ffmpeg-devel?
 | 
			
		||||
    Are you subscribed to ffmpeg-dev?
 | 
			
		||||
    (the list is subscribers only due to spam)
 | 
			
		||||
@item
 | 
			
		||||
    Have you checked that the changes are minimal, so that the same cannot be
 | 
			
		||||
@@ -453,6 +342,9 @@ send a reminder by email. Your patch should eventually be dealt with.
 | 
			
		||||
    Did you test your decoder or demuxer against damaged data? If no, see
 | 
			
		||||
    tools/trasher and the noise bitstream filter. Your decoder or demuxer
 | 
			
		||||
    should not crash or end in a (near) infinite loop when fed damaged data.
 | 
			
		||||
@item
 | 
			
		||||
    Is the patch created from the root of the source tree, so it can be
 | 
			
		||||
    applied with @code{patch -p0}?
 | 
			
		||||
@item
 | 
			
		||||
    Does the patch not mix functional and cosmetic changes?
 | 
			
		||||
@item
 | 
			
		||||
@@ -489,19 +381,13 @@ send a reminder by email. Your patch should eventually be dealt with.
 | 
			
		||||
    Lines with similar content should be aligned vertically when doing so
 | 
			
		||||
    improves readability.
 | 
			
		||||
@item
 | 
			
		||||
    Consider to add a regression test for your code.
 | 
			
		||||
@item
 | 
			
		||||
    If you added YASM code please check that things still work with --disable-yasm
 | 
			
		||||
@item
 | 
			
		||||
    Make sure you check the return values of function and return appropriate
 | 
			
		||||
    error codes. Especially memory allocation functions like @code{av_malloc()}
 | 
			
		||||
    are notoriously left unchecked, which is a serious problem.
 | 
			
		||||
    Did you provide a suggestion for a clear commit log message?
 | 
			
		||||
@end enumerate
 | 
			
		||||
 | 
			
		||||
@section Patch review process
 | 
			
		||||
 | 
			
		||||
All patches posted to ffmpeg-devel will be reviewed, unless they contain a
 | 
			
		||||
clear note that the patch is not for the git master branch.
 | 
			
		||||
clear note that the patch is not for SVN.
 | 
			
		||||
Reviews and comments will be posted as replies to the patch on the
 | 
			
		||||
mailing list. The patch submitter then has to take care of every comment,
 | 
			
		||||
that can be by resubmitting a changed patch or by discussion. Resubmitted
 | 
			
		||||
@@ -514,38 +400,37 @@ After a patch is approved it will be committed to the repository.
 | 
			
		||||
We will review all submitted patches, but sometimes we are quite busy so
 | 
			
		||||
especially for large patches this can take several weeks.
 | 
			
		||||
 | 
			
		||||
If you feel that the review process is too slow and you are willing to try to
 | 
			
		||||
take over maintainership of the area of code you change then just clone
 | 
			
		||||
git master and maintain the area of code there. We will merge each area from
 | 
			
		||||
where its best maintained.
 | 
			
		||||
 | 
			
		||||
When resubmitting patches, please do not make any significant changes
 | 
			
		||||
not related to the comments received during review. Such patches will
 | 
			
		||||
be rejected. Instead, submit significant changes or new features as
 | 
			
		||||
be rejected. Instead, submit  significant changes or new features as
 | 
			
		||||
separate patches.
 | 
			
		||||
 | 
			
		||||
@anchor{Regression tests}
 | 
			
		||||
@section Regression tests
 | 
			
		||||
 | 
			
		||||
Before submitting a patch (or committing to the repository), you should at least
 | 
			
		||||
test that you did not break anything.
 | 
			
		||||
 | 
			
		||||
Running 'make fate' accomplishes this, please see @url{fate.html} for details.
 | 
			
		||||
The regression tests build a synthetic video stream and a synthetic
 | 
			
		||||
audio stream. These are then encoded and decoded with all codecs or
 | 
			
		||||
formats. The CRC (or MD5) of each generated file is recorded in a
 | 
			
		||||
result file. A 'diff' is launched to compare the reference results and
 | 
			
		||||
the result file. The output is checked immediately after each test
 | 
			
		||||
has run.
 | 
			
		||||
 | 
			
		||||
The regression tests then go on to test the FFserver code with a
 | 
			
		||||
limited set of streams. It is important that this step runs correctly
 | 
			
		||||
as well.
 | 
			
		||||
 | 
			
		||||
Run 'make test' to test all the codecs and formats. Commands like
 | 
			
		||||
'make regtest-mpeg2' can be used to run a single test. By default,
 | 
			
		||||
make will abort if any test fails. To run all tests regardless,
 | 
			
		||||
use make -k. To get a more verbose output, use 'make V=1 test' or
 | 
			
		||||
'make V=2 test'.
 | 
			
		||||
 | 
			
		||||
Run 'make fulltest' to test all the codecs, formats and FFserver.
 | 
			
		||||
 | 
			
		||||
[Of course, some patches may change the results of the regression tests. In
 | 
			
		||||
this case, the reference results of the regression tests shall be modified
 | 
			
		||||
accordingly].
 | 
			
		||||
 | 
			
		||||
@subsection Adding files to the fate-suite dataset
 | 
			
		||||
 | 
			
		||||
When there is no muxer or encoder available to generate test media for a
 | 
			
		||||
specific test then the media has to be inlcuded in the fate-suite.
 | 
			
		||||
First please make sure that the sample file is as small as possible to test the
 | 
			
		||||
respective decoder or demuxer sufficiently. Large files increase network
 | 
			
		||||
bandwidth and disk space requirements.
 | 
			
		||||
Once you have a working fate test and fate sample, provide in the commit
 | 
			
		||||
message or introductionary message for the patch series that you post to
 | 
			
		||||
the ffmpeg-devel mailing list, a direct link to download the sample media.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
 
 | 
			
		||||
@@ -1,14 +0,0 @@
 | 
			
		||||
#!/bin/sh
 | 
			
		||||
 | 
			
		||||
SRC_PATH="${1}"
 | 
			
		||||
DOXYFILE="${2}"
 | 
			
		||||
 | 
			
		||||
shift 2
 | 
			
		||||
 | 
			
		||||
doxygen - <<EOF
 | 
			
		||||
@INCLUDE        = ${DOXYFILE}
 | 
			
		||||
INPUT           = $@
 | 
			
		||||
HTML_HEADER     = ${SRC_PATH}/doc/doxy/header.html
 | 
			
		||||
HTML_FOOTER     = ${SRC_PATH}/doc/doxy/footer.html
 | 
			
		||||
HTML_STYLESHEET = ${SRC_PATH}/doc/doxy/doxy_stylesheet.css
 | 
			
		||||
EOF
 | 
			
		||||
										
											
												File diff suppressed because it is too large
												Load Diff
											
										
									
								
							@@ -1,9 +0,0 @@
 | 
			
		||||
 | 
			
		||||
 <footer class="footer pagination-right">
 | 
			
		||||
   <span class="label label-info">
 | 
			
		||||
    Generated on $datetime for $projectname by <a href="http://www.doxygen.org/index.html">doxygen</a> $doxygenversion
 | 
			
		||||
   </span>
 | 
			
		||||
 </footer>
 | 
			
		||||
</div>
 | 
			
		||||
</body>
 | 
			
		||||
</html>
 | 
			
		||||
@@ -1,16 +0,0 @@
 | 
			
		||||
<!DOCTYPE html>
 | 
			
		||||
<html>
 | 
			
		||||
<head>
 | 
			
		||||
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
 | 
			
		||||
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
 | 
			
		||||
<!--BEGIN PROJECT_NAME--><title>$projectname: $title</title><!--END PROJECT_NAME-->
 | 
			
		||||
<!--BEGIN !PROJECT_NAME--><title>$title</title><!--END !PROJECT_NAME-->
 | 
			
		||||
<link href="$relpath$doxy_stylesheet.css" rel="stylesheet" type="text/css" />
 | 
			
		||||
<!--Header replace -->
 | 
			
		||||
 | 
			
		||||
</head>
 | 
			
		||||
 | 
			
		||||
<div class="container">
 | 
			
		||||
 | 
			
		||||
<!--Header replace -->
 | 
			
		||||
<div class="menu">
 | 
			
		||||
							
								
								
									
										1111
									
								
								doc/encoders.texi
									
									
									
									
									
								
							
							
						
						
									
										1111
									
								
								doc/encoders.texi
									
									
									
									
									
								
							
										
											
												File diff suppressed because it is too large
												Load Diff
											
										
									
								
							
							
								
								
									
										174
									
								
								doc/errno.txt
									
									
									
									
									
								
							
							
						
						
									
										174
									
								
								doc/errno.txt
									
									
									
									
									
								
							@@ -1,174 +0,0 @@
 | 
			
		||||
The following table lists most error codes found in various operating
 | 
			
		||||
systems supported by FFmpeg.
 | 
			
		||||
 | 
			
		||||
                             OS
 | 
			
		||||
Code             Std    F  LBMWwb Text (YMMV)
 | 
			
		||||
 | 
			
		||||
E2BIG            POSIX     ++++++  Argument list too long
 | 
			
		||||
EACCES           POSIX     ++++++  Permission denied
 | 
			
		||||
EADDRINUSE       POSIX     +++..+  Address in use
 | 
			
		||||
EADDRNOTAVAIL    POSIX     +++..+  Cannot assign requested address
 | 
			
		||||
EADV                       +.....  Advertise error
 | 
			
		||||
EAFNOSUPPORT     POSIX     +++..+  Address family not supported
 | 
			
		||||
EAGAIN           POSIX  +  ++++++  Resource temporarily unavailable
 | 
			
		||||
EALREADY         POSIX     +++..+  Operation already in progress
 | 
			
		||||
EAUTH                      .++...  Authentication error
 | 
			
		||||
EBADARCH                   ..+...  Bad CPU type in executable
 | 
			
		||||
EBADE                      +.....  Invalid exchange
 | 
			
		||||
EBADEXEC                   ..+...  Bad executable
 | 
			
		||||
EBADF            POSIX     ++++++  Bad file descriptor
 | 
			
		||||
EBADFD                     +.....  File descriptor in bad state
 | 
			
		||||
EBADMACHO                  ..+...  Malformed Macho file
 | 
			
		||||
EBADMSG          POSIX     ++4...  Bad message
 | 
			
		||||
EBADR                      +.....  Invalid request descriptor
 | 
			
		||||
EBADRPC                    .++...  RPC struct is bad
 | 
			
		||||
EBADRQC                    +.....  Invalid request code
 | 
			
		||||
EBADSLT                    +.....  Invalid slot
 | 
			
		||||
EBFONT                     +.....  Bad font file format
 | 
			
		||||
EBUSY            POSIX  -  ++++++  Device or resource busy
 | 
			
		||||
ECANCELED        POSIX     +++...  Operation canceled
 | 
			
		||||
ECHILD           POSIX     ++++++  No child processes
 | 
			
		||||
ECHRNG                     +.....  Channel number out of range
 | 
			
		||||
ECOMM                      +.....  Communication error on send
 | 
			
		||||
ECONNABORTED     POSIX     +++..+  Software caused connection abort
 | 
			
		||||
ECONNREFUSED     POSIX  -  +++ss+  Connection refused
 | 
			
		||||
ECONNRESET       POSIX     +++..+  Connection reset
 | 
			
		||||
EDEADLK          POSIX     ++++++  Resource deadlock avoided
 | 
			
		||||
EDEADLOCK                  +..++.  File locking deadlock error
 | 
			
		||||
EDESTADDRREQ     POSIX     +++...  Destination address required
 | 
			
		||||
EDEVERR                    ..+...  Device error
 | 
			
		||||
EDOM             C89    -  ++++++  Numerical argument out of domain
 | 
			
		||||
EDOOFUS                    .F....  Programming error
 | 
			
		||||
EDOTDOT                    +.....  RFS specific error
 | 
			
		||||
EDQUOT           POSIX     +++...  Disc quota exceeded
 | 
			
		||||
EEXIST           POSIX     ++++++  File exists
 | 
			
		||||
EFAULT           POSIX  -  ++++++  Bad address
 | 
			
		||||
EFBIG            POSIX  -  ++++++  File too large
 | 
			
		||||
EFTYPE                     .++...  Inappropriate file type or format
 | 
			
		||||
EHOSTDOWN                  +++...  Host is down
 | 
			
		||||
EHOSTUNREACH     POSIX     +++..+  No route to host
 | 
			
		||||
EHWPOISON                  +.....  Memory page has hardware error
 | 
			
		||||
EIDRM            POSIX     +++...  Identifier removed
 | 
			
		||||
EILSEQ           C99       ++++++  Illegal byte sequence
 | 
			
		||||
EINPROGRESS      POSIX  -  +++ss+  Operation in progress
 | 
			
		||||
EINTR            POSIX  -  ++++++  Interrupted system call
 | 
			
		||||
EINVAL           POSIX  +  ++++++  Invalid argument
 | 
			
		||||
EIO              POSIX  +  ++++++  I/O error
 | 
			
		||||
EISCONN          POSIX     +++..+  Socket is already connected
 | 
			
		||||
EISDIR           POSIX     ++++++  Is a directory
 | 
			
		||||
EISNAM                     +.....  Is a named type file
 | 
			
		||||
EKEYEXPIRED                +.....  Key has expired
 | 
			
		||||
EKEYREJECTED               +.....  Key was rejected by service
 | 
			
		||||
EKEYREVOKED                +.....  Key has been revoked
 | 
			
		||||
EL2HLT                     +.....  Level 2 halted
 | 
			
		||||
EL2NSYNC                   +.....  Level 2 not synchronized
 | 
			
		||||
EL3HLT                     +.....  Level 3 halted
 | 
			
		||||
EL3RST                     +.....  Level 3 reset
 | 
			
		||||
ELIBACC                    +.....  Can not access a needed shared library
 | 
			
		||||
ELIBBAD                    +.....  Accessing a corrupted shared library
 | 
			
		||||
ELIBEXEC                   +.....  Cannot exec a shared library directly
 | 
			
		||||
ELIBMAX                    +.....  Too many shared libraries
 | 
			
		||||
ELIBSCN                    +.....  .lib section in a.out corrupted
 | 
			
		||||
ELNRNG                     +.....  Link number out of range
 | 
			
		||||
ELOOP            POSIX     +++..+  Too many levels of symbolic links
 | 
			
		||||
EMEDIUMTYPE                +.....  Wrong medium type
 | 
			
		||||
EMFILE           POSIX     ++++++  Too many open files
 | 
			
		||||
EMLINK           POSIX     ++++++  Too many links
 | 
			
		||||
EMSGSIZE         POSIX     +++..+  Message too long
 | 
			
		||||
EMULTIHOP        POSIX     ++4...  Multihop attempted
 | 
			
		||||
ENAMETOOLONG     POSIX  -  ++++++  Filen ame too long
 | 
			
		||||
ENAVAIL                    +.....  No XENIX semaphores available
 | 
			
		||||
ENEEDAUTH                  .++...  Need authenticator
 | 
			
		||||
ENETDOWN         POSIX     +++..+  Network is down
 | 
			
		||||
ENETRESET        SUSv3     +++..+  Network dropped connection on reset
 | 
			
		||||
ENETUNREACH      POSIX     +++..+  Network unreachable
 | 
			
		||||
ENFILE           POSIX     ++++++  Too many open files in system
 | 
			
		||||
ENOANO                     +.....  No anode
 | 
			
		||||
ENOATTR                    .++...  Attribute not found
 | 
			
		||||
ENOBUFS          POSIX  -  +++..+  No buffer space available
 | 
			
		||||
ENOCSI                     +.....  No CSI structure available
 | 
			
		||||
ENODATA          XSR       +N4...  No message available
 | 
			
		||||
ENODEV           POSIX  -  ++++++  No such device
 | 
			
		||||
ENOENT           POSIX  -  ++++++  No such file or directory
 | 
			
		||||
ENOEXEC          POSIX     ++++++  Exec format error
 | 
			
		||||
ENOFILE                    ...++.  No such file or directory
 | 
			
		||||
ENOKEY                     +.....  Required key not available
 | 
			
		||||
ENOLCK           POSIX     ++++++  No locks available
 | 
			
		||||
ENOLINK          POSIX     ++4...  Link has been severed
 | 
			
		||||
ENOMEDIUM                  +.....  No medium found
 | 
			
		||||
ENOMEM           POSIX     ++++++  Not enough space
 | 
			
		||||
ENOMSG           POSIX     +++..+  No message of desired type
 | 
			
		||||
ENONET                     +.....  Machine is not on the network
 | 
			
		||||
ENOPKG                     +.....  Package not installed
 | 
			
		||||
ENOPROTOOPT      POSIX     +++..+  Protocol not available
 | 
			
		||||
ENOSPC           POSIX     ++++++  No space left on device
 | 
			
		||||
ENOSR            XSR       +N4...  No STREAM resources
 | 
			
		||||
ENOSTR           XSR       +N4...  Not a STREAM
 | 
			
		||||
ENOSYS           POSIX  +  ++++++  Function not implemented
 | 
			
		||||
ENOTBLK                    +++...  Block device required
 | 
			
		||||
ENOTCONN         POSIX     +++..+  Socket is not connected
 | 
			
		||||
ENOTDIR          POSIX     ++++++  Not a directory
 | 
			
		||||
ENOTEMPTY        POSIX     ++++++  Directory not empty
 | 
			
		||||
ENOTNAM                    +.....  Not a XENIX named type file
 | 
			
		||||
ENOTRECOVERABLE  SUSv4  -  +.....  State not recoverable
 | 
			
		||||
ENOTSOCK         POSIX     +++..+  Socket operation on non-socket
 | 
			
		||||
ENOTSUP          POSIX     +++...  Operation not supported
 | 
			
		||||
ENOTTY           POSIX     ++++++  Inappropriate I/O control operation
 | 
			
		||||
ENOTUNIQ                   +.....  Name not unique on network
 | 
			
		||||
ENXIO            POSIX     ++++++  No such device or address
 | 
			
		||||
EOPNOTSUPP       POSIX     +++..+  Operation not supported (on socket)
 | 
			
		||||
EOVERFLOW        POSIX     +++..+  Value too large to be stored in data type
 | 
			
		||||
EOWNERDEAD       SUSv4     +.....  Owner died
 | 
			
		||||
EPERM            POSIX  -  ++++++  Operation not permitted
 | 
			
		||||
EPFNOSUPPORT               +++..+  Protocol family not supported
 | 
			
		||||
EPIPE            POSIX  -  ++++++  Broken pipe
 | 
			
		||||
EPROCLIM                   .++...  Too many processes
 | 
			
		||||
EPROCUNAVAIL               .++...  Bad procedure for program
 | 
			
		||||
EPROGMISMATCH              .++...  Program version wrong
 | 
			
		||||
EPROGUNAVAIL               .++...  RPC prog. not avail
 | 
			
		||||
EPROTO           POSIX     ++4...  Protocol error
 | 
			
		||||
EPROTONOSUPPORT  POSIX  -  +++ss+  Protocol not supported
 | 
			
		||||
EPROTOTYPE       POSIX     +++..+  Protocol wrong type for socket
 | 
			
		||||
EPWROFF                    ..+...  Device power is off
 | 
			
		||||
ERANGE           C89    -  ++++++  Result too large
 | 
			
		||||
EREMCHG                    +.....  Remote address changed
 | 
			
		||||
EREMOTE                    +++...  Object is remote
 | 
			
		||||
EREMOTEIO                  +.....  Remote I/O error
 | 
			
		||||
ERESTART                   +.....  Interrupted system call should be restarted
 | 
			
		||||
ERFKILL                    +.....  Operation not possible due to RF-kill
 | 
			
		||||
EROFS            POSIX     ++++++  Read-only file system
 | 
			
		||||
ERPCMISMATCH               .++...  RPC version wrong
 | 
			
		||||
ESHLIBVERS                 ..+...  Shared library version mismatch
 | 
			
		||||
ESHUTDOWN                  +++..+  Cannot send after socket shutdown
 | 
			
		||||
ESOCKTNOSUPPORT            +++...  Socket type not supported
 | 
			
		||||
ESPIPE           POSIX     ++++++  Illegal seek
 | 
			
		||||
ESRCH            POSIX     ++++++  No such process
 | 
			
		||||
ESRMNT                     +.....  Srmount error
 | 
			
		||||
ESTALE           POSIX     +++..+  Stale NFS file handle
 | 
			
		||||
ESTRPIPE                   +.....  Streams pipe error
 | 
			
		||||
ETIME            XSR       +N4...  Stream ioctl timeout
 | 
			
		||||
ETIMEDOUT        POSIX  -  +++ss+  Connection timed out
 | 
			
		||||
ETOOMANYREFS               +++...  Too many references: cannot splice
 | 
			
		||||
ETXTBSY          POSIX     +++...  Text file busy
 | 
			
		||||
EUCLEAN                    +.....  Structure needs cleaning
 | 
			
		||||
EUNATCH                    +.....  Protocol driver not attached
 | 
			
		||||
EUSERS                     +++...  Too many users
 | 
			
		||||
EWOULDBLOCK      POSIX     +++..+  Operation would block
 | 
			
		||||
EXDEV            POSIX     ++++++  Cross-device link
 | 
			
		||||
EXFULL                     +.....  Exchange full
 | 
			
		||||
 | 
			
		||||
Notations:
 | 
			
		||||
 | 
			
		||||
F: used in FFmpeg (-: a few times, +: a lot)
 | 
			
		||||
 | 
			
		||||
SUSv3: Single Unix Specification, version 3
 | 
			
		||||
SUSv4: Single Unix Specification, version 4
 | 
			
		||||
XSR: XSI STREAMS (obsolete)
 | 
			
		||||
 | 
			
		||||
OS: availability on some supported operating systems
 | 
			
		||||
L: GNU/Linux
 | 
			
		||||
B: BSD (F: FreeBSD, N: NetBSD)
 | 
			
		||||
M: MacOS X
 | 
			
		||||
W: Microsoft Windows (s: emulated with winsock, see libavformat/network.h)
 | 
			
		||||
w: Mingw32 (3.17) and Mingw64 (2.0.1)
 | 
			
		||||
b: BeOS
 | 
			
		||||
							
								
								
									
										252
									
								
								doc/eval.texi
									
									
									
									
									
								
							
							
						
						
									
										252
									
								
								doc/eval.texi
									
									
									
									
									
								
							@@ -1,252 +0,0 @@
 | 
			
		||||
@chapter Expression Evaluation
 | 
			
		||||
@c man begin EXPRESSION EVALUATION
 | 
			
		||||
 | 
			
		||||
When evaluating an arithmetic expression, FFmpeg uses an internal
 | 
			
		||||
formula evaluator, implemented through the @file{libavutil/eval.h}
 | 
			
		||||
interface.
 | 
			
		||||
 | 
			
		||||
An expression may contain unary, binary operators, constants, and
 | 
			
		||||
functions.
 | 
			
		||||
 | 
			
		||||
Two expressions @var{expr1} and @var{expr2} can be combined to form
 | 
			
		||||
another expression "@var{expr1};@var{expr2}".
 | 
			
		||||
@var{expr1} and @var{expr2} are evaluated in turn, and the new
 | 
			
		||||
expression evaluates to the value of @var{expr2}.
 | 
			
		||||
 | 
			
		||||
The following binary operators are available: @code{+}, @code{-},
 | 
			
		||||
@code{*}, @code{/}, @code{^}.
 | 
			
		||||
 | 
			
		||||
The following unary operators are available: @code{+}, @code{-}.
 | 
			
		||||
 | 
			
		||||
The following functions are available:
 | 
			
		||||
@table @option
 | 
			
		||||
@item sinh(x)
 | 
			
		||||
Compute hyperbolic sine of @var{x}.
 | 
			
		||||
 | 
			
		||||
@item cosh(x)
 | 
			
		||||
Compute hyperbolic cosine of @var{x}.
 | 
			
		||||
 | 
			
		||||
@item tanh(x)
 | 
			
		||||
Compute hyperbolic tangent of @var{x}.
 | 
			
		||||
 | 
			
		||||
@item sin(x)
 | 
			
		||||
Compute sine of @var{x}.
 | 
			
		||||
 | 
			
		||||
@item cos(x)
 | 
			
		||||
Compute cosine of @var{x}.
 | 
			
		||||
 | 
			
		||||
@item tan(x)
 | 
			
		||||
Compute tangent of @var{x}.
 | 
			
		||||
 | 
			
		||||
@item atan(x)
 | 
			
		||||
Compute arctangent of @var{x}.
 | 
			
		||||
 | 
			
		||||
@item asin(x)
 | 
			
		||||
Compute arcsine of @var{x}.
 | 
			
		||||
 | 
			
		||||
@item acos(x)
 | 
			
		||||
Compute arccosine of @var{x}.
 | 
			
		||||
 | 
			
		||||
@item exp(x)
 | 
			
		||||
Compute exponential of @var{x} (with base @code{e}, the Euler's number).
 | 
			
		||||
 | 
			
		||||
@item log(x)
 | 
			
		||||
Compute natural logarithm of @var{x}.
 | 
			
		||||
 | 
			
		||||
@item abs(x)
 | 
			
		||||
Compute absolute value of @var{x}.
 | 
			
		||||
 | 
			
		||||
@item squish(x)
 | 
			
		||||
Compute expression @code{1/(1 + exp(4*x))}.
 | 
			
		||||
 | 
			
		||||
@item gauss(x)
 | 
			
		||||
Compute Gauss function of @var{x}, corresponding to
 | 
			
		||||
@code{exp(-x*x/2) / sqrt(2*PI)}.
 | 
			
		||||
 | 
			
		||||
@item isinf(x)
 | 
			
		||||
Return 1.0 if @var{x} is +/-INFINITY, 0.0 otherwise.
 | 
			
		||||
 | 
			
		||||
@item isnan(x)
 | 
			
		||||
Return 1.0 if @var{x} is NAN, 0.0 otherwise.
 | 
			
		||||
 | 
			
		||||
@item mod(x, y)
 | 
			
		||||
Compute the remainder of division of @var{x} by @var{y}.
 | 
			
		||||
 | 
			
		||||
@item max(x, y)
 | 
			
		||||
Return the maximum between @var{x} and @var{y}.
 | 
			
		||||
 | 
			
		||||
@item min(x, y)
 | 
			
		||||
Return the maximum between @var{x} and @var{y}.
 | 
			
		||||
 | 
			
		||||
@item eq(x, y)
 | 
			
		||||
Return 1 if @var{x} and @var{y} are equivalent, 0 otherwise.
 | 
			
		||||
 | 
			
		||||
@item gte(x, y)
 | 
			
		||||
Return 1 if @var{x} is greater than or equal to @var{y}, 0 otherwise.
 | 
			
		||||
 | 
			
		||||
@item gt(x, y)
 | 
			
		||||
Return 1 if @var{x} is greater than @var{y}, 0 otherwise.
 | 
			
		||||
 | 
			
		||||
@item lte(x, y)
 | 
			
		||||
Return 1 if @var{x} is lesser than or equal to @var{y}, 0 otherwise.
 | 
			
		||||
 | 
			
		||||
@item lt(x, y)
 | 
			
		||||
Return 1 if @var{x} is lesser than @var{y}, 0 otherwise.
 | 
			
		||||
 | 
			
		||||
@item st(var, expr)
 | 
			
		||||
Allow to store the value of the expression @var{expr} in an internal
 | 
			
		||||
variable. @var{var} specifies the number of the variable where to
 | 
			
		||||
store the value, and it is a value ranging from 0 to 9. The function
 | 
			
		||||
returns the value stored in the internal variable.
 | 
			
		||||
Note, Variables are currently not shared between expressions.
 | 
			
		||||
 | 
			
		||||
@item ld(var)
 | 
			
		||||
Allow to load the value of the internal variable with number
 | 
			
		||||
@var{var}, which was previously stored with st(@var{var}, @var{expr}).
 | 
			
		||||
The function returns the loaded value.
 | 
			
		||||
 | 
			
		||||
@item while(cond, expr)
 | 
			
		||||
Evaluate expression @var{expr} while the expression @var{cond} is
 | 
			
		||||
non-zero, and returns the value of the last @var{expr} evaluation, or
 | 
			
		||||
NAN if @var{cond} was always false.
 | 
			
		||||
 | 
			
		||||
@item ceil(expr)
 | 
			
		||||
Round the value of expression @var{expr} upwards to the nearest
 | 
			
		||||
integer. For example, "ceil(1.5)" is "2.0".
 | 
			
		||||
 | 
			
		||||
@item floor(expr)
 | 
			
		||||
Round the value of expression @var{expr} downwards to the nearest
 | 
			
		||||
integer. For example, "floor(-1.5)" is "-2.0".
 | 
			
		||||
 | 
			
		||||
@item trunc(expr)
 | 
			
		||||
Round the value of expression @var{expr} towards zero to the nearest
 | 
			
		||||
integer. For example, "trunc(-1.5)" is "-1.0".
 | 
			
		||||
 | 
			
		||||
@item sqrt(expr)
 | 
			
		||||
Compute the square root of @var{expr}. This is equivalent to
 | 
			
		||||
"(@var{expr})^.5".
 | 
			
		||||
 | 
			
		||||
@item not(expr)
 | 
			
		||||
Return 1.0 if @var{expr} is zero, 0.0 otherwise.
 | 
			
		||||
 | 
			
		||||
@item pow(x, y)
 | 
			
		||||
Compute the power of @var{x} elevated @var{y}, it is equivalent to
 | 
			
		||||
"(@var{x})^(@var{y})".
 | 
			
		||||
 | 
			
		||||
@item random(x)
 | 
			
		||||
Return a pseudo random value between 0.0 and 1.0. @var{x} is the index of the
 | 
			
		||||
internal variable which will be used to save the seed/state.
 | 
			
		||||
 | 
			
		||||
@item hypot(x, y)
 | 
			
		||||
This function is similar to the C function with the same name; it returns
 | 
			
		||||
"sqrt(@var{x}*@var{x} + @var{y}*@var{y})", the length of the hypotenuse of a
 | 
			
		||||
right triangle with sides of length @var{x} and @var{y}, or the distance of the
 | 
			
		||||
point (@var{x}, @var{y}) from the origin.
 | 
			
		||||
 | 
			
		||||
@item gcd(x, y)
 | 
			
		||||
Return the greatest common divisor of @var{x} and @var{y}. If both @var{x} and
 | 
			
		||||
@var{y} are 0 or either or both are less than zero then behavior is undefined.
 | 
			
		||||
 | 
			
		||||
@item if(x, y)
 | 
			
		||||
Evaluate @var{x}, and if the result is non-zero return the result of
 | 
			
		||||
the evaluation of @var{y}, return 0 otherwise.
 | 
			
		||||
 | 
			
		||||
@item ifnot(x, y)
 | 
			
		||||
Evaluate @var{x}, and if the result is zero return the result of the
 | 
			
		||||
evaluation of @var{y}, return 0 otherwise.
 | 
			
		||||
 | 
			
		||||
@item taylor(expr, x) taylor(expr, x, id)
 | 
			
		||||
Evaluate a taylor series at x.
 | 
			
		||||
expr represents the LD(id)-th derivates of f(x) at 0. If id is not specified
 | 
			
		||||
then 0 is assumed.
 | 
			
		||||
note, when you have the derivatives at y instead of 0
 | 
			
		||||
taylor(expr, x-y) can be used
 | 
			
		||||
When the series does not converge the results are undefined.
 | 
			
		||||
 | 
			
		||||
@item root(expr, max)
 | 
			
		||||
Finds x where f(x)=0 in the interval 0..max.
 | 
			
		||||
f() must be continuous or the result is undefined.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
The following constants are available:
 | 
			
		||||
@table @option
 | 
			
		||||
@item PI
 | 
			
		||||
area of the unit disc, approximately 3.14
 | 
			
		||||
@item E
 | 
			
		||||
exp(1) (Euler's number), approximately 2.718
 | 
			
		||||
@item PHI
 | 
			
		||||
golden ratio (1+sqrt(5))/2, approximately 1.618
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
Assuming that an expression is considered "true" if it has a non-zero
 | 
			
		||||
value, note that:
 | 
			
		||||
 | 
			
		||||
@code{*} works like AND
 | 
			
		||||
 | 
			
		||||
@code{+} works like OR
 | 
			
		||||
 | 
			
		||||
and the construct:
 | 
			
		||||
@example
 | 
			
		||||
if A then B else C
 | 
			
		||||
@end example
 | 
			
		||||
is equivalent to
 | 
			
		||||
@example
 | 
			
		||||
if(A,B) + ifnot(A,C)
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
In your C code, you can extend the list of unary and binary functions,
 | 
			
		||||
and define recognized constants, so that they are available for your
 | 
			
		||||
expressions.
 | 
			
		||||
 | 
			
		||||
The evaluator also recognizes the International System number
 | 
			
		||||
postfixes. If 'i' is appended after the postfix, powers of 2 are used
 | 
			
		||||
instead of powers of 10. The 'B' postfix multiplies the value for 8,
 | 
			
		||||
and can be appended after another postfix or used alone. This allows
 | 
			
		||||
using for example 'KB', 'MiB', 'G' and 'B' as postfix.
 | 
			
		||||
 | 
			
		||||
Follows the list of available International System postfixes, with
 | 
			
		||||
indication of the corresponding powers of 10 and of 2.
 | 
			
		||||
@table @option
 | 
			
		||||
@item y
 | 
			
		||||
-24 / -80
 | 
			
		||||
@item z
 | 
			
		||||
-21 / -70
 | 
			
		||||
@item a
 | 
			
		||||
-18 / -60
 | 
			
		||||
@item f
 | 
			
		||||
-15 / -50
 | 
			
		||||
@item p
 | 
			
		||||
-12 / -40
 | 
			
		||||
@item n
 | 
			
		||||
-9 / -30
 | 
			
		||||
@item u
 | 
			
		||||
-6 / -20
 | 
			
		||||
@item m
 | 
			
		||||
-3 / -10
 | 
			
		||||
@item c
 | 
			
		||||
-2
 | 
			
		||||
@item d
 | 
			
		||||
-1
 | 
			
		||||
@item h
 | 
			
		||||
2
 | 
			
		||||
@item k
 | 
			
		||||
3 / 10
 | 
			
		||||
@item K
 | 
			
		||||
3 / 10
 | 
			
		||||
@item M
 | 
			
		||||
6 / 20
 | 
			
		||||
@item G
 | 
			
		||||
9 / 30
 | 
			
		||||
@item T
 | 
			
		||||
12 / 40
 | 
			
		||||
@item P
 | 
			
		||||
15 / 40
 | 
			
		||||
@item E
 | 
			
		||||
18 / 50
 | 
			
		||||
@item Z
 | 
			
		||||
21 / 60
 | 
			
		||||
@item Y
 | 
			
		||||
24 / 70
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@c man end
 | 
			
		||||
@@ -1,37 +0,0 @@
 | 
			
		||||
# use pkg-config for getting CFLAGS and LDLIBS
 | 
			
		||||
FFMPEG_LIBS=    libavdevice                        \
 | 
			
		||||
                libavformat                        \
 | 
			
		||||
                libavfilter                        \
 | 
			
		||||
                libavcodec                         \
 | 
			
		||||
                libswresample                      \
 | 
			
		||||
                libswscale                         \
 | 
			
		||||
                libavutil                          \
 | 
			
		||||
 | 
			
		||||
CFLAGS += -Wall -O2 -g
 | 
			
		||||
CFLAGS := $(shell pkg-config --cflags $(FFMPEG_LIBS)) $(CFLAGS)
 | 
			
		||||
LDLIBS := $(shell pkg-config --libs $(FFMPEG_LIBS)) $(LDLIBS)
 | 
			
		||||
 | 
			
		||||
EXAMPLES=       decoding_encoding                  \
 | 
			
		||||
                demuxing                           \
 | 
			
		||||
                filtering_video                    \
 | 
			
		||||
                filtering_audio                    \
 | 
			
		||||
                metadata                           \
 | 
			
		||||
                muxing                             \
 | 
			
		||||
                resampling_audio                   \
 | 
			
		||||
                scaling_video                      \
 | 
			
		||||
 | 
			
		||||
OBJS=$(addsuffix .o,$(EXAMPLES))
 | 
			
		||||
 | 
			
		||||
# the following examples make explicit use of the math library
 | 
			
		||||
decoding_encoding: LDLIBS += -lm
 | 
			
		||||
muxing:            LDLIBS += -lm
 | 
			
		||||
 | 
			
		||||
.phony: all clean-test clean
 | 
			
		||||
 | 
			
		||||
all: $(OBJS) $(EXAMPLES)
 | 
			
		||||
 | 
			
		||||
clean-test:
 | 
			
		||||
	$(RM) test*.pgm test.h264 test.mp2 test.sw test.mpg
 | 
			
		||||
 | 
			
		||||
clean: clean-test
 | 
			
		||||
	$(RM) $(EXAMPLES) $(OBJS)
 | 
			
		||||
@@ -1,18 +0,0 @@
 | 
			
		||||
FFmpeg examples README
 | 
			
		||||
----------------------
 | 
			
		||||
 | 
			
		||||
Both following use cases rely on pkg-config and make, thus make sure
 | 
			
		||||
that you have them installed and working on your system.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
1) Build the installed examples in a generic read/write user directory
 | 
			
		||||
 | 
			
		||||
Copy to a read/write user directory and just use "make", it will link
 | 
			
		||||
to the libraries on your system, assuming the PKG_CONFIG_PATH is
 | 
			
		||||
correctly configured.
 | 
			
		||||
 | 
			
		||||
2) Build the examples in-tree
 | 
			
		||||
 | 
			
		||||
Assuming you are in the source FFmpeg checkout directory, you need to build
 | 
			
		||||
FFmpeg (no need to make install in any prefix). Then you can go into the
 | 
			
		||||
doc/examples and run a command such as PKG_CONFIG_PATH=pc-uninstalled make.
 | 
			
		||||
@@ -1,650 +0,0 @@
 | 
			
		||||
/*
 | 
			
		||||
 * Copyright (c) 2001 Fabrice Bellard
 | 
			
		||||
 *
 | 
			
		||||
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 | 
			
		||||
 * of this software and associated documentation files (the "Software"), to deal
 | 
			
		||||
 * in the Software without restriction, including without limitation the rights
 | 
			
		||||
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 | 
			
		||||
 * copies of the Software, and to permit persons to whom the Software is
 | 
			
		||||
 * furnished to do so, subject to the following conditions:
 | 
			
		||||
 *
 | 
			
		||||
 * The above copyright notice and this permission notice shall be included in
 | 
			
		||||
 * all copies or substantial portions of the Software.
 | 
			
		||||
 *
 | 
			
		||||
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 | 
			
		||||
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 | 
			
		||||
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 | 
			
		||||
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 | 
			
		||||
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 | 
			
		||||
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 | 
			
		||||
 * THE SOFTWARE.
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * @file
 | 
			
		||||
 * libavcodec API use example.
 | 
			
		||||
 *
 | 
			
		||||
 * Note that libavcodec only handles codecs (mpeg, mpeg4, etc...),
 | 
			
		||||
 * not file formats (avi, vob, mp4, mov, mkv, mxf, flv, mpegts, mpegps, etc...). See library 'libavformat' for the
 | 
			
		||||
 * format handling
 | 
			
		||||
 * @example doc/examples/decoding_encoding.c
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
#include <math.h>
 | 
			
		||||
 | 
			
		||||
#include <libavutil/opt.h>
 | 
			
		||||
#include <libavcodec/avcodec.h>
 | 
			
		||||
#include <libavutil/channel_layout.h>
 | 
			
		||||
#include <libavutil/common.h>
 | 
			
		||||
#include <libavutil/imgutils.h>
 | 
			
		||||
#include <libavutil/mathematics.h>
 | 
			
		||||
#include <libavutil/samplefmt.h>
 | 
			
		||||
 | 
			
		||||
#define INBUF_SIZE 4096
 | 
			
		||||
#define AUDIO_INBUF_SIZE 20480
 | 
			
		||||
#define AUDIO_REFILL_THRESH 4096
 | 
			
		||||
 | 
			
		||||
/* check that a given sample format is supported by the encoder */
 | 
			
		||||
static int check_sample_fmt(AVCodec *codec, enum AVSampleFormat sample_fmt)
 | 
			
		||||
{
 | 
			
		||||
    const enum AVSampleFormat *p = codec->sample_fmts;
 | 
			
		||||
 | 
			
		||||
    while (*p != AV_SAMPLE_FMT_NONE) {
 | 
			
		||||
        if (*p == sample_fmt)
 | 
			
		||||
            return 1;
 | 
			
		||||
        p++;
 | 
			
		||||
    }
 | 
			
		||||
    return 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
/* just pick the highest supported samplerate */
 | 
			
		||||
static int select_sample_rate(AVCodec *codec)
 | 
			
		||||
{
 | 
			
		||||
    const int *p;
 | 
			
		||||
    int best_samplerate = 0;
 | 
			
		||||
 | 
			
		||||
    if (!codec->supported_samplerates)
 | 
			
		||||
        return 44100;
 | 
			
		||||
 | 
			
		||||
    p = codec->supported_samplerates;
 | 
			
		||||
    while (*p) {
 | 
			
		||||
        best_samplerate = FFMAX(*p, best_samplerate);
 | 
			
		||||
        p++;
 | 
			
		||||
    }
 | 
			
		||||
    return best_samplerate;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
/* select layout with the highest channel count */
 | 
			
		||||
static int select_channel_layout(AVCodec *codec)
 | 
			
		||||
{
 | 
			
		||||
    const uint64_t *p;
 | 
			
		||||
    uint64_t best_ch_layout = 0;
 | 
			
		||||
    int best_nb_channells   = 0;
 | 
			
		||||
 | 
			
		||||
    if (!codec->channel_layouts)
 | 
			
		||||
        return AV_CH_LAYOUT_STEREO;
 | 
			
		||||
 | 
			
		||||
    p = codec->channel_layouts;
 | 
			
		||||
    while (*p) {
 | 
			
		||||
        int nb_channels = av_get_channel_layout_nb_channels(*p);
 | 
			
		||||
 | 
			
		||||
        if (nb_channels > best_nb_channells) {
 | 
			
		||||
            best_ch_layout    = *p;
 | 
			
		||||
            best_nb_channells = nb_channels;
 | 
			
		||||
        }
 | 
			
		||||
        p++;
 | 
			
		||||
    }
 | 
			
		||||
    return best_ch_layout;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
/*
 | 
			
		||||
 * Audio encoding example
 | 
			
		||||
 */
 | 
			
		||||
static void audio_encode_example(const char *filename)
 | 
			
		||||
{
 | 
			
		||||
    AVCodec *codec;
 | 
			
		||||
    AVCodecContext *c= NULL;
 | 
			
		||||
    AVFrame *frame;
 | 
			
		||||
    AVPacket pkt;
 | 
			
		||||
    int i, j, k, ret, got_output;
 | 
			
		||||
    int buffer_size;
 | 
			
		||||
    FILE *f;
 | 
			
		||||
    uint16_t *samples;
 | 
			
		||||
    float t, tincr;
 | 
			
		||||
 | 
			
		||||
    printf("Encode audio file %s\n", filename);
 | 
			
		||||
 | 
			
		||||
    /* find the MP2 encoder */
 | 
			
		||||
    codec = avcodec_find_encoder(AV_CODEC_ID_MP2);
 | 
			
		||||
    if (!codec) {
 | 
			
		||||
        fprintf(stderr, "Codec not found\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    c = avcodec_alloc_context3(codec);
 | 
			
		||||
    if (!c) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate audio codec context\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* put sample parameters */
 | 
			
		||||
    c->bit_rate = 64000;
 | 
			
		||||
 | 
			
		||||
    /* check that the encoder supports s16 pcm input */
 | 
			
		||||
    c->sample_fmt = AV_SAMPLE_FMT_S16;
 | 
			
		||||
    if (!check_sample_fmt(codec, c->sample_fmt)) {
 | 
			
		||||
        fprintf(stderr, "Encoder does not support sample format %s",
 | 
			
		||||
                av_get_sample_fmt_name(c->sample_fmt));
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* select other audio parameters supported by the encoder */
 | 
			
		||||
    c->sample_rate    = select_sample_rate(codec);
 | 
			
		||||
    c->channel_layout = select_channel_layout(codec);
 | 
			
		||||
    c->channels       = av_get_channel_layout_nb_channels(c->channel_layout);
 | 
			
		||||
 | 
			
		||||
    /* open it */
 | 
			
		||||
    if (avcodec_open2(c, codec, NULL) < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not open codec\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    f = fopen(filename, "wb");
 | 
			
		||||
    if (!f) {
 | 
			
		||||
        fprintf(stderr, "Could not open %s\n", filename);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* frame containing input raw audio */
 | 
			
		||||
    frame = avcodec_alloc_frame();
 | 
			
		||||
    if (!frame) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate audio frame\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    frame->nb_samples     = c->frame_size;
 | 
			
		||||
    frame->format         = c->sample_fmt;
 | 
			
		||||
    frame->channel_layout = c->channel_layout;
 | 
			
		||||
 | 
			
		||||
    /* the codec gives us the frame size, in samples,
 | 
			
		||||
     * we calculate the size of the samples buffer in bytes */
 | 
			
		||||
    buffer_size = av_samples_get_buffer_size(NULL, c->channels, c->frame_size,
 | 
			
		||||
                                             c->sample_fmt, 0);
 | 
			
		||||
    samples = av_malloc(buffer_size);
 | 
			
		||||
    if (!samples) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate %d bytes for samples buffer\n",
 | 
			
		||||
                buffer_size);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
    /* setup the data pointers in the AVFrame */
 | 
			
		||||
    ret = avcodec_fill_audio_frame(frame, c->channels, c->sample_fmt,
 | 
			
		||||
                                   (const uint8_t*)samples, buffer_size, 0);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not setup audio frame\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* encode a single tone sound */
 | 
			
		||||
    t = 0;
 | 
			
		||||
    tincr = 2 * M_PI * 440.0 / c->sample_rate;
 | 
			
		||||
    for(i=0;i<200;i++) {
 | 
			
		||||
        av_init_packet(&pkt);
 | 
			
		||||
        pkt.data = NULL; // packet data will be allocated by the encoder
 | 
			
		||||
        pkt.size = 0;
 | 
			
		||||
 | 
			
		||||
        for (j = 0; j < c->frame_size; j++) {
 | 
			
		||||
            samples[2*j] = (int)(sin(t) * 10000);
 | 
			
		||||
 | 
			
		||||
            for (k = 1; k < c->channels; k++)
 | 
			
		||||
                samples[2*j + k] = samples[2*j];
 | 
			
		||||
            t += tincr;
 | 
			
		||||
        }
 | 
			
		||||
        /* encode the samples */
 | 
			
		||||
        ret = avcodec_encode_audio2(c, &pkt, frame, &got_output);
 | 
			
		||||
        if (ret < 0) {
 | 
			
		||||
            fprintf(stderr, "Error encoding audio frame\n");
 | 
			
		||||
            exit(1);
 | 
			
		||||
        }
 | 
			
		||||
        if (got_output) {
 | 
			
		||||
            fwrite(pkt.data, 1, pkt.size, f);
 | 
			
		||||
            av_free_packet(&pkt);
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* get the delayed frames */
 | 
			
		||||
    for (got_output = 1; got_output; i++) {
 | 
			
		||||
        ret = avcodec_encode_audio2(c, &pkt, NULL, &got_output);
 | 
			
		||||
        if (ret < 0) {
 | 
			
		||||
            fprintf(stderr, "Error encoding frame\n");
 | 
			
		||||
            exit(1);
 | 
			
		||||
        }
 | 
			
		||||
 | 
			
		||||
        if (got_output) {
 | 
			
		||||
            fwrite(pkt.data, 1, pkt.size, f);
 | 
			
		||||
            av_free_packet(&pkt);
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
    fclose(f);
 | 
			
		||||
 | 
			
		||||
    av_freep(&samples);
 | 
			
		||||
    avcodec_free_frame(&frame);
 | 
			
		||||
    avcodec_close(c);
 | 
			
		||||
    av_free(c);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
/*
 | 
			
		||||
 * Audio decoding.
 | 
			
		||||
 */
 | 
			
		||||
static void audio_decode_example(const char *outfilename, const char *filename)
 | 
			
		||||
{
 | 
			
		||||
    AVCodec *codec;
 | 
			
		||||
    AVCodecContext *c= NULL;
 | 
			
		||||
    int len;
 | 
			
		||||
    FILE *f, *outfile;
 | 
			
		||||
    uint8_t inbuf[AUDIO_INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
 | 
			
		||||
    AVPacket avpkt;
 | 
			
		||||
    AVFrame *decoded_frame = NULL;
 | 
			
		||||
 | 
			
		||||
    av_init_packet(&avpkt);
 | 
			
		||||
 | 
			
		||||
    printf("Decode audio file %s to %s\n", filename, outfilename);
 | 
			
		||||
 | 
			
		||||
    /* find the mpeg audio decoder */
 | 
			
		||||
    codec = avcodec_find_decoder(AV_CODEC_ID_MP2);
 | 
			
		||||
    if (!codec) {
 | 
			
		||||
        fprintf(stderr, "Codec not found\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    c = avcodec_alloc_context3(codec);
 | 
			
		||||
    if (!c) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate audio codec context\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* open it */
 | 
			
		||||
    if (avcodec_open2(c, codec, NULL) < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not open codec\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    f = fopen(filename, "rb");
 | 
			
		||||
    if (!f) {
 | 
			
		||||
        fprintf(stderr, "Could not open %s\n", filename);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
    outfile = fopen(outfilename, "wb");
 | 
			
		||||
    if (!outfile) {
 | 
			
		||||
        av_free(c);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* decode until eof */
 | 
			
		||||
    avpkt.data = inbuf;
 | 
			
		||||
    avpkt.size = fread(inbuf, 1, AUDIO_INBUF_SIZE, f);
 | 
			
		||||
 | 
			
		||||
    while (avpkt.size > 0) {
 | 
			
		||||
        int got_frame = 0;
 | 
			
		||||
 | 
			
		||||
        if (!decoded_frame) {
 | 
			
		||||
            if (!(decoded_frame = avcodec_alloc_frame())) {
 | 
			
		||||
                fprintf(stderr, "Could not allocate audio frame\n");
 | 
			
		||||
                exit(1);
 | 
			
		||||
            }
 | 
			
		||||
        } else
 | 
			
		||||
            avcodec_get_frame_defaults(decoded_frame);
 | 
			
		||||
 | 
			
		||||
        len = avcodec_decode_audio4(c, decoded_frame, &got_frame, &avpkt);
 | 
			
		||||
        if (len < 0) {
 | 
			
		||||
            fprintf(stderr, "Error while decoding\n");
 | 
			
		||||
            exit(1);
 | 
			
		||||
        }
 | 
			
		||||
        if (got_frame) {
 | 
			
		||||
            /* if a frame has been decoded, output it */
 | 
			
		||||
            int data_size = av_samples_get_buffer_size(NULL, c->channels,
 | 
			
		||||
                                                       decoded_frame->nb_samples,
 | 
			
		||||
                                                       c->sample_fmt, 1);
 | 
			
		||||
            fwrite(decoded_frame->data[0], 1, data_size, outfile);
 | 
			
		||||
        }
 | 
			
		||||
        avpkt.size -= len;
 | 
			
		||||
        avpkt.data += len;
 | 
			
		||||
        avpkt.dts =
 | 
			
		||||
        avpkt.pts = AV_NOPTS_VALUE;
 | 
			
		||||
        if (avpkt.size < AUDIO_REFILL_THRESH) {
 | 
			
		||||
            /* Refill the input buffer, to avoid trying to decode
 | 
			
		||||
             * incomplete frames. Instead of this, one could also use
 | 
			
		||||
             * a parser, or use a proper container format through
 | 
			
		||||
             * libavformat. */
 | 
			
		||||
            memmove(inbuf, avpkt.data, avpkt.size);
 | 
			
		||||
            avpkt.data = inbuf;
 | 
			
		||||
            len = fread(avpkt.data + avpkt.size, 1,
 | 
			
		||||
                        AUDIO_INBUF_SIZE - avpkt.size, f);
 | 
			
		||||
            if (len > 0)
 | 
			
		||||
                avpkt.size += len;
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    fclose(outfile);
 | 
			
		||||
    fclose(f);
 | 
			
		||||
 | 
			
		||||
    avcodec_close(c);
 | 
			
		||||
    av_free(c);
 | 
			
		||||
    avcodec_free_frame(&decoded_frame);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
/*
 | 
			
		||||
 * Video encoding example
 | 
			
		||||
 */
 | 
			
		||||
static void video_encode_example(const char *filename, int codec_id)
 | 
			
		||||
{
 | 
			
		||||
    AVCodec *codec;
 | 
			
		||||
    AVCodecContext *c= NULL;
 | 
			
		||||
    int i, ret, x, y, got_output;
 | 
			
		||||
    FILE *f;
 | 
			
		||||
    AVFrame *frame;
 | 
			
		||||
    AVPacket pkt;
 | 
			
		||||
    uint8_t endcode[] = { 0, 0, 1, 0xb7 };
 | 
			
		||||
 | 
			
		||||
    printf("Encode video file %s\n", filename);
 | 
			
		||||
 | 
			
		||||
    /* find the mpeg1 video encoder */
 | 
			
		||||
    codec = avcodec_find_encoder(codec_id);
 | 
			
		||||
    if (!codec) {
 | 
			
		||||
        fprintf(stderr, "Codec not found\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    c = avcodec_alloc_context3(codec);
 | 
			
		||||
    if (!c) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate video codec context\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* put sample parameters */
 | 
			
		||||
    c->bit_rate = 400000;
 | 
			
		||||
    /* resolution must be a multiple of two */
 | 
			
		||||
    c->width = 352;
 | 
			
		||||
    c->height = 288;
 | 
			
		||||
    /* frames per second */
 | 
			
		||||
    c->time_base= (AVRational){1,25};
 | 
			
		||||
    c->gop_size = 10; /* emit one intra frame every ten frames */
 | 
			
		||||
    c->max_b_frames=1;
 | 
			
		||||
    c->pix_fmt = AV_PIX_FMT_YUV420P;
 | 
			
		||||
 | 
			
		||||
    if(codec_id == AV_CODEC_ID_H264)
 | 
			
		||||
        av_opt_set(c->priv_data, "preset", "slow", 0);
 | 
			
		||||
 | 
			
		||||
    /* open it */
 | 
			
		||||
    if (avcodec_open2(c, codec, NULL) < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not open codec\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    f = fopen(filename, "wb");
 | 
			
		||||
    if (!f) {
 | 
			
		||||
        fprintf(stderr, "Could not open %s\n", filename);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    frame = avcodec_alloc_frame();
 | 
			
		||||
    if (!frame) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate video frame\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
    frame->format = c->pix_fmt;
 | 
			
		||||
    frame->width  = c->width;
 | 
			
		||||
    frame->height = c->height;
 | 
			
		||||
 | 
			
		||||
    /* the image can be allocated by any means and av_image_alloc() is
 | 
			
		||||
     * just the most convenient way if av_malloc() is to be used */
 | 
			
		||||
    ret = av_image_alloc(frame->data, frame->linesize, c->width, c->height,
 | 
			
		||||
                         c->pix_fmt, 32);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate raw picture buffer\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* encode 1 second of video */
 | 
			
		||||
    for(i=0;i<25;i++) {
 | 
			
		||||
        av_init_packet(&pkt);
 | 
			
		||||
        pkt.data = NULL;    // packet data will be allocated by the encoder
 | 
			
		||||
        pkt.size = 0;
 | 
			
		||||
 | 
			
		||||
        fflush(stdout);
 | 
			
		||||
        /* prepare a dummy image */
 | 
			
		||||
        /* Y */
 | 
			
		||||
        for(y=0;y<c->height;y++) {
 | 
			
		||||
            for(x=0;x<c->width;x++) {
 | 
			
		||||
                frame->data[0][y * frame->linesize[0] + x] = x + y + i * 3;
 | 
			
		||||
            }
 | 
			
		||||
        }
 | 
			
		||||
 | 
			
		||||
        /* Cb and Cr */
 | 
			
		||||
        for(y=0;y<c->height/2;y++) {
 | 
			
		||||
            for(x=0;x<c->width/2;x++) {
 | 
			
		||||
                frame->data[1][y * frame->linesize[1] + x] = 128 + y + i * 2;
 | 
			
		||||
                frame->data[2][y * frame->linesize[2] + x] = 64 + x + i * 5;
 | 
			
		||||
            }
 | 
			
		||||
        }
 | 
			
		||||
 | 
			
		||||
        frame->pts = i;
 | 
			
		||||
 | 
			
		||||
        /* encode the image */
 | 
			
		||||
        ret = avcodec_encode_video2(c, &pkt, frame, &got_output);
 | 
			
		||||
        if (ret < 0) {
 | 
			
		||||
            fprintf(stderr, "Error encoding frame\n");
 | 
			
		||||
            exit(1);
 | 
			
		||||
        }
 | 
			
		||||
 | 
			
		||||
        if (got_output) {
 | 
			
		||||
            printf("Write frame %3d (size=%5d)\n", i, pkt.size);
 | 
			
		||||
            fwrite(pkt.data, 1, pkt.size, f);
 | 
			
		||||
            av_free_packet(&pkt);
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* get the delayed frames */
 | 
			
		||||
    for (got_output = 1; got_output; i++) {
 | 
			
		||||
        fflush(stdout);
 | 
			
		||||
 | 
			
		||||
        ret = avcodec_encode_video2(c, &pkt, NULL, &got_output);
 | 
			
		||||
        if (ret < 0) {
 | 
			
		||||
            fprintf(stderr, "Error encoding frame\n");
 | 
			
		||||
            exit(1);
 | 
			
		||||
        }
 | 
			
		||||
 | 
			
		||||
        if (got_output) {
 | 
			
		||||
            printf("Write frame %3d (size=%5d)\n", i, pkt.size);
 | 
			
		||||
            fwrite(pkt.data, 1, pkt.size, f);
 | 
			
		||||
            av_free_packet(&pkt);
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* add sequence end code to have a real mpeg file */
 | 
			
		||||
    fwrite(endcode, 1, sizeof(endcode), f);
 | 
			
		||||
    fclose(f);
 | 
			
		||||
 | 
			
		||||
    avcodec_close(c);
 | 
			
		||||
    av_free(c);
 | 
			
		||||
    av_freep(&frame->data[0]);
 | 
			
		||||
    avcodec_free_frame(&frame);
 | 
			
		||||
    printf("\n");
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
/*
 | 
			
		||||
 * Video decoding example
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
static void pgm_save(unsigned char *buf, int wrap, int xsize, int ysize,
 | 
			
		||||
                     char *filename)
 | 
			
		||||
{
 | 
			
		||||
    FILE *f;
 | 
			
		||||
    int i;
 | 
			
		||||
 | 
			
		||||
    f=fopen(filename,"w");
 | 
			
		||||
    fprintf(f,"P5\n%d %d\n%d\n",xsize,ysize,255);
 | 
			
		||||
    for(i=0;i<ysize;i++)
 | 
			
		||||
        fwrite(buf + i * wrap,1,xsize,f);
 | 
			
		||||
    fclose(f);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int decode_write_frame(const char *outfilename, AVCodecContext *avctx,
 | 
			
		||||
                              AVFrame *frame, int *frame_count, AVPacket *pkt, int last)
 | 
			
		||||
{
 | 
			
		||||
    int len, got_frame;
 | 
			
		||||
    char buf[1024];
 | 
			
		||||
 | 
			
		||||
    len = avcodec_decode_video2(avctx, frame, &got_frame, pkt);
 | 
			
		||||
    if (len < 0) {
 | 
			
		||||
        fprintf(stderr, "Error while decoding frame %d\n", *frame_count);
 | 
			
		||||
        return len;
 | 
			
		||||
    }
 | 
			
		||||
    if (got_frame) {
 | 
			
		||||
        printf("Saving %sframe %3d\n", last ? "last " : "", *frame_count);
 | 
			
		||||
        fflush(stdout);
 | 
			
		||||
 | 
			
		||||
        /* the picture is allocated by the decoder, no need to free it */
 | 
			
		||||
        snprintf(buf, sizeof(buf), outfilename, *frame_count);
 | 
			
		||||
        pgm_save(frame->data[0], frame->linesize[0],
 | 
			
		||||
                 avctx->width, avctx->height, buf);
 | 
			
		||||
        (*frame_count)++;
 | 
			
		||||
    }
 | 
			
		||||
    if (pkt->data) {
 | 
			
		||||
        pkt->size -= len;
 | 
			
		||||
        pkt->data += len;
 | 
			
		||||
    }
 | 
			
		||||
    return 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static void video_decode_example(const char *outfilename, const char *filename)
 | 
			
		||||
{
 | 
			
		||||
    AVCodec *codec;
 | 
			
		||||
    AVCodecContext *c= NULL;
 | 
			
		||||
    int frame_count;
 | 
			
		||||
    FILE *f;
 | 
			
		||||
    AVFrame *frame;
 | 
			
		||||
    uint8_t inbuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
 | 
			
		||||
    AVPacket avpkt;
 | 
			
		||||
 | 
			
		||||
    av_init_packet(&avpkt);
 | 
			
		||||
 | 
			
		||||
    /* set end of buffer to 0 (this ensures that no overreading happens for damaged mpeg streams) */
 | 
			
		||||
    memset(inbuf + INBUF_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
 | 
			
		||||
 | 
			
		||||
    printf("Decode video file %s to %s\n", filename, outfilename);
 | 
			
		||||
 | 
			
		||||
    /* find the mpeg1 video decoder */
 | 
			
		||||
    codec = avcodec_find_decoder(AV_CODEC_ID_MPEG1VIDEO);
 | 
			
		||||
    if (!codec) {
 | 
			
		||||
        fprintf(stderr, "Codec not found\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    c = avcodec_alloc_context3(codec);
 | 
			
		||||
    if (!c) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate video codec context\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    if(codec->capabilities&CODEC_CAP_TRUNCATED)
 | 
			
		||||
        c->flags|= CODEC_FLAG_TRUNCATED; /* we do not send complete frames */
 | 
			
		||||
 | 
			
		||||
    /* For some codecs, such as msmpeg4 and mpeg4, width and height
 | 
			
		||||
       MUST be initialized there because this information is not
 | 
			
		||||
       available in the bitstream. */
 | 
			
		||||
 | 
			
		||||
    /* open it */
 | 
			
		||||
    if (avcodec_open2(c, codec, NULL) < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not open codec\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    f = fopen(filename, "rb");
 | 
			
		||||
    if (!f) {
 | 
			
		||||
        fprintf(stderr, "Could not open %s\n", filename);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    frame = avcodec_alloc_frame();
 | 
			
		||||
    if (!frame) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate video frame\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    frame_count = 0;
 | 
			
		||||
    for(;;) {
 | 
			
		||||
        avpkt.size = fread(inbuf, 1, INBUF_SIZE, f);
 | 
			
		||||
        if (avpkt.size == 0)
 | 
			
		||||
            break;
 | 
			
		||||
 | 
			
		||||
        /* NOTE1: some codecs are stream based (mpegvideo, mpegaudio)
 | 
			
		||||
           and this is the only method to use them because you cannot
 | 
			
		||||
           know the compressed data size before analysing it.
 | 
			
		||||
 | 
			
		||||
           BUT some other codecs (msmpeg4, mpeg4) are inherently frame
 | 
			
		||||
           based, so you must call them with all the data for one
 | 
			
		||||
           frame exactly. You must also initialize 'width' and
 | 
			
		||||
           'height' before initializing them. */
 | 
			
		||||
 | 
			
		||||
        /* NOTE2: some codecs allow the raw parameters (frame size,
 | 
			
		||||
           sample rate) to be changed at any frame. We handle this, so
 | 
			
		||||
           you should also take care of it */
 | 
			
		||||
 | 
			
		||||
        /* here, we use a stream based decoder (mpeg1video), so we
 | 
			
		||||
           feed decoder and see if it could decode a frame */
 | 
			
		||||
        avpkt.data = inbuf;
 | 
			
		||||
        while (avpkt.size > 0)
 | 
			
		||||
            if (decode_write_frame(outfilename, c, frame, &frame_count, &avpkt, 0) < 0)
 | 
			
		||||
                exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* some codecs, such as MPEG, transmit the I and P frame with a
 | 
			
		||||
       latency of one frame. You must do the following to have a
 | 
			
		||||
       chance to get the last frame of the video */
 | 
			
		||||
    avpkt.data = NULL;
 | 
			
		||||
    avpkt.size = 0;
 | 
			
		||||
    decode_write_frame(outfilename, c, frame, &frame_count, &avpkt, 1);
 | 
			
		||||
 | 
			
		||||
    fclose(f);
 | 
			
		||||
 | 
			
		||||
    avcodec_close(c);
 | 
			
		||||
    av_free(c);
 | 
			
		||||
    avcodec_free_frame(&frame);
 | 
			
		||||
    printf("\n");
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
int main(int argc, char **argv)
 | 
			
		||||
{
 | 
			
		||||
    const char *output_type;
 | 
			
		||||
 | 
			
		||||
    /* register all the codecs */
 | 
			
		||||
    avcodec_register_all();
 | 
			
		||||
 | 
			
		||||
    if (argc < 2) {
 | 
			
		||||
        printf("usage: %s output_type\n"
 | 
			
		||||
               "API example program to decode/encode a media stream with libavcodec.\n"
 | 
			
		||||
               "This program generates a synthetic stream and encodes it to a file\n"
 | 
			
		||||
               "named test.h264, test.mp2 or test.mpg depending on output_type.\n"
 | 
			
		||||
               "The encoded stream is then decoded and written to a raw data output.\n"
 | 
			
		||||
               "output_type must be choosen between 'h264', 'mp2', 'mpg'.\n",
 | 
			
		||||
               argv[0]);
 | 
			
		||||
        return 1;
 | 
			
		||||
    }
 | 
			
		||||
    output_type = argv[1];
 | 
			
		||||
 | 
			
		||||
    if (!strcmp(output_type, "h264")) {
 | 
			
		||||
        video_encode_example("test.h264", AV_CODEC_ID_H264);
 | 
			
		||||
    } else if (!strcmp(output_type, "mp2")) {
 | 
			
		||||
        audio_encode_example("test.mp2");
 | 
			
		||||
        audio_decode_example("test.sw", "test.mp2");
 | 
			
		||||
    } else if (!strcmp(output_type, "mpg")) {
 | 
			
		||||
        video_encode_example("test.mpg", AV_CODEC_ID_MPEG1VIDEO);
 | 
			
		||||
        video_decode_example("test%02d.pgm", "test.mpg");
 | 
			
		||||
    } else {
 | 
			
		||||
        fprintf(stderr, "Invalid output type '%s', choose between 'h264', 'mp2', or 'mpg'\n",
 | 
			
		||||
                output_type);
 | 
			
		||||
        return 1;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    return 0;
 | 
			
		||||
}
 | 
			
		||||
@@ -1,340 +0,0 @@
 | 
			
		||||
/*
 | 
			
		||||
 * Copyright (c) 2012 Stefano Sabatini
 | 
			
		||||
 *
 | 
			
		||||
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 | 
			
		||||
 * of this software and associated documentation files (the "Software"), to deal
 | 
			
		||||
 * in the Software without restriction, including without limitation the rights
 | 
			
		||||
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 | 
			
		||||
 * copies of the Software, and to permit persons to whom the Software is
 | 
			
		||||
 * furnished to do so, subject to the following conditions:
 | 
			
		||||
 *
 | 
			
		||||
 * The above copyright notice and this permission notice shall be included in
 | 
			
		||||
 * all copies or substantial portions of the Software.
 | 
			
		||||
 *
 | 
			
		||||
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 | 
			
		||||
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 | 
			
		||||
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 | 
			
		||||
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 | 
			
		||||
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 | 
			
		||||
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 | 
			
		||||
 * THE SOFTWARE.
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * @file
 | 
			
		||||
 * libavformat demuxing API use example.
 | 
			
		||||
 *
 | 
			
		||||
 * Show how to use the libavformat and libavcodec API to demux and
 | 
			
		||||
 * decode audio and video data.
 | 
			
		||||
 * @example doc/examples/demuxing.c
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
#include <libavutil/imgutils.h>
 | 
			
		||||
#include <libavutil/samplefmt.h>
 | 
			
		||||
#include <libavutil/timestamp.h>
 | 
			
		||||
#include <libavformat/avformat.h>
 | 
			
		||||
 | 
			
		||||
static AVFormatContext *fmt_ctx = NULL;
 | 
			
		||||
static AVCodecContext *video_dec_ctx = NULL, *audio_dec_ctx;
 | 
			
		||||
static AVStream *video_stream = NULL, *audio_stream = NULL;
 | 
			
		||||
static const char *src_filename = NULL;
 | 
			
		||||
static const char *video_dst_filename = NULL;
 | 
			
		||||
static const char *audio_dst_filename = NULL;
 | 
			
		||||
static FILE *video_dst_file = NULL;
 | 
			
		||||
static FILE *audio_dst_file = NULL;
 | 
			
		||||
 | 
			
		||||
static uint8_t *video_dst_data[4] = {NULL};
 | 
			
		||||
static int      video_dst_linesize[4];
 | 
			
		||||
static int video_dst_bufsize;
 | 
			
		||||
 | 
			
		||||
static uint8_t **audio_dst_data = NULL;
 | 
			
		||||
static int       audio_dst_linesize;
 | 
			
		||||
static int audio_dst_bufsize;
 | 
			
		||||
 | 
			
		||||
static int video_stream_idx = -1, audio_stream_idx = -1;
 | 
			
		||||
static AVFrame *frame = NULL;
 | 
			
		||||
static AVPacket pkt;
 | 
			
		||||
static int video_frame_count = 0;
 | 
			
		||||
static int audio_frame_count = 0;
 | 
			
		||||
 | 
			
		||||
static int decode_packet(int *got_frame, int cached)
 | 
			
		||||
{
 | 
			
		||||
    int ret = 0;
 | 
			
		||||
 | 
			
		||||
    if (pkt.stream_index == video_stream_idx) {
 | 
			
		||||
        /* decode video frame */
 | 
			
		||||
        ret = avcodec_decode_video2(video_dec_ctx, frame, got_frame, &pkt);
 | 
			
		||||
        if (ret < 0) {
 | 
			
		||||
            fprintf(stderr, "Error decoding video frame\n");
 | 
			
		||||
            return ret;
 | 
			
		||||
        }
 | 
			
		||||
 | 
			
		||||
        if (*got_frame) {
 | 
			
		||||
            printf("video_frame%s n:%d coded_n:%d pts:%s\n",
 | 
			
		||||
                   cached ? "(cached)" : "",
 | 
			
		||||
                   video_frame_count++, frame->coded_picture_number,
 | 
			
		||||
                   av_ts2timestr(frame->pts, &video_dec_ctx->time_base));
 | 
			
		||||
 | 
			
		||||
            /* copy decoded frame to destination buffer:
 | 
			
		||||
             * this is required since rawvideo expects non aligned data */
 | 
			
		||||
            av_image_copy(video_dst_data, video_dst_linesize,
 | 
			
		||||
                          (const uint8_t **)(frame->data), frame->linesize,
 | 
			
		||||
                          video_dec_ctx->pix_fmt, video_dec_ctx->width, video_dec_ctx->height);
 | 
			
		||||
 | 
			
		||||
            /* write to rawvideo file */
 | 
			
		||||
            fwrite(video_dst_data[0], 1, video_dst_bufsize, video_dst_file);
 | 
			
		||||
        }
 | 
			
		||||
    } else if (pkt.stream_index == audio_stream_idx) {
 | 
			
		||||
        /* decode audio frame */
 | 
			
		||||
        ret = avcodec_decode_audio4(audio_dec_ctx, frame, got_frame, &pkt);
 | 
			
		||||
        if (ret < 0) {
 | 
			
		||||
            fprintf(stderr, "Error decoding audio frame\n");
 | 
			
		||||
            return ret;
 | 
			
		||||
        }
 | 
			
		||||
 | 
			
		||||
        if (*got_frame) {
 | 
			
		||||
            printf("audio_frame%s n:%d nb_samples:%d pts:%s\n",
 | 
			
		||||
                   cached ? "(cached)" : "",
 | 
			
		||||
                   audio_frame_count++, frame->nb_samples,
 | 
			
		||||
                   av_ts2timestr(frame->pts, &audio_dec_ctx->time_base));
 | 
			
		||||
 | 
			
		||||
            ret = av_samples_alloc(audio_dst_data, &audio_dst_linesize, frame->channels,
 | 
			
		||||
                                   frame->nb_samples, frame->format, 1);
 | 
			
		||||
            if (ret < 0) {
 | 
			
		||||
                fprintf(stderr, "Could not allocate audio buffer\n");
 | 
			
		||||
                return AVERROR(ENOMEM);
 | 
			
		||||
            }
 | 
			
		||||
 | 
			
		||||
            /* TODO: extend return code of the av_samples_* functions so that this call is not needed */
 | 
			
		||||
            audio_dst_bufsize =
 | 
			
		||||
                av_samples_get_buffer_size(NULL, frame->channels,
 | 
			
		||||
                                           frame->nb_samples, frame->format, 1);
 | 
			
		||||
 | 
			
		||||
            /* copy audio data to destination buffer:
 | 
			
		||||
             * this is required since rawaudio expects non aligned data */
 | 
			
		||||
            av_samples_copy(audio_dst_data, frame->data, 0, 0,
 | 
			
		||||
                            frame->nb_samples, frame->channels, frame->format);
 | 
			
		||||
 | 
			
		||||
            /* write to rawaudio file */
 | 
			
		||||
            fwrite(audio_dst_data[0], 1, audio_dst_bufsize, audio_dst_file);
 | 
			
		||||
            av_freep(&audio_dst_data[0]);
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    return ret;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int open_codec_context(int *stream_idx,
 | 
			
		||||
                              AVFormatContext *fmt_ctx, enum AVMediaType type)
 | 
			
		||||
{
 | 
			
		||||
    int ret;
 | 
			
		||||
    AVStream *st;
 | 
			
		||||
    AVCodecContext *dec_ctx = NULL;
 | 
			
		||||
    AVCodec *dec = NULL;
 | 
			
		||||
 | 
			
		||||
    ret = av_find_best_stream(fmt_ctx, type, -1, -1, NULL, 0);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not find %s stream in input file '%s'\n",
 | 
			
		||||
                av_get_media_type_string(type), src_filename);
 | 
			
		||||
        return ret;
 | 
			
		||||
    } else {
 | 
			
		||||
        *stream_idx = ret;
 | 
			
		||||
        st = fmt_ctx->streams[*stream_idx];
 | 
			
		||||
 | 
			
		||||
        /* find decoder for the stream */
 | 
			
		||||
        dec_ctx = st->codec;
 | 
			
		||||
        dec = avcodec_find_decoder(dec_ctx->codec_id);
 | 
			
		||||
        if (!dec) {
 | 
			
		||||
            fprintf(stderr, "Failed to find %s codec\n",
 | 
			
		||||
                    av_get_media_type_string(type));
 | 
			
		||||
            return ret;
 | 
			
		||||
        }
 | 
			
		||||
 | 
			
		||||
        if ((ret = avcodec_open2(dec_ctx, dec, NULL)) < 0) {
 | 
			
		||||
            fprintf(stderr, "Failed to open %s codec\n",
 | 
			
		||||
                    av_get_media_type_string(type));
 | 
			
		||||
            return ret;
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    return 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int get_format_from_sample_fmt(const char **fmt,
 | 
			
		||||
                                      enum AVSampleFormat sample_fmt)
 | 
			
		||||
{
 | 
			
		||||
    int i;
 | 
			
		||||
    struct sample_fmt_entry {
 | 
			
		||||
        enum AVSampleFormat sample_fmt; const char *fmt_be, *fmt_le;
 | 
			
		||||
    } sample_fmt_entries[] = {
 | 
			
		||||
        { AV_SAMPLE_FMT_U8,  "u8",    "u8"    },
 | 
			
		||||
        { AV_SAMPLE_FMT_S16, "s16be", "s16le" },
 | 
			
		||||
        { AV_SAMPLE_FMT_S32, "s32be", "s32le" },
 | 
			
		||||
        { AV_SAMPLE_FMT_FLT, "f32be", "f32le" },
 | 
			
		||||
        { AV_SAMPLE_FMT_DBL, "f64be", "f64le" },
 | 
			
		||||
    };
 | 
			
		||||
    *fmt = NULL;
 | 
			
		||||
 | 
			
		||||
    for (i = 0; i < FF_ARRAY_ELEMS(sample_fmt_entries); i++) {
 | 
			
		||||
        struct sample_fmt_entry *entry = &sample_fmt_entries[i];
 | 
			
		||||
        if (sample_fmt == entry->sample_fmt) {
 | 
			
		||||
            *fmt = AV_NE(entry->fmt_be, entry->fmt_le);
 | 
			
		||||
            return 0;
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    fprintf(stderr,
 | 
			
		||||
            "sample format %s is not supported as output format\n",
 | 
			
		||||
            av_get_sample_fmt_name(sample_fmt));
 | 
			
		||||
    return -1;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
int main (int argc, char **argv)
 | 
			
		||||
{
 | 
			
		||||
    int ret = 0, got_frame;
 | 
			
		||||
 | 
			
		||||
    if (argc != 4) {
 | 
			
		||||
        fprintf(stderr, "usage: %s input_file video_output_file audio_output_file\n"
 | 
			
		||||
                "API example program to show how to read frames from an input file.\n"
 | 
			
		||||
                "This program reads frames from a file, decodes them, and writes decoded\n"
 | 
			
		||||
                "video frames to a rawvideo file named video_output_file, and decoded\n"
 | 
			
		||||
                "audio frames to a rawaudio file named audio_output_file.\n"
 | 
			
		||||
                "\n", argv[0]);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
    src_filename = argv[1];
 | 
			
		||||
    video_dst_filename = argv[2];
 | 
			
		||||
    audio_dst_filename = argv[3];
 | 
			
		||||
 | 
			
		||||
    /* register all formats and codecs */
 | 
			
		||||
    av_register_all();
 | 
			
		||||
 | 
			
		||||
    /* open input file, and allocate format context */
 | 
			
		||||
    if (avformat_open_input(&fmt_ctx, src_filename, NULL, NULL) < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not open source file %s\n", src_filename);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* retrieve stream information */
 | 
			
		||||
    if (avformat_find_stream_info(fmt_ctx, NULL) < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not find stream information\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    if (open_codec_context(&video_stream_idx, fmt_ctx, AVMEDIA_TYPE_VIDEO) >= 0) {
 | 
			
		||||
        video_stream = fmt_ctx->streams[video_stream_idx];
 | 
			
		||||
        video_dec_ctx = video_stream->codec;
 | 
			
		||||
 | 
			
		||||
        video_dst_file = fopen(video_dst_filename, "wb");
 | 
			
		||||
        if (!video_dst_file) {
 | 
			
		||||
            fprintf(stderr, "Could not open destination file %s\n", video_dst_filename);
 | 
			
		||||
            ret = 1;
 | 
			
		||||
            goto end;
 | 
			
		||||
        }
 | 
			
		||||
 | 
			
		||||
        /* allocate image where the decoded image will be put */
 | 
			
		||||
        ret = av_image_alloc(video_dst_data, video_dst_linesize,
 | 
			
		||||
                             video_dec_ctx->width, video_dec_ctx->height,
 | 
			
		||||
                             video_dec_ctx->pix_fmt, 1);
 | 
			
		||||
        if (ret < 0) {
 | 
			
		||||
            fprintf(stderr, "Could not allocate raw video buffer\n");
 | 
			
		||||
            goto end;
 | 
			
		||||
        }
 | 
			
		||||
        video_dst_bufsize = ret;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    if (open_codec_context(&audio_stream_idx, fmt_ctx, AVMEDIA_TYPE_AUDIO) >= 0) {
 | 
			
		||||
        int nb_planes;
 | 
			
		||||
 | 
			
		||||
        audio_stream = fmt_ctx->streams[audio_stream_idx];
 | 
			
		||||
        audio_dec_ctx = audio_stream->codec;
 | 
			
		||||
        audio_dst_file = fopen(audio_dst_filename, "wb");
 | 
			
		||||
        if (!audio_dst_file) {
 | 
			
		||||
            fprintf(stderr, "Could not open destination file %s\n", video_dst_filename);
 | 
			
		||||
            ret = 1;
 | 
			
		||||
            goto end;
 | 
			
		||||
        }
 | 
			
		||||
 | 
			
		||||
        nb_planes = av_sample_fmt_is_planar(audio_dec_ctx->sample_fmt) ?
 | 
			
		||||
            audio_dec_ctx->channels : 1;
 | 
			
		||||
        audio_dst_data = av_mallocz(sizeof(uint8_t *) * nb_planes);
 | 
			
		||||
        if (!audio_dst_data) {
 | 
			
		||||
            fprintf(stderr, "Could not allocate audio data buffers\n");
 | 
			
		||||
            ret = AVERROR(ENOMEM);
 | 
			
		||||
            goto end;
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* dump input information to stderr */
 | 
			
		||||
    av_dump_format(fmt_ctx, 0, src_filename, 0);
 | 
			
		||||
 | 
			
		||||
    if (!audio_stream && !video_stream) {
 | 
			
		||||
        fprintf(stderr, "Could not find audio or video stream in the input, aborting\n");
 | 
			
		||||
        ret = 1;
 | 
			
		||||
        goto end;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    frame = avcodec_alloc_frame();
 | 
			
		||||
    if (!frame) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate frame\n");
 | 
			
		||||
        ret = AVERROR(ENOMEM);
 | 
			
		||||
        goto end;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* initialize packet, set data to NULL, let the demuxer fill it */
 | 
			
		||||
    av_init_packet(&pkt);
 | 
			
		||||
    pkt.data = NULL;
 | 
			
		||||
    pkt.size = 0;
 | 
			
		||||
 | 
			
		||||
    if (video_stream)
 | 
			
		||||
        printf("Demuxing video from file '%s' into '%s'\n", src_filename, video_dst_filename);
 | 
			
		||||
    if (audio_stream)
 | 
			
		||||
        printf("Demuxing audio from file '%s' into '%s'\n", src_filename, audio_dst_filename);
 | 
			
		||||
 | 
			
		||||
    /* read frames from the file */
 | 
			
		||||
    while (av_read_frame(fmt_ctx, &pkt) >= 0)
 | 
			
		||||
        decode_packet(&got_frame, 0);
 | 
			
		||||
 | 
			
		||||
    /* flush cached frames */
 | 
			
		||||
    pkt.data = NULL;
 | 
			
		||||
    pkt.size = 0;
 | 
			
		||||
    do {
 | 
			
		||||
        decode_packet(&got_frame, 1);
 | 
			
		||||
    } while (got_frame);
 | 
			
		||||
 | 
			
		||||
    printf("Demuxing succeeded.\n");
 | 
			
		||||
 | 
			
		||||
    if (video_stream) {
 | 
			
		||||
        printf("Play the output video file with the command:\n"
 | 
			
		||||
               "ffplay -f rawvideo -pix_fmt %s -video_size %dx%d %s\n",
 | 
			
		||||
               av_get_pix_fmt_name(video_dec_ctx->pix_fmt), video_dec_ctx->width, video_dec_ctx->height,
 | 
			
		||||
               video_dst_filename);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    if (audio_stream) {
 | 
			
		||||
        const char *fmt;
 | 
			
		||||
 | 
			
		||||
        if ((ret = get_format_from_sample_fmt(&fmt, audio_dec_ctx->sample_fmt)) < 0)
 | 
			
		||||
            goto end;
 | 
			
		||||
        printf("Play the output audio file with the command:\n"
 | 
			
		||||
               "ffplay -f %s -ac %d -ar %d %s\n",
 | 
			
		||||
               fmt, audio_dec_ctx->channels, audio_dec_ctx->sample_rate,
 | 
			
		||||
               audio_dst_filename);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
end:
 | 
			
		||||
    if (video_dec_ctx)
 | 
			
		||||
        avcodec_close(video_dec_ctx);
 | 
			
		||||
    if (audio_dec_ctx)
 | 
			
		||||
        avcodec_close(audio_dec_ctx);
 | 
			
		||||
    avformat_close_input(&fmt_ctx);
 | 
			
		||||
    if (video_dst_file)
 | 
			
		||||
        fclose(video_dst_file);
 | 
			
		||||
    if (audio_dst_file)
 | 
			
		||||
        fclose(audio_dst_file);
 | 
			
		||||
    av_free(frame);
 | 
			
		||||
    av_free(video_dst_data[0]);
 | 
			
		||||
    av_free(audio_dst_data);
 | 
			
		||||
 | 
			
		||||
    return ret < 0;
 | 
			
		||||
}
 | 
			
		||||
@@ -1,241 +0,0 @@
 | 
			
		||||
/*
 | 
			
		||||
 * Copyright (c) 2010 Nicolas George
 | 
			
		||||
 * Copyright (c) 2011 Stefano Sabatini
 | 
			
		||||
 * Copyright (c) 2012 Clément Bœsch
 | 
			
		||||
 *
 | 
			
		||||
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 | 
			
		||||
 * of this software and associated documentation files (the "Software"), to deal
 | 
			
		||||
 * in the Software without restriction, including without limitation the rights
 | 
			
		||||
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 | 
			
		||||
 * copies of the Software, and to permit persons to whom the Software is
 | 
			
		||||
 * furnished to do so, subject to the following conditions:
 | 
			
		||||
 *
 | 
			
		||||
 * The above copyright notice and this permission notice shall be included in
 | 
			
		||||
 * all copies or substantial portions of the Software.
 | 
			
		||||
 *
 | 
			
		||||
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 | 
			
		||||
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 | 
			
		||||
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 | 
			
		||||
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 | 
			
		||||
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 | 
			
		||||
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 | 
			
		||||
 * THE SOFTWARE.
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * @file
 | 
			
		||||
 * API example for audio decoding and filtering
 | 
			
		||||
 * @example doc/examples/filtering_audio.c
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
#include <unistd.h>
 | 
			
		||||
 | 
			
		||||
#include <libavcodec/avcodec.h>
 | 
			
		||||
#include <libavformat/avformat.h>
 | 
			
		||||
#include <libavfilter/avfiltergraph.h>
 | 
			
		||||
#include <libavfilter/avcodec.h>
 | 
			
		||||
#include <libavfilter/buffersink.h>
 | 
			
		||||
#include <libavfilter/buffersrc.h>
 | 
			
		||||
 | 
			
		||||
const char *filter_descr = "aresample=8000,aconvert=s16:mono";
 | 
			
		||||
const char *player       = "ffplay -f s16le -ar 8000 -ac 1 -";
 | 
			
		||||
 | 
			
		||||
static AVFormatContext *fmt_ctx;
 | 
			
		||||
static AVCodecContext *dec_ctx;
 | 
			
		||||
AVFilterContext *buffersink_ctx;
 | 
			
		||||
AVFilterContext *buffersrc_ctx;
 | 
			
		||||
AVFilterGraph *filter_graph;
 | 
			
		||||
static int audio_stream_index = -1;
 | 
			
		||||
 | 
			
		||||
static int open_input_file(const char *filename)
 | 
			
		||||
{
 | 
			
		||||
    int ret;
 | 
			
		||||
    AVCodec *dec;
 | 
			
		||||
 | 
			
		||||
    if ((ret = avformat_open_input(&fmt_ctx, filename, NULL, NULL)) < 0) {
 | 
			
		||||
        av_log(NULL, AV_LOG_ERROR, "Cannot open input file\n");
 | 
			
		||||
        return ret;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    if ((ret = avformat_find_stream_info(fmt_ctx, NULL)) < 0) {
 | 
			
		||||
        av_log(NULL, AV_LOG_ERROR, "Cannot find stream information\n");
 | 
			
		||||
        return ret;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* select the audio stream */
 | 
			
		||||
    ret = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_AUDIO, -1, -1, &dec, 0);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        av_log(NULL, AV_LOG_ERROR, "Cannot find a audio stream in the input file\n");
 | 
			
		||||
        return ret;
 | 
			
		||||
    }
 | 
			
		||||
    audio_stream_index = ret;
 | 
			
		||||
    dec_ctx = fmt_ctx->streams[audio_stream_index]->codec;
 | 
			
		||||
 | 
			
		||||
    /* init the audio decoder */
 | 
			
		||||
    if ((ret = avcodec_open2(dec_ctx, dec, NULL)) < 0) {
 | 
			
		||||
        av_log(NULL, AV_LOG_ERROR, "Cannot open audio decoder\n");
 | 
			
		||||
        return ret;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    return 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int init_filters(const char *filters_descr)
 | 
			
		||||
{
 | 
			
		||||
    char args[512];
 | 
			
		||||
    int ret;
 | 
			
		||||
    AVFilter *abuffersrc  = avfilter_get_by_name("abuffer");
 | 
			
		||||
    AVFilter *abuffersink = avfilter_get_by_name("ffabuffersink");
 | 
			
		||||
    AVFilterInOut *outputs = avfilter_inout_alloc();
 | 
			
		||||
    AVFilterInOut *inputs  = avfilter_inout_alloc();
 | 
			
		||||
    const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, -1 };
 | 
			
		||||
    AVABufferSinkParams *abuffersink_params;
 | 
			
		||||
    const AVFilterLink *outlink;
 | 
			
		||||
    AVRational time_base = fmt_ctx->streams[audio_stream_index]->time_base;
 | 
			
		||||
 | 
			
		||||
    filter_graph = avfilter_graph_alloc();
 | 
			
		||||
 | 
			
		||||
    /* buffer audio source: the decoded frames from the decoder will be inserted here. */
 | 
			
		||||
    if (!dec_ctx->channel_layout)
 | 
			
		||||
        dec_ctx->channel_layout = av_get_default_channel_layout(dec_ctx->channels);
 | 
			
		||||
    snprintf(args, sizeof(args),
 | 
			
		||||
            "time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=0x%"PRIx64,
 | 
			
		||||
             time_base.num, time_base.den, dec_ctx->sample_rate,
 | 
			
		||||
             av_get_sample_fmt_name(dec_ctx->sample_fmt), dec_ctx->channel_layout);
 | 
			
		||||
    ret = avfilter_graph_create_filter(&buffersrc_ctx, abuffersrc, "in",
 | 
			
		||||
                                       args, NULL, filter_graph);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer source\n");
 | 
			
		||||
        return ret;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* buffer audio sink: to terminate the filter chain. */
 | 
			
		||||
    abuffersink_params = av_abuffersink_params_alloc();
 | 
			
		||||
    abuffersink_params->sample_fmts     = sample_fmts;
 | 
			
		||||
    ret = avfilter_graph_create_filter(&buffersink_ctx, abuffersink, "out",
 | 
			
		||||
                                       NULL, abuffersink_params, filter_graph);
 | 
			
		||||
    av_free(abuffersink_params);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer sink\n");
 | 
			
		||||
        return ret;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* Endpoints for the filter graph. */
 | 
			
		||||
    outputs->name       = av_strdup("in");
 | 
			
		||||
    outputs->filter_ctx = buffersrc_ctx;
 | 
			
		||||
    outputs->pad_idx    = 0;
 | 
			
		||||
    outputs->next       = NULL;
 | 
			
		||||
 | 
			
		||||
    inputs->name       = av_strdup("out");
 | 
			
		||||
    inputs->filter_ctx = buffersink_ctx;
 | 
			
		||||
    inputs->pad_idx    = 0;
 | 
			
		||||
    inputs->next       = NULL;
 | 
			
		||||
 | 
			
		||||
    if ((ret = avfilter_graph_parse(filter_graph, filters_descr,
 | 
			
		||||
                                    &inputs, &outputs, NULL)) < 0)
 | 
			
		||||
        return ret;
 | 
			
		||||
 | 
			
		||||
    if ((ret = avfilter_graph_config(filter_graph, NULL)) < 0)
 | 
			
		||||
        return ret;
 | 
			
		||||
 | 
			
		||||
    /* Print summary of the sink buffer
 | 
			
		||||
     * Note: args buffer is reused to store channel layout string */
 | 
			
		||||
    outlink = buffersink_ctx->inputs[0];
 | 
			
		||||
    av_get_channel_layout_string(args, sizeof(args), -1, outlink->channel_layout);
 | 
			
		||||
    av_log(NULL, AV_LOG_INFO, "Output: srate:%dHz fmt:%s chlayout:%s\n",
 | 
			
		||||
           (int)outlink->sample_rate,
 | 
			
		||||
           (char *)av_x_if_null(av_get_sample_fmt_name(outlink->format), "?"),
 | 
			
		||||
           args);
 | 
			
		||||
 | 
			
		||||
    return 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static void print_samplesref(AVFilterBufferRef *samplesref)
 | 
			
		||||
{
 | 
			
		||||
    const AVFilterBufferRefAudioProps *props = samplesref->audio;
 | 
			
		||||
    const int n = props->nb_samples * av_get_channel_layout_nb_channels(props->channel_layout);
 | 
			
		||||
    const uint16_t *p     = (uint16_t*)samplesref->data[0];
 | 
			
		||||
    const uint16_t *p_end = p + n;
 | 
			
		||||
 | 
			
		||||
    while (p < p_end) {
 | 
			
		||||
        fputc(*p    & 0xff, stdout);
 | 
			
		||||
        fputc(*p>>8 & 0xff, stdout);
 | 
			
		||||
        p++;
 | 
			
		||||
    }
 | 
			
		||||
    fflush(stdout);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
int main(int argc, char **argv)
 | 
			
		||||
{
 | 
			
		||||
    int ret;
 | 
			
		||||
    AVPacket packet;
 | 
			
		||||
    AVFrame frame;
 | 
			
		||||
    int got_frame;
 | 
			
		||||
 | 
			
		||||
    if (argc != 2) {
 | 
			
		||||
        fprintf(stderr, "Usage: %s file | %s\n", argv[0], player);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    avcodec_register_all();
 | 
			
		||||
    av_register_all();
 | 
			
		||||
    avfilter_register_all();
 | 
			
		||||
 | 
			
		||||
    if ((ret = open_input_file(argv[1])) < 0)
 | 
			
		||||
        goto end;
 | 
			
		||||
    if ((ret = init_filters(filter_descr)) < 0)
 | 
			
		||||
        goto end;
 | 
			
		||||
 | 
			
		||||
    /* read all packets */
 | 
			
		||||
    while (1) {
 | 
			
		||||
        AVFilterBufferRef *samplesref;
 | 
			
		||||
        if ((ret = av_read_frame(fmt_ctx, &packet)) < 0)
 | 
			
		||||
            break;
 | 
			
		||||
 | 
			
		||||
        if (packet.stream_index == audio_stream_index) {
 | 
			
		||||
            avcodec_get_frame_defaults(&frame);
 | 
			
		||||
            got_frame = 0;
 | 
			
		||||
            ret = avcodec_decode_audio4(dec_ctx, &frame, &got_frame, &packet);
 | 
			
		||||
            if (ret < 0) {
 | 
			
		||||
                av_log(NULL, AV_LOG_ERROR, "Error decoding audio\n");
 | 
			
		||||
                continue;
 | 
			
		||||
            }
 | 
			
		||||
 | 
			
		||||
            if (got_frame) {
 | 
			
		||||
                /* push the audio data from decoded frame into the filtergraph */
 | 
			
		||||
                if (av_buffersrc_add_frame(buffersrc_ctx, &frame, 0) < 0) {
 | 
			
		||||
                    av_log(NULL, AV_LOG_ERROR, "Error while feeding the audio filtergraph\n");
 | 
			
		||||
                    break;
 | 
			
		||||
                }
 | 
			
		||||
 | 
			
		||||
                /* pull filtered audio from the filtergraph */
 | 
			
		||||
                while (1) {
 | 
			
		||||
                    ret = av_buffersink_get_buffer_ref(buffersink_ctx, &samplesref, 0);
 | 
			
		||||
                    if(ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
 | 
			
		||||
                        break;
 | 
			
		||||
                    if(ret < 0)
 | 
			
		||||
                        goto end;
 | 
			
		||||
                    if (samplesref) {
 | 
			
		||||
                        print_samplesref(samplesref);
 | 
			
		||||
                        avfilter_unref_bufferp(&samplesref);
 | 
			
		||||
                    }
 | 
			
		||||
                }
 | 
			
		||||
            }
 | 
			
		||||
        }
 | 
			
		||||
        av_free_packet(&packet);
 | 
			
		||||
    }
 | 
			
		||||
end:
 | 
			
		||||
    avfilter_graph_free(&filter_graph);
 | 
			
		||||
    if (dec_ctx)
 | 
			
		||||
        avcodec_close(dec_ctx);
 | 
			
		||||
    avformat_close_input(&fmt_ctx);
 | 
			
		||||
 | 
			
		||||
    if (ret < 0 && ret != AVERROR_EOF) {
 | 
			
		||||
        char buf[1024];
 | 
			
		||||
        av_strerror(ret, buf, sizeof(buf));
 | 
			
		||||
        fprintf(stderr, "Error occurred: %s\n", buf);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    exit(0);
 | 
			
		||||
}
 | 
			
		||||
@@ -1,248 +0,0 @@
 | 
			
		||||
/*
 | 
			
		||||
 * Copyright (c) 2010 Nicolas George
 | 
			
		||||
 * Copyright (c) 2011 Stefano Sabatini
 | 
			
		||||
 *
 | 
			
		||||
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 | 
			
		||||
 * of this software and associated documentation files (the "Software"), to deal
 | 
			
		||||
 * in the Software without restriction, including without limitation the rights
 | 
			
		||||
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 | 
			
		||||
 * copies of the Software, and to permit persons to whom the Software is
 | 
			
		||||
 * furnished to do so, subject to the following conditions:
 | 
			
		||||
 *
 | 
			
		||||
 * The above copyright notice and this permission notice shall be included in
 | 
			
		||||
 * all copies or substantial portions of the Software.
 | 
			
		||||
 *
 | 
			
		||||
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 | 
			
		||||
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 | 
			
		||||
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 | 
			
		||||
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 | 
			
		||||
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 | 
			
		||||
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 | 
			
		||||
 * THE SOFTWARE.
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * @file
 | 
			
		||||
 * API example for decoding and filtering
 | 
			
		||||
 * @example doc/examples/filtering_video.c
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
#define _XOPEN_SOURCE 600 /* for usleep */
 | 
			
		||||
#include <unistd.h>
 | 
			
		||||
 | 
			
		||||
#include <libavcodec/avcodec.h>
 | 
			
		||||
#include <libavformat/avformat.h>
 | 
			
		||||
#include <libavfilter/avfiltergraph.h>
 | 
			
		||||
#include <libavfilter/avcodec.h>
 | 
			
		||||
#include <libavfilter/buffersink.h>
 | 
			
		||||
#include <libavfilter/buffersrc.h>
 | 
			
		||||
 | 
			
		||||
const char *filter_descr = "scale=78:24";
 | 
			
		||||
 | 
			
		||||
static AVFormatContext *fmt_ctx;
 | 
			
		||||
static AVCodecContext *dec_ctx;
 | 
			
		||||
AVFilterContext *buffersink_ctx;
 | 
			
		||||
AVFilterContext *buffersrc_ctx;
 | 
			
		||||
AVFilterGraph *filter_graph;
 | 
			
		||||
static int video_stream_index = -1;
 | 
			
		||||
static int64_t last_pts = AV_NOPTS_VALUE;
 | 
			
		||||
 | 
			
		||||
static int open_input_file(const char *filename)
 | 
			
		||||
{
 | 
			
		||||
    int ret;
 | 
			
		||||
    AVCodec *dec;
 | 
			
		||||
 | 
			
		||||
    if ((ret = avformat_open_input(&fmt_ctx, filename, NULL, NULL)) < 0) {
 | 
			
		||||
        av_log(NULL, AV_LOG_ERROR, "Cannot open input file\n");
 | 
			
		||||
        return ret;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    if ((ret = avformat_find_stream_info(fmt_ctx, NULL)) < 0) {
 | 
			
		||||
        av_log(NULL, AV_LOG_ERROR, "Cannot find stream information\n");
 | 
			
		||||
        return ret;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* select the video stream */
 | 
			
		||||
    ret = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, &dec, 0);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        av_log(NULL, AV_LOG_ERROR, "Cannot find a video stream in the input file\n");
 | 
			
		||||
        return ret;
 | 
			
		||||
    }
 | 
			
		||||
    video_stream_index = ret;
 | 
			
		||||
    dec_ctx = fmt_ctx->streams[video_stream_index]->codec;
 | 
			
		||||
 | 
			
		||||
    /* init the video decoder */
 | 
			
		||||
    if ((ret = avcodec_open2(dec_ctx, dec, NULL)) < 0) {
 | 
			
		||||
        av_log(NULL, AV_LOG_ERROR, "Cannot open video decoder\n");
 | 
			
		||||
        return ret;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    return 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int init_filters(const char *filters_descr)
 | 
			
		||||
{
 | 
			
		||||
    char args[512];
 | 
			
		||||
    int ret;
 | 
			
		||||
    AVFilter *buffersrc  = avfilter_get_by_name("buffer");
 | 
			
		||||
    AVFilter *buffersink = avfilter_get_by_name("ffbuffersink");
 | 
			
		||||
    AVFilterInOut *outputs = avfilter_inout_alloc();
 | 
			
		||||
    AVFilterInOut *inputs  = avfilter_inout_alloc();
 | 
			
		||||
    enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE };
 | 
			
		||||
    AVBufferSinkParams *buffersink_params;
 | 
			
		||||
 | 
			
		||||
    filter_graph = avfilter_graph_alloc();
 | 
			
		||||
 | 
			
		||||
    /* buffer video source: the decoded frames from the decoder will be inserted here. */
 | 
			
		||||
    snprintf(args, sizeof(args),
 | 
			
		||||
            "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
 | 
			
		||||
            dec_ctx->width, dec_ctx->height, dec_ctx->pix_fmt,
 | 
			
		||||
            dec_ctx->time_base.num, dec_ctx->time_base.den,
 | 
			
		||||
            dec_ctx->sample_aspect_ratio.num, dec_ctx->sample_aspect_ratio.den);
 | 
			
		||||
 | 
			
		||||
    ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in",
 | 
			
		||||
                                       args, NULL, filter_graph);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        av_log(NULL, AV_LOG_ERROR, "Cannot create buffer source\n");
 | 
			
		||||
        return ret;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* buffer video sink: to terminate the filter chain. */
 | 
			
		||||
    buffersink_params = av_buffersink_params_alloc();
 | 
			
		||||
    buffersink_params->pixel_fmts = pix_fmts;
 | 
			
		||||
    ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out",
 | 
			
		||||
                                       NULL, buffersink_params, filter_graph);
 | 
			
		||||
    av_free(buffersink_params);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        av_log(NULL, AV_LOG_ERROR, "Cannot create buffer sink\n");
 | 
			
		||||
        return ret;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* Endpoints for the filter graph. */
 | 
			
		||||
    outputs->name       = av_strdup("in");
 | 
			
		||||
    outputs->filter_ctx = buffersrc_ctx;
 | 
			
		||||
    outputs->pad_idx    = 0;
 | 
			
		||||
    outputs->next       = NULL;
 | 
			
		||||
 | 
			
		||||
    inputs->name       = av_strdup("out");
 | 
			
		||||
    inputs->filter_ctx = buffersink_ctx;
 | 
			
		||||
    inputs->pad_idx    = 0;
 | 
			
		||||
    inputs->next       = NULL;
 | 
			
		||||
 | 
			
		||||
    if ((ret = avfilter_graph_parse(filter_graph, filters_descr,
 | 
			
		||||
                                    &inputs, &outputs, NULL)) < 0)
 | 
			
		||||
        return ret;
 | 
			
		||||
 | 
			
		||||
    if ((ret = avfilter_graph_config(filter_graph, NULL)) < 0)
 | 
			
		||||
        return ret;
 | 
			
		||||
    return 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static void display_picref(AVFilterBufferRef *picref, AVRational time_base)
 | 
			
		||||
{
 | 
			
		||||
    int x, y;
 | 
			
		||||
    uint8_t *p0, *p;
 | 
			
		||||
    int64_t delay;
 | 
			
		||||
 | 
			
		||||
    if (picref->pts != AV_NOPTS_VALUE) {
 | 
			
		||||
        if (last_pts != AV_NOPTS_VALUE) {
 | 
			
		||||
            /* sleep roughly the right amount of time;
 | 
			
		||||
             * usleep is in microseconds, just like AV_TIME_BASE. */
 | 
			
		||||
            delay = av_rescale_q(picref->pts - last_pts,
 | 
			
		||||
                                 time_base, AV_TIME_BASE_Q);
 | 
			
		||||
            if (delay > 0 && delay < 1000000)
 | 
			
		||||
                usleep(delay);
 | 
			
		||||
        }
 | 
			
		||||
        last_pts = picref->pts;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* Trivial ASCII grayscale display. */
 | 
			
		||||
    p0 = picref->data[0];
 | 
			
		||||
    puts("\033c");
 | 
			
		||||
    for (y = 0; y < picref->video->h; y++) {
 | 
			
		||||
        p = p0;
 | 
			
		||||
        for (x = 0; x < picref->video->w; x++)
 | 
			
		||||
            putchar(" .-+#"[*(p++) / 52]);
 | 
			
		||||
        putchar('\n');
 | 
			
		||||
        p0 += picref->linesize[0];
 | 
			
		||||
    }
 | 
			
		||||
    fflush(stdout);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
int main(int argc, char **argv)
 | 
			
		||||
{
 | 
			
		||||
    int ret;
 | 
			
		||||
    AVPacket packet;
 | 
			
		||||
    AVFrame frame;
 | 
			
		||||
    int got_frame;
 | 
			
		||||
 | 
			
		||||
    if (argc != 2) {
 | 
			
		||||
        fprintf(stderr, "Usage: %s file\n", argv[0]);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    avcodec_register_all();
 | 
			
		||||
    av_register_all();
 | 
			
		||||
    avfilter_register_all();
 | 
			
		||||
 | 
			
		||||
    if ((ret = open_input_file(argv[1])) < 0)
 | 
			
		||||
        goto end;
 | 
			
		||||
    if ((ret = init_filters(filter_descr)) < 0)
 | 
			
		||||
        goto end;
 | 
			
		||||
 | 
			
		||||
    /* read all packets */
 | 
			
		||||
    while (1) {
 | 
			
		||||
        AVFilterBufferRef *picref;
 | 
			
		||||
        if ((ret = av_read_frame(fmt_ctx, &packet)) < 0)
 | 
			
		||||
            break;
 | 
			
		||||
 | 
			
		||||
        if (packet.stream_index == video_stream_index) {
 | 
			
		||||
            avcodec_get_frame_defaults(&frame);
 | 
			
		||||
            got_frame = 0;
 | 
			
		||||
            ret = avcodec_decode_video2(dec_ctx, &frame, &got_frame, &packet);
 | 
			
		||||
            if (ret < 0) {
 | 
			
		||||
                av_log(NULL, AV_LOG_ERROR, "Error decoding video\n");
 | 
			
		||||
                break;
 | 
			
		||||
            }
 | 
			
		||||
 | 
			
		||||
            if (got_frame) {
 | 
			
		||||
                frame.pts = av_frame_get_best_effort_timestamp(&frame);
 | 
			
		||||
 | 
			
		||||
                /* push the decoded frame into the filtergraph */
 | 
			
		||||
                if (av_buffersrc_add_frame(buffersrc_ctx, &frame, 0) < 0) {
 | 
			
		||||
                    av_log(NULL, AV_LOG_ERROR, "Error while feeding the filtergraph\n");
 | 
			
		||||
                    break;
 | 
			
		||||
                }
 | 
			
		||||
 | 
			
		||||
                /* pull filtered pictures from the filtergraph */
 | 
			
		||||
                while (1) {
 | 
			
		||||
                    ret = av_buffersink_get_buffer_ref(buffersink_ctx, &picref, 0);
 | 
			
		||||
                    if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
 | 
			
		||||
                        break;
 | 
			
		||||
                    if (ret < 0)
 | 
			
		||||
                        goto end;
 | 
			
		||||
 | 
			
		||||
                    if (picref) {
 | 
			
		||||
                        display_picref(picref, buffersink_ctx->inputs[0]->time_base);
 | 
			
		||||
                        avfilter_unref_bufferp(&picref);
 | 
			
		||||
                    }
 | 
			
		||||
                }
 | 
			
		||||
            }
 | 
			
		||||
        }
 | 
			
		||||
        av_free_packet(&packet);
 | 
			
		||||
    }
 | 
			
		||||
end:
 | 
			
		||||
    avfilter_graph_free(&filter_graph);
 | 
			
		||||
    if (dec_ctx)
 | 
			
		||||
        avcodec_close(dec_ctx);
 | 
			
		||||
    avformat_close_input(&fmt_ctx);
 | 
			
		||||
 | 
			
		||||
    if (ret < 0 && ret != AVERROR_EOF) {
 | 
			
		||||
        char buf[1024];
 | 
			
		||||
        av_strerror(ret, buf, sizeof(buf));
 | 
			
		||||
        fprintf(stderr, "Error occurred: %s\n", buf);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    exit(0);
 | 
			
		||||
}
 | 
			
		||||
@@ -1,56 +0,0 @@
 | 
			
		||||
/*
 | 
			
		||||
 * Copyright (c) 2011 Reinhard Tartler
 | 
			
		||||
 *
 | 
			
		||||
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 | 
			
		||||
 * of this software and associated documentation files (the "Software"), to deal
 | 
			
		||||
 * in the Software without restriction, including without limitation the rights
 | 
			
		||||
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 | 
			
		||||
 * copies of the Software, and to permit persons to whom the Software is
 | 
			
		||||
 * furnished to do so, subject to the following conditions:
 | 
			
		||||
 *
 | 
			
		||||
 * The above copyright notice and this permission notice shall be included in
 | 
			
		||||
 * all copies or substantial portions of the Software.
 | 
			
		||||
 *
 | 
			
		||||
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 | 
			
		||||
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 | 
			
		||||
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 | 
			
		||||
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 | 
			
		||||
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 | 
			
		||||
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 | 
			
		||||
 * THE SOFTWARE.
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * @file
 | 
			
		||||
 * Shows how the metadata API can be used in application programs.
 | 
			
		||||
 * @example doc/examples/metadata.c
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
#include <stdio.h>
 | 
			
		||||
 | 
			
		||||
#include <libavformat/avformat.h>
 | 
			
		||||
#include <libavutil/dict.h>
 | 
			
		||||
 | 
			
		||||
int main (int argc, char **argv)
 | 
			
		||||
{
 | 
			
		||||
    AVFormatContext *fmt_ctx = NULL;
 | 
			
		||||
    AVDictionaryEntry *tag = NULL;
 | 
			
		||||
    int ret;
 | 
			
		||||
 | 
			
		||||
    if (argc != 2) {
 | 
			
		||||
        printf("usage: %s <input_file>\n"
 | 
			
		||||
               "example program to demonstrate the use of the libavformat metadata API.\n"
 | 
			
		||||
               "\n", argv[0]);
 | 
			
		||||
        return 1;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    av_register_all();
 | 
			
		||||
    if ((ret = avformat_open_input(&fmt_ctx, argv[1], NULL, NULL)))
 | 
			
		||||
        return ret;
 | 
			
		||||
 | 
			
		||||
    while ((tag = av_dict_get(fmt_ctx->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
 | 
			
		||||
        printf("%s=%s\n", tag->key, tag->value);
 | 
			
		||||
 | 
			
		||||
    avformat_close_input(&fmt_ctx);
 | 
			
		||||
    return 0;
 | 
			
		||||
}
 | 
			
		||||
@@ -1,521 +0,0 @@
 | 
			
		||||
/*
 | 
			
		||||
 * Copyright (c) 2003 Fabrice Bellard
 | 
			
		||||
 *
 | 
			
		||||
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 | 
			
		||||
 * of this software and associated documentation files (the "Software"), to deal
 | 
			
		||||
 * in the Software without restriction, including without limitation the rights
 | 
			
		||||
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 | 
			
		||||
 * copies of the Software, and to permit persons to whom the Software is
 | 
			
		||||
 * furnished to do so, subject to the following conditions:
 | 
			
		||||
 *
 | 
			
		||||
 * The above copyright notice and this permission notice shall be included in
 | 
			
		||||
 * all copies or substantial portions of the Software.
 | 
			
		||||
 *
 | 
			
		||||
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 | 
			
		||||
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 | 
			
		||||
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 | 
			
		||||
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 | 
			
		||||
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 | 
			
		||||
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 | 
			
		||||
 * THE SOFTWARE.
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * @file
 | 
			
		||||
 * libavformat API example.
 | 
			
		||||
 *
 | 
			
		||||
 * Output a media file in any supported libavformat format.
 | 
			
		||||
 * The default codecs are used.
 | 
			
		||||
 * @example doc/examples/muxing.c
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
#include <stdlib.h>
 | 
			
		||||
#include <stdio.h>
 | 
			
		||||
#include <string.h>
 | 
			
		||||
#include <math.h>
 | 
			
		||||
 | 
			
		||||
#include <libavutil/mathematics.h>
 | 
			
		||||
#include <libavformat/avformat.h>
 | 
			
		||||
#include <libswscale/swscale.h>
 | 
			
		||||
 | 
			
		||||
/* 5 seconds stream duration */
 | 
			
		||||
#define STREAM_DURATION   200.0
 | 
			
		||||
#define STREAM_FRAME_RATE 25 /* 25 images/s */
 | 
			
		||||
#define STREAM_NB_FRAMES  ((int)(STREAM_DURATION * STREAM_FRAME_RATE))
 | 
			
		||||
#define STREAM_PIX_FMT    AV_PIX_FMT_YUV420P /* default pix_fmt */
 | 
			
		||||
 | 
			
		||||
static int sws_flags = SWS_BICUBIC;
 | 
			
		||||
 | 
			
		||||
/**************************************************************/
 | 
			
		||||
/* audio output */
 | 
			
		||||
 | 
			
		||||
static float t, tincr, tincr2;
 | 
			
		||||
static int16_t *samples;
 | 
			
		||||
static int audio_input_frame_size;
 | 
			
		||||
 | 
			
		||||
/* Add an output stream. */
 | 
			
		||||
static AVStream *add_stream(AVFormatContext *oc, AVCodec **codec,
 | 
			
		||||
                            enum AVCodecID codec_id)
 | 
			
		||||
{
 | 
			
		||||
    AVCodecContext *c;
 | 
			
		||||
    AVStream *st;
 | 
			
		||||
 | 
			
		||||
    /* find the encoder */
 | 
			
		||||
    *codec = avcodec_find_encoder(codec_id);
 | 
			
		||||
    if (!(*codec)) {
 | 
			
		||||
        fprintf(stderr, "Could not find encoder for '%s'\n",
 | 
			
		||||
                avcodec_get_name(codec_id));
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    st = avformat_new_stream(oc, *codec);
 | 
			
		||||
    if (!st) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate stream\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
    st->id = oc->nb_streams-1;
 | 
			
		||||
    c = st->codec;
 | 
			
		||||
 | 
			
		||||
    switch ((*codec)->type) {
 | 
			
		||||
    case AVMEDIA_TYPE_AUDIO:
 | 
			
		||||
        st->id = 1;
 | 
			
		||||
        c->sample_fmt  = AV_SAMPLE_FMT_S16;
 | 
			
		||||
        c->bit_rate    = 64000;
 | 
			
		||||
        c->sample_rate = 44100;
 | 
			
		||||
        c->channels    = 2;
 | 
			
		||||
        break;
 | 
			
		||||
 | 
			
		||||
    case AVMEDIA_TYPE_VIDEO:
 | 
			
		||||
        avcodec_get_context_defaults3(c, *codec);
 | 
			
		||||
        c->codec_id = codec_id;
 | 
			
		||||
 | 
			
		||||
        c->bit_rate = 400000;
 | 
			
		||||
        /* Resolution must be a multiple of two. */
 | 
			
		||||
        c->width    = 352;
 | 
			
		||||
        c->height   = 288;
 | 
			
		||||
        /* timebase: This is the fundamental unit of time (in seconds) in terms
 | 
			
		||||
         * of which frame timestamps are represented. For fixed-fps content,
 | 
			
		||||
         * timebase should be 1/framerate and timestamp increments should be
 | 
			
		||||
         * identical to 1. */
 | 
			
		||||
        c->time_base.den = STREAM_FRAME_RATE;
 | 
			
		||||
        c->time_base.num = 1;
 | 
			
		||||
        c->gop_size      = 12; /* emit one intra frame every twelve frames at most */
 | 
			
		||||
        c->pix_fmt       = STREAM_PIX_FMT;
 | 
			
		||||
        if (c->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 | 
			
		||||
            /* just for testing, we also add B frames */
 | 
			
		||||
            c->max_b_frames = 2;
 | 
			
		||||
        }
 | 
			
		||||
        if (c->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
 | 
			
		||||
            /* Needed to avoid using macroblocks in which some coeffs overflow.
 | 
			
		||||
             * This does not happen with normal video, it just happens here as
 | 
			
		||||
             * the motion of the chroma plane does not match the luma plane. */
 | 
			
		||||
            c->mb_decision = 2;
 | 
			
		||||
        }
 | 
			
		||||
    break;
 | 
			
		||||
 | 
			
		||||
    default:
 | 
			
		||||
        break;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* Some formats want stream headers to be separate. */
 | 
			
		||||
    if (oc->oformat->flags & AVFMT_GLOBALHEADER)
 | 
			
		||||
        c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 | 
			
		||||
 | 
			
		||||
    return st;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
/**************************************************************/
 | 
			
		||||
/* audio output */
 | 
			
		||||
 | 
			
		||||
static float t, tincr, tincr2;
 | 
			
		||||
static int16_t *samples;
 | 
			
		||||
static int audio_input_frame_size;
 | 
			
		||||
 | 
			
		||||
static void open_audio(AVFormatContext *oc, AVCodec *codec, AVStream *st)
 | 
			
		||||
{
 | 
			
		||||
    AVCodecContext *c;
 | 
			
		||||
    int ret;
 | 
			
		||||
 | 
			
		||||
    c = st->codec;
 | 
			
		||||
 | 
			
		||||
    /* open it */
 | 
			
		||||
    ret = avcodec_open2(c, codec, NULL);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not open audio codec: %s\n", av_err2str(ret));
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* init signal generator */
 | 
			
		||||
    t     = 0;
 | 
			
		||||
    tincr = 2 * M_PI * 110.0 / c->sample_rate;
 | 
			
		||||
    /* increment frequency by 110 Hz per second */
 | 
			
		||||
    tincr2 = 2 * M_PI * 110.0 / c->sample_rate / c->sample_rate;
 | 
			
		||||
 | 
			
		||||
    if (c->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)
 | 
			
		||||
        audio_input_frame_size = 10000;
 | 
			
		||||
    else
 | 
			
		||||
        audio_input_frame_size = c->frame_size;
 | 
			
		||||
    samples = av_malloc(audio_input_frame_size *
 | 
			
		||||
                        av_get_bytes_per_sample(c->sample_fmt) *
 | 
			
		||||
                        c->channels);
 | 
			
		||||
    if (!samples) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate audio samples buffer\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
/* Prepare a 16 bit dummy audio frame of 'frame_size' samples and
 | 
			
		||||
 * 'nb_channels' channels. */
 | 
			
		||||
static void get_audio_frame(int16_t *samples, int frame_size, int nb_channels)
 | 
			
		||||
{
 | 
			
		||||
    int j, i, v;
 | 
			
		||||
    int16_t *q;
 | 
			
		||||
 | 
			
		||||
    q = samples;
 | 
			
		||||
    for (j = 0; j < frame_size; j++) {
 | 
			
		||||
        v = (int)(sin(t) * 10000);
 | 
			
		||||
        for (i = 0; i < nb_channels; i++)
 | 
			
		||||
            *q++ = v;
 | 
			
		||||
        t     += tincr;
 | 
			
		||||
        tincr += tincr2;
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static void write_audio_frame(AVFormatContext *oc, AVStream *st)
 | 
			
		||||
{
 | 
			
		||||
    AVCodecContext *c;
 | 
			
		||||
    AVPacket pkt = { 0 }; // data and size must be 0;
 | 
			
		||||
    AVFrame *frame = avcodec_alloc_frame();
 | 
			
		||||
    int got_packet, ret;
 | 
			
		||||
 | 
			
		||||
    av_init_packet(&pkt);
 | 
			
		||||
    c = st->codec;
 | 
			
		||||
 | 
			
		||||
    get_audio_frame(samples, audio_input_frame_size, c->channels);
 | 
			
		||||
    frame->nb_samples = audio_input_frame_size;
 | 
			
		||||
    avcodec_fill_audio_frame(frame, c->channels, c->sample_fmt,
 | 
			
		||||
                             (uint8_t *)samples,
 | 
			
		||||
                             audio_input_frame_size *
 | 
			
		||||
                             av_get_bytes_per_sample(c->sample_fmt) *
 | 
			
		||||
                             c->channels, 1);
 | 
			
		||||
 | 
			
		||||
    ret = avcodec_encode_audio2(c, &pkt, frame, &got_packet);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        fprintf(stderr, "Error encoding audio frame: %s\n", av_err2str(ret));
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    if (!got_packet)
 | 
			
		||||
        return;
 | 
			
		||||
 | 
			
		||||
    pkt.stream_index = st->index;
 | 
			
		||||
 | 
			
		||||
    /* Write the compressed frame to the media file. */
 | 
			
		||||
    ret = av_interleaved_write_frame(oc, &pkt);
 | 
			
		||||
    if (ret != 0) {
 | 
			
		||||
        fprintf(stderr, "Error while writing audio frame: %s\n",
 | 
			
		||||
                av_err2str(ret));
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
    avcodec_free_frame(&frame);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static void close_audio(AVFormatContext *oc, AVStream *st)
 | 
			
		||||
{
 | 
			
		||||
    avcodec_close(st->codec);
 | 
			
		||||
 | 
			
		||||
    av_free(samples);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
/**************************************************************/
 | 
			
		||||
/* video output */
 | 
			
		||||
 | 
			
		||||
static AVFrame *frame;
 | 
			
		||||
static AVPicture src_picture, dst_picture;
 | 
			
		||||
static int frame_count;
 | 
			
		||||
 | 
			
		||||
static void open_video(AVFormatContext *oc, AVCodec *codec, AVStream *st)
 | 
			
		||||
{
 | 
			
		||||
    int ret;
 | 
			
		||||
    AVCodecContext *c = st->codec;
 | 
			
		||||
 | 
			
		||||
    /* open the codec */
 | 
			
		||||
    ret = avcodec_open2(c, codec, NULL);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not open video codec: %s\n", av_err2str(ret));
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* allocate and init a re-usable frame */
 | 
			
		||||
    frame = avcodec_alloc_frame();
 | 
			
		||||
    if (!frame) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate video frame\n");
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* Allocate the encoded raw picture. */
 | 
			
		||||
    ret = avpicture_alloc(&dst_picture, c->pix_fmt, c->width, c->height);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate picture: %s\n", av_err2str(ret));
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* If the output format is not YUV420P, then a temporary YUV420P
 | 
			
		||||
     * picture is needed too. It is then converted to the required
 | 
			
		||||
     * output format. */
 | 
			
		||||
    if (c->pix_fmt != AV_PIX_FMT_YUV420P) {
 | 
			
		||||
        ret = avpicture_alloc(&src_picture, AV_PIX_FMT_YUV420P, c->width, c->height);
 | 
			
		||||
        if (ret < 0) {
 | 
			
		||||
            fprintf(stderr, "Could not allocate temporary picture: %s\n",
 | 
			
		||||
                    av_err2str(ret));
 | 
			
		||||
            exit(1);
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* copy data and linesize picture pointers to frame */
 | 
			
		||||
    *((AVPicture *)frame) = dst_picture;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
/* Prepare a dummy image. */
 | 
			
		||||
static void fill_yuv_image(AVPicture *pict, int frame_index,
 | 
			
		||||
                           int width, int height)
 | 
			
		||||
{
 | 
			
		||||
    int x, y, i;
 | 
			
		||||
 | 
			
		||||
    i = frame_index;
 | 
			
		||||
 | 
			
		||||
    /* Y */
 | 
			
		||||
    for (y = 0; y < height; y++)
 | 
			
		||||
        for (x = 0; x < width; x++)
 | 
			
		||||
            pict->data[0][y * pict->linesize[0] + x] = x + y + i * 3;
 | 
			
		||||
 | 
			
		||||
    /* Cb and Cr */
 | 
			
		||||
    for (y = 0; y < height / 2; y++) {
 | 
			
		||||
        for (x = 0; x < width / 2; x++) {
 | 
			
		||||
            pict->data[1][y * pict->linesize[1] + x] = 128 + y + i * 2;
 | 
			
		||||
            pict->data[2][y * pict->linesize[2] + x] = 64 + x + i * 5;
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static void write_video_frame(AVFormatContext *oc, AVStream *st)
 | 
			
		||||
{
 | 
			
		||||
    int ret;
 | 
			
		||||
    static struct SwsContext *sws_ctx;
 | 
			
		||||
    AVCodecContext *c = st->codec;
 | 
			
		||||
 | 
			
		||||
    if (frame_count >= STREAM_NB_FRAMES) {
 | 
			
		||||
        /* No more frames to compress. The codec has a latency of a few
 | 
			
		||||
         * frames if using B-frames, so we get the last frames by
 | 
			
		||||
         * passing the same picture again. */
 | 
			
		||||
    } else {
 | 
			
		||||
        if (c->pix_fmt != AV_PIX_FMT_YUV420P) {
 | 
			
		||||
            /* as we only generate a YUV420P picture, we must convert it
 | 
			
		||||
             * to the codec pixel format if needed */
 | 
			
		||||
            if (!sws_ctx) {
 | 
			
		||||
                sws_ctx = sws_getContext(c->width, c->height, AV_PIX_FMT_YUV420P,
 | 
			
		||||
                                         c->width, c->height, c->pix_fmt,
 | 
			
		||||
                                         sws_flags, NULL, NULL, NULL);
 | 
			
		||||
                if (!sws_ctx) {
 | 
			
		||||
                    fprintf(stderr,
 | 
			
		||||
                            "Could not initialize the conversion context\n");
 | 
			
		||||
                    exit(1);
 | 
			
		||||
                }
 | 
			
		||||
            }
 | 
			
		||||
            fill_yuv_image(&src_picture, frame_count, c->width, c->height);
 | 
			
		||||
            sws_scale(sws_ctx,
 | 
			
		||||
                      (const uint8_t * const *)src_picture.data, src_picture.linesize,
 | 
			
		||||
                      0, c->height, dst_picture.data, dst_picture.linesize);
 | 
			
		||||
        } else {
 | 
			
		||||
            fill_yuv_image(&dst_picture, frame_count, c->width, c->height);
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    if (oc->oformat->flags & AVFMT_RAWPICTURE) {
 | 
			
		||||
        /* Raw video case - directly store the picture in the packet */
 | 
			
		||||
        AVPacket pkt;
 | 
			
		||||
        av_init_packet(&pkt);
 | 
			
		||||
 | 
			
		||||
        pkt.flags        |= AV_PKT_FLAG_KEY;
 | 
			
		||||
        pkt.stream_index  = st->index;
 | 
			
		||||
        pkt.data          = dst_picture.data[0];
 | 
			
		||||
        pkt.size          = sizeof(AVPicture);
 | 
			
		||||
 | 
			
		||||
        ret = av_interleaved_write_frame(oc, &pkt);
 | 
			
		||||
    } else {
 | 
			
		||||
        /* encode the image */
 | 
			
		||||
        AVPacket pkt;
 | 
			
		||||
        int got_output;
 | 
			
		||||
 | 
			
		||||
        av_init_packet(&pkt);
 | 
			
		||||
        pkt.data = NULL;    // packet data will be allocated by the encoder
 | 
			
		||||
        pkt.size = 0;
 | 
			
		||||
 | 
			
		||||
        ret = avcodec_encode_video2(c, &pkt, frame, &got_output);
 | 
			
		||||
        if (ret < 0) {
 | 
			
		||||
            fprintf(stderr, "Error encoding video frame: %s\n", av_err2str(ret));
 | 
			
		||||
            exit(1);
 | 
			
		||||
        }
 | 
			
		||||
 | 
			
		||||
        /* If size is zero, it means the image was buffered. */
 | 
			
		||||
        if (got_output) {
 | 
			
		||||
            if (c->coded_frame->key_frame)
 | 
			
		||||
                pkt.flags |= AV_PKT_FLAG_KEY;
 | 
			
		||||
 | 
			
		||||
            pkt.stream_index = st->index;
 | 
			
		||||
 | 
			
		||||
            /* Write the compressed frame to the media file. */
 | 
			
		||||
            ret = av_interleaved_write_frame(oc, &pkt);
 | 
			
		||||
        } else {
 | 
			
		||||
            ret = 0;
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
    if (ret != 0) {
 | 
			
		||||
        fprintf(stderr, "Error while writing video frame: %s\n", av_err2str(ret));
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
    frame_count++;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static void close_video(AVFormatContext *oc, AVStream *st)
 | 
			
		||||
{
 | 
			
		||||
    avcodec_close(st->codec);
 | 
			
		||||
    av_free(src_picture.data[0]);
 | 
			
		||||
    av_free(dst_picture.data[0]);
 | 
			
		||||
    av_free(frame);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
/**************************************************************/
 | 
			
		||||
/* media file output */
 | 
			
		||||
 | 
			
		||||
int main(int argc, char **argv)
 | 
			
		||||
{
 | 
			
		||||
    const char *filename;
 | 
			
		||||
    AVOutputFormat *fmt;
 | 
			
		||||
    AVFormatContext *oc;
 | 
			
		||||
    AVStream *audio_st, *video_st;
 | 
			
		||||
    AVCodec *audio_codec, *video_codec;
 | 
			
		||||
    double audio_pts, video_pts;
 | 
			
		||||
    int ret, i;
 | 
			
		||||
 | 
			
		||||
    /* Initialize libavcodec, and register all codecs and formats. */
 | 
			
		||||
    av_register_all();
 | 
			
		||||
 | 
			
		||||
    if (argc != 2) {
 | 
			
		||||
        printf("usage: %s output_file\n"
 | 
			
		||||
               "API example program to output a media file with libavformat.\n"
 | 
			
		||||
               "This program generates a synthetic audio and video stream, encodes and\n"
 | 
			
		||||
               "muxes them into a file named output_file.\n"
 | 
			
		||||
               "The output format is automatically guessed according to the file extension.\n"
 | 
			
		||||
               "Raw images can also be output by using '%%d' in the filename.\n"
 | 
			
		||||
               "\n", argv[0]);
 | 
			
		||||
        return 1;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    filename = argv[1];
 | 
			
		||||
 | 
			
		||||
    /* allocate the output media context */
 | 
			
		||||
    avformat_alloc_output_context2(&oc, NULL, NULL, filename);
 | 
			
		||||
    if (!oc) {
 | 
			
		||||
        printf("Could not deduce output format from file extension: using MPEG.\n");
 | 
			
		||||
        avformat_alloc_output_context2(&oc, NULL, "mpeg", filename);
 | 
			
		||||
    }
 | 
			
		||||
    if (!oc) {
 | 
			
		||||
        return 1;
 | 
			
		||||
    }
 | 
			
		||||
    fmt = oc->oformat;
 | 
			
		||||
 | 
			
		||||
    /* Add the audio and video streams using the default format codecs
 | 
			
		||||
     * and initialize the codecs. */
 | 
			
		||||
    video_st = NULL;
 | 
			
		||||
    audio_st = NULL;
 | 
			
		||||
 | 
			
		||||
    if (fmt->video_codec != AV_CODEC_ID_NONE) {
 | 
			
		||||
        video_st = add_stream(oc, &video_codec, fmt->video_codec);
 | 
			
		||||
    }
 | 
			
		||||
    if (fmt->audio_codec != AV_CODEC_ID_NONE) {
 | 
			
		||||
        audio_st = add_stream(oc, &audio_codec, fmt->audio_codec);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* Now that all the parameters are set, we can open the audio and
 | 
			
		||||
     * video codecs and allocate the necessary encode buffers. */
 | 
			
		||||
    if (video_st)
 | 
			
		||||
        open_video(oc, video_codec, video_st);
 | 
			
		||||
    if (audio_st)
 | 
			
		||||
        open_audio(oc, audio_codec, audio_st);
 | 
			
		||||
 | 
			
		||||
    av_dump_format(oc, 0, filename, 1);
 | 
			
		||||
 | 
			
		||||
    /* open the output file, if needed */
 | 
			
		||||
    if (!(fmt->flags & AVFMT_NOFILE)) {
 | 
			
		||||
        ret = avio_open(&oc->pb, filename, AVIO_FLAG_WRITE);
 | 
			
		||||
        if (ret < 0) {
 | 
			
		||||
            fprintf(stderr, "Could not open '%s': %s\n", filename,
 | 
			
		||||
                    av_err2str(ret));
 | 
			
		||||
            return 1;
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* Write the stream header, if any. */
 | 
			
		||||
    ret = avformat_write_header(oc, NULL);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        fprintf(stderr, "Error occurred when opening output file: %s\n",
 | 
			
		||||
                av_err2str(ret));
 | 
			
		||||
        return 1;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    if (frame)
 | 
			
		||||
        frame->pts = 0;
 | 
			
		||||
    for (;;) {
 | 
			
		||||
        /* Compute current audio and video time. */
 | 
			
		||||
        if (audio_st)
 | 
			
		||||
            audio_pts = (double)audio_st->pts.val * audio_st->time_base.num / audio_st->time_base.den;
 | 
			
		||||
        else
 | 
			
		||||
            audio_pts = 0.0;
 | 
			
		||||
 | 
			
		||||
        if (video_st)
 | 
			
		||||
            video_pts = (double)video_st->pts.val * video_st->time_base.num /
 | 
			
		||||
                        video_st->time_base.den;
 | 
			
		||||
        else
 | 
			
		||||
            video_pts = 0.0;
 | 
			
		||||
 | 
			
		||||
        if ((!audio_st || audio_pts >= STREAM_DURATION) &&
 | 
			
		||||
            (!video_st || video_pts >= STREAM_DURATION))
 | 
			
		||||
            break;
 | 
			
		||||
 | 
			
		||||
        /* write interleaved audio and video frames */
 | 
			
		||||
        if (!video_st || (video_st && audio_st && audio_pts < video_pts)) {
 | 
			
		||||
            write_audio_frame(oc, audio_st);
 | 
			
		||||
        } else {
 | 
			
		||||
            write_video_frame(oc, video_st);
 | 
			
		||||
            frame->pts += av_rescale_q(1, video_st->codec->time_base, video_st->time_base);
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* Write the trailer, if any. The trailer must be written before you
 | 
			
		||||
     * close the CodecContexts open when you wrote the header; otherwise
 | 
			
		||||
     * av_write_trailer() may try to use memory that was freed on
 | 
			
		||||
     * av_codec_close(). */
 | 
			
		||||
    av_write_trailer(oc);
 | 
			
		||||
 | 
			
		||||
    /* Close each codec. */
 | 
			
		||||
    if (video_st)
 | 
			
		||||
        close_video(oc, video_st);
 | 
			
		||||
    if (audio_st)
 | 
			
		||||
        close_audio(oc, audio_st);
 | 
			
		||||
 | 
			
		||||
    /* Free the streams. */
 | 
			
		||||
    for (i = 0; i < oc->nb_streams; i++) {
 | 
			
		||||
        av_freep(&oc->streams[i]->codec);
 | 
			
		||||
        av_freep(&oc->streams[i]);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    if (!(fmt->flags & AVFMT_NOFILE))
 | 
			
		||||
        /* Close the output file. */
 | 
			
		||||
        avio_close(oc->pb);
 | 
			
		||||
 | 
			
		||||
    /* free the stream */
 | 
			
		||||
    av_free(oc);
 | 
			
		||||
 | 
			
		||||
    return 0;
 | 
			
		||||
}
 | 
			
		||||
@@ -1,223 +0,0 @@
 | 
			
		||||
/*
 | 
			
		||||
 * Copyright (c) 2012 Stefano Sabatini
 | 
			
		||||
 *
 | 
			
		||||
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 | 
			
		||||
 * of this software and associated documentation files (the "Software"), to deal
 | 
			
		||||
 * in the Software without restriction, including without limitation the rights
 | 
			
		||||
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 | 
			
		||||
 * copies of the Software, and to permit persons to whom the Software is
 | 
			
		||||
 * furnished to do so, subject to the following conditions:
 | 
			
		||||
 *
 | 
			
		||||
 * The above copyright notice and this permission notice shall be included in
 | 
			
		||||
 * all copies or substantial portions of the Software.
 | 
			
		||||
 *
 | 
			
		||||
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 | 
			
		||||
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 | 
			
		||||
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 | 
			
		||||
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 | 
			
		||||
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 | 
			
		||||
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 | 
			
		||||
 * THE SOFTWARE.
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * @example doc/examples/resampling_audio.c
 | 
			
		||||
 * libswresample API use example.
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
#include <libavutil/opt.h>
 | 
			
		||||
#include <libavutil/channel_layout.h>
 | 
			
		||||
#include <libavutil/samplefmt.h>
 | 
			
		||||
#include <libswresample/swresample.h>
 | 
			
		||||
 | 
			
		||||
static int get_format_from_sample_fmt(const char **fmt,
 | 
			
		||||
                                      enum AVSampleFormat sample_fmt)
 | 
			
		||||
{
 | 
			
		||||
    int i;
 | 
			
		||||
    struct sample_fmt_entry {
 | 
			
		||||
        enum AVSampleFormat sample_fmt; const char *fmt_be, *fmt_le;
 | 
			
		||||
    } sample_fmt_entries[] = {
 | 
			
		||||
        { AV_SAMPLE_FMT_U8,  "u8",    "u8"    },
 | 
			
		||||
        { AV_SAMPLE_FMT_S16, "s16be", "s16le" },
 | 
			
		||||
        { AV_SAMPLE_FMT_S32, "s32be", "s32le" },
 | 
			
		||||
        { AV_SAMPLE_FMT_FLT, "f32be", "f32le" },
 | 
			
		||||
        { AV_SAMPLE_FMT_DBL, "f64be", "f64le" },
 | 
			
		||||
    };
 | 
			
		||||
    *fmt = NULL;
 | 
			
		||||
 | 
			
		||||
    for (i = 0; i < FF_ARRAY_ELEMS(sample_fmt_entries); i++) {
 | 
			
		||||
        struct sample_fmt_entry *entry = &sample_fmt_entries[i];
 | 
			
		||||
        if (sample_fmt == entry->sample_fmt) {
 | 
			
		||||
            *fmt = AV_NE(entry->fmt_be, entry->fmt_le);
 | 
			
		||||
            return 0;
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    fprintf(stderr,
 | 
			
		||||
            "Sample format %s not supported as output format\n",
 | 
			
		||||
            av_get_sample_fmt_name(sample_fmt));
 | 
			
		||||
    return AVERROR(EINVAL);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * Fill dst buffer with nb_samples, generated starting from t.
 | 
			
		||||
 */
 | 
			
		||||
void fill_samples(double *dst, int nb_samples, int nb_channels, int sample_rate, double *t)
 | 
			
		||||
{
 | 
			
		||||
    int i, j;
 | 
			
		||||
    double tincr = 1.0 / sample_rate, *dstp = dst;
 | 
			
		||||
    const double c = 2 * M_PI * 440.0;
 | 
			
		||||
 | 
			
		||||
    /* generate sin tone with 440Hz frequency and duplicated channels */
 | 
			
		||||
    for (i = 0; i < nb_samples; i++) {
 | 
			
		||||
        *dstp = sin(c * *t);
 | 
			
		||||
        for (j = 1; j < nb_channels; j++)
 | 
			
		||||
            dstp[j] = dstp[0];
 | 
			
		||||
        dstp += nb_channels;
 | 
			
		||||
        *t += tincr;
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
int alloc_samples_array_and_data(uint8_t ***data, int *linesize, int nb_channels,
 | 
			
		||||
                                    int nb_samples, enum AVSampleFormat sample_fmt, int align)
 | 
			
		||||
{
 | 
			
		||||
    int nb_planes = av_sample_fmt_is_planar(sample_fmt) ? nb_channels : 1;
 | 
			
		||||
 | 
			
		||||
    *data = av_malloc(sizeof(*data) * nb_planes);
 | 
			
		||||
    if (!*data)
 | 
			
		||||
        return AVERROR(ENOMEM);
 | 
			
		||||
    return av_samples_alloc(*data, linesize, nb_channels,
 | 
			
		||||
                            nb_samples, sample_fmt, align);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
int main(int argc, char **argv)
 | 
			
		||||
{
 | 
			
		||||
    int64_t src_ch_layout = AV_CH_LAYOUT_STEREO, dst_ch_layout = AV_CH_LAYOUT_SURROUND;
 | 
			
		||||
    int src_rate = 48000, dst_rate = 44100;
 | 
			
		||||
    uint8_t **src_data = NULL, **dst_data = NULL;
 | 
			
		||||
    int src_nb_channels = 0, dst_nb_channels = 0;
 | 
			
		||||
    int src_linesize, dst_linesize;
 | 
			
		||||
    int src_nb_samples = 1024, dst_nb_samples, max_dst_nb_samples;
 | 
			
		||||
    enum AVSampleFormat src_sample_fmt = AV_SAMPLE_FMT_DBL, dst_sample_fmt = AV_SAMPLE_FMT_S16;
 | 
			
		||||
    const char *dst_filename = NULL;
 | 
			
		||||
    FILE *dst_file;
 | 
			
		||||
    int dst_bufsize;
 | 
			
		||||
    const char *fmt;
 | 
			
		||||
    struct SwrContext *swr_ctx;
 | 
			
		||||
    double t;
 | 
			
		||||
    int ret;
 | 
			
		||||
 | 
			
		||||
    if (argc != 2) {
 | 
			
		||||
        fprintf(stderr, "Usage: %s output_file\n"
 | 
			
		||||
                "API example program to show how to resample an audio stream with libswresample.\n"
 | 
			
		||||
                "This program generates a series of audio frames, resamples them to a specified "
 | 
			
		||||
                "output format and rate and saves them to an output file named output_file.\n",
 | 
			
		||||
            argv[0]);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
    dst_filename = argv[1];
 | 
			
		||||
 | 
			
		||||
    dst_file = fopen(dst_filename, "wb");
 | 
			
		||||
    if (!dst_file) {
 | 
			
		||||
        fprintf(stderr, "Could not open destination file %s\n", dst_filename);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* create resampler context */
 | 
			
		||||
    swr_ctx = swr_alloc();
 | 
			
		||||
    if (!swr_ctx) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate resampler context\n");
 | 
			
		||||
        ret = AVERROR(ENOMEM);
 | 
			
		||||
        goto end;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* set options */
 | 
			
		||||
    av_opt_set_int(swr_ctx, "in_channel_layout",    src_ch_layout, 0);
 | 
			
		||||
    av_opt_set_int(swr_ctx, "in_sample_rate",       src_rate, 0);
 | 
			
		||||
    av_opt_set_sample_fmt(swr_ctx, "in_sample_fmt", src_sample_fmt, 0);
 | 
			
		||||
 | 
			
		||||
    av_opt_set_int(swr_ctx, "out_channel_layout",    dst_ch_layout, 0);
 | 
			
		||||
    av_opt_set_int(swr_ctx, "out_sample_rate",       dst_rate, 0);
 | 
			
		||||
    av_opt_set_sample_fmt(swr_ctx, "out_sample_fmt", dst_sample_fmt, 0);
 | 
			
		||||
 | 
			
		||||
    /* initialize the resampling context */
 | 
			
		||||
    if ((ret = swr_init(swr_ctx)) < 0) {
 | 
			
		||||
        fprintf(stderr, "Failed to initialize the resampling context\n");
 | 
			
		||||
        goto end;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* allocate source and destination samples buffers */
 | 
			
		||||
 | 
			
		||||
    src_nb_channels = av_get_channel_layout_nb_channels(src_ch_layout);
 | 
			
		||||
    ret = alloc_samples_array_and_data(&src_data, &src_linesize, src_nb_channels,
 | 
			
		||||
                                       src_nb_samples, src_sample_fmt, 0);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate source samples\n");
 | 
			
		||||
        goto end;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* compute the number of converted samples: buffering is avoided
 | 
			
		||||
     * ensuring that the output buffer will contain at least all the
 | 
			
		||||
     * converted input samples */
 | 
			
		||||
    max_dst_nb_samples = dst_nb_samples =
 | 
			
		||||
        av_rescale_rnd(src_nb_samples, dst_rate, src_rate, AV_ROUND_UP);
 | 
			
		||||
 | 
			
		||||
    /* buffer is going to be directly written to a rawaudio file, no alignment */
 | 
			
		||||
    dst_nb_channels = av_get_channel_layout_nb_channels(dst_ch_layout);
 | 
			
		||||
    ret = alloc_samples_array_and_data(&dst_data, &dst_linesize, dst_nb_channels,
 | 
			
		||||
                                       dst_nb_samples, dst_sample_fmt, 0);
 | 
			
		||||
    if (ret < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate destination samples\n");
 | 
			
		||||
        goto end;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    t = 0;
 | 
			
		||||
    do {
 | 
			
		||||
        /* generate synthetic audio */
 | 
			
		||||
        fill_samples((double *)src_data[0], src_nb_samples, src_nb_channels, src_rate, &t);
 | 
			
		||||
 | 
			
		||||
        /* compute destination number of samples */
 | 
			
		||||
        dst_nb_samples = av_rescale_rnd(swr_get_delay(swr_ctx, src_rate) +
 | 
			
		||||
                                        src_nb_samples, dst_rate, src_rate, AV_ROUND_UP);
 | 
			
		||||
        if (dst_nb_samples > max_dst_nb_samples) {
 | 
			
		||||
            av_free(dst_data[0]);
 | 
			
		||||
            ret = av_samples_alloc(dst_data, &dst_linesize, dst_nb_channels,
 | 
			
		||||
                                   dst_nb_samples, dst_sample_fmt, 1);
 | 
			
		||||
            if (ret < 0)
 | 
			
		||||
                break;
 | 
			
		||||
            max_dst_nb_samples = dst_nb_samples;
 | 
			
		||||
        }
 | 
			
		||||
 | 
			
		||||
        /* convert to destination format */
 | 
			
		||||
        ret = swr_convert(swr_ctx, dst_data, dst_nb_samples, (const uint8_t **)src_data, src_nb_samples);
 | 
			
		||||
        if (ret < 0) {
 | 
			
		||||
            fprintf(stderr, "Error while converting\n");
 | 
			
		||||
            goto end;
 | 
			
		||||
        }
 | 
			
		||||
        dst_bufsize = av_samples_get_buffer_size(&dst_linesize, dst_nb_channels,
 | 
			
		||||
                                                 ret, dst_sample_fmt, 1);
 | 
			
		||||
        printf("t:%f in:%d out:%d\n", t, src_nb_samples, ret);
 | 
			
		||||
        fwrite(dst_data[0], 1, dst_bufsize, dst_file);
 | 
			
		||||
    } while (t < 10);
 | 
			
		||||
 | 
			
		||||
    if ((ret = get_format_from_sample_fmt(&fmt, dst_sample_fmt)) < 0)
 | 
			
		||||
        goto end;
 | 
			
		||||
    fprintf(stderr, "Resampling succeeded. Play the output file with the command:\n"
 | 
			
		||||
            "ffplay -f %s -channel_layout %"PRId64" -channels %d -ar %d %s\n",
 | 
			
		||||
            fmt, dst_ch_layout, dst_nb_channels, dst_rate, dst_filename);
 | 
			
		||||
 | 
			
		||||
end:
 | 
			
		||||
    if (dst_file)
 | 
			
		||||
        fclose(dst_file);
 | 
			
		||||
 | 
			
		||||
    if (src_data)
 | 
			
		||||
        av_freep(&src_data[0]);
 | 
			
		||||
    av_freep(&src_data);
 | 
			
		||||
 | 
			
		||||
    if (dst_data)
 | 
			
		||||
        av_freep(&dst_data[0]);
 | 
			
		||||
    av_freep(&dst_data);
 | 
			
		||||
 | 
			
		||||
    swr_free(&swr_ctx);
 | 
			
		||||
    return ret < 0;
 | 
			
		||||
}
 | 
			
		||||
@@ -1,141 +0,0 @@
 | 
			
		||||
/*
 | 
			
		||||
 * Copyright (c) 2012 Stefano Sabatini
 | 
			
		||||
 *
 | 
			
		||||
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 | 
			
		||||
 * of this software and associated documentation files (the "Software"), to deal
 | 
			
		||||
 * in the Software without restriction, including without limitation the rights
 | 
			
		||||
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 | 
			
		||||
 * copies of the Software, and to permit persons to whom the Software is
 | 
			
		||||
 * furnished to do so, subject to the following conditions:
 | 
			
		||||
 *
 | 
			
		||||
 * The above copyright notice and this permission notice shall be included in
 | 
			
		||||
 * all copies or substantial portions of the Software.
 | 
			
		||||
 *
 | 
			
		||||
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 | 
			
		||||
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 | 
			
		||||
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 | 
			
		||||
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 | 
			
		||||
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 | 
			
		||||
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 | 
			
		||||
 * THE SOFTWARE.
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
/**
 | 
			
		||||
 * @file
 | 
			
		||||
 * libswscale API use example.
 | 
			
		||||
 * @example doc/examples/scaling_video.c
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
#include <libavutil/imgutils.h>
 | 
			
		||||
#include <libavutil/parseutils.h>
 | 
			
		||||
#include <libswscale/swscale.h>
 | 
			
		||||
 | 
			
		||||
static void fill_yuv_image(uint8_t *data[4], int linesize[4],
 | 
			
		||||
                           int width, int height, int frame_index)
 | 
			
		||||
{
 | 
			
		||||
    int x, y;
 | 
			
		||||
 | 
			
		||||
    /* Y */
 | 
			
		||||
    for (y = 0; y < height; y++)
 | 
			
		||||
        for (x = 0; x < width; x++)
 | 
			
		||||
            data[0][y * linesize[0] + x] = x + y + frame_index * 3;
 | 
			
		||||
 | 
			
		||||
    /* Cb and Cr */
 | 
			
		||||
    for (y = 0; y < height / 2; y++) {
 | 
			
		||||
        for (x = 0; x < width / 2; x++) {
 | 
			
		||||
            data[1][y * linesize[1] + x] = 128 + y + frame_index * 2;
 | 
			
		||||
            data[2][y * linesize[2] + x] = 64 + x + frame_index * 5;
 | 
			
		||||
        }
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
int main(int argc, char **argv)
 | 
			
		||||
{
 | 
			
		||||
    uint8_t *src_data[4], *dst_data[4];
 | 
			
		||||
    int src_linesize[4], dst_linesize[4];
 | 
			
		||||
    int src_w = 320, src_h = 240, dst_w, dst_h;
 | 
			
		||||
    enum AVPixelFormat src_pix_fmt = AV_PIX_FMT_YUV420P, dst_pix_fmt = AV_PIX_FMT_RGB24;
 | 
			
		||||
    const char *dst_size = NULL;
 | 
			
		||||
    const char *dst_filename = NULL;
 | 
			
		||||
    FILE *dst_file;
 | 
			
		||||
    int dst_bufsize;
 | 
			
		||||
    struct SwsContext *sws_ctx;
 | 
			
		||||
    int i, ret;
 | 
			
		||||
 | 
			
		||||
    if (argc != 3) {
 | 
			
		||||
        fprintf(stderr, "Usage: %s output_file output_size\n"
 | 
			
		||||
                "API example program to show how to scale an image with libswscale.\n"
 | 
			
		||||
                "This program generates a series of pictures, rescales them to the given "
 | 
			
		||||
                "output_size and saves them to an output file named output_file\n."
 | 
			
		||||
                "\n", argv[0]);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
    dst_filename = argv[1];
 | 
			
		||||
    dst_size     = argv[2];
 | 
			
		||||
 | 
			
		||||
    if (av_parse_video_size(&dst_w, &dst_h, dst_size) < 0) {
 | 
			
		||||
        fprintf(stderr,
 | 
			
		||||
                "Invalid size '%s', must be in the form WxH or a valid size abbreviation\n",
 | 
			
		||||
                dst_size);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    dst_file = fopen(dst_filename, "wb");
 | 
			
		||||
    if (!dst_file) {
 | 
			
		||||
        fprintf(stderr, "Could not open destination file %s\n", dst_filename);
 | 
			
		||||
        exit(1);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* create scaling context */
 | 
			
		||||
    sws_ctx = sws_getContext(src_w, src_h, src_pix_fmt,
 | 
			
		||||
                             dst_w, dst_h, dst_pix_fmt,
 | 
			
		||||
                             SWS_BILINEAR, NULL, NULL, NULL);
 | 
			
		||||
    if (!sws_ctx) {
 | 
			
		||||
        fprintf(stderr,
 | 
			
		||||
                "Impossible to create scale context for the conversion "
 | 
			
		||||
                "fmt:%s s:%dx%d -> fmt:%s s:%dx%d\n",
 | 
			
		||||
                av_get_pix_fmt_name(src_pix_fmt), src_w, src_h,
 | 
			
		||||
                av_get_pix_fmt_name(dst_pix_fmt), dst_w, dst_h);
 | 
			
		||||
        ret = AVERROR(EINVAL);
 | 
			
		||||
        goto end;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* allocate source and destination image buffers */
 | 
			
		||||
    if ((ret = av_image_alloc(src_data, src_linesize,
 | 
			
		||||
                              src_w, src_h, src_pix_fmt, 16)) < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate source image\n");
 | 
			
		||||
        goto end;
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    /* buffer is going to be written to rawvideo file, no alignmnet */
 | 
			
		||||
    if ((ret = av_image_alloc(dst_data, dst_linesize,
 | 
			
		||||
                              dst_w, dst_h, dst_pix_fmt, 1)) < 0) {
 | 
			
		||||
        fprintf(stderr, "Could not allocate destination image\n");
 | 
			
		||||
        goto end;
 | 
			
		||||
    }
 | 
			
		||||
    dst_bufsize = ret;
 | 
			
		||||
 | 
			
		||||
    for (i = 0; i < 100; i++) {
 | 
			
		||||
        /* generate synthetic video */
 | 
			
		||||
        fill_yuv_image(src_data, src_linesize, src_w, src_h, i);
 | 
			
		||||
 | 
			
		||||
        /* convert to destination format */
 | 
			
		||||
        sws_scale(sws_ctx, (const uint8_t * const*)src_data,
 | 
			
		||||
                  src_linesize, 0, src_h, dst_data, dst_linesize);
 | 
			
		||||
 | 
			
		||||
        /* write scaled image to file */
 | 
			
		||||
        fwrite(dst_data[0], 1, dst_bufsize, dst_file);
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    fprintf(stderr, "Scaling succeeded. Play the output file with the command:\n"
 | 
			
		||||
           "ffplay -f rawvideo -pix_fmt %s -video_size %dx%d %s\n",
 | 
			
		||||
           av_get_pix_fmt_name(dst_pix_fmt), dst_w, dst_h, dst_filename);
 | 
			
		||||
 | 
			
		||||
end:
 | 
			
		||||
    if (dst_file)
 | 
			
		||||
        fclose(dst_file);
 | 
			
		||||
    av_freep(&src_data[0]);
 | 
			
		||||
    av_freep(&dst_data[0]);
 | 
			
		||||
    sws_freeContext(sws_ctx);
 | 
			
		||||
    return ret < 0;
 | 
			
		||||
}
 | 
			
		||||
							
								
								
									
										435
									
								
								doc/faq.texi
									
									
									
									
									
								
							
							
						
						
									
										435
									
								
								doc/faq.texi
									
									
									
									
									
								
							@@ -2,15 +2,29 @@
 | 
			
		||||
 | 
			
		||||
@settitle FFmpeg FAQ
 | 
			
		||||
@titlepage
 | 
			
		||||
@sp 7
 | 
			
		||||
@center @titlefont{FFmpeg FAQ}
 | 
			
		||||
@sp 3
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter General Questions
 | 
			
		||||
 | 
			
		||||
@section When will the next FFmpeg version be released? / Why are FFmpeg releases so few and far between?
 | 
			
		||||
 | 
			
		||||
Like most open source projects FFmpeg suffers from a certain lack of
 | 
			
		||||
manpower. For this reason the developers have to prioritize the work
 | 
			
		||||
they do and putting out releases is not at the top of the list, fixing
 | 
			
		||||
bugs and reviewing patches takes precedence. Please don't complain or
 | 
			
		||||
request more timely and/or frequent releases unless you are willing to
 | 
			
		||||
help out creating them.
 | 
			
		||||
 | 
			
		||||
@section I have a problem with an old version of FFmpeg; where should I report it?
 | 
			
		||||
Nowhere. Upgrade to the latest release or if there is no recent release upgrade
 | 
			
		||||
to Subversion HEAD. You could also try to report it. Maybe you will get lucky and
 | 
			
		||||
become the first person in history to get an answer different from "upgrade
 | 
			
		||||
to Subversion HEAD".
 | 
			
		||||
 | 
			
		||||
@section Why doesn't FFmpeg support feature [xyz]?
 | 
			
		||||
 | 
			
		||||
Because no one has taken on that task yet. FFmpeg development is
 | 
			
		||||
@@ -24,6 +38,30 @@ No. Windows DLLs are not portable, bloated and often slow.
 | 
			
		||||
Moreover FFmpeg strives to support all codecs natively.
 | 
			
		||||
A DLL loader is not conducive to that goal.
 | 
			
		||||
 | 
			
		||||
@section My bug report/mail to ffmpeg-devel/user has not received any replies.
 | 
			
		||||
 | 
			
		||||
Likely reasons
 | 
			
		||||
@itemize
 | 
			
		||||
@item We are busy and haven't had time yet to read your report or
 | 
			
		||||
investigate the issue.
 | 
			
		||||
@item You didn't follow bugreports.html.
 | 
			
		||||
@item You didn't use Subversion HEAD.
 | 
			
		||||
@item You reported a segmentation fault without gdb output.
 | 
			
		||||
@item You describe a problem but not how to reproduce it.
 | 
			
		||||
@item It's unclear if you use ffmpeg as command line tool or use
 | 
			
		||||
libav* from another application.
 | 
			
		||||
@item You speak about a video having problems on playback but
 | 
			
		||||
not what you use to play it.
 | 
			
		||||
@item We have no faint clue what you are talking about besides
 | 
			
		||||
that it is related to FFmpeg.
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@section Is there a forum for FFmpeg? I do not like mailing lists.
 | 
			
		||||
 | 
			
		||||
You may view our mailing lists with a more forum-alike look here:
 | 
			
		||||
@url{http://dir.gmane.org/gmane.comp.video.ffmpeg.user},
 | 
			
		||||
but, if you post, please remember that our mailing list rules still apply there.
 | 
			
		||||
 | 
			
		||||
@section I cannot read this file although this format seems to be supported by ffmpeg.
 | 
			
		||||
 | 
			
		||||
Even if ffmpeg can read the container format, it may not support all its
 | 
			
		||||
@@ -47,7 +85,7 @@ The following list of video codecs should work on most Windows systems:
 | 
			
		||||
.asf only
 | 
			
		||||
@item mpeg4
 | 
			
		||||
Only if you have some MPEG-4 codec like ffdshow or Xvid installed.
 | 
			
		||||
@item mpeg1video
 | 
			
		||||
@item mpeg1
 | 
			
		||||
.mpg only
 | 
			
		||||
@end table
 | 
			
		||||
Note, ASF files often have .wmv or .wma extensions in Windows. It should also
 | 
			
		||||
@@ -59,9 +97,9 @@ The following list of audio codecs should work on most Windows systems:
 | 
			
		||||
@table @option
 | 
			
		||||
@item adpcm_ima_wav
 | 
			
		||||
@item adpcm_ms
 | 
			
		||||
@item pcm_s16le
 | 
			
		||||
@item pcm
 | 
			
		||||
always
 | 
			
		||||
@item libmp3lame
 | 
			
		||||
@item mp3
 | 
			
		||||
If some MP3 codec like LAME is installed.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@@ -79,23 +117,11 @@ not a bug they should fix:
 | 
			
		||||
Then again, some of them do not know the difference between an undecidable
 | 
			
		||||
problem and an NP-hard problem...
 | 
			
		||||
 | 
			
		||||
@section I have installed this library with my distro's package manager. Why does @command{configure} not see it?
 | 
			
		||||
 | 
			
		||||
Distributions usually split libraries in several packages. The main package
 | 
			
		||||
contains the files necessary to run programs using the library. The
 | 
			
		||||
development package contains the files necessary to build programs using the
 | 
			
		||||
library. Sometimes, docs and/or data are in a separate package too.
 | 
			
		||||
 | 
			
		||||
To build FFmpeg, you need to install the development package. It is usually
 | 
			
		||||
called @file{libfoo-dev} or @file{libfoo-devel}. You can remove it after the
 | 
			
		||||
build is finished, but be sure to keep the main package.
 | 
			
		||||
 | 
			
		||||
@chapter Usage
 | 
			
		||||
 | 
			
		||||
@section ffmpeg does not work; what is wrong?
 | 
			
		||||
 | 
			
		||||
Try a @code{make distclean} in the ffmpeg source directory before the build.
 | 
			
		||||
If this does not help see
 | 
			
		||||
Try a @code{make distclean} in the ffmpeg source directory before the build. If this does not help see
 | 
			
		||||
(@url{http://ffmpeg.org/bugreports.html}).
 | 
			
		||||
 | 
			
		||||
@section How do I encode single pictures into movies?
 | 
			
		||||
@@ -110,16 +136,7 @@ Then you may run:
 | 
			
		||||
 | 
			
		||||
Notice that @samp{%d} is replaced by the image number.
 | 
			
		||||
 | 
			
		||||
@file{img%03d.jpg} means the sequence @file{img001.jpg}, @file{img002.jpg}, etc.
 | 
			
		||||
 | 
			
		||||
Use the @option{-start_number} option to declare a starting number for
 | 
			
		||||
the sequence. This is useful if your sequence does not start with
 | 
			
		||||
@file{img001.jpg} but is still in a numerical order. The following
 | 
			
		||||
example will start with @file{img100.jpg}:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
  ffmpeg -f image2 -start_number 100 -i img%d.jpg /tmp/a.mpg
 | 
			
		||||
@end example
 | 
			
		||||
@file{img%03d.jpg} means the sequence @file{img001.jpg}, @file{img002.jpg}, etc...
 | 
			
		||||
 | 
			
		||||
If you have large number of pictures to rename, you can use the
 | 
			
		||||
following command to ease the burden. The command, using the bourne
 | 
			
		||||
@@ -128,7 +145,7 @@ that match @code{*jpg} to the @file{/tmp} directory in the sequence of
 | 
			
		||||
@file{img001.jpg}, @file{img002.jpg} and so on.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
  x=1; for i in *jpg; do counter=$(printf %03d $x); ln -s "$i" /tmp/img"$counter".jpg; x=$(($x+1)); done
 | 
			
		||||
  x=1; for i in *jpg; do counter=$(printf %03d $x); ln "$i" /tmp/img"$counter".jpg; x=$(($x+1)); done
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
If you want to sequence them by oldest modified first, substitute
 | 
			
		||||
@@ -142,12 +159,6 @@ Then run:
 | 
			
		||||
 | 
			
		||||
The same logic is used for any image format that ffmpeg reads.
 | 
			
		||||
 | 
			
		||||
You can also use @command{cat} to pipe images to ffmpeg:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
  cat *.jpg | ffmpeg -f image2pipe -c:v mjpeg -i - output.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section How do I encode movie to single pictures?
 | 
			
		||||
 | 
			
		||||
Use:
 | 
			
		||||
@@ -161,15 +172,15 @@ The @file{movie.mpg} used as input will be converted to
 | 
			
		||||
 | 
			
		||||
Instead of relying on file format self-recognition, you may also use
 | 
			
		||||
@table @option
 | 
			
		||||
@item -c:v ppm
 | 
			
		||||
@item -c:v png
 | 
			
		||||
@item -c:v mjpeg
 | 
			
		||||
@item -vcodec ppm
 | 
			
		||||
@item -vcodec png
 | 
			
		||||
@item -vcodec mjpeg
 | 
			
		||||
@end table
 | 
			
		||||
to force the encoding.
 | 
			
		||||
 | 
			
		||||
Applying that to the previous example:
 | 
			
		||||
@example
 | 
			
		||||
  ffmpeg -i movie.mpg -f image2 -c:v mjpeg menu%d.jpg
 | 
			
		||||
  ffmpeg -i movie.mpg -f image2 -vcodec mjpeg menu%d.jpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Beware that there is no "jpeg" codec. Use "mjpeg" instead.
 | 
			
		||||
@@ -184,28 +195,79 @@ quite logical that there is a small reduction of quality. This is not a bug.
 | 
			
		||||
 | 
			
		||||
Use @file{-} as file name.
 | 
			
		||||
 | 
			
		||||
@section Why does the chrominance data seem to be sampled at a different time from the luminance data on bt8x8 captures on Linux?
 | 
			
		||||
 | 
			
		||||
This is a well-known bug in the bt8x8 driver. For 2.4.26 there is a patch at
 | 
			
		||||
(@url{http://svn.ffmpeg.org/michael/trunk/patches/bttv-420-2.4.26.patch?view=co}). This may also
 | 
			
		||||
apply cleanly to other 2.4-series kernels.
 | 
			
		||||
 | 
			
		||||
@section How do I avoid the ugly aliasing artifacts in bt8x8 captures on Linux?
 | 
			
		||||
 | 
			
		||||
Pass 'combfilter=1 lumafilter=1' to the bttv driver. Note though that 'combfilter=1'
 | 
			
		||||
will cause somewhat too strong filtering. A fix is to apply (@url{http://svn.ffmpeg.org/michael/trunk/patches/bttv-comb-2.4.26.patch?view=co})
 | 
			
		||||
or (@url{http://svn.ffmpeg.org/michael/trunk/patches/bttv-comb-2.6.6.patch?view=co})
 | 
			
		||||
and pass 'combfilter=2'.
 | 
			
		||||
 | 
			
		||||
@section -f jpeg doesn't work.
 | 
			
		||||
 | 
			
		||||
Try '-f image2 test%d.jpg'.
 | 
			
		||||
 | 
			
		||||
@section Why can I not change the frame rate?
 | 
			
		||||
@section Why can I not change the framerate?
 | 
			
		||||
 | 
			
		||||
Some codecs, like MPEG-1/2, only allow a small number of fixed frame rates.
 | 
			
		||||
Choose a different codec with the -c:v command line option.
 | 
			
		||||
Some codecs, like MPEG-1/2, only allow a small number of fixed framerates.
 | 
			
		||||
Choose a different codec with the -vcodec command line option.
 | 
			
		||||
 | 
			
		||||
@section How do I encode Xvid or DivX video with ffmpeg?
 | 
			
		||||
 | 
			
		||||
Both Xvid and DivX (version 4+) are implementations of the ISO MPEG-4
 | 
			
		||||
standard (note that there are many other coding formats that use this
 | 
			
		||||
same standard). Thus, use '-c:v mpeg4' to encode in these formats. The
 | 
			
		||||
same standard). Thus, use '-vcodec mpeg4' to encode in these formats. The
 | 
			
		||||
default fourcc stored in an MPEG-4-coded file will be 'FMP4'. If you want
 | 
			
		||||
a different fourcc, use the '-vtag' option. E.g., '-vtag xvid' will
 | 
			
		||||
force the fourcc 'xvid' to be stored as the video fourcc rather than the
 | 
			
		||||
default.
 | 
			
		||||
 | 
			
		||||
@section How do I encode videos which play on the iPod?
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item needed stuff
 | 
			
		||||
-acodec libfaac -vcodec mpeg4 width<=320 height<=240
 | 
			
		||||
@item working stuff
 | 
			
		||||
4mv, title
 | 
			
		||||
@item non-working stuff
 | 
			
		||||
B-frames
 | 
			
		||||
@item example command line
 | 
			
		||||
ffmpeg -i input -acodec libfaac -ab 128kb -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv -trellis 2 -aic 2 -cmp 2 -subcmp 2 -s 320x180 -metadata title=X output.mp4
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section How do I encode videos which play on the PSP?
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item needed stuff
 | 
			
		||||
-acodec libfaac -vcodec mpeg4 width*height<=76800 width%16=0 height%16=0 -ar 24000 -r 30000/1001 or 15000/1001 -f psp
 | 
			
		||||
@item working stuff
 | 
			
		||||
4mv, title
 | 
			
		||||
@item non-working stuff
 | 
			
		||||
B-frames
 | 
			
		||||
@item example command line
 | 
			
		||||
ffmpeg -i input -acodec libfaac -ab 128kb -vcodec mpeg4 -b 1200kb -ar 24000 -mbd 2 -flags +4mv -trellis 2 -aic 2 -cmp 2 -subcmp 2 -s 368x192 -r 30000/1001 -metadata title=X -f psp output.mp4
 | 
			
		||||
@item needed stuff for H.264
 | 
			
		||||
-acodec libfaac -vcodec libx264 width*height<=76800 width%16=0? height%16=0? -ar 48000 -coder 1 -r 30000/1001 or 15000/1001 -f psp
 | 
			
		||||
@item working stuff for H.264
 | 
			
		||||
title, loop filter
 | 
			
		||||
@item non-working stuff for H.264
 | 
			
		||||
CAVLC
 | 
			
		||||
@item example command line
 | 
			
		||||
ffmpeg -i input -acodec libfaac -ab 128kb -vcodec libx264 -b 1200kb -ar 48000 -mbd 2 -coder 1 -cmp 2 -subcmp 2 -s 368x192 -r 30000/1001 -metadata title=X -f psp -flags loop -trellis 2 -partitions parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 output.mp4
 | 
			
		||||
@item higher resolution for newer PSP firmwares, width<=480, height<=272
 | 
			
		||||
-vcodec libx264 -level 21 -coder 1 -f psp
 | 
			
		||||
@item example command line
 | 
			
		||||
ffmpeg -i input -acodec libfaac -ab 128kb -ac 2 -ar 48000 -vcodec libx264 -level 21 -b 640kb -coder 1 -f psp -flags +loop -trellis 2 -partitions +parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 -g 250 -s 480x272 output.mp4
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section Which are good parameters for encoding high quality MPEG-4?
 | 
			
		||||
 | 
			
		||||
'-mbd rd -flags +mv4+aic -trellis 2 -cmp 2 -subcmp 2 -g 300 -pass 1/2',
 | 
			
		||||
'-mbd rd -flags +4mv+aic -trellis 2 -cmp 2 -subcmp 2 -g 300 -pass 1/2',
 | 
			
		||||
things to try: '-bf 2', '-flags qprd', '-flags mv0', '-flags skiprd'.
 | 
			
		||||
 | 
			
		||||
@section Which are good parameters for encoding high quality MPEG-1/MPEG-2?
 | 
			
		||||
@@ -224,78 +286,24 @@ material, and try '-top 0/1' if the result looks really messed-up.
 | 
			
		||||
If you have built FFmpeg with @code{./configure --enable-avisynth}
 | 
			
		||||
(only possible on MinGW/Cygwin platforms),
 | 
			
		||||
then you may use any file that DirectShow can read as input.
 | 
			
		||||
(Be aware that this feature has been recently added,
 | 
			
		||||
so you will need to help yourself in case of problems.)
 | 
			
		||||
 | 
			
		||||
Just create an "input.avs" text file with this single line ...
 | 
			
		||||
@example
 | 
			
		||||
  DirectShowSource("C:\path to your file\yourfile.asf")
 | 
			
		||||
@end example
 | 
			
		||||
... and then feed that text file to ffmpeg:
 | 
			
		||||
... and then feed that text file to FFmpeg:
 | 
			
		||||
@example
 | 
			
		||||
  ffmpeg -i input.avs
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
For ANY other help on Avisynth, please visit the
 | 
			
		||||
@uref{http://www.avisynth.org/, Avisynth homepage}.
 | 
			
		||||
For ANY other help on Avisynth, please visit @url{http://www.avisynth.org/}.
 | 
			
		||||
 | 
			
		||||
@section How can I join video files?
 | 
			
		||||
 | 
			
		||||
To "join" video files is quite ambiguous. The following list explains the
 | 
			
		||||
different kinds of "joining" and points out how those are addressed in
 | 
			
		||||
FFmpeg. To join video files may mean:
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
To put them one after the other: this is called to @emph{concatenate} them
 | 
			
		||||
(in short: concat) and is addressed
 | 
			
		||||
@ref{How can I concatenate video files, in this very faq}.
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
To put them together in the same file, to let the user choose between the
 | 
			
		||||
different versions (example: different audio languages): this is called to
 | 
			
		||||
@emph{multiplex} them together (in short: mux), and is done by simply
 | 
			
		||||
invoking ffmpeg with several @option{-i} options.
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
For audio, to put all channels together in a single stream (example: two
 | 
			
		||||
mono streams into one stereo stream): this is sometimes called to
 | 
			
		||||
@emph{merge} them, and can be done using the
 | 
			
		||||
@url{http://ffmpeg.org/ffmpeg-filters.html#amerge, @code{amerge}} filter.
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
For audio, to play one on top of the other: this is called to @emph{mix}
 | 
			
		||||
them, and can be done by first merging them into a single stream and then
 | 
			
		||||
using the @url{http://ffmpeg.org/ffmpeg-filters.html#pan, @code{pan}} filter to mix
 | 
			
		||||
the channels at will.
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
For video, to display both together, side by side or one on top of a part of
 | 
			
		||||
the other; it can be done using the
 | 
			
		||||
@url{http://ffmpeg.org/ffmpeg-filters.html#overlay, @code{overlay}} video filter.
 | 
			
		||||
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@anchor{How can I concatenate video files}
 | 
			
		||||
@section How can I concatenate video files?
 | 
			
		||||
 | 
			
		||||
There are several solutions, depending on the exact circumstances.
 | 
			
		||||
 | 
			
		||||
@subsection Concatenating using the concat @emph{filter}
 | 
			
		||||
 | 
			
		||||
FFmpeg has a @url{http://ffmpeg.org/ffmpeg-filters.html#concat,
 | 
			
		||||
@code{concat}} filter designed specifically for that, with examples in the
 | 
			
		||||
documentation. This operation is recommended if you need to re-encode.
 | 
			
		||||
 | 
			
		||||
@subsection Concatenating using the concat @emph{demuxer}
 | 
			
		||||
 | 
			
		||||
FFmpeg has a @url{http://www.ffmpeg.org/ffmpeg-formats.html#concat,
 | 
			
		||||
@code{concat}} demuxer which you can use when you want to avoid a re-encode and
 | 
			
		||||
your format doesn't support file level concatenation.
 | 
			
		||||
 | 
			
		||||
@subsection Concatenating using the concat @emph{protocol} (file level)
 | 
			
		||||
 | 
			
		||||
A few multimedia containers (MPEG-1, MPEG-2 PS, DV) allow to concatenate
 | 
			
		||||
video by merely concatenating the files them.
 | 
			
		||||
A few multimedia containers (MPEG-1, MPEG-2 PS, DV) allow to join video files by
 | 
			
		||||
merely concatenating them.
 | 
			
		||||
 | 
			
		||||
Hence you may concatenate your multimedia files by first transcoding them to
 | 
			
		||||
these privileged formats, then using the humble @code{cat} command (or the
 | 
			
		||||
@@ -303,38 +311,28 @@ equally humble @code{copy} under Windows), and finally transcoding back to your
 | 
			
		||||
format of choice.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i input1.avi -qscale:v 1 intermediate1.mpg
 | 
			
		||||
ffmpeg -i input2.avi -qscale:v 1 intermediate2.mpg
 | 
			
		||||
ffmpeg -i input1.avi -sameq intermediate1.mpg
 | 
			
		||||
ffmpeg -i input2.avi -sameq intermediate2.mpg
 | 
			
		||||
cat intermediate1.mpg intermediate2.mpg > intermediate_all.mpg
 | 
			
		||||
ffmpeg -i intermediate_all.mpg -qscale:v 2 output.avi
 | 
			
		||||
ffmpeg -i intermediate_all.mpg -sameq output.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Additionally, you can use the @code{concat} protocol instead of @code{cat} or
 | 
			
		||||
@code{copy} which will avoid creation of a potentially huge intermediate file.
 | 
			
		||||
Notice that you should either use @code{-sameq} or set a reasonably high
 | 
			
		||||
bitrate for your intermediate and output files, if you want to preserve
 | 
			
		||||
video quality.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i input1.avi -qscale:v 1 intermediate1.mpg
 | 
			
		||||
ffmpeg -i input2.avi -qscale:v 1 intermediate2.mpg
 | 
			
		||||
ffmpeg -i concat:"intermediate1.mpg|intermediate2.mpg" -c copy intermediate_all.mpg
 | 
			
		||||
ffmpeg -i intermediate_all.mpg -qscale:v 2 output.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Note that you may need to escape the character "|" which is special for many
 | 
			
		||||
shells.
 | 
			
		||||
 | 
			
		||||
Another option is usage of named pipes, should your platform support it:
 | 
			
		||||
Also notice that you may avoid the huge intermediate files by taking advantage
 | 
			
		||||
of named pipes, should your platform support it:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
mkfifo intermediate1.mpg
 | 
			
		||||
mkfifo intermediate2.mpg
 | 
			
		||||
ffmpeg -i input1.avi -qscale:v 1 -y intermediate1.mpg < /dev/null &
 | 
			
		||||
ffmpeg -i input2.avi -qscale:v 1 -y intermediate2.mpg < /dev/null &
 | 
			
		||||
ffmpeg -i input1.avi -sameq -y intermediate1.mpg < /dev/null &
 | 
			
		||||
ffmpeg -i input2.avi -sameq -y intermediate2.mpg < /dev/null &
 | 
			
		||||
cat intermediate1.mpg intermediate2.mpg |\
 | 
			
		||||
ffmpeg -f mpeg -i - -c:v mpeg4 -acodec libmp3lame output.avi
 | 
			
		||||
ffmpeg -f mpeg -i - -sameq -vcodec mpeg4 -acodec libmp3lame output.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@subsection Concatenating using raw audio and video
 | 
			
		||||
 | 
			
		||||
Similarly, the yuv4mpegpipe format, and the raw video, raw audio codecs also
 | 
			
		||||
allow concatenation, and the transcoding step is almost lossless.
 | 
			
		||||
When using multiple yuv4mpegpipe(s), the first line needs to be discarded
 | 
			
		||||
@@ -342,8 +340,7 @@ from all but the first stream. This can be accomplished by piping through
 | 
			
		||||
@code{tail} as seen below. Note that when piping through @code{tail} you
 | 
			
		||||
must use command grouping, @code{@{  ;@}}, to background properly.
 | 
			
		||||
 | 
			
		||||
For example, let's say we want to concatenate two FLV files into an
 | 
			
		||||
output.flv file:
 | 
			
		||||
For example, let's say we want to join two FLV files into an output.flv file:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
mkfifo temp1.a
 | 
			
		||||
@@ -360,90 +357,33 @@ cat temp1.a temp2.a > all.a &
 | 
			
		||||
cat temp1.v temp2.v > all.v &
 | 
			
		||||
ffmpeg -f u16le -acodec pcm_s16le -ac 2 -ar 44100 -i all.a \
 | 
			
		||||
       -f yuv4mpegpipe -i all.v \
 | 
			
		||||
       -y output.flv
 | 
			
		||||
       -sameq -y output.flv
 | 
			
		||||
rm temp[12].[av] all.[av]
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section -profile option fails when encoding H.264 video with AAC audio
 | 
			
		||||
@section FFmpeg does not adhere to the -maxrate setting, some frames are bigger than maxrate/fps.
 | 
			
		||||
 | 
			
		||||
@command{ffmpeg} prints an error like
 | 
			
		||||
Read the MPEG spec about video buffer verifier.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
Undefined constant or missing '(' in 'baseline'
 | 
			
		||||
Unable to parse option value "baseline"
 | 
			
		||||
Error setting option profile to value baseline.
 | 
			
		||||
@end example
 | 
			
		||||
@section I want CBR, but no matter what I do frame sizes differ.
 | 
			
		||||
 | 
			
		||||
Short answer: write @option{-profile:v} instead of @option{-profile}.
 | 
			
		||||
You do not understand what CBR is, please read the MPEG spec.
 | 
			
		||||
Read about video buffer verifier and constant bitrate.
 | 
			
		||||
The one sentence summary is that there is a buffer and the input rate is
 | 
			
		||||
constant, the output can vary as needed.
 | 
			
		||||
 | 
			
		||||
Long answer: this happens because the @option{-profile} option can apply to both
 | 
			
		||||
video and audio.  Specifically the AAC encoder also defines some profiles, none
 | 
			
		||||
of which are named @var{baseline}.
 | 
			
		||||
@section How do I check if a stream is CBR?
 | 
			
		||||
 | 
			
		||||
The solution is to apply the @option{-profile} option to the video stream only
 | 
			
		||||
by using @url{http://ffmpeg.org/ffmpeg.html#Stream-specifiers-1, Stream specifiers}.
 | 
			
		||||
Appending @code{:v} to it will do exactly that.
 | 
			
		||||
To quote the MPEG-2 spec:
 | 
			
		||||
"There is no way to tell that a bitstream is constant bitrate without
 | 
			
		||||
examining all of the vbv_delay values and making complicated computations."
 | 
			
		||||
 | 
			
		||||
@section Using @option{-f lavfi}, audio becomes mono for no apparent reason.
 | 
			
		||||
 | 
			
		||||
Use @option{-dumpgraph -} to find out exactly where the channel layout is
 | 
			
		||||
lost.
 | 
			
		||||
 | 
			
		||||
Most likely, it is through @code{auto-inserted aconvert}. Try to understand
 | 
			
		||||
why the converting filter was needed at that place.
 | 
			
		||||
 | 
			
		||||
Just before the output is a likely place, as @option{-f lavfi} currently
 | 
			
		||||
only support packed S16.
 | 
			
		||||
 | 
			
		||||
Then insert the correct @code{aconvert} explicitly in the filter graph,
 | 
			
		||||
specifying the exact format.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
aconvert=s16:stereo:packed
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section Why does FFmpeg not see the subtitles in my VOB file?
 | 
			
		||||
 | 
			
		||||
VOB and a few other formats do not have a global header that describes
 | 
			
		||||
everything present in the file. Instead, applications are supposed to scan
 | 
			
		||||
the file to see what it contains. Since VOB files are frequently large, only
 | 
			
		||||
the beginning is scanned. If the subtitles happen only later in the file,
 | 
			
		||||
they will not be initally detected.
 | 
			
		||||
 | 
			
		||||
Some applications, including the @code{ffmpeg} command-line tool, can only
 | 
			
		||||
work with streams that were detected during the initial scan; streams that
 | 
			
		||||
are detected later are ignored.
 | 
			
		||||
 | 
			
		||||
The size of the initial scan is controlled by two options: @code{probesize}
 | 
			
		||||
(default ~5 Mo) and @code{analyzeduration} (default 5,000,000 µs = 5 s). For
 | 
			
		||||
the subtitle stream to be detected, both values must be large enough.
 | 
			
		||||
 | 
			
		||||
@section Why was the @command{ffmpeg} @option{-sameq} option removed? What to use instead?
 | 
			
		||||
 | 
			
		||||
The @option{-sameq} option meant "same quantizer", and made sense only in a
 | 
			
		||||
very limited set of cases. Unfortunately, a lot of people mistook it for
 | 
			
		||||
"same quality" and used it in places where it did not make sense: it had
 | 
			
		||||
roughly the expected visible effect, but achieved it in a very inefficient
 | 
			
		||||
way.
 | 
			
		||||
 | 
			
		||||
Each encoder has its own set of options to set the quality-vs-size balance,
 | 
			
		||||
use the options for the encoder you are using to set the quality level to a
 | 
			
		||||
point acceptable for your tastes. The most common options to do that are
 | 
			
		||||
@option{-qscale} and @option{-qmax}, but you should peruse the documentation
 | 
			
		||||
of the encoder you chose.
 | 
			
		||||
 | 
			
		||||
@chapter Development
 | 
			
		||||
 | 
			
		||||
@section Are there examples illustrating how to use the FFmpeg libraries, particularly libavcodec and libavformat?
 | 
			
		||||
 | 
			
		||||
Yes. Check the @file{doc/examples} directory in the source
 | 
			
		||||
repository, also available online at:
 | 
			
		||||
@url{https://github.com/FFmpeg/FFmpeg/tree/master/doc/examples}.
 | 
			
		||||
 | 
			
		||||
Examples are also installed by default, usually in
 | 
			
		||||
@code{$PREFIX/share/ffmpeg/examples}.
 | 
			
		||||
 | 
			
		||||
Also you may read the Developers Guide of the FFmpeg documentation. Alternatively,
 | 
			
		||||
Yes. Read the Developers Guide of the FFmpeg documentation. Alternatively,
 | 
			
		||||
examine the source code for one of the many open source projects that
 | 
			
		||||
already incorporate FFmpeg at (@url{projects.html}).
 | 
			
		||||
 | 
			
		||||
@@ -455,51 +395,64 @@ with @code{#ifdef}s related to the compiler.
 | 
			
		||||
 | 
			
		||||
@section Is Microsoft Visual C++ supported?
 | 
			
		||||
 | 
			
		||||
Yes. Please see the @uref{platform.html, Microsoft Visual C++}
 | 
			
		||||
section in the FFmpeg documentation.
 | 
			
		||||
No. Microsoft Visual C++ is not compliant to the C99 standard and does
 | 
			
		||||
not - among other things - support the inline assembly used in FFmpeg.
 | 
			
		||||
If you wish to use MSVC++ for your
 | 
			
		||||
project then you can link the MSVC++ code with libav* as long as
 | 
			
		||||
you compile the latter with a working C compiler. For more information, see
 | 
			
		||||
the @emph{Microsoft Visual C++ compatibility} section in the FFmpeg
 | 
			
		||||
documentation.
 | 
			
		||||
 | 
			
		||||
There have been efforts to make FFmpeg compatible with MSVC++ in the
 | 
			
		||||
past. However, they have all been rejected as too intrusive, especially
 | 
			
		||||
since MinGW does the job adequately. None of the core developers
 | 
			
		||||
work with MSVC++ and thus this item is low priority. Should you find
 | 
			
		||||
the silver bullet that solves this problem, feel free to shoot it at us.
 | 
			
		||||
 | 
			
		||||
We strongly recommend you to move over from MSVC++ to MinGW tools.
 | 
			
		||||
 | 
			
		||||
@section Can I use FFmpeg or libavcodec under Windows?
 | 
			
		||||
 | 
			
		||||
Yes, but the Cygwin or MinGW tools @emph{must} be used to compile FFmpeg.
 | 
			
		||||
Read the @emph{Windows} section in the FFmpeg documentation to find more
 | 
			
		||||
information.
 | 
			
		||||
 | 
			
		||||
To get help and instructions for building FFmpeg under Windows, check out
 | 
			
		||||
the FFmpeg Windows Help Forum at
 | 
			
		||||
@url{http://ffmpeg.arrozcru.org/}.
 | 
			
		||||
 | 
			
		||||
@section Can you add automake, libtool or autoconf support?
 | 
			
		||||
 | 
			
		||||
No. These tools are too bloated and they complicate the build.
 | 
			
		||||
 | 
			
		||||
@section Why not rewrite FFmpeg in object-oriented C++?
 | 
			
		||||
@section Why not rewrite ffmpeg in object-oriented C++?
 | 
			
		||||
 | 
			
		||||
FFmpeg is already organized in a highly modular manner and does not need to
 | 
			
		||||
be rewritten in a formal object language. Further, many of the developers
 | 
			
		||||
favor straight C; it works for them. For more arguments on this matter,
 | 
			
		||||
read @uref{http://www.tux.org/lkml/#s15, "Programming Religion"}.
 | 
			
		||||
read "Programming Religion" at (@url{http://www.tux.org/lkml/#s15}).
 | 
			
		||||
 | 
			
		||||
@section Why are the ffmpeg programs devoid of debugging symbols?
 | 
			
		||||
 | 
			
		||||
The build process creates ffmpeg_g, ffplay_g, etc. which contain full debug
 | 
			
		||||
information. Those binaries are stripped to create ffmpeg, ffplay, etc. If
 | 
			
		||||
you need the debug information, use the *_g versions.
 | 
			
		||||
you need the debug information, used the *_g versions.
 | 
			
		||||
 | 
			
		||||
@section I do not like the LGPL, can I contribute code under the GPL instead?
 | 
			
		||||
 | 
			
		||||
Yes, as long as the code is optional and can easily and cleanly be placed
 | 
			
		||||
under #if CONFIG_GPL without breaking anything. So, for example, a new codec
 | 
			
		||||
under #if CONFIG_GPL without breaking anything. So for example a new codec
 | 
			
		||||
or filter would be OK under GPL while a bug fix to LGPL code would not.
 | 
			
		||||
 | 
			
		||||
@section I'm using FFmpeg from within my C application but the linker complains about missing symbols from the libraries themselves.
 | 
			
		||||
@section I want to compile xyz.c alone but my compiler produced many errors.
 | 
			
		||||
 | 
			
		||||
FFmpeg builds static libraries by default. In static libraries, dependencies
 | 
			
		||||
are not handled. That has two consequences. First, you must specify the
 | 
			
		||||
libraries in dependency order: @code{-lavdevice} must come before
 | 
			
		||||
@code{-lavformat}, @code{-lavutil} must come after everything else, etc.
 | 
			
		||||
Second, external libraries that are used in FFmpeg have to be specified too.
 | 
			
		||||
Common code is in its own files in libav* and is used by the individual
 | 
			
		||||
codecs. They will not work without the common parts, you have to compile
 | 
			
		||||
the whole libav*. If you wish, disable some parts with configure switches.
 | 
			
		||||
You can also try to hack it and remove more, but if you had problems fixing
 | 
			
		||||
the compilation failure then you are probably not qualified for this.
 | 
			
		||||
 | 
			
		||||
An easy way to get the full list of required libraries in dependency order
 | 
			
		||||
is to use @code{pkg-config}.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
  c99 -o program program.c $(pkg-config --cflags --libs libavformat libavcodec)
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
See @file{doc/example/Makefile} and @file{doc/example/pc-uninstalled} for
 | 
			
		||||
more details.
 | 
			
		||||
 | 
			
		||||
@section I'm using FFmpeg from within my C++ application but the linker complains about missing symbols which seem to be available.
 | 
			
		||||
@section I'm using libavcodec from within my C++ application but the linker complains about missing symbols which seem to be available.
 | 
			
		||||
 | 
			
		||||
FFmpeg is a pure C project, so to use the libraries within your C++ application
 | 
			
		||||
you need to explicitly state that you are using a C library. You can do this by
 | 
			
		||||
@@ -507,15 +460,23 @@ encompassing your FFmpeg includes using @code{extern "C"}.
 | 
			
		||||
 | 
			
		||||
See @url{http://www.parashift.com/c++-faq-lite/mixing-c-and-cpp.html#faq-32.3}
 | 
			
		||||
 | 
			
		||||
@section I'm using libavutil from within my C++ application but the compiler complains about 'UINT64_C' was not declared in this scope
 | 
			
		||||
 | 
			
		||||
FFmpeg is a pure C project using C99 math features, in order to enable C++
 | 
			
		||||
to use them you have to append -D__STDC_CONSTANT_MACROS to your CXXFLAGS
 | 
			
		||||
 | 
			
		||||
@section I have a file in memory / a API different from *open/*read/ libc how do I use it with libavformat?
 | 
			
		||||
 | 
			
		||||
You have to create a custom AVIOContext using @code{avio_alloc_context},
 | 
			
		||||
see @file{libavformat/aviobuf.c} in FFmpeg and @file{libmpdemux/demux_lavf.c} in MPlayer or MPlayer2 sources.
 | 
			
		||||
You have to implement a URLProtocol, see libavformat/file.c in FFmpeg
 | 
			
		||||
and libmpdemux/demux_lavf.c in MPlayer sources.
 | 
			
		||||
 | 
			
		||||
@section I get "No compatible shell script interpreter found." in MSys.
 | 
			
		||||
 | 
			
		||||
The standard MSys bash (2.04) is broken. You need to install 2.05 or later.
 | 
			
		||||
 | 
			
		||||
@section I get "./configure: line <xxx>: pr: command not found" in MSys.
 | 
			
		||||
 | 
			
		||||
The standard MSys install doesn't come with pr. You need to get it from the coreutils package.
 | 
			
		||||
 | 
			
		||||
@section I tried to pass RTP packets into a decoder, but it doesn't work.
 | 
			
		||||
 | 
			
		||||
RTP is a container format like any other, you must first depacketize the
 | 
			
		||||
codec frames/samples stored in RTP and then feed to the decoder.
 | 
			
		||||
 | 
			
		||||
@section Where can I find libav* headers for Pascal/Delphi?
 | 
			
		||||
 | 
			
		||||
@@ -523,7 +484,7 @@ see @url{http://www.iversenit.dk/dev/ffmpeg-headers/}
 | 
			
		||||
 | 
			
		||||
@section Where is the documentation about ffv1, msmpeg4, asv1, 4xm?
 | 
			
		||||
 | 
			
		||||
see @url{http://www.ffmpeg.org/~michael/}
 | 
			
		||||
see @url{http://svn.ffmpeg.org/michael/trunk/docs/}
 | 
			
		||||
 | 
			
		||||
@section How do I feed H.263-RTP (and other codecs in RTP) to libavcodec?
 | 
			
		||||
 | 
			
		||||
@@ -531,24 +492,12 @@ Even if peculiar since it is network oriented, RTP is a container like any
 | 
			
		||||
other. You have to @emph{demux} RTP before feeding the payload to libavcodec.
 | 
			
		||||
In this specific case please look at RFC 4629 to see how it should be done.
 | 
			
		||||
 | 
			
		||||
@section AVStream.r_frame_rate is wrong, it is much larger than the frame rate.
 | 
			
		||||
@section AVStream.r_frame_rate is wrong, it is much larger than the framerate.
 | 
			
		||||
 | 
			
		||||
r_frame_rate is NOT the average frame rate, it is the smallest frame rate
 | 
			
		||||
r_frame_rate is NOT the average framerate, it is the smallest framerate
 | 
			
		||||
that can accurately represent all timestamps. So no, it is not
 | 
			
		||||
wrong if it is larger than the average!
 | 
			
		||||
For example, if you have mixed 25 and 30 fps content, then r_frame_rate
 | 
			
		||||
will be 150.
 | 
			
		||||
 | 
			
		||||
@section Why is @code{make fate} not running all tests?
 | 
			
		||||
 | 
			
		||||
Make sure you have the fate-suite samples and the @code{SAMPLES} Make variable
 | 
			
		||||
or @code{FATE_SAMPLES} environment variable or the @code{--samples}
 | 
			
		||||
@command{configure} option is set to the right path.
 | 
			
		||||
 | 
			
		||||
@section Why is @code{make fate} not finding the samples?
 | 
			
		||||
 | 
			
		||||
Do you happen to have a @code{~} character in the samples path to indicate a
 | 
			
		||||
home directory? The value is used in ways where the shell cannot expand it,
 | 
			
		||||
causing FATE to not find files. Just replace @code{~} by the full path.
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
 
 | 
			
		||||
							
								
								
									
										194
									
								
								doc/fate.texi
									
									
									
									
									
								
							
							
						
						
									
										194
									
								
								doc/fate.texi
									
									
									
									
									
								
							@@ -1,194 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle FFmpeg Automated Testing Environment
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{FFmpeg Automated Testing Environment}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@node Top
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Introduction
 | 
			
		||||
 | 
			
		||||
  FATE is an extended regression suite on the client-side and a means
 | 
			
		||||
for results aggregation and presentation on the server-side.
 | 
			
		||||
 | 
			
		||||
  The first part of this document explains how you can use FATE from
 | 
			
		||||
your FFmpeg source directory to test your ffmpeg binary. The second
 | 
			
		||||
part describes how you can run FATE to submit the results to FFmpeg's
 | 
			
		||||
FATE server.
 | 
			
		||||
 | 
			
		||||
  In any way you can have a look at the publicly viewable FATE results
 | 
			
		||||
by visiting this website:
 | 
			
		||||
 | 
			
		||||
  @url{http://fate.ffmpeg.org/}
 | 
			
		||||
 | 
			
		||||
  This is especially recommended for all people contributing source
 | 
			
		||||
code to FFmpeg, as it can be seen if some test on some platform broke
 | 
			
		||||
with there recent contribution. This usually happens on the platforms
 | 
			
		||||
the developers could not test on.
 | 
			
		||||
 | 
			
		||||
  The second part of this document describes how you can run FATE to
 | 
			
		||||
submit your results to FFmpeg's FATE server. If you want to submit your
 | 
			
		||||
results be sure to check that your combination of CPU, OS and compiler
 | 
			
		||||
is not already listed on the above mentioned website.
 | 
			
		||||
 | 
			
		||||
  In the third part you can find a comprehensive listing of FATE makefile
 | 
			
		||||
targets and variables.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@chapter Using FATE from your FFmpeg source directory
 | 
			
		||||
 | 
			
		||||
  If you want to run FATE on your machine you need to have the samples
 | 
			
		||||
in place. You can get the samples via the build target fate-rsync.
 | 
			
		||||
Use this command from the top-level source directory:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
make fate-rsync SAMPLES=fate-suite/
 | 
			
		||||
make fate       SAMPLES=fate-suite/
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
  The above commands set the samples location by passing a makefile
 | 
			
		||||
variable via command line. It is also possible to set the samples
 | 
			
		||||
location at source configuration time by invoking configure with
 | 
			
		||||
`--samples=<path to the samples directory>'. Afterwards you can
 | 
			
		||||
invoke the makefile targets without setting the SAMPLES makefile
 | 
			
		||||
variable. This is illustrated by the following commands:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
./configure --samples=fate-suite/
 | 
			
		||||
make fate-rsync
 | 
			
		||||
make fate
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
  Yet another way to tell FATE about the location of the sample
 | 
			
		||||
directory is by making sure the environment variable FATE_SAMPLES
 | 
			
		||||
contains the path to your samples directory. This can be achieved
 | 
			
		||||
by e.g. putting that variable in your shell profile or by setting
 | 
			
		||||
it in your interactive session.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
FATE_SAMPLES=fate-suite/ make fate
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@float NOTE
 | 
			
		||||
Do not put a '~' character in the samples path to indicate a home
 | 
			
		||||
directory. Because of shell nuances, this will cause FATE to fail.
 | 
			
		||||
@end float
 | 
			
		||||
 | 
			
		||||
To use a custom wrapper to run the test, pass @option{--target-exec} to
 | 
			
		||||
@command{configure} or set the @var{TARGET_EXEC} Make variable.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@chapter Submitting the results to the FFmpeg result aggregation server
 | 
			
		||||
 | 
			
		||||
  To submit your results to the server you should run fate through the
 | 
			
		||||
shell script @file{tests/fate.sh} from the FFmpeg sources. This script needs
 | 
			
		||||
to be invoked with a configuration file as its first argument.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
tests/fate.sh /path/to/fate_config
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
  A configuration file template with comments describing the individual
 | 
			
		||||
configuration variables can be found at @file{doc/fate_config.sh.template}.
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
  The mentioned configuration template is also available here:
 | 
			
		||||
@verbatiminclude fate_config.sh.template
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
  Create a configuration that suits your needs, based on the configuration
 | 
			
		||||
template. The `slot' configuration variable can be any string that is not
 | 
			
		||||
yet used, but it is suggested that you name it adhering to the following
 | 
			
		||||
pattern <arch>-<os>-<compiler>-<compiler version>. The configuration file
 | 
			
		||||
itself will be sourced in a shell script, therefore all shell features may
 | 
			
		||||
be used. This enables you to setup the environment as you need it for your
 | 
			
		||||
build.
 | 
			
		||||
 | 
			
		||||
  For your first test runs the `fate_recv' variable should be empty or
 | 
			
		||||
commented out. This will run everything as normal except that it will omit
 | 
			
		||||
the submission of the results to the server. The following files should be
 | 
			
		||||
present in $workdir as specified in the configuration file:
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
    @item configure.log
 | 
			
		||||
    @item compile.log
 | 
			
		||||
    @item test.log
 | 
			
		||||
    @item report
 | 
			
		||||
    @item version
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
  When you have everything working properly you can create an SSH key pair
 | 
			
		||||
and send the public key to the FATE server administrator who can be contacted
 | 
			
		||||
at the email address @email{fate-admin@@ffmpeg.org}.
 | 
			
		||||
 | 
			
		||||
  Configure your SSH client to use public key authentication with that key
 | 
			
		||||
when connecting to the FATE server. Also do not forget to check the identity
 | 
			
		||||
of the server and to accept its host key. This can usually be achieved by
 | 
			
		||||
running your SSH client manually and killing it after you accepted the key.
 | 
			
		||||
The FATE server's fingerprint is:
 | 
			
		||||
 | 
			
		||||
  b1:31:c8:79:3f:04:1d:f8:f2:23:26:5a:fd:55:fa:92
 | 
			
		||||
 | 
			
		||||
  If you have problems connecting to the FATE server, it may help to try out
 | 
			
		||||
the @command{ssh} command with one or more @option{-v} options. You should
 | 
			
		||||
get detailed output concerning your SSH configuration and the authentication
 | 
			
		||||
process.
 | 
			
		||||
 | 
			
		||||
  The only thing left is to automate the execution of the fate.sh script and
 | 
			
		||||
the synchronisation of the samples directory.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@chapter FATE makefile targets and variables
 | 
			
		||||
 | 
			
		||||
@section Makefile targets
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item fate-rsync
 | 
			
		||||
    Download/synchronize sample files to the configured samples directory.
 | 
			
		||||
 | 
			
		||||
@item fate-list
 | 
			
		||||
    Will list all fate/regression test targets.
 | 
			
		||||
 | 
			
		||||
@item fate
 | 
			
		||||
    Run the FATE test suite (requires the fate-suite dataset).
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section Makefile variables
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item V
 | 
			
		||||
    Verbosity level, can be set to 0, 1 or 2.
 | 
			
		||||
    @itemize
 | 
			
		||||
        @item 0: show just the test arguments
 | 
			
		||||
        @item 1: show just the command used in the test
 | 
			
		||||
        @item 2: show everything
 | 
			
		||||
    @end itemize
 | 
			
		||||
 | 
			
		||||
@item SAMPLES
 | 
			
		||||
    Specify or override the path to the FATE samples at make time, it has a
 | 
			
		||||
    meaning only while running the regression tests.
 | 
			
		||||
 | 
			
		||||
@item THREADS
 | 
			
		||||
    Specify how many threads to use while running regression tests, it is
 | 
			
		||||
    quite useful to detect thread-related regressions.
 | 
			
		||||
@item THREAD_TYPE
 | 
			
		||||
    Specify which threading strategy test, either @var{slice} or @var{frame},
 | 
			
		||||
    by default @var{slice+frame}
 | 
			
		||||
@item CPUFLAGS
 | 
			
		||||
    Specify CPU flags.
 | 
			
		||||
@item TARGET_EXEC
 | 
			
		||||
    Specify or override the wrapper used to run the tests.
 | 
			
		||||
    The @var{TARGET_EXEC} option provides a way to run FATE wrapped in
 | 
			
		||||
    @command{valgrind}, @command{qemu-user} or @command{wine} or on remote targets
 | 
			
		||||
    through @command{ssh}.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section Examples
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
make V=1 SAMPLES=/var/fate/samples THREADS=2 CPUFLAGS=mmx fate
 | 
			
		||||
@end example
 | 
			
		||||
@@ -1,25 +0,0 @@
 | 
			
		||||
slot=                                    # some unique identifier
 | 
			
		||||
repo=git://source.ffmpeg.org/ffmpeg.git  # the source repository
 | 
			
		||||
samples=                                 # path to samples directory
 | 
			
		||||
workdir=                                 # directory in which to do all the work
 | 
			
		||||
#fate_recv="ssh -T fate@fate.ffmpeg.org" # command to submit report
 | 
			
		||||
comment=                                 # optional description
 | 
			
		||||
 | 
			
		||||
# the following are optional and map to configure options
 | 
			
		||||
arch=
 | 
			
		||||
cpu=
 | 
			
		||||
cross_prefix=
 | 
			
		||||
cc=
 | 
			
		||||
target_os=
 | 
			
		||||
sysroot=
 | 
			
		||||
target_exec=
 | 
			
		||||
target_path=
 | 
			
		||||
extra_cflags=
 | 
			
		||||
extra_ldflags=
 | 
			
		||||
extra_libs=
 | 
			
		||||
extra_conf=     # extra configure options not covered above
 | 
			
		||||
 | 
			
		||||
#make=          # name of GNU make if not 'make'
 | 
			
		||||
makeopts=       # extra options passed to 'make'
 | 
			
		||||
#tar=           # command to create a tar archive from its arguments on stdout,
 | 
			
		||||
                # defaults to 'tar c'
 | 
			
		||||
@@ -1,45 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle FFmpeg Bitstream Filters Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{FFmpeg Bitstream Filters Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
This document describes the bitstream filters provided by the
 | 
			
		||||
libavcodec library.
 | 
			
		||||
 | 
			
		||||
A bitstream filter operates on the encoded stream data, and performs
 | 
			
		||||
bitstream level modifications without performing decoding.
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
 | 
			
		||||
@include bitstream_filters.texi
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{libavcodec.html,libavcodec}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), libavcodec(3)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename ffmpeg-bitstream-filters
 | 
			
		||||
@settitle FFmpeg bitstream filters
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
										
											
												File diff suppressed because it is too large
												Load Diff
											
										
									
								
							@@ -1,62 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle FFmpeg Devices Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{FFmpeg Devices Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
This document describes the input and output devices provided by the
 | 
			
		||||
libavdevice library.
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
 | 
			
		||||
@chapter Device Options
 | 
			
		||||
@c man begin DEVICE OPTIONS
 | 
			
		||||
 | 
			
		||||
The libavdevice library provides the same interface as
 | 
			
		||||
libavformat. Namely, an input device is considered like a demuxer, and
 | 
			
		||||
an output device like a muxer, and the interface and generic device
 | 
			
		||||
options are the same provided by libavformat (see the ffmpeg-formats
 | 
			
		||||
manual).
 | 
			
		||||
 | 
			
		||||
In addition each input or output device may support so-called private
 | 
			
		||||
options, which are specific for that component.
 | 
			
		||||
 | 
			
		||||
Options may be set by specifying -@var{option} @var{value} in the
 | 
			
		||||
FFmpeg tools, or by setting the value explicitly in the device
 | 
			
		||||
@code{AVFormatContext} options or using the @file{libavutil/opt.h} API
 | 
			
		||||
for programmatic use.
 | 
			
		||||
 | 
			
		||||
@c man end DEVICE OPTIONS
 | 
			
		||||
 | 
			
		||||
@include indevs.texi
 | 
			
		||||
@include outdevs.texi
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{libavdevice.html,libavdevice}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), libavdevice(3)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename ffmpeg-devices
 | 
			
		||||
@settitle FFmpeg devices
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
							
								
								
									
										956
									
								
								doc/ffmpeg-doc.texi
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										956
									
								
								doc/ffmpeg-doc.texi
									
									
									
									
									
										Normal file
									
								
							@@ -0,0 +1,956 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle FFmpeg Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@sp 7
 | 
			
		||||
@center @titlefont{FFmpeg Documentation}
 | 
			
		||||
@sp 3
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@chapter Introduction
 | 
			
		||||
 | 
			
		||||
FFmpeg is a very fast video and audio converter. It can also grab from
 | 
			
		||||
a live audio/video source.
 | 
			
		||||
 | 
			
		||||
The command line interface is designed to be intuitive, in the sense
 | 
			
		||||
that FFmpeg tries to figure out all parameters that can possibly be
 | 
			
		||||
derived automatically. You usually only have to specify the target
 | 
			
		||||
bitrate you want.
 | 
			
		||||
 | 
			
		||||
FFmpeg can also convert from any sample rate to any other, and resize
 | 
			
		||||
video on the fly with a high quality polyphase filter.
 | 
			
		||||
 | 
			
		||||
@chapter Quick Start
 | 
			
		||||
 | 
			
		||||
@c man begin EXAMPLES
 | 
			
		||||
@section Video and Audio grabbing
 | 
			
		||||
 | 
			
		||||
FFmpeg can grab video and audio from devices given that you specify the input
 | 
			
		||||
format and device.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f oss -i /dev/dsp -f video4linux2 -i /dev/video0 /tmp/out.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Note that you must activate the right video source and channel before
 | 
			
		||||
launching FFmpeg with any TV viewer such as xawtv
 | 
			
		||||
(@url{http://linux.bytesex.org/xawtv/}) by Gerd Knorr. You also
 | 
			
		||||
have to set the audio recording levels correctly with a
 | 
			
		||||
standard mixer.
 | 
			
		||||
 | 
			
		||||
@section X11 grabbing
 | 
			
		||||
 | 
			
		||||
FFmpeg can grab the X11 display.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f x11grab -s cif -i :0.0 /tmp/out.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
0.0 is display.screen number of your X11 server, same as
 | 
			
		||||
the DISPLAY environment variable.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f x11grab -s cif -i :0.0+10,20 /tmp/out.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
0.0 is display.screen number of your X11 server, same as the DISPLAY environment
 | 
			
		||||
variable. 10 is the x-offset and 20 the y-offset for the grabbing.
 | 
			
		||||
 | 
			
		||||
@section Video and Audio file format conversion
 | 
			
		||||
 | 
			
		||||
* FFmpeg can use any supported file format and protocol as input:
 | 
			
		||||
 | 
			
		||||
Examples:
 | 
			
		||||
 | 
			
		||||
* You can use YUV files as input:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i /tmp/test%d.Y /tmp/out.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
It will use the files:
 | 
			
		||||
@example
 | 
			
		||||
/tmp/test0.Y, /tmp/test0.U, /tmp/test0.V,
 | 
			
		||||
/tmp/test1.Y, /tmp/test1.U, /tmp/test1.V, etc...
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
The Y files use twice the resolution of the U and V files. They are
 | 
			
		||||
raw files, without header. They can be generated by all decent video
 | 
			
		||||
decoders. You must specify the size of the image with the @option{-s} option
 | 
			
		||||
if FFmpeg cannot guess it.
 | 
			
		||||
 | 
			
		||||
* You can input from a raw YUV420P file:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i /tmp/test.yuv /tmp/out.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
test.yuv is a file containing raw YUV planar data. Each frame is composed
 | 
			
		||||
of the Y plane followed by the U and V planes at half vertical and
 | 
			
		||||
horizontal resolution.
 | 
			
		||||
 | 
			
		||||
* You can output to a raw YUV420P file:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i mydivx.avi hugefile.yuv
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
* You can set several input files and output files:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i /tmp/a.wav -s 640x480 -i /tmp/a.yuv /tmp/a.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Converts the audio file a.wav and the raw YUV video file a.yuv
 | 
			
		||||
to MPEG file a.mpg.
 | 
			
		||||
 | 
			
		||||
* You can also do audio and video conversions at the same time:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i /tmp/a.wav -ar 22050 /tmp/a.mp2
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Converts a.wav to MPEG audio at 22050 Hz sample rate.
 | 
			
		||||
 | 
			
		||||
* You can encode to several formats at the same time and define a
 | 
			
		||||
mapping from input stream to output streams:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i /tmp/a.wav -ab 64k /tmp/a.mp2 -ab 128k /tmp/b.mp2 -map 0:0 -map 0:0
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Converts a.wav to a.mp2 at 64 kbits and to b.mp2 at 128 kbits. '-map
 | 
			
		||||
file:index' specifies which input stream is used for each output
 | 
			
		||||
stream, in the order of the definition of output streams.
 | 
			
		||||
 | 
			
		||||
* You can transcode decrypted VOBs:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i snatch_1.vob -f avi -vcodec mpeg4 -b 800k -g 300 -bf 2 -acodec libmp3lame -ab 128k snatch.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
This is a typical DVD ripping example; the input is a VOB file, the
 | 
			
		||||
output an AVI file with MPEG-4 video and MP3 audio. Note that in this
 | 
			
		||||
command we use B-frames so the MPEG-4 stream is DivX5 compatible, and
 | 
			
		||||
GOP size is 300 which means one intra frame every 10 seconds for 29.97fps
 | 
			
		||||
input video. Furthermore, the audio stream is MP3-encoded so you need
 | 
			
		||||
to enable LAME support by passing @code{--enable-libmp3lame} to configure.
 | 
			
		||||
The mapping is particularly useful for DVD transcoding
 | 
			
		||||
to get the desired audio language.
 | 
			
		||||
 | 
			
		||||
NOTE: To see the supported input formats, use @code{ffmpeg -formats}.
 | 
			
		||||
 | 
			
		||||
* You can extract images from a video, or create a video from many images:
 | 
			
		||||
 | 
			
		||||
For extracting images from a video:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i foo.avi -r 1 -s WxH -f image2 foo-%03d.jpeg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
This will extract one video frame per second from the video and will
 | 
			
		||||
output them in files named @file{foo-001.jpeg}, @file{foo-002.jpeg},
 | 
			
		||||
etc. Images will be rescaled to fit the new WxH values.
 | 
			
		||||
 | 
			
		||||
If you want to extract just a limited number of frames, you can use the
 | 
			
		||||
above command in combination with the -vframes or -t option, or in
 | 
			
		||||
combination with -ss to start extracting from a certain point in time.
 | 
			
		||||
 | 
			
		||||
For creating a video from many images:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f image2 -i foo-%03d.jpeg -r 12 -s WxH foo.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
The syntax @code{foo-%03d.jpeg} specifies to use a decimal number
 | 
			
		||||
composed of three digits padded with zeroes to express the sequence
 | 
			
		||||
number. It is the same syntax supported by the C printf function, but
 | 
			
		||||
only formats accepting a normal integer are suitable.
 | 
			
		||||
 | 
			
		||||
* You can put many streams of the same type in the output:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i test1.avi -i test2.avi -vcodec copy -acodec copy -vcodec copy -acodec copy test12.avi -newvideo -newaudio
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
In addition to the first video and audio streams, the resulting
 | 
			
		||||
output file @file{test12.avi} will contain the second video
 | 
			
		||||
and the second audio stream found in the input streams list.
 | 
			
		||||
 | 
			
		||||
The @code{-newvideo}, @code{-newaudio} and @code{-newsubtitle}
 | 
			
		||||
options have to be specified immediately after the name of the output
 | 
			
		||||
file to which you want to add them.
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@chapter Invocation
 | 
			
		||||
 | 
			
		||||
@section Syntax
 | 
			
		||||
 | 
			
		||||
The generic syntax is:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
@c man begin SYNOPSIS
 | 
			
		||||
ffmpeg [[infile options][@option{-i} @var{infile}]]... @{[outfile options] @var{outfile}@}...
 | 
			
		||||
@c man end
 | 
			
		||||
@end example
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
As a general rule, options are applied to the next specified
 | 
			
		||||
file. Therefore, order is important, and you can have the same
 | 
			
		||||
option on the command line multiple times. Each occurrence is
 | 
			
		||||
then applied to the next input or output file.
 | 
			
		||||
 | 
			
		||||
* To set the video bitrate of the output file to 64kbit/s:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i input.avi -b 64k output.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
* To force the frame rate of the output file to 24 fps:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i input.avi -r 24 output.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
* To force the frame rate of the input file (valid for raw formats only)
 | 
			
		||||
to 1 fps and the frame rate of the output file to 24 fps:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -r 1 -i input.m2v -r 24 output.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
The format option may be needed for raw input files.
 | 
			
		||||
 | 
			
		||||
By default, FFmpeg tries to convert as losslessly as possible: It
 | 
			
		||||
uses the same audio and video parameters for the outputs as the one
 | 
			
		||||
specified for the inputs.
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@c man begin OPTIONS
 | 
			
		||||
 | 
			
		||||
@include fftools-common-opts.texi
 | 
			
		||||
 | 
			
		||||
@section Main options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item -f @var{fmt}
 | 
			
		||||
Force format.
 | 
			
		||||
 | 
			
		||||
@item -i @var{filename}
 | 
			
		||||
input file name
 | 
			
		||||
 | 
			
		||||
@item -y
 | 
			
		||||
Overwrite output files.
 | 
			
		||||
 | 
			
		||||
@item -t @var{duration}
 | 
			
		||||
Restrict the transcoded/captured video sequence
 | 
			
		||||
to the duration specified in seconds.
 | 
			
		||||
@code{hh:mm:ss[.xxx]} syntax is also supported.
 | 
			
		||||
 | 
			
		||||
@item -fs @var{limit_size}
 | 
			
		||||
Set the file size limit.
 | 
			
		||||
 | 
			
		||||
@item -ss @var{position}
 | 
			
		||||
Seek to given time position in seconds.
 | 
			
		||||
@code{hh:mm:ss[.xxx]} syntax is also supported.
 | 
			
		||||
 | 
			
		||||
@item -itsoffset @var{offset}
 | 
			
		||||
Set the input time offset in seconds.
 | 
			
		||||
@code{[-]hh:mm:ss[.xxx]} syntax is also supported.
 | 
			
		||||
This option affects all the input files that follow it.
 | 
			
		||||
The offset is added to the timestamps of the input files.
 | 
			
		||||
Specifying a positive offset means that the corresponding
 | 
			
		||||
streams are delayed by 'offset' seconds.
 | 
			
		||||
 | 
			
		||||
@item -timestamp @var{time}
 | 
			
		||||
Set the timestamp.
 | 
			
		||||
 | 
			
		||||
@item -metadata @var{key}=@var{value}
 | 
			
		||||
Set a metadata key/value pair.
 | 
			
		||||
 | 
			
		||||
For example, for setting the title in the output file:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i in.avi -metadata title="my title" out.flv
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item -v @var{number}
 | 
			
		||||
Set the logging verbosity level.
 | 
			
		||||
 | 
			
		||||
@item -target @var{type}
 | 
			
		||||
Specify target file type ("vcd", "svcd", "dvd", "dv", "dv50", "pal-vcd",
 | 
			
		||||
"ntsc-svcd", ... ). All the format options (bitrate, codecs,
 | 
			
		||||
buffer sizes) are then set automatically. You can just type:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i myfile.avi -target vcd /tmp/vcd.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Nevertheless you can specify additional options as long as you know
 | 
			
		||||
they do not conflict with the standard, as in:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i myfile.avi -target vcd -bf 2 /tmp/vcd.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item -dframes @var{number}
 | 
			
		||||
Set the number of data frames to record.
 | 
			
		||||
 | 
			
		||||
@item -scodec @var{codec}
 | 
			
		||||
Force subtitle codec ('copy' to copy stream).
 | 
			
		||||
 | 
			
		||||
@item -newsubtitle
 | 
			
		||||
Add a new subtitle stream to the current output stream.
 | 
			
		||||
 | 
			
		||||
@item -slang @var{code}
 | 
			
		||||
Set the ISO 639 language code (3 letters) of the current subtitle stream.
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section Video Options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item -b @var{bitrate}
 | 
			
		||||
Set the video bitrate in bit/s (default = 200 kb/s).
 | 
			
		||||
@item -vframes @var{number}
 | 
			
		||||
Set the number of video frames to record.
 | 
			
		||||
@item -r @var{fps}
 | 
			
		||||
Set frame rate (Hz value, fraction or abbreviation), (default = 25).
 | 
			
		||||
@item -s @var{size}
 | 
			
		||||
Set frame size. The format is @samp{wxh} (ffserver default = 160x128, ffmpeg default = same as source).
 | 
			
		||||
The following abbreviations are recognized:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item sqcif
 | 
			
		||||
128x96
 | 
			
		||||
@item qcif
 | 
			
		||||
176x144
 | 
			
		||||
@item cif
 | 
			
		||||
352x288
 | 
			
		||||
@item 4cif
 | 
			
		||||
704x576
 | 
			
		||||
@item 16cif
 | 
			
		||||
1408x1152
 | 
			
		||||
@item qqvga
 | 
			
		||||
160x120
 | 
			
		||||
@item qvga
 | 
			
		||||
320x240
 | 
			
		||||
@item vga
 | 
			
		||||
640x480
 | 
			
		||||
@item svga
 | 
			
		||||
800x600
 | 
			
		||||
@item xga
 | 
			
		||||
1024x768
 | 
			
		||||
@item uxga
 | 
			
		||||
1600x1200
 | 
			
		||||
@item qxga
 | 
			
		||||
2048x1536
 | 
			
		||||
@item sxga
 | 
			
		||||
1280x1024
 | 
			
		||||
@item qsxga
 | 
			
		||||
2560x2048
 | 
			
		||||
@item hsxga
 | 
			
		||||
5120x4096
 | 
			
		||||
@item wvga
 | 
			
		||||
852x480
 | 
			
		||||
@item wxga
 | 
			
		||||
1366x768
 | 
			
		||||
@item wsxga
 | 
			
		||||
1600x1024
 | 
			
		||||
@item wuxga
 | 
			
		||||
1920x1200
 | 
			
		||||
@item woxga
 | 
			
		||||
2560x1600
 | 
			
		||||
@item wqsxga
 | 
			
		||||
3200x2048
 | 
			
		||||
@item wquxga
 | 
			
		||||
3840x2400
 | 
			
		||||
@item whsxga
 | 
			
		||||
6400x4096
 | 
			
		||||
@item whuxga
 | 
			
		||||
7680x4800
 | 
			
		||||
@item cga
 | 
			
		||||
320x200
 | 
			
		||||
@item ega
 | 
			
		||||
640x350
 | 
			
		||||
@item hd480
 | 
			
		||||
852x480
 | 
			
		||||
@item hd720
 | 
			
		||||
1280x720
 | 
			
		||||
@item hd1080
 | 
			
		||||
1920x1080
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item -aspect @var{aspect}
 | 
			
		||||
Set aspect ratio (4:3, 16:9 or 1.3333, 1.7777).
 | 
			
		||||
@item -croptop @var{size}
 | 
			
		||||
Set top crop band size (in pixels).
 | 
			
		||||
@item -cropbottom @var{size}
 | 
			
		||||
Set bottom crop band size (in pixels).
 | 
			
		||||
@item -cropleft @var{size}
 | 
			
		||||
Set left crop band size (in pixels).
 | 
			
		||||
@item -cropright @var{size}
 | 
			
		||||
Set right crop band size (in pixels).
 | 
			
		||||
@item -padtop @var{size}
 | 
			
		||||
Set top pad band size (in pixels).
 | 
			
		||||
@item -padbottom @var{size}
 | 
			
		||||
Set bottom pad band size (in pixels).
 | 
			
		||||
@item -padleft @var{size}
 | 
			
		||||
Set left pad band size (in pixels).
 | 
			
		||||
@item -padright @var{size}
 | 
			
		||||
Set right pad band size (in pixels).
 | 
			
		||||
@item -padcolor @var{hex_color}
 | 
			
		||||
Set color of padded bands. The value for padcolor is expressed
 | 
			
		||||
as a six digit hexadecimal number where the first two digits
 | 
			
		||||
represent red, the middle two digits green and last two digits
 | 
			
		||||
blue (default = 000000 (black)).
 | 
			
		||||
@item -vn
 | 
			
		||||
Disable video recording.
 | 
			
		||||
@item -bt @var{tolerance}
 | 
			
		||||
Set video bitrate tolerance (in bits, default 4000k).
 | 
			
		||||
Has a minimum value of: (target_bitrate/target_framerate).
 | 
			
		||||
In 1-pass mode, bitrate tolerance specifies how far ratecontrol is
 | 
			
		||||
willing to deviate from the target average bitrate value. This is
 | 
			
		||||
not related to min/max bitrate. Lowering tolerance too much has
 | 
			
		||||
an adverse effect on quality.
 | 
			
		||||
@item -maxrate @var{bitrate}
 | 
			
		||||
Set max video bitrate (in bit/s).
 | 
			
		||||
Requires -bufsize to be set.
 | 
			
		||||
@item -minrate @var{bitrate}
 | 
			
		||||
Set min video bitrate (in bit/s).
 | 
			
		||||
Most useful in setting up a CBR encode:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i myfile.avi -b 4000k -minrate 4000k -maxrate 4000k -bufsize 1835k out.m2v
 | 
			
		||||
@end example
 | 
			
		||||
It is of little use elsewise.
 | 
			
		||||
@item -bufsize @var{size}
 | 
			
		||||
Set video buffer verifier buffer size (in bits).
 | 
			
		||||
@item -vcodec @var{codec}
 | 
			
		||||
Force video codec to @var{codec}. Use the @code{copy} special value to
 | 
			
		||||
tell that the raw codec data must be copied as is.
 | 
			
		||||
@item -sameq
 | 
			
		||||
Use same video quality as source (implies VBR).
 | 
			
		||||
 | 
			
		||||
@item -pass @var{n}
 | 
			
		||||
Select the pass number (1 or 2). It is used to do two-pass
 | 
			
		||||
video encoding. The statistics of the video are recorded in the first
 | 
			
		||||
pass into a log file (see also the option -passlogfile),
 | 
			
		||||
and in the second pass that log file is used to generate the video
 | 
			
		||||
at the exact requested bitrate.
 | 
			
		||||
On pass 1, you may just deactivate audio and set output to null,
 | 
			
		||||
examples for Windows and Unix:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i foo.mov -vcodec libxvid -pass 1 -an -f rawvideo -y NUL
 | 
			
		||||
ffmpeg -i foo.mov -vcodec libxvid -pass 1 -an -f rawvideo -y /dev/null
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item -passlogfile @var{prefix}
 | 
			
		||||
Set two-pass log file name prefix to @var{prefix}, the default file name
 | 
			
		||||
prefix is ``ffmpeg2pass''. The complete file name will be
 | 
			
		||||
@file{PREFIX-N.log}, where N is a number specific to the output
 | 
			
		||||
stream.
 | 
			
		||||
 | 
			
		||||
@item -newvideo
 | 
			
		||||
Add a new video stream to the current output stream.
 | 
			
		||||
 | 
			
		||||
@item -vlang @var{code}
 | 
			
		||||
Set the ISO 639 language code (3 letters) of the current video stream.
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section Advanced Video Options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item -pix_fmt @var{format}
 | 
			
		||||
Set pixel format. Use 'list' as parameter to show all the supported
 | 
			
		||||
pixel formats.
 | 
			
		||||
@item -sws_flags @var{flags}
 | 
			
		||||
Set SwScaler flags.
 | 
			
		||||
@item -g @var{gop_size}
 | 
			
		||||
Set the group of pictures size.
 | 
			
		||||
@item -intra
 | 
			
		||||
Use only intra frames.
 | 
			
		||||
@item -vdt @var{n}
 | 
			
		||||
Discard threshold.
 | 
			
		||||
@item -qscale @var{q}
 | 
			
		||||
Use fixed video quantizer scale (VBR).
 | 
			
		||||
@item -qmin @var{q}
 | 
			
		||||
minimum video quantizer scale (VBR)
 | 
			
		||||
@item -qmax @var{q}
 | 
			
		||||
maximum video quantizer scale (VBR)
 | 
			
		||||
@item -qdiff @var{q}
 | 
			
		||||
maximum difference between the quantizer scales (VBR)
 | 
			
		||||
@item -qblur @var{blur}
 | 
			
		||||
video quantizer scale blur (VBR) (range 0.0 - 1.0)
 | 
			
		||||
@item -qcomp @var{compression}
 | 
			
		||||
video quantizer scale compression (VBR) (default 0.5).
 | 
			
		||||
Constant of ratecontrol equation. Recommended range for default rc_eq: 0.0-1.0
 | 
			
		||||
 | 
			
		||||
@item -lmin @var{lambda}
 | 
			
		||||
minimum video lagrange factor (VBR)
 | 
			
		||||
@item -lmax @var{lambda}
 | 
			
		||||
max video lagrange factor (VBR)
 | 
			
		||||
@item -mblmin @var{lambda}
 | 
			
		||||
minimum macroblock quantizer scale (VBR)
 | 
			
		||||
@item -mblmax @var{lambda}
 | 
			
		||||
maximum macroblock quantizer scale (VBR)
 | 
			
		||||
 | 
			
		||||
These four options (lmin, lmax, mblmin, mblmax) use 'lambda' units,
 | 
			
		||||
but you may use the QP2LAMBDA constant to easily convert from 'q' units:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i src.ext -lmax 21*QP2LAMBDA dst.ext
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item -rc_init_cplx @var{complexity}
 | 
			
		||||
initial complexity for single pass encoding
 | 
			
		||||
@item -b_qfactor @var{factor}
 | 
			
		||||
qp factor between P- and B-frames
 | 
			
		||||
@item -i_qfactor @var{factor}
 | 
			
		||||
qp factor between P- and I-frames
 | 
			
		||||
@item -b_qoffset @var{offset}
 | 
			
		||||
qp offset between P- and B-frames
 | 
			
		||||
@item -i_qoffset @var{offset}
 | 
			
		||||
qp offset between P- and I-frames
 | 
			
		||||
@item -rc_eq @var{equation}
 | 
			
		||||
Set rate control equation (@pxref{FFmpeg formula
 | 
			
		||||
evaluator}) (default = @code{tex^qComp}).
 | 
			
		||||
@item -rc_override @var{override}
 | 
			
		||||
rate control override for specific intervals
 | 
			
		||||
@item -me_method @var{method}
 | 
			
		||||
Set motion estimation method to @var{method}.
 | 
			
		||||
Available methods are (from lowest to best quality):
 | 
			
		||||
@table @samp
 | 
			
		||||
@item zero
 | 
			
		||||
Try just the (0, 0) vector.
 | 
			
		||||
@item phods
 | 
			
		||||
@item log
 | 
			
		||||
@item x1
 | 
			
		||||
@item hex
 | 
			
		||||
@item umh
 | 
			
		||||
@item epzs
 | 
			
		||||
(default method)
 | 
			
		||||
@item full
 | 
			
		||||
exhaustive search (slow and marginally better than epzs)
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item -dct_algo @var{algo}
 | 
			
		||||
Set DCT algorithm to @var{algo}. Available values are:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item 0
 | 
			
		||||
FF_DCT_AUTO (default)
 | 
			
		||||
@item 1
 | 
			
		||||
FF_DCT_FASTINT
 | 
			
		||||
@item 2
 | 
			
		||||
FF_DCT_INT
 | 
			
		||||
@item 3
 | 
			
		||||
FF_DCT_MMX
 | 
			
		||||
@item 4
 | 
			
		||||
FF_DCT_MLIB
 | 
			
		||||
@item 5
 | 
			
		||||
FF_DCT_ALTIVEC
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item -idct_algo @var{algo}
 | 
			
		||||
Set IDCT algorithm to @var{algo}. Available values are:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item 0
 | 
			
		||||
FF_IDCT_AUTO (default)
 | 
			
		||||
@item 1
 | 
			
		||||
FF_IDCT_INT
 | 
			
		||||
@item 2
 | 
			
		||||
FF_IDCT_SIMPLE
 | 
			
		||||
@item 3
 | 
			
		||||
FF_IDCT_SIMPLEMMX
 | 
			
		||||
@item 4
 | 
			
		||||
FF_IDCT_LIBMPEG2MMX
 | 
			
		||||
@item 5
 | 
			
		||||
FF_IDCT_PS2
 | 
			
		||||
@item 6
 | 
			
		||||
FF_IDCT_MLIB
 | 
			
		||||
@item 7
 | 
			
		||||
FF_IDCT_ARM
 | 
			
		||||
@item 8
 | 
			
		||||
FF_IDCT_ALTIVEC
 | 
			
		||||
@item 9
 | 
			
		||||
FF_IDCT_SH4
 | 
			
		||||
@item 10
 | 
			
		||||
FF_IDCT_SIMPLEARM
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item -er @var{n}
 | 
			
		||||
Set error resilience to @var{n}.
 | 
			
		||||
@table @samp
 | 
			
		||||
@item 1
 | 
			
		||||
FF_ER_CAREFUL (default)
 | 
			
		||||
@item 2
 | 
			
		||||
FF_ER_COMPLIANT
 | 
			
		||||
@item 3
 | 
			
		||||
FF_ER_AGGRESSIVE
 | 
			
		||||
@item 4
 | 
			
		||||
FF_ER_VERY_AGGRESSIVE
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item -ec @var{bit_mask}
 | 
			
		||||
Set error concealment to @var{bit_mask}. @var{bit_mask} is a bit mask of
 | 
			
		||||
the following values:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item 1
 | 
			
		||||
FF_EC_GUESS_MVS (default = enabled)
 | 
			
		||||
@item 2
 | 
			
		||||
FF_EC_DEBLOCK (default = enabled)
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item -bf @var{frames}
 | 
			
		||||
Use 'frames' B-frames (supported for MPEG-1, MPEG-2 and MPEG-4).
 | 
			
		||||
@item -mbd @var{mode}
 | 
			
		||||
macroblock decision
 | 
			
		||||
@table @samp
 | 
			
		||||
@item 0
 | 
			
		||||
FF_MB_DECISION_SIMPLE: Use mb_cmp (cannot change it yet in FFmpeg).
 | 
			
		||||
@item 1
 | 
			
		||||
FF_MB_DECISION_BITS: Choose the one which needs the fewest bits.
 | 
			
		||||
@item 2
 | 
			
		||||
FF_MB_DECISION_RD: rate distortion
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item -4mv
 | 
			
		||||
Use four motion vector by macroblock (MPEG-4 only).
 | 
			
		||||
@item -part
 | 
			
		||||
Use data partitioning (MPEG-4 only).
 | 
			
		||||
@item -bug @var{param}
 | 
			
		||||
Work around encoder bugs that are not auto-detected.
 | 
			
		||||
@item -strict @var{strictness}
 | 
			
		||||
How strictly to follow the standards.
 | 
			
		||||
@item -aic
 | 
			
		||||
Enable Advanced intra coding (h263+).
 | 
			
		||||
@item -umv
 | 
			
		||||
Enable Unlimited Motion Vector (h263+)
 | 
			
		||||
 | 
			
		||||
@item -deinterlace
 | 
			
		||||
Deinterlace pictures.
 | 
			
		||||
@item -ilme
 | 
			
		||||
Force interlacing support in encoder (MPEG-2 and MPEG-4 only).
 | 
			
		||||
Use this option if your input file is interlaced and you want
 | 
			
		||||
to keep the interlaced format for minimum losses.
 | 
			
		||||
The alternative is to deinterlace the input stream with
 | 
			
		||||
@option{-deinterlace}, but deinterlacing introduces losses.
 | 
			
		||||
@item -psnr
 | 
			
		||||
Calculate PSNR of compressed frames.
 | 
			
		||||
@item -vstats
 | 
			
		||||
Dump video coding statistics to @file{vstats_HHMMSS.log}.
 | 
			
		||||
@item -vstats_file @var{file}
 | 
			
		||||
Dump video coding statistics to @var{file}.
 | 
			
		||||
@item -top @var{n}
 | 
			
		||||
top=1/bottom=0/auto=-1 field first
 | 
			
		||||
@item -dc @var{precision}
 | 
			
		||||
Intra_dc_precision.
 | 
			
		||||
@item -vtag @var{fourcc/tag}
 | 
			
		||||
Force video tag/fourcc.
 | 
			
		||||
@item -qphist
 | 
			
		||||
Show QP histogram.
 | 
			
		||||
@item -vbsf @var{bitstream_filter}
 | 
			
		||||
Bitstream filters available are "dump_extra", "remove_extra", "noise", "h264_mp4toannexb", "imxdump", "mjpegadump".
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i h264.mp4 -vcodec copy -vbsf h264_mp4toannexb -an out.h264
 | 
			
		||||
@end example
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section Audio Options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item -aframes @var{number}
 | 
			
		||||
Set the number of audio frames to record.
 | 
			
		||||
@item -ar @var{freq}
 | 
			
		||||
Set the audio sampling frequency (default = 44100 Hz).
 | 
			
		||||
@item -ab @var{bitrate}
 | 
			
		||||
Set the audio bitrate in bit/s (default = 64k).
 | 
			
		||||
@item -aq @var{q}
 | 
			
		||||
Set the audio quality (codec-specific, VBR).
 | 
			
		||||
@item -ac @var{channels}
 | 
			
		||||
Set the number of audio channels (default = 1).
 | 
			
		||||
@item -an
 | 
			
		||||
Disable audio recording.
 | 
			
		||||
@item -acodec @var{codec}
 | 
			
		||||
Force audio codec to @var{codec}. Use the @code{copy} special value to
 | 
			
		||||
specify that the raw codec data must be copied as is.
 | 
			
		||||
@item -newaudio
 | 
			
		||||
Add a new audio track to the output file. If you want to specify parameters,
 | 
			
		||||
do so before @code{-newaudio} (@code{-acodec}, @code{-ab}, etc..).
 | 
			
		||||
 | 
			
		||||
Mapping will be done automatically, if the number of output streams is equal to
 | 
			
		||||
the number of input streams, else it will pick the first one that matches. You
 | 
			
		||||
can override the mapping using @code{-map} as usual.
 | 
			
		||||
 | 
			
		||||
Example:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i file.mpg -vcodec copy -acodec ac3 -ab 384k test.mpg -acodec mp2 -ab 192k -newaudio
 | 
			
		||||
@end example
 | 
			
		||||
@item -alang @var{code}
 | 
			
		||||
Set the ISO 639 language code (3 letters) of the current audio stream.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section Advanced Audio options:
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item -atag @var{fourcc/tag}
 | 
			
		||||
Force audio tag/fourcc.
 | 
			
		||||
@item -absf @var{bitstream_filter}
 | 
			
		||||
Bitstream filters available are "dump_extra", "remove_extra", "noise", "mp3comp", "mp3decomp".
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section Subtitle options:
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item -scodec @var{codec}
 | 
			
		||||
Force subtitle codec ('copy' to copy stream).
 | 
			
		||||
@item -newsubtitle
 | 
			
		||||
Add a new subtitle stream to the current output stream.
 | 
			
		||||
@item -slang @var{code}
 | 
			
		||||
Set the ISO 639 language code (3 letters) of the current subtitle stream.
 | 
			
		||||
@item -sn
 | 
			
		||||
Disable subtitle recording.
 | 
			
		||||
@item -sbsf @var{bitstream_filter}
 | 
			
		||||
Bitstream filters available are "mov2textsub", "text2movsub".
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i file.mov -an -vn -sbsf mov2textsub -scodec copy -f rawvideo sub.txt
 | 
			
		||||
@end example
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section Audio/Video grab options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item -vc @var{channel}
 | 
			
		||||
Set video grab channel (DV1394 only).
 | 
			
		||||
@item -tvstd @var{standard}
 | 
			
		||||
Set television standard (NTSC, PAL (SECAM)).
 | 
			
		||||
@item -isync
 | 
			
		||||
Synchronize read on input.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section Advanced options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item -map @var{input_stream_id}[:@var{sync_stream_id}]
 | 
			
		||||
Set stream mapping from input streams to output streams.
 | 
			
		||||
Just enumerate the input streams in the order you want them in the output.
 | 
			
		||||
@var{sync_stream_id} if specified sets the input stream to sync
 | 
			
		||||
against.
 | 
			
		||||
@item -map_meta_data @var{outfile}:@var{infile}
 | 
			
		||||
Set meta data information of @var{outfile} from @var{infile}.
 | 
			
		||||
@item -debug
 | 
			
		||||
Print specific debug info.
 | 
			
		||||
@item -benchmark
 | 
			
		||||
Show benchmarking information at the end of an encode.
 | 
			
		||||
Shows CPU time used and maximum memory consumption.
 | 
			
		||||
Maximum memory consumption is not supported on all systems,
 | 
			
		||||
it will usually display as 0 if not supported.
 | 
			
		||||
@item -dump
 | 
			
		||||
Dump each input packet.
 | 
			
		||||
@item -hex
 | 
			
		||||
When dumping packets, also dump the payload.
 | 
			
		||||
@item -bitexact
 | 
			
		||||
Only use bit exact algorithms (for codec testing).
 | 
			
		||||
@item -ps @var{size}
 | 
			
		||||
Set RTP payload size in bytes.
 | 
			
		||||
@item -re
 | 
			
		||||
Read input at native frame rate. Mainly used to simulate a grab device.
 | 
			
		||||
@item -loop_input
 | 
			
		||||
Loop over the input stream. Currently it works only for image
 | 
			
		||||
streams. This option is used for automatic FFserver testing.
 | 
			
		||||
@item -loop_output @var{number_of_times}
 | 
			
		||||
Repeatedly loop output for formats that support looping such as animated GIF
 | 
			
		||||
(0 will loop the output infinitely).
 | 
			
		||||
@item -threads @var{count}
 | 
			
		||||
Thread count.
 | 
			
		||||
@item -vsync @var{parameter}
 | 
			
		||||
Video sync method.
 | 
			
		||||
0   Each frame is passed with its timestamp from the demuxer to the muxer
 | 
			
		||||
1   Frames will be duplicated and dropped to achieve exactly the requested
 | 
			
		||||
    constant framerate.
 | 
			
		||||
2   Frames are passed through with their timestamp or dropped so as to prevent
 | 
			
		||||
    2 frames from having the same timestamp
 | 
			
		||||
-1  Chooses between 1 and 2 depending on muxer capabilities. This is the default method.
 | 
			
		||||
 | 
			
		||||
With -map you can select from
 | 
			
		||||
which stream the timestamps should be taken. You can leave either video or
 | 
			
		||||
audio unchanged and sync the remaining stream(s) to the unchanged one.
 | 
			
		||||
@item -async @var{samples_per_second}
 | 
			
		||||
Audio sync method. "Stretches/squeezes" the audio stream to match the timestamps,
 | 
			
		||||
the parameter is the maximum samples per second by which the audio is changed.
 | 
			
		||||
-async 1 is a special case where only the start of the audio stream is corrected
 | 
			
		||||
without any later correction.
 | 
			
		||||
@item -copyts
 | 
			
		||||
Copy timestamps from input to output.
 | 
			
		||||
@item -shortest
 | 
			
		||||
Finish encoding when the shortest input stream ends.
 | 
			
		||||
@item -dts_delta_threshold
 | 
			
		||||
Timestamp discontinuity delta threshold.
 | 
			
		||||
@item -muxdelay @var{seconds}
 | 
			
		||||
Set the maximum demux-decode delay.
 | 
			
		||||
@item -muxpreload @var{seconds}
 | 
			
		||||
Set the initial demux-decode delay.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section Preset files
 | 
			
		||||
 | 
			
		||||
A preset file contains a sequence of @var{option}=@var{value} pairs,
 | 
			
		||||
one for each line, specifying a sequence of options which would be
 | 
			
		||||
awkward to specify on the command line. Lines starting with the hash
 | 
			
		||||
('#') character are ignored and are used to provide comments. Check
 | 
			
		||||
the @file{ffpresets} directory in the FFmpeg source tree for examples.
 | 
			
		||||
 | 
			
		||||
Preset files are specified with the @code{vpre}, @code{apre},
 | 
			
		||||
@code{spre}, and @code{fpre} options. The @code{fpre} option takes the
 | 
			
		||||
filename of the preset instead of a preset name as input and can be
 | 
			
		||||
used for any kind of codec. For the @code{vpre}, @code{apre}, and
 | 
			
		||||
@code{spre} options, the options specified in a preset file are
 | 
			
		||||
applied to the currently selected codec of the same type as the preset
 | 
			
		||||
option.
 | 
			
		||||
 | 
			
		||||
The argument passed to the @code{vpre}, @code{apre}, and @code{spre}
 | 
			
		||||
preset options identifies the preset file to use according to the
 | 
			
		||||
following rules:
 | 
			
		||||
 | 
			
		||||
First ffmpeg searches for a file named @var{arg}.ffpreset in the
 | 
			
		||||
directories @file{$FFMPEG_DATADIR} (if set), and @file{$HOME/.ffmpeg}, and in
 | 
			
		||||
the datadir defined at configuration time (usually @file{PREFIX/share/ffmpeg})
 | 
			
		||||
in that order. For example, if the argument is @code{libx264-max}, it will
 | 
			
		||||
search for the file @file{libx264-max.ffpreset}.
 | 
			
		||||
 | 
			
		||||
If no such file is found, then ffmpeg will search for a file named
 | 
			
		||||
@var{codec_name}-@var{arg}.ffpreset in the above-mentioned
 | 
			
		||||
directories, where @var{codec_name} is the name of the codec to which
 | 
			
		||||
the preset file options will be applied. For example, if you select
 | 
			
		||||
the video codec with @code{-vcodec libx264} and use @code{-vpre max},
 | 
			
		||||
then it will search for the file @file{libx264-max.ffpreset}.
 | 
			
		||||
 | 
			
		||||
@anchor{FFmpeg formula evaluator}
 | 
			
		||||
@section FFmpeg formula evaluator
 | 
			
		||||
 | 
			
		||||
When evaluating a rate control string, FFmpeg uses an internal formula
 | 
			
		||||
evaluator.
 | 
			
		||||
 | 
			
		||||
The following binary operators are available: @code{+}, @code{-},
 | 
			
		||||
@code{*}, @code{/}, @code{^}.
 | 
			
		||||
 | 
			
		||||
The following unary operators are available: @code{+}, @code{-},
 | 
			
		||||
@code{(...)}.
 | 
			
		||||
 | 
			
		||||
The following statements are available: @code{ld}, @code{st},
 | 
			
		||||
@code{while}.
 | 
			
		||||
 | 
			
		||||
The following functions are available:
 | 
			
		||||
@table @var
 | 
			
		||||
@item sinh(x)
 | 
			
		||||
@item cosh(x)
 | 
			
		||||
@item tanh(x)
 | 
			
		||||
@item sin(x)
 | 
			
		||||
@item cos(x)
 | 
			
		||||
@item tan(x)
 | 
			
		||||
@item atan(x)
 | 
			
		||||
@item asin(x)
 | 
			
		||||
@item acos(x)
 | 
			
		||||
@item exp(x)
 | 
			
		||||
@item log(x)
 | 
			
		||||
@item abs(x)
 | 
			
		||||
@item squish(x)
 | 
			
		||||
@item gauss(x)
 | 
			
		||||
@item mod(x, y)
 | 
			
		||||
@item max(x, y)
 | 
			
		||||
@item min(x, y)
 | 
			
		||||
@item eq(x, y)
 | 
			
		||||
@item gte(x, y)
 | 
			
		||||
@item gt(x, y)
 | 
			
		||||
@item lte(x, y)
 | 
			
		||||
@item lt(x, y)
 | 
			
		||||
@item bits2qp(bits)
 | 
			
		||||
@item qp2bits(qp)
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
The following constants are available:
 | 
			
		||||
@table @var
 | 
			
		||||
@item PI
 | 
			
		||||
@item E
 | 
			
		||||
@item iTex
 | 
			
		||||
@item pTex
 | 
			
		||||
@item tex
 | 
			
		||||
@item mv
 | 
			
		||||
@item fCode
 | 
			
		||||
@item iCount
 | 
			
		||||
@item mcVar
 | 
			
		||||
@item var
 | 
			
		||||
@item isI
 | 
			
		||||
@item isP
 | 
			
		||||
@item isB
 | 
			
		||||
@item avgQP
 | 
			
		||||
@item qComp
 | 
			
		||||
@item avgIITex
 | 
			
		||||
@item avgPITex
 | 
			
		||||
@item avgPPTex
 | 
			
		||||
@item avgBPTex
 | 
			
		||||
@item avgTex
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename ffmpeg
 | 
			
		||||
@settitle FFmpeg video converter
 | 
			
		||||
 | 
			
		||||
@c man begin SEEALSO
 | 
			
		||||
ffserver(1), ffplay(1) and the HTML documentation of @file{ffmpeg}.
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@c man begin AUTHOR
 | 
			
		||||
Fabrice Bellard
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@section Protocols
 | 
			
		||||
 | 
			
		||||
The file name can be @file{-} to read from standard input or to write
 | 
			
		||||
to standard output.
 | 
			
		||||
 | 
			
		||||
FFmpeg also handles many protocols specified with an URL syntax.
 | 
			
		||||
 | 
			
		||||
Use 'ffmpeg -protocols' to see a list of the supported protocols.
 | 
			
		||||
 | 
			
		||||
The protocol @code{http:} is currently used only to communicate with
 | 
			
		||||
FFserver (see the FFserver documentation). When FFmpeg will be a
 | 
			
		||||
video player it will also be used for streaming :-)
 | 
			
		||||
 | 
			
		||||
@chapter Tips
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
@item For streaming at very low bitrate application, use a low frame rate
 | 
			
		||||
and a small GOP size. This is especially true for RealVideo where
 | 
			
		||||
the Linux player does not seem to be very fast, so it can miss
 | 
			
		||||
frames. An example is:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -g 3 -r 3 -t 10 -b 50k -s qcif -f rv10 /tmp/b.rm
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item  The parameter 'q' which is displayed while encoding is the current
 | 
			
		||||
quantizer. The value 1 indicates that a very good quality could
 | 
			
		||||
be achieved. The value 31 indicates the worst quality. If q=31 appears
 | 
			
		||||
too often, it means that the encoder cannot compress enough to meet
 | 
			
		||||
your bitrate. You must either increase the bitrate, decrease the
 | 
			
		||||
frame rate or decrease the frame size.
 | 
			
		||||
 | 
			
		||||
@item If your computer is not fast enough, you can speed up the
 | 
			
		||||
compression at the expense of the compression ratio. You can use
 | 
			
		||||
'-me zero' to speed up motion estimation, and '-intra' to disable
 | 
			
		||||
motion estimation completely (you have only I-frames, which means it
 | 
			
		||||
is about as good as JPEG compression).
 | 
			
		||||
 | 
			
		||||
@item To have very low audio bitrates, reduce the sampling frequency
 | 
			
		||||
(down to 22050 Hz for MPEG audio, 22050 or 11025 for AC-3).
 | 
			
		||||
 | 
			
		||||
@item To have a constant quality (but a variable bitrate), use the option
 | 
			
		||||
'-qscale n' when 'n' is between 1 (excellent quality) and 31 (worst
 | 
			
		||||
quality).
 | 
			
		||||
 | 
			
		||||
@item When converting video files, you can use the '-sameq' option which
 | 
			
		||||
uses the same quality factor in the encoder as in the decoder.
 | 
			
		||||
It allows almost lossless encoding.
 | 
			
		||||
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
@@ -1,42 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle FFmpeg Filters Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{FFmpeg Filters Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
This document describes filters, sources, and sinks provided by the
 | 
			
		||||
libavfilter library.
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
 | 
			
		||||
@include filters.texi
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{libavfilter.html,libavfilter}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), libavfilter(3)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename ffmpeg-filters
 | 
			
		||||
@settitle FFmpeg filters
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
@@ -1,177 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle FFmpeg Formats Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{FFmpeg Formats Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
This document describes the supported formats (muxers and demuxers)
 | 
			
		||||
provided by the libavformat library.
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
 | 
			
		||||
@chapter Format Options
 | 
			
		||||
@c man begin FORMAT OPTIONS
 | 
			
		||||
 | 
			
		||||
The libavformat library provides some generic global options, which
 | 
			
		||||
can be set on all the muxers and demuxers. In addition each muxer or
 | 
			
		||||
demuxer may support so-called private options, which are specific for
 | 
			
		||||
that component.
 | 
			
		||||
 | 
			
		||||
Options may be set by specifying -@var{option} @var{value} in the
 | 
			
		||||
FFmpeg tools, or by setting the value explicitly in the
 | 
			
		||||
@code{AVFormatContext} options or using the @file{libavutil/opt.h} API
 | 
			
		||||
for programmatic use.
 | 
			
		||||
 | 
			
		||||
The list of supported options follows:
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item avioflags @var{flags} (@emph{input/output})
 | 
			
		||||
Possible values:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item direct
 | 
			
		||||
Reduce buffering.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item probesize @var{integer} (@emph{input})
 | 
			
		||||
Set probing size in bytes, i.e. the size of the data to analyze to get
 | 
			
		||||
stream information. A higher value will allow to detect more
 | 
			
		||||
information in case it is dispersed into the stream, but will increase
 | 
			
		||||
latency. Must be an integer not lesser than 32. It is 5000000 by default.
 | 
			
		||||
 | 
			
		||||
@item packetsize @var{integer} (@emph{output})
 | 
			
		||||
Set packet size.
 | 
			
		||||
 | 
			
		||||
@item fflags @var{flags} (@emph{input/output})
 | 
			
		||||
Set format flags.
 | 
			
		||||
 | 
			
		||||
Possible values:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item ignidx
 | 
			
		||||
Ignore index.
 | 
			
		||||
@item genpts
 | 
			
		||||
Generate PTS.
 | 
			
		||||
@item nofillin
 | 
			
		||||
Do not fill in missing values that can be exactly calculated.
 | 
			
		||||
@item noparse
 | 
			
		||||
Disable AVParsers, this needs @code{+nofillin} too.
 | 
			
		||||
@item igndts
 | 
			
		||||
Ignore DTS.
 | 
			
		||||
@item discardcorrupt
 | 
			
		||||
Discard corrupted frames.
 | 
			
		||||
@item sortdts
 | 
			
		||||
Try to interleave output packets by DTS.
 | 
			
		||||
@item keepside
 | 
			
		||||
Do not merge side data.
 | 
			
		||||
@item latm
 | 
			
		||||
Enable RTP MP4A-LATM payload.
 | 
			
		||||
@item nobuffer
 | 
			
		||||
Reduce the latency introduced by optional buffering
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item analyzeduration @var{integer} (@emph{input})
 | 
			
		||||
Specify how many microseconds are analyzed to estimate duration.
 | 
			
		||||
 | 
			
		||||
@item cryptokey @var{hexadecimal string} (@emph{input})
 | 
			
		||||
Set decryption key.
 | 
			
		||||
 | 
			
		||||
@item indexmem @var{integer} (@emph{input})
 | 
			
		||||
Set max memory used for timestamp index (per stream).
 | 
			
		||||
 | 
			
		||||
@item rtbufsize @var{integer} (@emph{input})
 | 
			
		||||
Set max memory used for buffering real-time frames.
 | 
			
		||||
 | 
			
		||||
@item fdebug @var{flags} (@emph{input/output})
 | 
			
		||||
Print specific debug info.
 | 
			
		||||
 | 
			
		||||
Possible values:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item ts
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item max_delay @var{integer} (@emph{input/output})
 | 
			
		||||
Set maximum muxing or demuxing delay in microseconds.
 | 
			
		||||
 | 
			
		||||
@item fpsprobesize @var{integer} (@emph{input})
 | 
			
		||||
Set number of frames used to probe fps.
 | 
			
		||||
 | 
			
		||||
@item audio_preload @var{integer} (@emph{output})
 | 
			
		||||
Set microseconds by which audio packets should be interleaved earlier.
 | 
			
		||||
 | 
			
		||||
@item chunk_duration @var{integer} (@emph{output})
 | 
			
		||||
Set microseconds for each chunk.
 | 
			
		||||
 | 
			
		||||
@item chunk_size @var{integer} (@emph{output})
 | 
			
		||||
Set size in bytes for each chunk.
 | 
			
		||||
 | 
			
		||||
@item err_detect, f_err_detect @var{flags} (@emph{input})
 | 
			
		||||
Set error detection flags. @code{f_err_detect} is deprecated and
 | 
			
		||||
should be used only via the @command{ffmpeg} tool.
 | 
			
		||||
 | 
			
		||||
Possible values:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item crccheck
 | 
			
		||||
Verify embedded CRCs.
 | 
			
		||||
@item bitstream
 | 
			
		||||
Detect bitstream specification deviations.
 | 
			
		||||
@item buffer
 | 
			
		||||
Detect improper bitstream length.
 | 
			
		||||
@item explode
 | 
			
		||||
Abort decoding on minor error detection.
 | 
			
		||||
@item careful
 | 
			
		||||
Consider things that violate the spec and have not been seen in the
 | 
			
		||||
wild as errors.
 | 
			
		||||
@item compliant
 | 
			
		||||
Consider all spec non compliancies as errors.
 | 
			
		||||
@item aggressive
 | 
			
		||||
Consider things that a sane encoder should not do as an error.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item use_wallclock_as_timestamps @var{integer} (@emph{input})
 | 
			
		||||
Use wallclock as timestamps.
 | 
			
		||||
 | 
			
		||||
@item avoid_negative_ts @var{integer} (@emph{output})
 | 
			
		||||
Shift timestamps to make them positive. 1 enables, 0 disables, default
 | 
			
		||||
of -1 enables when required by target format.
 | 
			
		||||
 | 
			
		||||
@item skip_initial_bytes @var{integer} (@emph{input})
 | 
			
		||||
Set number initial bytes to skip. Default is 0.
 | 
			
		||||
 | 
			
		||||
@item correct_ts_overflow @var{integer} (@emph{input})
 | 
			
		||||
Correct single timestamp overflows if set to 1. Default is 1.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@c man end FORMAT OPTIONS
 | 
			
		||||
 | 
			
		||||
@include demuxers.texi
 | 
			
		||||
@include muxers.texi
 | 
			
		||||
@include metadata.texi
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{libavformat.html,libavformat}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), libavformat(3)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename ffmpeg-formats
 | 
			
		||||
@settitle FFmpeg formats
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
@@ -1,42 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle FFmpeg Protocols Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{FFmpeg Protocols Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
This document describes the input and output protocols provided by the
 | 
			
		||||
libavformat library.
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
 | 
			
		||||
@include protocols.texi
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{libavformat.html,libavformat}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), libavformat(3)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename ffmpeg-protocols
 | 
			
		||||
@settitle FFmpeg protocols
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
@@ -1,238 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle FFmpeg Resampler Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{FFmpeg Resampler Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
The FFmpeg resampler provides an high-level interface to the
 | 
			
		||||
libswresample library audio resampling utilities. In particular it
 | 
			
		||||
allows to perform audio resampling, audio channel layout rematrixing,
 | 
			
		||||
and convert audio format and packing layout.
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
 | 
			
		||||
@chapter Resampler Options
 | 
			
		||||
@c man begin RESAMPLER OPTIONS
 | 
			
		||||
 | 
			
		||||
The audio resampler supports the following named options.
 | 
			
		||||
 | 
			
		||||
Options may be set by specifying -@var{option} @var{value} in the
 | 
			
		||||
FFmpeg tools, @var{option}=@var{value} for the aresample filter,
 | 
			
		||||
by setting the value explicitly in the
 | 
			
		||||
@code{SwrContext} options or using the @file{libavutil/opt.h} API for
 | 
			
		||||
programmatic use.
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item ich, in_channel_count
 | 
			
		||||
Set the number of input channels. Default value is 0. Setting this
 | 
			
		||||
value is not mandatory if the corresponding channel layout
 | 
			
		||||
@option{in_channel_layout} is set.
 | 
			
		||||
 | 
			
		||||
@item och, out_channel_count
 | 
			
		||||
Set the number of output channels. Default value is 0. Setting this
 | 
			
		||||
value is not mandatory if the corresponding channel layout
 | 
			
		||||
@option{out_channel_layout} is set.
 | 
			
		||||
 | 
			
		||||
@item uch, used_channel_count
 | 
			
		||||
Set the number of used channels. Default value is 0. This option is
 | 
			
		||||
only used for special remapping.
 | 
			
		||||
 | 
			
		||||
@item isr, in_sample_rate
 | 
			
		||||
Set the input sample rate. Default value is 0.
 | 
			
		||||
 | 
			
		||||
@item osr, out_sample_rate
 | 
			
		||||
Set the output sample rate. Default value is 0.
 | 
			
		||||
 | 
			
		||||
@item isf, in_sample_fmt
 | 
			
		||||
Specify the input sample format. It is set by default to @code{none}.
 | 
			
		||||
 | 
			
		||||
@item osf, out_sample_fmt
 | 
			
		||||
Specify the output sample format. It is set by default to @code{none}.
 | 
			
		||||
 | 
			
		||||
@item tsf, internal_sample_fmt
 | 
			
		||||
Set the internal sample format. Default value is @code{none}.
 | 
			
		||||
 | 
			
		||||
@item icl, in_channel_layout
 | 
			
		||||
Set the input channel layout.
 | 
			
		||||
 | 
			
		||||
@item ocl, out_channel_layout
 | 
			
		||||
Set the output channel layout.
 | 
			
		||||
 | 
			
		||||
@item clev, center_mix_level
 | 
			
		||||
Set center mix level. It is a value expressed in deciBel, and must be
 | 
			
		||||
inclusively included between -32 and +32.
 | 
			
		||||
 | 
			
		||||
@item slev, surround_mix_level
 | 
			
		||||
Set surround mix level. It is a value expressed in deciBel, and must
 | 
			
		||||
be inclusively included between -32 and +32.
 | 
			
		||||
 | 
			
		||||
@item lfe_mix_evel
 | 
			
		||||
Set LFE mix level.
 | 
			
		||||
 | 
			
		||||
@item rmvol, rematrix_volume
 | 
			
		||||
Set rematrix volume. Default value is 1.0.
 | 
			
		||||
 | 
			
		||||
@item flags, swr_flags
 | 
			
		||||
Set flags used by the converter. Default value is 0.
 | 
			
		||||
 | 
			
		||||
It supports the following individual flags:
 | 
			
		||||
@table @option
 | 
			
		||||
@item res
 | 
			
		||||
force resampling
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item dither_scale
 | 
			
		||||
Set the dither scale. Default value is 1.
 | 
			
		||||
 | 
			
		||||
@item dither_method
 | 
			
		||||
Set dither method. Default value is 0.
 | 
			
		||||
 | 
			
		||||
Supported values:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item rectangular
 | 
			
		||||
select rectangular dither
 | 
			
		||||
@item triangular
 | 
			
		||||
select triangular dither
 | 
			
		||||
@item triangular_hp
 | 
			
		||||
select triangular dither with high pass
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item resampler
 | 
			
		||||
Set resampling engine. Default value is swr.
 | 
			
		||||
 | 
			
		||||
Supported values:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item swr
 | 
			
		||||
select the native SW Resampler; filter options precision and cheby are not
 | 
			
		||||
applicable in this case.
 | 
			
		||||
@item soxr
 | 
			
		||||
select the SoX Resampler (where available); compensation, and filter options
 | 
			
		||||
filter_size, phase_shift, filter_type & kaiser_beta, are not applicable in this
 | 
			
		||||
case.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item filter_size
 | 
			
		||||
For swr only, set resampling filter size, default value is 32.
 | 
			
		||||
 | 
			
		||||
@item phase_shift
 | 
			
		||||
For swr only, set resampling phase shift, default value is 10, must be included
 | 
			
		||||
between 0 and 30.
 | 
			
		||||
 | 
			
		||||
@item linear_interp
 | 
			
		||||
Use Linear Interpolation if set to 1, default value is 0.
 | 
			
		||||
 | 
			
		||||
@item cutoff
 | 
			
		||||
Set cutoff frequency (swr: 6dB point; soxr: 0dB point) ratio; must be a float
 | 
			
		||||
value between 0 and 1.  Default value is 0.97 with swr, and 0.91 with soxr
 | 
			
		||||
(which, with a sample-rate of 44100, preserves the entire audio band to 20kHz).
 | 
			
		||||
 | 
			
		||||
@item precision
 | 
			
		||||
For soxr only, the precision in bits to which the resampled signal will be
 | 
			
		||||
calculated.  The default value of 20 (which, with suitable dithering, is
 | 
			
		||||
appropriate for a destination bit-depth of 16) gives SoX's 'High Quality'; a
 | 
			
		||||
value of 28 gives SoX's 'Very High Quality'.
 | 
			
		||||
 | 
			
		||||
@item cheby
 | 
			
		||||
For soxr only, selects passband rolloff none (Chebyshev) & higher-precision
 | 
			
		||||
approximation for 'irrational' ratios. Default value is 0.
 | 
			
		||||
 | 
			
		||||
@item async
 | 
			
		||||
For swr only, simple 1 parameter audio sync to timestamps using stretching,
 | 
			
		||||
squeezing, filling and trimming. Setting this to 1 will enable filling and
 | 
			
		||||
trimming, larger values represent the maximum amount in samples that the data
 | 
			
		||||
may be stretched or squeezed for each second.
 | 
			
		||||
Default value is 0, thus no compensation is applied to make the samples match
 | 
			
		||||
the audio timestamps.
 | 
			
		||||
 | 
			
		||||
@item min_comp
 | 
			
		||||
For swr only, set the minimum difference between timestamps and audio data (in
 | 
			
		||||
seconds) to trigger stretching/squeezing/filling or trimming of the
 | 
			
		||||
data to make it match the timestamps. The default is that
 | 
			
		||||
stretching/squeezing/filling and trimming is disabled
 | 
			
		||||
(@option{min_comp} = @code{FLT_MAX}).
 | 
			
		||||
 | 
			
		||||
@item min_hard_comp
 | 
			
		||||
For swr only, set the minimum difference between timestamps and audio data (in
 | 
			
		||||
seconds) to trigger adding/dropping samples to make it match the
 | 
			
		||||
timestamps.  This option effectively is a threshold to select between
 | 
			
		||||
hard (trim/fill) and soft (squeeze/stretch) compensation. Note that
 | 
			
		||||
all compensation is by default disabled through @option{min_comp}.
 | 
			
		||||
The default is 0.1.
 | 
			
		||||
 | 
			
		||||
@item comp_duration
 | 
			
		||||
For swr only, set duration (in seconds) over which data is stretched/squeezed
 | 
			
		||||
to make it match the timestamps. Must be a non-negative double float value,
 | 
			
		||||
default value is 1.0.
 | 
			
		||||
 | 
			
		||||
@item max_soft_comp
 | 
			
		||||
For swr only, set maximum factor by which data is stretched/squeezed to make it
 | 
			
		||||
match the timestamps. Must be a non-negative double float value, default value
 | 
			
		||||
is 0.
 | 
			
		||||
 | 
			
		||||
@item matrix_encoding
 | 
			
		||||
Select matrixed stereo encoding.
 | 
			
		||||
 | 
			
		||||
It accepts the following values:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item none
 | 
			
		||||
select none
 | 
			
		||||
@item dolby
 | 
			
		||||
select Dolby
 | 
			
		||||
@item dplii
 | 
			
		||||
select Dolby Pro Logic II
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
Default value is @code{none}.
 | 
			
		||||
 | 
			
		||||
@item filter_type
 | 
			
		||||
For swr only, select resampling filter type. This only affects resampling
 | 
			
		||||
operations.
 | 
			
		||||
 | 
			
		||||
It accepts the following values:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item cubic
 | 
			
		||||
select cubic
 | 
			
		||||
@item blackman_nuttall
 | 
			
		||||
select Blackman Nuttall Windowed Sinc
 | 
			
		||||
@item kaiser
 | 
			
		||||
select Kaiser Windowed Sinc
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item kaiser_beta
 | 
			
		||||
For swr only, set Kaiser Window Beta value. Must be an integer included between
 | 
			
		||||
2 and 16, default value is 9.
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@c man end RESAMPLER OPTIONS
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{libswresample.html,libswresample}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), libswresample(3)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename ffmpeg-resampler
 | 
			
		||||
@settitle FFmpeg Resampler
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
@@ -1,141 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle FFmpeg Scaler Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{FFmpeg Scaler Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
The FFmpeg rescaler provides an high-level interface to the libswscale
 | 
			
		||||
library image conversion utilities. In particular it allows to perform
 | 
			
		||||
image rescaling and pixel format conversion.
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
 | 
			
		||||
@chapter Scaler Options
 | 
			
		||||
@c man begin SCALER OPTIONS
 | 
			
		||||
 | 
			
		||||
The video scaler supports the following named options.
 | 
			
		||||
 | 
			
		||||
Options may be set by specifying -@var{option} @var{value} in the
 | 
			
		||||
FFmpeg tools. For programmatic use, they can be set explicitly in the
 | 
			
		||||
@code{SwsContext} options or through the @file{libavutil/opt.h} API.
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item sws_flags
 | 
			
		||||
Set the scaler flags. This is also used to set the scaling
 | 
			
		||||
algorithm. Only a single algorithm should be selected.
 | 
			
		||||
 | 
			
		||||
It accepts the following values:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item fast_bilinear
 | 
			
		||||
Select fast bilinear scaling algorithm.
 | 
			
		||||
 | 
			
		||||
@item bilinear
 | 
			
		||||
Select bilinear scaling algorithm.
 | 
			
		||||
 | 
			
		||||
@item bicubic
 | 
			
		||||
Select bicubic scaling algorithm.
 | 
			
		||||
 | 
			
		||||
@item experimental
 | 
			
		||||
Select experimental scaling algorithm.
 | 
			
		||||
 | 
			
		||||
@item neighbor
 | 
			
		||||
Select nearest neighbor rescaling algorithm.
 | 
			
		||||
 | 
			
		||||
@item area
 | 
			
		||||
Select averaging area rescaling algorithm.
 | 
			
		||||
 | 
			
		||||
@item bicubiclin
 | 
			
		||||
Select bicubic scaling algorithm for the luma component, bilinear for
 | 
			
		||||
chroma components.
 | 
			
		||||
 | 
			
		||||
@item gauss
 | 
			
		||||
Select Gaussian rescaling algorithm.
 | 
			
		||||
 | 
			
		||||
@item sinc
 | 
			
		||||
Select sinc rescaling algorithm.
 | 
			
		||||
 | 
			
		||||
@item lanczos
 | 
			
		||||
Select lanczos rescaling algorithm.
 | 
			
		||||
 | 
			
		||||
@item spline
 | 
			
		||||
Select natural bicubic spline rescaling algorithm.
 | 
			
		||||
 | 
			
		||||
@item print_info
 | 
			
		||||
Enable printing/debug logging.
 | 
			
		||||
 | 
			
		||||
@item accurate_rnd
 | 
			
		||||
Enable accurate rounding.
 | 
			
		||||
 | 
			
		||||
@item full_chroma_int
 | 
			
		||||
Enable full chroma interpolation.
 | 
			
		||||
 | 
			
		||||
@item full_chroma_inp
 | 
			
		||||
Select full chroma input.
 | 
			
		||||
 | 
			
		||||
@item bitexact
 | 
			
		||||
Enable bitexact output.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item srcw
 | 
			
		||||
Set source width.
 | 
			
		||||
 | 
			
		||||
@item srch
 | 
			
		||||
Set source height.
 | 
			
		||||
 | 
			
		||||
@item dstw
 | 
			
		||||
Set destination width.
 | 
			
		||||
 | 
			
		||||
@item dsth
 | 
			
		||||
Set destination height.
 | 
			
		||||
 | 
			
		||||
@item src_format
 | 
			
		||||
Set source pixel format (must be expressed as an integer).
 | 
			
		||||
 | 
			
		||||
@item dst_format
 | 
			
		||||
Set destination pixel format (must be expressed as an integer).
 | 
			
		||||
 | 
			
		||||
@item src_range
 | 
			
		||||
Select source range.
 | 
			
		||||
 | 
			
		||||
@item dst_range
 | 
			
		||||
Select destination range.
 | 
			
		||||
 | 
			
		||||
@item param0, param1
 | 
			
		||||
Set scaling algorithm parameters. The specified values are specific of
 | 
			
		||||
some scaling algorithms and ignored by others. The specified values
 | 
			
		||||
are floating point number values.
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@c man end SCALER OPTIONS
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{libswscale.html,libswscale}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), libswscale(3)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename ffmpeg-scaler
 | 
			
		||||
@settitle FFmpeg video scaling and pixel format converter
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
@@ -1,43 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle FFmpeg Utilities Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{FFmpeg Utilities Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
This document describes some generic features and utilities provided
 | 
			
		||||
by the libavutil library.
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
 | 
			
		||||
@include syntax.texi
 | 
			
		||||
@include eval.texi
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{libavutil.html,libavutil}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), libavutil(3)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename ffmpeg-utils
 | 
			
		||||
@settitle FFmpeg utilities
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
							
								
								
									
										1310
									
								
								doc/ffmpeg.texi
									
									
									
									
									
								
							
							
						
						
									
										1310
									
								
								doc/ffmpeg.texi
									
									
									
									
									
								
							
										
											
												File diff suppressed because it is too large
												Load Diff
											
										
									
								
							@@ -1,47 +0,0 @@
 | 
			
		||||
                                                                                                                                       :
 | 
			
		||||
                                             ffmpeg.c                                                                                  :       libav*
 | 
			
		||||
                                             ========                                                                                  :       ======
 | 
			
		||||
                                                                                                                                       :
 | 
			
		||||
                                                                                                                                       :
 | 
			
		||||
                                                                                                       --------------------------------:---> AVStream...
 | 
			
		||||
                                                                    InputStream input_streams[]      /                                 :
 | 
			
		||||
                                                                                                    /                                  :
 | 
			
		||||
                    InputFile input_files[]                         +==========================+   /   ^                               :
 | 
			
		||||
                                                          ------> 0 |      : st ---:-----------:--/    :                               :
 | 
			
		||||
                 ^  +------+-----------+-----+          /           +--------------------------+       :                               :
 | 
			
		||||
                 :  |      :ist_index--:-----:---------/          1 |      : st    :           |       :                               :
 | 
			
		||||
                 :  +------+-----------+-----+                      +==========================+       :                               :
 | 
			
		||||
 nb_input_files  :  |      :ist_index--:-----:------------------> 2 |      : st    :           |       :                               :
 | 
			
		||||
                 :  +------+-----------+-----+                      +--------------------------+       :  nb_input_streams             :
 | 
			
		||||
                 :  |      :ist_index  :     |                    3 |            ...           |       :                               :
 | 
			
		||||
                 v  +------+-----------+-----+                      +--------------------------+       :                               :
 | 
			
		||||
                                                              --> 4 |                          |       :                               :
 | 
			
		||||
                                                             |      +--------------------------+       :                               :
 | 
			
		||||
                                                             |    5 |                          |       :                               :
 | 
			
		||||
                                                             |      +==========================+       v                               :
 | 
			
		||||
                                                             |                                                                         :
 | 
			
		||||
                                                             |                                                                         :
 | 
			
		||||
                                                             |                                                                         :
 | 
			
		||||
                                                             |                                                                         :
 | 
			
		||||
                                                              ---------                                --------------------------------:---> AVStream...
 | 
			
		||||
                                                                        \                            /                                 :
 | 
			
		||||
                                                                    OutputStream output_streams[]   /                                  :
 | 
			
		||||
                                                                          \                        /                                   :
 | 
			
		||||
                                                                    +======\======================/======+      ^                      :
 | 
			
		||||
                                                          ------> 0 |   : source_index  : st-:---        |      :                      :
 | 
			
		||||
                    OutputFile output_files[]           /           +------------------------------------+      :                      :
 | 
			
		||||
                                                       /          1 |   :               :    :           |      :                      :
 | 
			
		||||
                 ^  +------+------------+-----+       /             +------------------------------------+      :                      :
 | 
			
		||||
                 :  |      : ost_index -:-----:------/            2 |   :               :    :           |      :                      :
 | 
			
		||||
 nb_output_files :  +------+------------+-----+                     +====================================+      :                      :
 | 
			
		||||
                 :  |      : ost_index -:-----|-----------------> 3 |   :               :    :           |      :                      :
 | 
			
		||||
                 :  +------+------------+-----+                     +------------------------------------+      : nb_output_streams    :
 | 
			
		||||
                 :  |      :            :     |                   4 |                                    |      :                      :
 | 
			
		||||
                 :  +------+------------+-----+                     +------------------------------------+      :                      :
 | 
			
		||||
                 :  |      :            :     |                   5 |                                    |      :                      :
 | 
			
		||||
                 v  +------+------------+-----+                     +------------------------------------+      :                      :
 | 
			
		||||
                                                                  6 |                                    |      :                      :
 | 
			
		||||
                                                                    +------------------------------------+      :                      :
 | 
			
		||||
                                                                  7 |                                    |      :                      :
 | 
			
		||||
                                                                    +====================================+      v                      :
 | 
			
		||||
                                                                                                                                       :
 | 
			
		||||
							
								
								
									
										172
									
								
								doc/ffmpeg_powerpc_performance_evaluation_howto.txt
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										172
									
								
								doc/ffmpeg_powerpc_performance_evaluation_howto.txt
									
									
									
									
									
										Normal file
									
								
							@@ -0,0 +1,172 @@
 | 
			
		||||
FFmpeg & evaluating performance on the PowerPC Architecture HOWTO
 | 
			
		||||
 | 
			
		||||
(c) 2003-2004 Romain Dolbeau <romain@dolbeau.org>
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
I - Introduction
 | 
			
		||||
 | 
			
		||||
The PowerPC architecture and its SIMD extension AltiVec offer some
 | 
			
		||||
interesting tools to evaluate performance and improve the code.
 | 
			
		||||
This document tries to explain how to use those tools with FFmpeg.
 | 
			
		||||
 | 
			
		||||
The architecture itself offers two ways to evaluate the performance of
 | 
			
		||||
a given piece of code:
 | 
			
		||||
 | 
			
		||||
1) The Time Base Registers (TBL)
 | 
			
		||||
2) The Performance Monitor Counter Registers (PMC)
 | 
			
		||||
 | 
			
		||||
The first ones are always available, always active, but they're not very
 | 
			
		||||
accurate: the registers increment by one every four *bus* cycles. On
 | 
			
		||||
my 667 Mhz tiBook (ppc7450), this means once every twenty *processor*
 | 
			
		||||
cycles. So we won't use that.
 | 
			
		||||
 | 
			
		||||
The PMC are much more useful: not only can they report cycle-accurate
 | 
			
		||||
timing, but they can also be used to monitor many other parameters,
 | 
			
		||||
such as the number of AltiVec stalls for every kind of instruction,
 | 
			
		||||
or instruction cache misses. The downside is that not all processors
 | 
			
		||||
support the PMC (all G3, all G4 and the 970 do support them), and
 | 
			
		||||
they're inactive by default - you need to activate them with a
 | 
			
		||||
dedicated tool. Also, the number of available PMC depends on the
 | 
			
		||||
procesor: the various 604 have 2, the various 75x (aka. G3) have 4,
 | 
			
		||||
and the various 74xx (aka G4) have 6.
 | 
			
		||||
 | 
			
		||||
*WARNING*: The PowerPC 970 is not very well documented, and its PMC
 | 
			
		||||
registers are 64 bits wide. To properly notify the code, you *must*
 | 
			
		||||
tune for the 970 (using --tune=970), or the code will assume 32 bit
 | 
			
		||||
registers.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
II - Enabling FFmpeg PowerPC performance support
 | 
			
		||||
 | 
			
		||||
This needs to be done by hand. First, you need to configure FFmpeg as
 | 
			
		||||
usual, but add the "--powerpc-perf-enable" option. For instance:
 | 
			
		||||
 | 
			
		||||
#####
 | 
			
		||||
./configure --prefix=/usr/local/ffmpeg-svn --cc=gcc-3.3 --tune=7450 --powerpc-perf-enable
 | 
			
		||||
#####
 | 
			
		||||
 | 
			
		||||
This will configure FFmpeg to install inside /usr/local/ffmpeg-svn,
 | 
			
		||||
compiling with gcc-3.3 (you should try to use this one or a newer
 | 
			
		||||
gcc), and tuning for the PowerPC 7450 (i.e. the newer G4; as a rule of
 | 
			
		||||
thumb, those at 550Mhz and more). It will also enable the PMC.
 | 
			
		||||
 | 
			
		||||
You may also edit the file "config.h" to enable the following line:
 | 
			
		||||
 | 
			
		||||
#####
 | 
			
		||||
// #define ALTIVEC_USE_REFERENCE_C_CODE 1
 | 
			
		||||
#####
 | 
			
		||||
 | 
			
		||||
If you enable this line, then the code will not make use of AltiVec,
 | 
			
		||||
but will use the reference C code instead. This is useful to compare
 | 
			
		||||
performance between two versions of the code.
 | 
			
		||||
 | 
			
		||||
Also, the number of enabled PMC is defined in "libavcodec/ppc/dsputil_ppc.h":
 | 
			
		||||
 | 
			
		||||
#####
 | 
			
		||||
#define POWERPC_NUM_PMC_ENABLED 4
 | 
			
		||||
#####
 | 
			
		||||
 | 
			
		||||
If you have a G4 CPU, you can enable all 6 PMC. DO NOT enable more
 | 
			
		||||
PMC than available on your CPU!
 | 
			
		||||
 | 
			
		||||
Then, simply compile FFmpeg as usual (make && make install).
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
III - Using FFmpeg PowerPC performance support
 | 
			
		||||
 | 
			
		||||
This FFmeg can be used exactly as usual. But before exiting, FFmpeg
 | 
			
		||||
will dump a per-function report that looks like this:
 | 
			
		||||
 | 
			
		||||
#####
 | 
			
		||||
PowerPC performance report
 | 
			
		||||
 Values are from the PMC registers, and represent whatever the
 | 
			
		||||
 registers are set to record.
 | 
			
		||||
 Function "gmc1_altivec" (pmc1):
 | 
			
		||||
        min: 231
 | 
			
		||||
        max: 1339867
 | 
			
		||||
        avg: 558.25 (255302)
 | 
			
		||||
 Function "gmc1_altivec" (pmc2):
 | 
			
		||||
        min: 93
 | 
			
		||||
        max: 2164
 | 
			
		||||
        avg: 267.31 (255302)
 | 
			
		||||
 Function "gmc1_altivec" (pmc3):
 | 
			
		||||
        min: 72
 | 
			
		||||
        max: 1987
 | 
			
		||||
        avg: 276.20 (255302)
 | 
			
		||||
(...)
 | 
			
		||||
#####
 | 
			
		||||
 | 
			
		||||
In this example, PMC1 was set to record CPU cycles, PMC2 was set to
 | 
			
		||||
record AltiVec Permute Stall Cycles, and PMC3 was set to record AltiVec
 | 
			
		||||
Issue Stalls.
 | 
			
		||||
 | 
			
		||||
The function "gmc1_altivec" was monitored 255302 times, and the
 | 
			
		||||
minimum execution time was 231 processor cycles. The max and average
 | 
			
		||||
aren't much use, as it's very likely the OS interrupted execution for
 | 
			
		||||
reasons of its own :-(
 | 
			
		||||
 | 
			
		||||
With the exact same settings and source file, but using the reference C
 | 
			
		||||
code we get:
 | 
			
		||||
 | 
			
		||||
#####
 | 
			
		||||
PowerPC performance report
 | 
			
		||||
 Values are from the PMC registers, and represent whatever the
 | 
			
		||||
 registers are set to record.
 | 
			
		||||
 Function "gmc1_altivec" (pmc1):
 | 
			
		||||
        min: 592
 | 
			
		||||
        max: 2532235
 | 
			
		||||
        avg: 962.88 (255302)
 | 
			
		||||
 Function "gmc1_altivec" (pmc2):
 | 
			
		||||
        min: 0
 | 
			
		||||
        max: 33
 | 
			
		||||
        avg: 0.00 (255302)
 | 
			
		||||
 Function "gmc1_altivec" (pmc3):
 | 
			
		||||
        min: 0
 | 
			
		||||
        max: 350
 | 
			
		||||
        avg: 0.03 (255302)
 | 
			
		||||
(...)
 | 
			
		||||
#####
 | 
			
		||||
 | 
			
		||||
592 cycles, so the fastest AltiVec execution is about 2.5x faster than
 | 
			
		||||
the fastest C execution in this example. It's not perfect but it's not
 | 
			
		||||
bad (well I wrote this function so I can't say otherwise :-).
 | 
			
		||||
 | 
			
		||||
Once you have that kind of report, you can try to improve things by
 | 
			
		||||
finding what goes wrong and fixing it; in the example above, one
 | 
			
		||||
should try to diminish the number of AltiVec stalls, as this *may*
 | 
			
		||||
improve performance.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
IV) Enabling the PMC in Mac OS X
 | 
			
		||||
 | 
			
		||||
This is easy. Use "Monster" and "monster". Those tools come from
 | 
			
		||||
Apple's CHUD package, and can be found hidden in the developer web
 | 
			
		||||
site & FTP site. "MONster" is the graphical application, use it to
 | 
			
		||||
generate a config file specifying what each register should
 | 
			
		||||
monitor. Then use the command-line application "monster" to use that
 | 
			
		||||
config file, and enjoy the results.
 | 
			
		||||
 | 
			
		||||
Note that "MONster" can be used for many other things, but it's
 | 
			
		||||
documented by Apple, it's not my subject.
 | 
			
		||||
 | 
			
		||||
If you are using CHUD 4.4.2 or later, you'll notice that MONster is
 | 
			
		||||
no longer available. It's been superseeded by Shark, where
 | 
			
		||||
configuration of PMCs is available as a plugin.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
V) Enabling the PMC on Linux
 | 
			
		||||
 | 
			
		||||
On linux you may use oprofile from http://oprofile.sf.net, depending on the
 | 
			
		||||
version and the cpu you may need to apply a patch[1] to access a set of the
 | 
			
		||||
possibile counters from the userspace application. You can always define them
 | 
			
		||||
using the kernel interface /dev/oprofile/* .
 | 
			
		||||
 | 
			
		||||
[1] http://dev.gentoo.org/~lu_zero/development/oprofile-g4-20060423.patch
 | 
			
		||||
 | 
			
		||||
--
 | 
			
		||||
Romain Dolbeau <romain@dolbeau.org>
 | 
			
		||||
Luca Barbato <lu_zero@gentoo.org>
 | 
			
		||||
@@ -1,30 +1,33 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle ffplay Documentation
 | 
			
		||||
@settitle FFplay Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{ffplay Documentation}
 | 
			
		||||
@sp 7
 | 
			
		||||
@center @titlefont{FFplay Documentation}
 | 
			
		||||
@sp 3
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
@chapter Introduction
 | 
			
		||||
 | 
			
		||||
@chapter Synopsis
 | 
			
		||||
 | 
			
		||||
ffplay [@var{options}] [@file{input_file}]
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
FFplay is a very simple and portable media player using the FFmpeg
 | 
			
		||||
libraries and the SDL library. It is mostly used as a testbed for the
 | 
			
		||||
various FFmpeg APIs.
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@chapter Options
 | 
			
		||||
@chapter Invocation
 | 
			
		||||
 | 
			
		||||
@section Syntax
 | 
			
		||||
@example
 | 
			
		||||
@c man begin SYNOPSIS
 | 
			
		||||
ffplay [options] @file{input_file}
 | 
			
		||||
@c man end
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@c man begin OPTIONS
 | 
			
		||||
 | 
			
		||||
@include avtools-common-opts.texi
 | 
			
		||||
@include fftools-common-opts.texi
 | 
			
		||||
 | 
			
		||||
@section Main options
 | 
			
		||||
 | 
			
		||||
@@ -34,9 +37,8 @@ Force displayed width.
 | 
			
		||||
@item -y @var{height}
 | 
			
		||||
Force displayed height.
 | 
			
		||||
@item -s @var{size}
 | 
			
		||||
Set frame size (WxH or abbreviation), needed for videos which do
 | 
			
		||||
not contain a header with the frame size like raw YUV.  This option
 | 
			
		||||
has been deprecated in favor of private options, try -video_size.
 | 
			
		||||
Set frame size (WxH or abbreviation), needed for videos which don't
 | 
			
		||||
contain a header with the frame size like raw YUV.
 | 
			
		||||
@item -an
 | 
			
		||||
Disable audio.
 | 
			
		||||
@item -vn
 | 
			
		||||
@@ -55,44 +57,21 @@ Force format.
 | 
			
		||||
Set window title (default is the input filename).
 | 
			
		||||
@item -loop @var{number}
 | 
			
		||||
Loops movie playback <number> times. 0 means forever.
 | 
			
		||||
@item -showmode @var{mode}
 | 
			
		||||
Set the show mode to use.
 | 
			
		||||
Available values for @var{mode} are:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item 0, video
 | 
			
		||||
show video
 | 
			
		||||
@item 1, waves
 | 
			
		||||
show audio waves
 | 
			
		||||
@item 2, rdft
 | 
			
		||||
show audio frequency band using RDFT ((Inverse) Real Discrete Fourier Transform)
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
Default value is "video", if video is not present or cannot be played
 | 
			
		||||
"rdft" is automatically selected.
 | 
			
		||||
 | 
			
		||||
You can interactively cycle through the available show modes by
 | 
			
		||||
pressing the key @key{w}.
 | 
			
		||||
 | 
			
		||||
@item -vf @var{filter_graph}
 | 
			
		||||
@var{filter_graph} is a description of the filter graph to apply to
 | 
			
		||||
the input video.
 | 
			
		||||
Use the option "-filters" to show all the available filters (including
 | 
			
		||||
also sources and sinks).
 | 
			
		||||
 | 
			
		||||
@item -i @var{input_file}
 | 
			
		||||
Read @var{input_file}.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section Advanced options
 | 
			
		||||
@table @option
 | 
			
		||||
@item -pix_fmt @var{format}
 | 
			
		||||
Set pixel format.
 | 
			
		||||
This option has been deprecated in favor of private options, try -pixel_format.
 | 
			
		||||
@item -stats
 | 
			
		||||
Show the stream duration, the codec parameters, the current position in
 | 
			
		||||
the stream and the audio/video synchronisation drift.
 | 
			
		||||
@item -debug
 | 
			
		||||
Print specific debug info.
 | 
			
		||||
@item -bug
 | 
			
		||||
Work around bugs.
 | 
			
		||||
@item -vismv
 | 
			
		||||
Visualize motion vectors.
 | 
			
		||||
@item -fast
 | 
			
		||||
Non-spec-compliant optimizations.
 | 
			
		||||
@item -genpts
 | 
			
		||||
@@ -124,26 +103,6 @@ Select the desired subtitle stream number, counting from 0. The number
 | 
			
		||||
refers to the list of all the input subtitle streams. If it is greater
 | 
			
		||||
than the number of subtitle streams minus one, then the last one is
 | 
			
		||||
selected, if it is negative the subtitle rendering is disabled.
 | 
			
		||||
@item -autoexit
 | 
			
		||||
Exit when video is done playing.
 | 
			
		||||
@item -exitonkeydown
 | 
			
		||||
Exit if any key is pressed.
 | 
			
		||||
@item -exitonmousedown
 | 
			
		||||
Exit if any mouse button is pressed.
 | 
			
		||||
 | 
			
		||||
@item -codec:@var{media_specifier} @var{codec_name}
 | 
			
		||||
Force a specific decoder implementation for the stream identified by
 | 
			
		||||
@var{media_specifier}, which can assume the values @code{a} (audio),
 | 
			
		||||
@code{v} (video), and @code{s} subtitle.
 | 
			
		||||
 | 
			
		||||
@item -acodec @var{codec_name}
 | 
			
		||||
Force a specific audio decoder.
 | 
			
		||||
 | 
			
		||||
@item -vcodec @var{codec_name}
 | 
			
		||||
Force a specific video decoder.
 | 
			
		||||
 | 
			
		||||
@item -scodec @var{codec_name}
 | 
			
		||||
Force a specific subtitle decoder.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section While playing
 | 
			
		||||
@@ -176,9 +135,6 @@ Seek backward/forward 10 seconds.
 | 
			
		||||
@item down/up
 | 
			
		||||
Seek backward/forward 1 minute.
 | 
			
		||||
 | 
			
		||||
@item page down/page up
 | 
			
		||||
Seek backward/forward 10 minutes.
 | 
			
		||||
 | 
			
		||||
@item mouse click
 | 
			
		||||
Seek to percentage in file corresponding to fraction of width.
 | 
			
		||||
 | 
			
		||||
@@ -186,35 +142,19 @@ Seek to percentage in file corresponding to fraction of width.
 | 
			
		||||
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{ffmpeg-utils.html,ffmpeg-utils},
 | 
			
		||||
@url{ffmpeg-scaler.html,ffmpeg-scaler},
 | 
			
		||||
@url{ffmpeg-resampler.html,ffmpeg-resampler},
 | 
			
		||||
@url{ffmpeg-codecs.html,ffmpeg-codecs},
 | 
			
		||||
@url{ffmpeg-bitstream-filters,ffmpeg-bitstream-filters},
 | 
			
		||||
@url{ffmpeg-formats.html,ffmpeg-formats},
 | 
			
		||||
@url{ffmpeg-devices.html,ffmpeg-devices},
 | 
			
		||||
@url{ffmpeg-protocols.html,ffmpeg-protocols},
 | 
			
		||||
@url{ffmpeg-filters.html,ffmpeg-filters}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffprobe(1), ffserver(1),
 | 
			
		||||
ffmpeg-utils(1), ffmpeg-scaler(1), ffmpeg-resampler(1),
 | 
			
		||||
ffmpeg-codecs(1), ffmpeg-bitstream-filters(1), ffmpeg-formats(1),
 | 
			
		||||
ffmpeg-devices(1), ffmpeg-protocols(1), ffmpeg-filters(1)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename ffplay
 | 
			
		||||
@settitle FFplay media player
 | 
			
		||||
 | 
			
		||||
@c man begin SEEALSO
 | 
			
		||||
ffmpeg(1), ffserver(1) and the HTML documentation of @file{ffmpeg}.
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@c man begin AUTHOR
 | 
			
		||||
Fabrice Bellard
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
							
								
								
									
										121
									
								
								doc/ffprobe-doc.texi
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										121
									
								
								doc/ffprobe-doc.texi
									
									
									
									
									
										Normal file
									
								
							@@ -0,0 +1,121 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle FFprobe Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@sp 7
 | 
			
		||||
@center @titlefont{FFprobe Documentation}
 | 
			
		||||
@sp 3
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@chapter Introduction
 | 
			
		||||
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
FFprobe gathers information from multimedia streams and prints it in
 | 
			
		||||
human- and machine-readable fashion.
 | 
			
		||||
 | 
			
		||||
For example it can be used to check the format of the container used
 | 
			
		||||
by a multimedia stream and the format and type of each media stream
 | 
			
		||||
contained in it.
 | 
			
		||||
 | 
			
		||||
If a filename is specified in input, ffprobe will try to open and
 | 
			
		||||
probe the file content. If the file cannot be opened or recognized as
 | 
			
		||||
a multimedia file, a positive exit code is returned.
 | 
			
		||||
 | 
			
		||||
FFprobe may be employed both as a standalone application or in
 | 
			
		||||
combination with a textual filter, which may perform more
 | 
			
		||||
sophisticated processing, e.g. statistical processing or plotting.
 | 
			
		||||
 | 
			
		||||
Options are used to list some of the formats supported by ffprobe or
 | 
			
		||||
for specifying which information to display, and for setting how
 | 
			
		||||
ffprobe will show it.
 | 
			
		||||
 | 
			
		||||
FFprobe output is designed to be easily parsable by a textual filter,
 | 
			
		||||
and consists of one or more sections of the form:
 | 
			
		||||
@example
 | 
			
		||||
[SECTION]
 | 
			
		||||
key1=val1
 | 
			
		||||
...
 | 
			
		||||
keyN=valN
 | 
			
		||||
[/SECTION]
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Metadata tags stored in the container or in the streams are recognized
 | 
			
		||||
and printed in the corresponding ``FORMAT'' or ``STREAM'' section, and
 | 
			
		||||
are prefixed by the string ``TAG:''.
 | 
			
		||||
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@chapter Invocation
 | 
			
		||||
 | 
			
		||||
@section Syntax
 | 
			
		||||
 | 
			
		||||
The generic syntax is:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
@c man begin SYNOPSIS
 | 
			
		||||
ffprobe [options] [@file{input_file}]
 | 
			
		||||
@c man end
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@c man begin OPTIONS
 | 
			
		||||
 | 
			
		||||
@include fftools-common-opts.texi
 | 
			
		||||
 | 
			
		||||
@section Main options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item -convert_tags
 | 
			
		||||
Convert the tag names in the format container to the generic FFmpeg tag names.
 | 
			
		||||
 | 
			
		||||
@item -f @var{format}
 | 
			
		||||
Force format to use.
 | 
			
		||||
 | 
			
		||||
@item -unit
 | 
			
		||||
Show the unit of the displayed values.
 | 
			
		||||
 | 
			
		||||
@item -prefix
 | 
			
		||||
Show a SI prefixes of the displayed values.
 | 
			
		||||
Unless ``-byte_binary_prefix'' option is used all the prefix
 | 
			
		||||
are decimal.
 | 
			
		||||
 | 
			
		||||
@item -byte_binary_prefix
 | 
			
		||||
Force the use of binary prefixes for byte values.
 | 
			
		||||
 | 
			
		||||
@item -sexagesimal
 | 
			
		||||
Use sexagesimal format HH:MM:SS.MICROSECONDS for time values.
 | 
			
		||||
 | 
			
		||||
@item -pretty
 | 
			
		||||
Prettify the format of the displayed values, it corresponds to the
 | 
			
		||||
options ``-unit -prefix -byte_binary_prefix -sexagesimal''.
 | 
			
		||||
 | 
			
		||||
@item -show_format
 | 
			
		||||
Show information about the container format of the input multimedia
 | 
			
		||||
stream.
 | 
			
		||||
 | 
			
		||||
All the container format information is printed within a section with
 | 
			
		||||
name ``FORMAT''.
 | 
			
		||||
 | 
			
		||||
@item -show_streams
 | 
			
		||||
Show information about each media stream contained in the input
 | 
			
		||||
multimedia stream.
 | 
			
		||||
 | 
			
		||||
Each media stream information is printed within a dedicated section
 | 
			
		||||
with name ``STREAM''.
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename ffprobe
 | 
			
		||||
@settitle FFprobe media prober
 | 
			
		||||
 | 
			
		||||
@c man begin SEEALSO
 | 
			
		||||
ffmpeg(1), ffplay(1), ffserver(1)
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
							
								
								
									
										521
									
								
								doc/ffprobe.texi
									
									
									
									
									
								
							
							
						
						
									
										521
									
								
								doc/ffprobe.texi
									
									
									
									
									
								
							@@ -1,521 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle ffprobe Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{ffprobe Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Synopsis
 | 
			
		||||
 | 
			
		||||
ffprobe [@var{options}] [@file{input_file}]
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
ffprobe gathers information from multimedia streams and prints it in
 | 
			
		||||
human- and machine-readable fashion.
 | 
			
		||||
 | 
			
		||||
For example it can be used to check the format of the container used
 | 
			
		||||
by a multimedia stream and the format and type of each media stream
 | 
			
		||||
contained in it.
 | 
			
		||||
 | 
			
		||||
If a filename is specified in input, ffprobe will try to open and
 | 
			
		||||
probe the file content. If the file cannot be opened or recognized as
 | 
			
		||||
a multimedia file, a positive exit code is returned.
 | 
			
		||||
 | 
			
		||||
ffprobe may be employed both as a standalone application or in
 | 
			
		||||
combination with a textual filter, which may perform more
 | 
			
		||||
sophisticated processing, e.g. statistical processing or plotting.
 | 
			
		||||
 | 
			
		||||
Options are used to list some of the formats supported by ffprobe or
 | 
			
		||||
for specifying which information to display, and for setting how
 | 
			
		||||
ffprobe will show it.
 | 
			
		||||
 | 
			
		||||
ffprobe output is designed to be easily parsable by a textual filter,
 | 
			
		||||
and consists of one or more sections of a form defined by the selected
 | 
			
		||||
writer, which is specified by the @option{print_format} option.
 | 
			
		||||
 | 
			
		||||
Sections may contain other nested sections, and are identified by a
 | 
			
		||||
name (which may be shared by other sections), and an unique
 | 
			
		||||
name. See the output of @option{sections}.
 | 
			
		||||
 | 
			
		||||
Metadata tags stored in the container or in the streams are recognized
 | 
			
		||||
and printed in the corresponding "FORMAT" or "STREAM" section.
 | 
			
		||||
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@chapter Options
 | 
			
		||||
@c man begin OPTIONS
 | 
			
		||||
 | 
			
		||||
@include avtools-common-opts.texi
 | 
			
		||||
 | 
			
		||||
@section Main options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item -f @var{format}
 | 
			
		||||
Force format to use.
 | 
			
		||||
 | 
			
		||||
@item -unit
 | 
			
		||||
Show the unit of the displayed values.
 | 
			
		||||
 | 
			
		||||
@item -prefix
 | 
			
		||||
Use SI prefixes for the displayed values.
 | 
			
		||||
Unless the "-byte_binary_prefix" option is used all the prefixes
 | 
			
		||||
are decimal.
 | 
			
		||||
 | 
			
		||||
@item -byte_binary_prefix
 | 
			
		||||
Force the use of binary prefixes for byte values.
 | 
			
		||||
 | 
			
		||||
@item -sexagesimal
 | 
			
		||||
Use sexagesimal format HH:MM:SS.MICROSECONDS for time values.
 | 
			
		||||
 | 
			
		||||
@item -pretty
 | 
			
		||||
Prettify the format of the displayed values, it corresponds to the
 | 
			
		||||
options "-unit -prefix -byte_binary_prefix -sexagesimal".
 | 
			
		||||
 | 
			
		||||
@item -of, -print_format @var{writer_name}[=@var{writer_options}]
 | 
			
		||||
Set the output printing format.
 | 
			
		||||
 | 
			
		||||
@var{writer_name} specifies the name of the writer, and
 | 
			
		||||
@var{writer_options} specifies the options to be passed to the writer.
 | 
			
		||||
 | 
			
		||||
For example for printing the output in JSON format, specify:
 | 
			
		||||
@example
 | 
			
		||||
-print_format json
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
For more details on the available output printing formats, see the
 | 
			
		||||
Writers section below.
 | 
			
		||||
 | 
			
		||||
@item -sections
 | 
			
		||||
Print sections structure and section information, and exit. The output
 | 
			
		||||
is not meant to be parsed by a machine.
 | 
			
		||||
 | 
			
		||||
@item -select_streams @var{stream_specifier}
 | 
			
		||||
Select only the streams specified by @var{stream_specifier}. This
 | 
			
		||||
option affects only the options related to streams
 | 
			
		||||
(e.g. @code{show_streams}, @code{show_packets}, etc.).
 | 
			
		||||
 | 
			
		||||
For example to show only audio streams, you can use the command:
 | 
			
		||||
@example
 | 
			
		||||
ffprobe -show_streams -select_streams a INPUT
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
To show only video packets belonging to the video stream with index 1:
 | 
			
		||||
@example
 | 
			
		||||
ffprobe -show_packets -select_streams v:1 INPUT
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item -show_data
 | 
			
		||||
Show payload data, as an hexadecimal and ASCII dump. Coupled with
 | 
			
		||||
@option{-show_packets}, it will dump the packets' data. Coupled with
 | 
			
		||||
@option{-show_streams}, it will dump the codec extradata.
 | 
			
		||||
 | 
			
		||||
The dump is printed as the "data" field. It may contain newlines.
 | 
			
		||||
 | 
			
		||||
@item -show_error
 | 
			
		||||
Show information about the error found when trying to probe the input.
 | 
			
		||||
 | 
			
		||||
The error information is printed within a section with name "ERROR".
 | 
			
		||||
 | 
			
		||||
@item -show_format
 | 
			
		||||
Show information about the container format of the input multimedia
 | 
			
		||||
stream.
 | 
			
		||||
 | 
			
		||||
All the container format information is printed within a section with
 | 
			
		||||
name "FORMAT".
 | 
			
		||||
 | 
			
		||||
@item -show_format_entry @var{name}
 | 
			
		||||
Like @option{-show_format}, but only prints the specified entry of the
 | 
			
		||||
container format information, rather than all. This option may be given more
 | 
			
		||||
than once, then all specified entries will be shown.
 | 
			
		||||
 | 
			
		||||
This option is deprecated, use @code{show_entries} instead.
 | 
			
		||||
 | 
			
		||||
@item -show_entries @var{section_entries}
 | 
			
		||||
Set list of entries to show.
 | 
			
		||||
 | 
			
		||||
Entries are specified according to the following
 | 
			
		||||
syntax. @var{section_entries} contains a list of section entries
 | 
			
		||||
separated by @code{:}. Each section entry is composed by a section
 | 
			
		||||
name (or unique name), optionally followed by a list of entries local
 | 
			
		||||
to that section, separated by @code{,}.
 | 
			
		||||
 | 
			
		||||
If section name is specified but is followed by no @code{=}, all
 | 
			
		||||
entries are printed to output, together with all the contained
 | 
			
		||||
sections. Otherwise only the entries specified in the local section
 | 
			
		||||
entries list are printed. In particular, if @code{=} is specified but
 | 
			
		||||
the list of local entries is empty, then no entries will be shown for
 | 
			
		||||
that section.
 | 
			
		||||
 | 
			
		||||
Note that the order of specification of the local section entries is
 | 
			
		||||
not honored in the output, and the usual display order will be
 | 
			
		||||
retained.
 | 
			
		||||
 | 
			
		||||
The formal syntax is given by:
 | 
			
		||||
@example
 | 
			
		||||
@var{LOCAL_SECTION_ENTRIES} ::= @var{SECTION_ENTRY_NAME}[,@var{LOCAL_SECTION_ENTRIES}]
 | 
			
		||||
@var{SECTION_ENTRY}         ::= @var{SECTION_NAME}[=[@var{LOCAL_SECTION_ENTRIES}]]
 | 
			
		||||
@var{SECTION_ENTRIES}       ::= @var{SECTION_ENTRY}[:@var{SECTION_ENTRIES}]
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
For example, to show only the index and type of each stream, and the PTS
 | 
			
		||||
time, duration time, and stream index of the packets, you can specify
 | 
			
		||||
the argument:
 | 
			
		||||
@example
 | 
			
		||||
packet=pts_time,duration_time,stream_index : stream=index,codec_type
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
To show all the entries in the section "format", but only the codec
 | 
			
		||||
type in the section "stream", specify the argument:
 | 
			
		||||
@example
 | 
			
		||||
format : stream=codec_type
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
To show all the tags in the stream and format sections:
 | 
			
		||||
@example
 | 
			
		||||
format_tags : format_tags
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
To show only the @code{title} tag (if available) in the stream
 | 
			
		||||
sections:
 | 
			
		||||
@example
 | 
			
		||||
stream_tags=title
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item -show_packets
 | 
			
		||||
Show information about each packet contained in the input multimedia
 | 
			
		||||
stream.
 | 
			
		||||
 | 
			
		||||
The information for each single packet is printed within a dedicated
 | 
			
		||||
section with name "PACKET".
 | 
			
		||||
 | 
			
		||||
@item -show_frames
 | 
			
		||||
Show information about each frame contained in the input multimedia
 | 
			
		||||
stream.
 | 
			
		||||
 | 
			
		||||
The information for each single frame is printed within a dedicated
 | 
			
		||||
section with name "FRAME".
 | 
			
		||||
 | 
			
		||||
@item -show_streams
 | 
			
		||||
Show information about each media stream contained in the input
 | 
			
		||||
multimedia stream.
 | 
			
		||||
 | 
			
		||||
Each media stream information is printed within a dedicated section
 | 
			
		||||
with name "STREAM".
 | 
			
		||||
 | 
			
		||||
@item -count_frames
 | 
			
		||||
Count the number of frames per stream and report it in the
 | 
			
		||||
corresponding stream section.
 | 
			
		||||
 | 
			
		||||
@item -count_packets
 | 
			
		||||
Count the number of packets per stream and report it in the
 | 
			
		||||
corresponding stream section.
 | 
			
		||||
 | 
			
		||||
@item -show_private_data, -private
 | 
			
		||||
Show private data, that is data depending on the format of the
 | 
			
		||||
particular shown element.
 | 
			
		||||
This option is enabled by default, but you may need to disable it
 | 
			
		||||
for specific uses, for example when creating XSD-compliant XML output.
 | 
			
		||||
 | 
			
		||||
@item -show_program_version
 | 
			
		||||
Show information related to program version.
 | 
			
		||||
 | 
			
		||||
Version information is printed within a section with name
 | 
			
		||||
"PROGRAM_VERSION".
 | 
			
		||||
 | 
			
		||||
@item -show_library_versions
 | 
			
		||||
Show information related to library versions.
 | 
			
		||||
 | 
			
		||||
Version information for each library is printed within a section with
 | 
			
		||||
name "LIBRARY_VERSION".
 | 
			
		||||
 | 
			
		||||
@item -show_versions
 | 
			
		||||
Show information related to program and library versions. This is the
 | 
			
		||||
equivalent of setting both @option{-show_program_version} and
 | 
			
		||||
@option{-show_library_versions} options.
 | 
			
		||||
 | 
			
		||||
@item -bitexact
 | 
			
		||||
Force bitexact output, useful to produce output which is not dependent
 | 
			
		||||
on the specific build.
 | 
			
		||||
 | 
			
		||||
@item -i @var{input_file}
 | 
			
		||||
Read @var{input_file}.
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@chapter Writers
 | 
			
		||||
@c man begin WRITERS
 | 
			
		||||
 | 
			
		||||
A writer defines the output format adopted by @command{ffprobe}, and will be
 | 
			
		||||
used for printing all the parts of the output.
 | 
			
		||||
 | 
			
		||||
A writer may accept one or more arguments, which specify the options
 | 
			
		||||
to adopt. The options are specified as a list of @var{key}=@var{value}
 | 
			
		||||
pairs, separated by ":".
 | 
			
		||||
 | 
			
		||||
A description of the currently available writers follows.
 | 
			
		||||
 | 
			
		||||
@section default
 | 
			
		||||
Default format.
 | 
			
		||||
 | 
			
		||||
Print each section in the form:
 | 
			
		||||
@example
 | 
			
		||||
[SECTION]
 | 
			
		||||
key1=val1
 | 
			
		||||
...
 | 
			
		||||
keyN=valN
 | 
			
		||||
[/SECTION]
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Metadata tags are printed as a line in the corresponding FORMAT or
 | 
			
		||||
STREAM section, and are prefixed by the string "TAG:".
 | 
			
		||||
 | 
			
		||||
A description of the accepted options follows.
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item nokey, nk
 | 
			
		||||
If set to 1 specify not to print the key of each field. Default value
 | 
			
		||||
is 0.
 | 
			
		||||
 | 
			
		||||
@item noprint_wrappers, nw
 | 
			
		||||
If set to 1 specify not to print the section header and footer.
 | 
			
		||||
Default value is 0.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section compact, csv
 | 
			
		||||
Compact and CSV format.
 | 
			
		||||
 | 
			
		||||
The @code{csv} writer is equivalent to @code{compact}, but supports
 | 
			
		||||
different defaults.
 | 
			
		||||
 | 
			
		||||
Each section is printed on a single line.
 | 
			
		||||
If no option is specifid, the output has the form:
 | 
			
		||||
@example
 | 
			
		||||
section|key1=val1| ... |keyN=valN
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Metadata tags are printed in the corresponding "format" or "stream"
 | 
			
		||||
section. A metadata tag key, if printed, is prefixed by the string
 | 
			
		||||
"tag:".
 | 
			
		||||
 | 
			
		||||
The description of the accepted options follows.
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item item_sep, s
 | 
			
		||||
Specify the character to use for separating fields in the output line.
 | 
			
		||||
It must be a single printable character, it is "|" by default ("," for
 | 
			
		||||
the @code{csv} writer).
 | 
			
		||||
 | 
			
		||||
@item nokey, nk
 | 
			
		||||
If set to 1 specify not to print the key of each field. Its default
 | 
			
		||||
value is 0 (1 for the @code{csv} writer).
 | 
			
		||||
 | 
			
		||||
@item escape, e
 | 
			
		||||
Set the escape mode to use, default to "c" ("csv" for the @code{csv}
 | 
			
		||||
writer).
 | 
			
		||||
 | 
			
		||||
It can assume one of the following values:
 | 
			
		||||
@table @option
 | 
			
		||||
@item c
 | 
			
		||||
Perform C-like escaping. Strings containing a newline ('\n'), carriage
 | 
			
		||||
return ('\r'), a tab ('\t'), a form feed ('\f'), the escaping
 | 
			
		||||
character ('\') or the item separator character @var{SEP} are escaped using C-like fashioned
 | 
			
		||||
escaping, so that a newline is converted to the sequence "\n", a
 | 
			
		||||
carriage return to "\r", '\' to "\\" and the separator @var{SEP} is
 | 
			
		||||
converted to "\@var{SEP}".
 | 
			
		||||
 | 
			
		||||
@item csv
 | 
			
		||||
Perform CSV-like escaping, as described in RFC4180.  Strings
 | 
			
		||||
containing a newline ('\n'), a carriage return ('\r'), a double quote
 | 
			
		||||
('"'), or @var{SEP} are enclosed in double-quotes.
 | 
			
		||||
 | 
			
		||||
@item none
 | 
			
		||||
Perform no escaping.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item print_section, p
 | 
			
		||||
Print the section name at the begin of each line if the value is
 | 
			
		||||
@code{1}, disable it with value set to @code{0}. Default value is
 | 
			
		||||
@code{1}.
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section flat
 | 
			
		||||
Flat format.
 | 
			
		||||
 | 
			
		||||
A free-form output where each line contains an explicit key=value, such as
 | 
			
		||||
"streams.stream.3.tags.foo=bar". The output is shell escaped, so it can be
 | 
			
		||||
directly embedded in sh scripts as long as the separator character is an
 | 
			
		||||
alphanumeric character or an underscore (see @var{sep_char} option).
 | 
			
		||||
 | 
			
		||||
The description of the accepted options follows.
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item sep_char, s
 | 
			
		||||
Separator character used to separate the chapter, the section name, IDs and
 | 
			
		||||
potential tags in the printed field key.
 | 
			
		||||
 | 
			
		||||
Default value is '.'.
 | 
			
		||||
 | 
			
		||||
@item hierarchical, h
 | 
			
		||||
Specify if the section name specification should be hierarchical. If
 | 
			
		||||
set to 1, and if there is more than one section in the current
 | 
			
		||||
chapter, the section name will be prefixed by the name of the
 | 
			
		||||
chapter. A value of 0 will disable this behavior.
 | 
			
		||||
 | 
			
		||||
Default value is 1.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section ini
 | 
			
		||||
INI format output.
 | 
			
		||||
 | 
			
		||||
Print output in an INI based format.
 | 
			
		||||
 | 
			
		||||
The following conventions are adopted:
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
@item
 | 
			
		||||
all key and values are UTF-8
 | 
			
		||||
@item
 | 
			
		||||
'.' is the subgroup separator
 | 
			
		||||
@item
 | 
			
		||||
newline, '\t', '\f', '\b' and the following characters are escaped
 | 
			
		||||
@item
 | 
			
		||||
'\' is the escape character
 | 
			
		||||
@item
 | 
			
		||||
'#' is the comment indicator
 | 
			
		||||
@item
 | 
			
		||||
'=' is the key/value separator
 | 
			
		||||
@item
 | 
			
		||||
':' is not used but usually parsed as key/value separator
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
This writer accepts options as a list of @var{key}=@var{value} pairs,
 | 
			
		||||
separated by ":".
 | 
			
		||||
 | 
			
		||||
The description of the accepted options follows.
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item hierarchical, h
 | 
			
		||||
Specify if the section name specification should be hierarchical. If
 | 
			
		||||
set to 1, and if there is more than one section in the current
 | 
			
		||||
chapter, the section name will be prefixed by the name of the
 | 
			
		||||
chapter. A value of 0 will disable this behavior.
 | 
			
		||||
 | 
			
		||||
Default value is 1.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section json
 | 
			
		||||
JSON based format.
 | 
			
		||||
 | 
			
		||||
Each section is printed using JSON notation.
 | 
			
		||||
 | 
			
		||||
The description of the accepted options follows.
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item compact, c
 | 
			
		||||
If set to 1 enable compact output, that is each section will be
 | 
			
		||||
printed on a single line. Default value is 0.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
For more information about JSON, see @url{http://www.json.org/}.
 | 
			
		||||
 | 
			
		||||
@section xml
 | 
			
		||||
XML based format.
 | 
			
		||||
 | 
			
		||||
The XML output is described in the XML schema description file
 | 
			
		||||
@file{ffprobe.xsd} installed in the FFmpeg datadir.
 | 
			
		||||
 | 
			
		||||
An updated version of the schema can be retrieved at the url
 | 
			
		||||
@url{http://www.ffmpeg.org/schema/ffprobe.xsd}, which redirects to the
 | 
			
		||||
latest schema committed into the FFmpeg development source code tree.
 | 
			
		||||
 | 
			
		||||
Note that the output issued will be compliant to the
 | 
			
		||||
@file{ffprobe.xsd} schema only when no special global output options
 | 
			
		||||
(@option{unit}, @option{prefix}, @option{byte_binary_prefix},
 | 
			
		||||
@option{sexagesimal} etc.) are specified.
 | 
			
		||||
 | 
			
		||||
The description of the accepted options follows.
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item fully_qualified, q
 | 
			
		||||
If set to 1 specify if the output should be fully qualified. Default
 | 
			
		||||
value is 0.
 | 
			
		||||
This is required for generating an XML file which can be validated
 | 
			
		||||
through an XSD file.
 | 
			
		||||
 | 
			
		||||
@item xsd_compliant, x
 | 
			
		||||
If set to 1 perform more checks for ensuring that the output is XSD
 | 
			
		||||
compliant. Default value is 0.
 | 
			
		||||
This option automatically sets @option{fully_qualified} to 1.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
For more information about the XML format, see
 | 
			
		||||
@url{http://www.w3.org/XML/}.
 | 
			
		||||
@c man end WRITERS
 | 
			
		||||
 | 
			
		||||
@chapter Timecode
 | 
			
		||||
@c man begin TIMECODE
 | 
			
		||||
 | 
			
		||||
@command{ffprobe} supports Timecode extraction:
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
MPEG1/2 timecode is extracted from the GOP, and is available in the video
 | 
			
		||||
stream details (@option{-show_streams}, see @var{timecode}).
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
MOV timecode is extracted from tmcd track, so is available in the tmcd
 | 
			
		||||
stream metadata (@option{-show_streams}, see @var{TAG:timecode}).
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
DV, GXF and AVI timecodes are available in format metadata
 | 
			
		||||
(@option{-show_format}, see @var{TAG:timecode}).
 | 
			
		||||
 | 
			
		||||
@end itemize
 | 
			
		||||
@c man end TIMECODE
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffplay.html,ffmpeg}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{ffmpeg-utils.html,ffmpeg-utils},
 | 
			
		||||
@url{ffmpeg-scaler.html,ffmpeg-scaler},
 | 
			
		||||
@url{ffmpeg-resampler.html,ffmpeg-resampler},
 | 
			
		||||
@url{ffmpeg-codecs.html,ffmpeg-codecs},
 | 
			
		||||
@url{ffmpeg-bitstream-filters,ffmpeg-bitstream-filters},
 | 
			
		||||
@url{ffmpeg-formats.html,ffmpeg-formats},
 | 
			
		||||
@url{ffmpeg-devices.html,ffmpeg-devices},
 | 
			
		||||
@url{ffmpeg-protocols.html,ffmpeg-protocols},
 | 
			
		||||
@url{ffmpeg-filters.html,ffmpeg-filters}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffserver(1),
 | 
			
		||||
ffmpeg-utils(1), ffmpeg-scaler(1), ffmpeg-resampler(1),
 | 
			
		||||
ffmpeg-codecs(1), ffmpeg-bitstream-filters(1), ffmpeg-formats(1),
 | 
			
		||||
ffmpeg-devices(1), ffmpeg-protocols(1), ffmpeg-filters(1)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename ffprobe
 | 
			
		||||
@settitle ffprobe media prober
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
							
								
								
									
										199
									
								
								doc/ffprobe.xsd
									
									
									
									
									
								
							
							
						
						
									
										199
									
								
								doc/ffprobe.xsd
									
									
									
									
									
								
							@@ -1,199 +0,0 @@
 | 
			
		||||
<?xml version="1.0" encoding="UTF-8"?>
 | 
			
		||||
 | 
			
		||||
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
 | 
			
		||||
    targetNamespace="http://www.ffmpeg.org/schema/ffprobe"
 | 
			
		||||
    xmlns:ffprobe="http://www.ffmpeg.org/schema/ffprobe">
 | 
			
		||||
 | 
			
		||||
    <xsd:element name="ffprobe" type="ffprobe:ffprobeType"/>
 | 
			
		||||
 | 
			
		||||
    <xsd:complexType name="ffprobeType">
 | 
			
		||||
        <xsd:sequence>
 | 
			
		||||
            <xsd:element name="packets"  type="ffprobe:packetsType" minOccurs="0" maxOccurs="1" />
 | 
			
		||||
            <xsd:element name="frames"   type="ffprobe:framesType"  minOccurs="0" maxOccurs="1" />
 | 
			
		||||
            <xsd:element name="streams"  type="ffprobe:streamsType" minOccurs="0" maxOccurs="1" />
 | 
			
		||||
            <xsd:element name="format"   type="ffprobe:formatType"  minOccurs="0" maxOccurs="1" />
 | 
			
		||||
            <xsd:element name="error"    type="ffprobe:errorType"   minOccurs="0" maxOccurs="1" />
 | 
			
		||||
            <xsd:element name="program_version"  type="ffprobe:programVersionType"  minOccurs="0" maxOccurs="1" />
 | 
			
		||||
            <xsd:element name="library_versions" type="ffprobe:libraryVersionsType" minOccurs="0" maxOccurs="1" />
 | 
			
		||||
        </xsd:sequence>
 | 
			
		||||
    </xsd:complexType>
 | 
			
		||||
 | 
			
		||||
    <xsd:complexType name="packetsType">
 | 
			
		||||
        <xsd:sequence>
 | 
			
		||||
            <xsd:element name="packet" type="ffprobe:packetType" minOccurs="0" maxOccurs="unbounded"/>
 | 
			
		||||
        </xsd:sequence>
 | 
			
		||||
    </xsd:complexType>
 | 
			
		||||
 | 
			
		||||
    <xsd:complexType name="framesType">
 | 
			
		||||
        <xsd:sequence>
 | 
			
		||||
            <xsd:element name="frame" type="ffprobe:frameType" minOccurs="0" maxOccurs="unbounded"/>
 | 
			
		||||
        </xsd:sequence>
 | 
			
		||||
    </xsd:complexType>
 | 
			
		||||
 | 
			
		||||
    <xsd:complexType name="packetType">
 | 
			
		||||
      <xsd:attribute name="codec_type"    type="xsd:string" use="required" />
 | 
			
		||||
      <xsd:attribute name="stream_index"  type="xsd:int" use="required" />
 | 
			
		||||
      <xsd:attribute name="pts"           type="xsd:long"  />
 | 
			
		||||
      <xsd:attribute name="pts_time"      type="xsd:float" />
 | 
			
		||||
      <xsd:attribute name="dts"           type="xsd:long"  />
 | 
			
		||||
      <xsd:attribute name="dts_time"      type="xsd:float" />
 | 
			
		||||
      <xsd:attribute name="duration"      type="xsd:long"  />
 | 
			
		||||
      <xsd:attribute name="duration_time" type="xsd:float" />
 | 
			
		||||
      <xsd:attribute name="convergence_duration"      type="xsd:long"  />
 | 
			
		||||
      <xsd:attribute name="convergence_duration_time" type="xsd:float" />
 | 
			
		||||
      <xsd:attribute name="size"          type="xsd:long" use="required" />
 | 
			
		||||
      <xsd:attribute name="pos"           type="xsd:long"  />
 | 
			
		||||
      <xsd:attribute name="flags"         type="xsd:string" use="required" />
 | 
			
		||||
      <xsd:attribute name="data"          type="xsd:string" />
 | 
			
		||||
    </xsd:complexType>
 | 
			
		||||
 | 
			
		||||
    <xsd:complexType name="frameType">
 | 
			
		||||
      <xsd:attribute name="media_type"    type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="key_frame"     type="xsd:int"    use="required"/>
 | 
			
		||||
      <xsd:attribute name="pts"           type="xsd:long" />
 | 
			
		||||
      <xsd:attribute name="pts_time"      type="xsd:float"/>
 | 
			
		||||
      <xsd:attribute name="pkt_pts"       type="xsd:long" />
 | 
			
		||||
      <xsd:attribute name="pkt_pts_time"  type="xsd:float"/>
 | 
			
		||||
      <xsd:attribute name="pkt_dts"       type="xsd:long" />
 | 
			
		||||
      <xsd:attribute name="pkt_dts_time"  type="xsd:float"/>
 | 
			
		||||
      <xsd:attribute name="pkt_duration"  type="xsd:long" />
 | 
			
		||||
      <xsd:attribute name="pkt_duration_time" type="xsd:float"/>
 | 
			
		||||
      <xsd:attribute name="pkt_pos"       type="xsd:long" />
 | 
			
		||||
      <xsd:attribute name="pkt_size"      type="xsd:int" />
 | 
			
		||||
 | 
			
		||||
      <!-- audio attributes -->
 | 
			
		||||
      <xsd:attribute name="sample_fmt"             type="xsd:string"/>
 | 
			
		||||
      <xsd:attribute name="nb_samples"             type="xsd:long"  />
 | 
			
		||||
      <xsd:attribute name="channels"               type="xsd:int"   />
 | 
			
		||||
      <xsd:attribute name="channel_layout"         type="xsd:string"/>
 | 
			
		||||
 | 
			
		||||
      <!-- video attributes -->
 | 
			
		||||
      <xsd:attribute name="width"                  type="xsd:long"  />
 | 
			
		||||
      <xsd:attribute name="height"                 type="xsd:long"  />
 | 
			
		||||
      <xsd:attribute name="pix_fmt"                type="xsd:string"/>
 | 
			
		||||
      <xsd:attribute name="sample_aspect_ratio"    type="xsd:string"/>
 | 
			
		||||
      <xsd:attribute name="pict_type"              type="xsd:string"/>
 | 
			
		||||
      <xsd:attribute name="coded_picture_number"   type="xsd:long"  />
 | 
			
		||||
      <xsd:attribute name="display_picture_number" type="xsd:long"  />
 | 
			
		||||
      <xsd:attribute name="interlaced_frame"       type="xsd:int"   />
 | 
			
		||||
      <xsd:attribute name="top_field_first"        type="xsd:int"   />
 | 
			
		||||
      <xsd:attribute name="repeat_pict"            type="xsd:int"   />
 | 
			
		||||
      <xsd:attribute name="reference"              type="xsd:int"   />
 | 
			
		||||
    </xsd:complexType>
 | 
			
		||||
 | 
			
		||||
    <xsd:complexType name="streamsType">
 | 
			
		||||
        <xsd:sequence>
 | 
			
		||||
            <xsd:element name="stream" type="ffprobe:streamType" minOccurs="0" maxOccurs="unbounded"/>
 | 
			
		||||
        </xsd:sequence>
 | 
			
		||||
    </xsd:complexType>
 | 
			
		||||
 | 
			
		||||
    <xsd:complexType name="streamDispositionType">
 | 
			
		||||
      <xsd:attribute name="default"          type="xsd:int" use="required" />
 | 
			
		||||
      <xsd:attribute name="dub"              type="xsd:int" use="required" />
 | 
			
		||||
      <xsd:attribute name="original"         type="xsd:int" use="required" />
 | 
			
		||||
      <xsd:attribute name="comment"          type="xsd:int" use="required" />
 | 
			
		||||
      <xsd:attribute name="lyrics"           type="xsd:int" use="required" />
 | 
			
		||||
      <xsd:attribute name="karaoke"          type="xsd:int" use="required" />
 | 
			
		||||
      <xsd:attribute name="forced"           type="xsd:int" use="required" />
 | 
			
		||||
      <xsd:attribute name="hearing_impaired" type="xsd:int" use="required" />
 | 
			
		||||
      <xsd:attribute name="visual_impaired"  type="xsd:int" use="required" />
 | 
			
		||||
      <xsd:attribute name="clean_effects"    type="xsd:int" use="required" />
 | 
			
		||||
      <xsd:attribute name="attached_pic"     type="xsd:int" use="required" />
 | 
			
		||||
    </xsd:complexType>
 | 
			
		||||
 | 
			
		||||
    <xsd:complexType name="streamType">
 | 
			
		||||
      <xsd:sequence>
 | 
			
		||||
        <xsd:element name="tag" type="ffprobe:tagType" minOccurs="0" maxOccurs="unbounded"/>
 | 
			
		||||
        <xsd:element name="disposition" type="ffprobe:streamDispositionType" minOccurs="0" maxOccurs="1"/>
 | 
			
		||||
      </xsd:sequence>
 | 
			
		||||
 | 
			
		||||
      <xsd:attribute name="index"            type="xsd:int" use="required"/>
 | 
			
		||||
      <xsd:attribute name="codec_name"       type="xsd:string" />
 | 
			
		||||
      <xsd:attribute name="codec_long_name"  type="xsd:string" />
 | 
			
		||||
      <xsd:attribute name="profile"          type="xsd:string" />
 | 
			
		||||
      <xsd:attribute name="codec_type"       type="xsd:string" />
 | 
			
		||||
      <xsd:attribute name="codec_time_base"  type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="codec_tag"        type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="codec_tag_string" type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="extradata"        type="xsd:string" />
 | 
			
		||||
 | 
			
		||||
      <!-- video attributes -->
 | 
			
		||||
      <xsd:attribute name="width"                type="xsd:int"/>
 | 
			
		||||
      <xsd:attribute name="height"               type="xsd:int"/>
 | 
			
		||||
      <xsd:attribute name="has_b_frames"         type="xsd:int"/>
 | 
			
		||||
      <xsd:attribute name="sample_aspect_ratio"  type="xsd:string"/>
 | 
			
		||||
      <xsd:attribute name="display_aspect_ratio" type="xsd:string"/>
 | 
			
		||||
      <xsd:attribute name="pix_fmt"              type="xsd:string"/>
 | 
			
		||||
      <xsd:attribute name="level"                type="xsd:int"/>
 | 
			
		||||
      <xsd:attribute name="timecode"             type="xsd:string"/>
 | 
			
		||||
 | 
			
		||||
      <!-- audio attributes -->
 | 
			
		||||
      <xsd:attribute name="sample_fmt"       type="xsd:string"/>
 | 
			
		||||
      <xsd:attribute name="sample_rate"      type="xsd:int"/>
 | 
			
		||||
      <xsd:attribute name="channels"         type="xsd:int"/>
 | 
			
		||||
      <xsd:attribute name="bits_per_sample"  type="xsd:int"/>
 | 
			
		||||
 | 
			
		||||
      <xsd:attribute name="id"               type="xsd:string"/>
 | 
			
		||||
      <xsd:attribute name="r_frame_rate"     type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="avg_frame_rate"   type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="time_base"        type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="start_pts"        type="xsd:long"/>
 | 
			
		||||
      <xsd:attribute name="start_time"       type="xsd:float"/>
 | 
			
		||||
      <xsd:attribute name="duration_ts"      type="xsd:long"/>
 | 
			
		||||
      <xsd:attribute name="duration"         type="xsd:float"/>
 | 
			
		||||
      <xsd:attribute name="bit_rate"         type="xsd:int"/>
 | 
			
		||||
      <xsd:attribute name="nb_frames"        type="xsd:int"/>
 | 
			
		||||
      <xsd:attribute name="nb_read_frames"   type="xsd:int"/>
 | 
			
		||||
      <xsd:attribute name="nb_read_packets"  type="xsd:int"/>
 | 
			
		||||
    </xsd:complexType>
 | 
			
		||||
 | 
			
		||||
    <xsd:complexType name="formatType">
 | 
			
		||||
      <xsd:sequence>
 | 
			
		||||
        <xsd:element name="tag" type="ffprobe:tagType" minOccurs="0" maxOccurs="unbounded"/>
 | 
			
		||||
      </xsd:sequence>
 | 
			
		||||
 | 
			
		||||
      <xsd:attribute name="filename"         type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="nb_streams"       type="xsd:int"    use="required"/>
 | 
			
		||||
      <xsd:attribute name="format_name"      type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="format_long_name" type="xsd:string"/>
 | 
			
		||||
      <xsd:attribute name="start_time"       type="xsd:float"/>
 | 
			
		||||
      <xsd:attribute name="duration"         type="xsd:float"/>
 | 
			
		||||
      <xsd:attribute name="size"             type="xsd:long"/>
 | 
			
		||||
      <xsd:attribute name="bit_rate"         type="xsd:long"/>
 | 
			
		||||
    </xsd:complexType>
 | 
			
		||||
 | 
			
		||||
    <xsd:complexType name="tagType">
 | 
			
		||||
      <xsd:attribute name="key"   type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="value" type="xsd:string" use="required"/>
 | 
			
		||||
    </xsd:complexType>
 | 
			
		||||
 | 
			
		||||
    <xsd:complexType name="errorType">
 | 
			
		||||
      <xsd:attribute name="code"   type="xsd:int"    use="required"/>
 | 
			
		||||
      <xsd:attribute name="string" type="xsd:string" use="required"/>
 | 
			
		||||
    </xsd:complexType>
 | 
			
		||||
 | 
			
		||||
    <xsd:complexType name="programVersionType">
 | 
			
		||||
      <xsd:attribute name="version"          type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="copyright"        type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="build_date"       type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="build_time"       type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="compiler_type"    type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="compiler_version" type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="configuration"    type="xsd:string" use="required"/>
 | 
			
		||||
    </xsd:complexType>
 | 
			
		||||
 | 
			
		||||
    <xsd:complexType name="libraryVersionType">
 | 
			
		||||
      <xsd:attribute name="name"        type="xsd:string" use="required"/>
 | 
			
		||||
      <xsd:attribute name="major"       type="xsd:int"    use="required"/>
 | 
			
		||||
      <xsd:attribute name="minor"       type="xsd:int"    use="required"/>
 | 
			
		||||
      <xsd:attribute name="micro"       type="xsd:int"    use="required"/>
 | 
			
		||||
      <xsd:attribute name="version"     type="xsd:int"    use="required"/>
 | 
			
		||||
      <xsd:attribute name="ident"       type="xsd:string" use="required"/>
 | 
			
		||||
    </xsd:complexType>
 | 
			
		||||
 | 
			
		||||
    <xsd:complexType name="libraryVersionsType">
 | 
			
		||||
        <xsd:sequence>
 | 
			
		||||
          <xsd:element name="library_version" type="ffprobe:libraryVersionType" minOccurs="0" maxOccurs="unbounded"/>
 | 
			
		||||
        </xsd:sequence>
 | 
			
		||||
    </xsd:complexType>
 | 
			
		||||
</xsd:schema>
 | 
			
		||||
@@ -1,35 +1,34 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle ffserver Documentation
 | 
			
		||||
@settitle FFserver Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{ffserver Documentation}
 | 
			
		||||
@sp 7
 | 
			
		||||
@center @titlefont{FFserver Documentation}
 | 
			
		||||
@sp 3
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
@chapter Introduction
 | 
			
		||||
 | 
			
		||||
@chapter Synopsis
 | 
			
		||||
 | 
			
		||||
ffserver [@var{options}]
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
ffserver is a streaming server for both audio and video. It supports
 | 
			
		||||
 | 
			
		||||
FFserver is a streaming server for both audio and video. It supports
 | 
			
		||||
several live feeds, streaming from files and time shifting on live feeds
 | 
			
		||||
(you can seek to positions in the past on each live feed, provided you
 | 
			
		||||
specify a big enough feed storage in ffserver.conf).
 | 
			
		||||
 | 
			
		||||
FFserver runs in daemon mode by default; that is, it puts itself in
 | 
			
		||||
the background and detaches from its TTY, unless it is launched in
 | 
			
		||||
debug mode or a NoDaemon option is specified in the configuration
 | 
			
		||||
file.
 | 
			
		||||
 | 
			
		||||
This documentation covers only the streaming aspects of ffserver /
 | 
			
		||||
ffmpeg. All questions about parameters for ffmpeg, codec questions,
 | 
			
		||||
etc. are not covered here. Read @file{ffmpeg.html} for more
 | 
			
		||||
etc. are not covered here. Read @file{ffmpeg-doc.html} for more
 | 
			
		||||
information.
 | 
			
		||||
 | 
			
		||||
@section How does it work?
 | 
			
		||||
 | 
			
		||||
ffserver receives prerecorded files or FFM streams from some ffmpeg
 | 
			
		||||
FFserver receives prerecorded files or FFM streams from some ffmpeg
 | 
			
		||||
instance as input, then streams them over RTP/RTSP/HTTP.
 | 
			
		||||
 | 
			
		||||
An ffserver instance will listen on some port as specified in the
 | 
			
		||||
@@ -47,7 +46,7 @@ file.
 | 
			
		||||
 | 
			
		||||
@section Status stream
 | 
			
		||||
 | 
			
		||||
ffserver supports an HTTP interface which exposes the current status
 | 
			
		||||
FFserver supports an HTTP interface which exposes the current status
 | 
			
		||||
of the server.
 | 
			
		||||
 | 
			
		||||
Simply point your browser to the address of the special status stream
 | 
			
		||||
@@ -81,7 +80,7 @@ to make it work correctly.
 | 
			
		||||
 | 
			
		||||
@section What do I need?
 | 
			
		||||
 | 
			
		||||
I use Linux on a 900 MHz Duron with a cheap Bt848 based TV capture card. I'm
 | 
			
		||||
I use Linux on a 900 MHz Duron with a cheapo Bt848 based TV capture card. I'm
 | 
			
		||||
using stock Linux 2.4.17 with the stock drivers. [Actually that isn't true,
 | 
			
		||||
I needed some special drivers for my motherboard-based sound card.]
 | 
			
		||||
 | 
			
		||||
@@ -100,8 +99,8 @@ As a simple test, just run the following two command lines where INPUTFILE
 | 
			
		||||
is some file which you can decode with ffmpeg:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffserver -f doc/ffserver.conf &
 | 
			
		||||
ffmpeg -i INPUTFILE http://localhost:8090/feed1.ffm
 | 
			
		||||
./ffserver -f doc/ffserver.conf &
 | 
			
		||||
./ffmpeg -i INPUTFILE http://localhost:8090/feed1.ffm
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
At this point you should be able to go to your Windows machine and fire up
 | 
			
		||||
@@ -136,7 +135,7 @@ that only captures in stereo and also requires that one channel be flipped.
 | 
			
		||||
If you are one of these people, then export 'AUDIO_FLIP_LEFT=1' before
 | 
			
		||||
starting ffmpeg.
 | 
			
		||||
 | 
			
		||||
@subsection The audio and video lose sync after a while.
 | 
			
		||||
@subsection The audio and video loose sync after a while.
 | 
			
		||||
 | 
			
		||||
Yes, they do.
 | 
			
		||||
 | 
			
		||||
@@ -227,23 +226,18 @@ You use this by adding the ?date= to the end of the URL for the stream.
 | 
			
		||||
For example:   @samp{http://localhost:8080/test.asf?date=2002-07-26T23:05:00}.
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@section What is FFM, FFM2
 | 
			
		||||
@chapter Invocation
 | 
			
		||||
@section Syntax
 | 
			
		||||
@example
 | 
			
		||||
@c man begin SYNOPSIS
 | 
			
		||||
ffserver [options]
 | 
			
		||||
@c man end
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
FFM and FFM2 are formats used by ffserver. They allow storing a wide variety of
 | 
			
		||||
video and audio streams and encoding options, and can store a moving time segment
 | 
			
		||||
of an infinite movie or a whole movie.
 | 
			
		||||
 | 
			
		||||
FFM is version specific, and there is limited compatibility of FFM files
 | 
			
		||||
generated by one version of ffmpeg/ffserver and another version of
 | 
			
		||||
ffmpeg/ffserver. It may work but its not guaranteed to work.
 | 
			
		||||
 | 
			
		||||
FFM2 is extensible while maintaining compatibility and should work between
 | 
			
		||||
differing versions of tools. FFM2 is the default.
 | 
			
		||||
 | 
			
		||||
@chapter Options
 | 
			
		||||
@section Options
 | 
			
		||||
@c man begin OPTIONS
 | 
			
		||||
 | 
			
		||||
@include avtools-common-opts.texi
 | 
			
		||||
@include fftools-common-opts.texi
 | 
			
		||||
 | 
			
		||||
@section Main options
 | 
			
		||||
 | 
			
		||||
@@ -252,43 +246,28 @@ differing versions of tools. FFM2 is the default.
 | 
			
		||||
Use @file{configfile} instead of @file{/etc/ffserver.conf}.
 | 
			
		||||
@item -n
 | 
			
		||||
Enable no-launch mode. This option disables all the Launch directives
 | 
			
		||||
within the various <Stream> sections. Since ffserver will not launch
 | 
			
		||||
any ffmpeg instances, you will have to launch them manually.
 | 
			
		||||
within the various <Stream> sections. FFserver will not launch any
 | 
			
		||||
ffmpeg instance, so you will have to launch them manually.
 | 
			
		||||
@item -d
 | 
			
		||||
Enable debug mode. This option increases log verbosity, directs log
 | 
			
		||||
messages to stdout.
 | 
			
		||||
messages to stdout and causes ffserver to run in the foreground
 | 
			
		||||
rather than as a daemon.
 | 
			
		||||
@end table
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
The @file{doc/ffserver.conf} example,
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe},
 | 
			
		||||
@url{ffmpeg-utils.html,ffmpeg-utils},
 | 
			
		||||
@url{ffmpeg-scaler.html,ffmpeg-scaler},
 | 
			
		||||
@url{ffmpeg-resampler.html,ffmpeg-resampler},
 | 
			
		||||
@url{ffmpeg-codecs.html,ffmpeg-codecs},
 | 
			
		||||
@url{ffmpeg-bitstream-filters,ffmpeg-bitstream-filters},
 | 
			
		||||
@url{ffmpeg-formats.html,ffmpeg-formats},
 | 
			
		||||
@url{ffmpeg-devices.html,ffmpeg-devices},
 | 
			
		||||
@url{ffmpeg-protocols.html,ffmpeg-protocols},
 | 
			
		||||
@url{ffmpeg-filters.html,ffmpeg-filters}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
The @file{doc/ffserver.conf} example, ffmpeg(1), ffplay(1), ffprobe(1),
 | 
			
		||||
ffmpeg-utils(1), ffmpeg-scaler(1), ffmpeg-resampler(1),
 | 
			
		||||
ffmpeg-codecs(1), ffmpeg-bitstream-filters(1), ffmpeg-formats(1),
 | 
			
		||||
ffmpeg-devices(1), ffmpeg-protocols(1), ffmpeg-filters(1)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename ffserver
 | 
			
		||||
@settitle ffserver video server
 | 
			
		||||
@settitle FFserver video server
 | 
			
		||||
 | 
			
		||||
@c man begin SEEALSO
 | 
			
		||||
ffmpeg(1), ffplay(1), the @file{ffmpeg/doc/ffserver.conf} example and
 | 
			
		||||
the HTML documentation of @file{ffmpeg}.
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@c man begin AUTHOR
 | 
			
		||||
Fabrice Bellard
 | 
			
		||||
@c man end
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@@ -25,6 +25,10 @@ MaxBandwidth 1000
 | 
			
		||||
# '-' is the standard output.
 | 
			
		||||
CustomLog -
 | 
			
		||||
 | 
			
		||||
# Suppress that if you want to launch ffserver as a daemon.
 | 
			
		||||
NoDaemon
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
##################################################################
 | 
			
		||||
# Definition of the live feeds. Each live feed contains one video
 | 
			
		||||
# and/or audio sequence coming from an ffmpeg encoder or another
 | 
			
		||||
@@ -302,27 +306,6 @@ StartSendOnKey
 | 
			
		||||
#</Stream>
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
# Transcode an incoming live feed to another live feed,
 | 
			
		||||
# using libx264 and video presets
 | 
			
		||||
 | 
			
		||||
#<Stream live.h264>
 | 
			
		||||
#Format rtp
 | 
			
		||||
#Feed feed1.ffm
 | 
			
		||||
#VideoCodec libx264
 | 
			
		||||
#VideoFrameRate 24
 | 
			
		||||
#VideoBitRate 100
 | 
			
		||||
#VideoSize 480x272
 | 
			
		||||
#AVPresetVideo default
 | 
			
		||||
#AVPresetVideo baseline
 | 
			
		||||
#AVOptionVideo flags +global_header
 | 
			
		||||
#
 | 
			
		||||
#AudioCodec libfaac
 | 
			
		||||
#AudioBitRate 32
 | 
			
		||||
#AudioChannels 2
 | 
			
		||||
#AudioSampleRate 22050
 | 
			
		||||
#AVOptionAudio flags +global_header
 | 
			
		||||
#</Stream>
 | 
			
		||||
 | 
			
		||||
##################################################################
 | 
			
		||||
# SDP/multicast examples
 | 
			
		||||
#
 | 
			
		||||
@@ -369,3 +352,5 @@ ACL allow 192.168.0.0 192.168.255.255
 | 
			
		||||
<Redirect index.html>
 | 
			
		||||
URL http://www.ffmpeg.org/
 | 
			
		||||
</Redirect>
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 
 | 
			
		||||
							
								
								
									
										72
									
								
								doc/fftools-common-opts.texi
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										72
									
								
								doc/fftools-common-opts.texi
									
									
									
									
									
										Normal file
									
								
							@@ -0,0 +1,72 @@
 | 
			
		||||
@section Generic options
 | 
			
		||||
 | 
			
		||||
These options are shared amongst the ff* tools.
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item -L
 | 
			
		||||
Show license.
 | 
			
		||||
 | 
			
		||||
@item -h, -?, -help, --help
 | 
			
		||||
Show help.
 | 
			
		||||
 | 
			
		||||
@item -version
 | 
			
		||||
Show version.
 | 
			
		||||
 | 
			
		||||
@item -formats
 | 
			
		||||
Show available formats.
 | 
			
		||||
 | 
			
		||||
The fields preceding the format names have the following meanings:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item D
 | 
			
		||||
Decoding available
 | 
			
		||||
@item E
 | 
			
		||||
Encoding available
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item -codecs
 | 
			
		||||
Show available codecs.
 | 
			
		||||
 | 
			
		||||
The fields preceding the codec names have the following meanings:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item D
 | 
			
		||||
Decoding available
 | 
			
		||||
@item E
 | 
			
		||||
Encoding available
 | 
			
		||||
@item V/A/S
 | 
			
		||||
Video/audio/subtitle codec
 | 
			
		||||
@item S
 | 
			
		||||
Codec supports slices
 | 
			
		||||
@item D
 | 
			
		||||
Codec supports direct rendering
 | 
			
		||||
@item T
 | 
			
		||||
Codec can handle input truncated at random locations instead of only at frame boundaries
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@item -bsfs
 | 
			
		||||
Show available bitstream filters.
 | 
			
		||||
 | 
			
		||||
@item -protocols
 | 
			
		||||
Show available protocols.
 | 
			
		||||
 | 
			
		||||
@item -filters
 | 
			
		||||
Show available libavfilter filters.
 | 
			
		||||
 | 
			
		||||
@item -pix_fmts
 | 
			
		||||
Show available pixel formats.
 | 
			
		||||
 | 
			
		||||
@item -loglevel @var{loglevel}
 | 
			
		||||
Set the logging level used by the library.
 | 
			
		||||
@var{loglevel} is a number or a string containing one of the following values:
 | 
			
		||||
@table @samp
 | 
			
		||||
@item quiet
 | 
			
		||||
@item panic
 | 
			
		||||
@item fatal
 | 
			
		||||
@item error
 | 
			
		||||
@item warning
 | 
			
		||||
@item info
 | 
			
		||||
@item verbose
 | 
			
		||||
@item debug
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
@@ -1,269 +0,0 @@
 | 
			
		||||
Filter design
 | 
			
		||||
=============
 | 
			
		||||
 | 
			
		||||
This document explains guidelines that should be observed (or ignored with
 | 
			
		||||
good reason) when writing filters for libavfilter.
 | 
			
		||||
 | 
			
		||||
In this document, the word “frame” indicates either a video frame or a group
 | 
			
		||||
of audio samples, as stored in an AVFilterBuffer structure.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
Format negotiation
 | 
			
		||||
==================
 | 
			
		||||
 | 
			
		||||
  The query_formats method should set, for each input and each output links,
 | 
			
		||||
  the list of supported formats.
 | 
			
		||||
 | 
			
		||||
  For video links, that means pixel format. For audio links, that means
 | 
			
		||||
  channel layout, and sample format (the sample packing is implied by the
 | 
			
		||||
  sample format).
 | 
			
		||||
 | 
			
		||||
  The lists are not just lists, they are references to shared objects. When
 | 
			
		||||
  the negotiation mechanism computes the intersection of the formats
 | 
			
		||||
  supported at each ends of a link, all references to both lists are
 | 
			
		||||
  replaced with a reference to the intersection. And when a single format is
 | 
			
		||||
  eventually chosen for a link amongst the remaining list, again, all
 | 
			
		||||
  references to the list are updated.
 | 
			
		||||
 | 
			
		||||
  That means that if a filter requires that its input and output have the
 | 
			
		||||
  same format amongst a supported list, all it has to do is use a reference
 | 
			
		||||
  to the same list of formats.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
Buffer references ownership and permissions
 | 
			
		||||
===========================================
 | 
			
		||||
 | 
			
		||||
  Principle
 | 
			
		||||
  ---------
 | 
			
		||||
 | 
			
		||||
    Audio and video data are voluminous; the buffer and buffer reference
 | 
			
		||||
    mechanism is intended to avoid, as much as possible, expensive copies of
 | 
			
		||||
    that data while still allowing the filters to produce correct results.
 | 
			
		||||
 | 
			
		||||
    The data is stored in buffers represented by AVFilterBuffer structures.
 | 
			
		||||
    They must not be accessed directly, but through references stored in
 | 
			
		||||
    AVFilterBufferRef structures. Several references can point to the
 | 
			
		||||
    same buffer; the buffer is automatically deallocated once all
 | 
			
		||||
    corresponding references have been destroyed.
 | 
			
		||||
 | 
			
		||||
    The characteristics of the data (resolution, sample rate, etc.) are
 | 
			
		||||
    stored in the reference; different references for the same buffer can
 | 
			
		||||
    show different characteristics. In particular, a video reference can
 | 
			
		||||
    point to only a part of a video buffer.
 | 
			
		||||
 | 
			
		||||
    A reference is usually obtained as input to the start_frame or
 | 
			
		||||
    filter_frame method or requested using the ff_get_video_buffer or
 | 
			
		||||
    ff_get_audio_buffer functions. A new reference on an existing buffer can
 | 
			
		||||
    be created with the avfilter_ref_buffer. A reference is destroyed using
 | 
			
		||||
    the avfilter_unref_bufferp function.
 | 
			
		||||
 | 
			
		||||
  Reference ownership
 | 
			
		||||
  -------------------
 | 
			
		||||
 | 
			
		||||
    At any time, a reference “belongs” to a particular piece of code,
 | 
			
		||||
    usually a filter. With a few caveats that will be explained below, only
 | 
			
		||||
    that piece of code is allowed to access it. It is also responsible for
 | 
			
		||||
    destroying it, although this is sometimes done automatically (see the
 | 
			
		||||
    section on link reference fields).
 | 
			
		||||
 | 
			
		||||
    Here are the (fairly obvious) rules for reference ownership:
 | 
			
		||||
 | 
			
		||||
    * A reference received by the start_frame or filter_frame method
 | 
			
		||||
      belong to the corresponding filter.
 | 
			
		||||
 | 
			
		||||
      Special exception: for video references: the reference may be used
 | 
			
		||||
      internally for automatic copying and must not be destroyed before
 | 
			
		||||
      end_frame; it can be given away to ff_start_frame.
 | 
			
		||||
 | 
			
		||||
    * A reference passed to ff_start_frame or ff_filter_frame is given
 | 
			
		||||
      away and must no longer be used.
 | 
			
		||||
 | 
			
		||||
    * A reference created with avfilter_ref_buffer belongs to the code that
 | 
			
		||||
      created it.
 | 
			
		||||
 | 
			
		||||
    * A reference obtained with ff_get_video_buffer or ff_get_audio_buffer
 | 
			
		||||
      belongs to the code that requested it.
 | 
			
		||||
 | 
			
		||||
    * A reference given as return value by the get_video_buffer or
 | 
			
		||||
      get_audio_buffer method is given away and must no longer be used.
 | 
			
		||||
 | 
			
		||||
  Link reference fields
 | 
			
		||||
  ---------------------
 | 
			
		||||
 | 
			
		||||
    The AVFilterLink structure has a few AVFilterBufferRef fields. Here are
 | 
			
		||||
    the rules to handle them:
 | 
			
		||||
 | 
			
		||||
    * cur_buf is set before the start_frame and filter_frame methods to
 | 
			
		||||
      the same reference given as argument to the methods and belongs to the
 | 
			
		||||
      destination filter of the link. If it has not been cleared after
 | 
			
		||||
      end_frame or filter_frame, libavfilter will automatically destroy
 | 
			
		||||
      the reference; therefore, any filter that needs to keep the reference
 | 
			
		||||
      for longer must set cur_buf to NULL.
 | 
			
		||||
 | 
			
		||||
    * out_buf belongs to the source filter of the link and can be used to
 | 
			
		||||
      store a reference to the buffer that has been sent to the destination.
 | 
			
		||||
      If it is not NULL after end_frame or filter_frame, libavfilter will
 | 
			
		||||
      automatically destroy the reference.
 | 
			
		||||
 | 
			
		||||
      If a video input pad does not have a start_frame method, the default
 | 
			
		||||
      method will request a buffer on the first output of the filter, store
 | 
			
		||||
      the reference in out_buf and push a second reference to the output.
 | 
			
		||||
 | 
			
		||||
    * src_buf, cur_buf_copy and partial_buf are used by libavfilter
 | 
			
		||||
      internally and must not be accessed by filters.
 | 
			
		||||
 | 
			
		||||
  Reference permissions
 | 
			
		||||
  ---------------------
 | 
			
		||||
 | 
			
		||||
    The AVFilterBufferRef structure has a perms field that describes what
 | 
			
		||||
    the code that owns the reference is allowed to do to the buffer data.
 | 
			
		||||
    Different references for the same buffer can have different permissions.
 | 
			
		||||
 | 
			
		||||
    For video filters, the permissions only apply to the parts of the buffer
 | 
			
		||||
    that have already been covered by the draw_slice method.
 | 
			
		||||
 | 
			
		||||
    The value is a binary OR of the following constants:
 | 
			
		||||
 | 
			
		||||
    * AV_PERM_READ: the owner can read the buffer data; this is essentially
 | 
			
		||||
      always true and is there for self-documentation.
 | 
			
		||||
 | 
			
		||||
    * AV_PERM_WRITE: the owner can modify the buffer data.
 | 
			
		||||
 | 
			
		||||
    * AV_PERM_PRESERVE: the owner can rely on the fact that the buffer data
 | 
			
		||||
      will not be modified by previous filters.
 | 
			
		||||
 | 
			
		||||
    * AV_PERM_REUSE: the owner can output the buffer several times, without
 | 
			
		||||
      modifying the data in between.
 | 
			
		||||
 | 
			
		||||
    * AV_PERM_REUSE2: the owner can output the buffer several times and
 | 
			
		||||
      modify the data in between (useless without the WRITE permissions).
 | 
			
		||||
 | 
			
		||||
    * AV_PERM_ALIGN: the owner can access the data using fast operations
 | 
			
		||||
      that require data alignment.
 | 
			
		||||
 | 
			
		||||
    The READ, WRITE and PRESERVE permissions are about sharing the same
 | 
			
		||||
    buffer between several filters to avoid expensive copies without them
 | 
			
		||||
    doing conflicting changes on the data.
 | 
			
		||||
 | 
			
		||||
    The REUSE and REUSE2 permissions are about special memory for direct
 | 
			
		||||
    rendering. For example a buffer directly allocated in video memory must
 | 
			
		||||
    not modified once it is displayed on screen, or it will cause tearing;
 | 
			
		||||
    it will therefore not have the REUSE2 permission.
 | 
			
		||||
 | 
			
		||||
    The ALIGN permission is about extracting part of the buffer, for
 | 
			
		||||
    copy-less padding or cropping for example.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
    References received on input pads are guaranteed to have all the
 | 
			
		||||
    permissions stated in the min_perms field and none of the permissions
 | 
			
		||||
    stated in the rej_perms.
 | 
			
		||||
 | 
			
		||||
    References obtained by ff_get_video_buffer and ff_get_audio_buffer are
 | 
			
		||||
    guaranteed to have at least all the permissions requested as argument.
 | 
			
		||||
 | 
			
		||||
    References created by avfilter_ref_buffer have the same permissions as
 | 
			
		||||
    the original reference minus the ones explicitly masked; the mask is
 | 
			
		||||
    usually ~0 to keep the same permissions.
 | 
			
		||||
 | 
			
		||||
    Filters should remove permissions on reference they give to output
 | 
			
		||||
    whenever necessary. It can be automatically done by setting the
 | 
			
		||||
    rej_perms field on the output pad.
 | 
			
		||||
 | 
			
		||||
    Here are a few guidelines corresponding to common situations:
 | 
			
		||||
 | 
			
		||||
    * Filters that modify and forward their frame (like drawtext) need the
 | 
			
		||||
      WRITE permission.
 | 
			
		||||
 | 
			
		||||
    * Filters that read their input to produce a new frame on output (like
 | 
			
		||||
      scale) need the READ permission on input and and must request a buffer
 | 
			
		||||
      with the WRITE permission.
 | 
			
		||||
 | 
			
		||||
    * Filters that intend to keep a reference after the filtering process
 | 
			
		||||
      is finished (after end_frame or filter_frame returns) must have the
 | 
			
		||||
      PRESERVE permission on it and remove the WRITE permission if they
 | 
			
		||||
      create a new reference to give it away.
 | 
			
		||||
 | 
			
		||||
    * Filters that intend to modify a reference they have kept after the end
 | 
			
		||||
      of the filtering process need the REUSE2 permission and must remove
 | 
			
		||||
      the PRESERVE permission if they create a new reference to give it
 | 
			
		||||
      away.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
Frame scheduling
 | 
			
		||||
================
 | 
			
		||||
 | 
			
		||||
  The purpose of these rules is to ensure that frames flow in the filter
 | 
			
		||||
  graph without getting stuck and accumulating somewhere.
 | 
			
		||||
 | 
			
		||||
  Simple filters that output one frame for each input frame should not have
 | 
			
		||||
  to worry about it.
 | 
			
		||||
 | 
			
		||||
  start_frame / filter_frame
 | 
			
		||||
  ----------------------------
 | 
			
		||||
 | 
			
		||||
    These methods are called when a frame is pushed to the filter's input.
 | 
			
		||||
    They can be called at any time except in a reentrant way.
 | 
			
		||||
 | 
			
		||||
    If the input frame is enough to produce output, then the filter should
 | 
			
		||||
    push the output frames on the output link immediately.
 | 
			
		||||
 | 
			
		||||
    As an exception to the previous rule, if the input frame is enough to
 | 
			
		||||
    produce several output frames, then the filter needs output only at
 | 
			
		||||
    least one per link. The additional frames can be left buffered in the
 | 
			
		||||
    filter; these buffered frames must be flushed immediately if a new input
 | 
			
		||||
    produces new output.
 | 
			
		||||
 | 
			
		||||
    (Example: framerate-doubling filter: start_frame must (1) flush the
 | 
			
		||||
    second copy of the previous frame, if it is still there, (2) push the
 | 
			
		||||
    first copy of the incoming frame, (3) keep the second copy for later.)
 | 
			
		||||
 | 
			
		||||
    If the input frame is not enough to produce output, the filter must not
 | 
			
		||||
    call request_frame to get more. It must just process the frame or queue
 | 
			
		||||
    it. The task of requesting more frames is left to the filter's
 | 
			
		||||
    request_frame method or the application.
 | 
			
		||||
 | 
			
		||||
    If a filter has several inputs, the filter must be ready for frames
 | 
			
		||||
    arriving randomly on any input. Therefore, any filter with several inputs
 | 
			
		||||
    will most likely require some kind of queuing mechanism. It is perfectly
 | 
			
		||||
    acceptable to have a limited queue and to drop frames when the inputs
 | 
			
		||||
    are too unbalanced.
 | 
			
		||||
 | 
			
		||||
  request_frame
 | 
			
		||||
  -------------
 | 
			
		||||
 | 
			
		||||
    This method is called when a frame is wanted on an output.
 | 
			
		||||
 | 
			
		||||
    For an input, it should directly call start_frame or filter_frame on
 | 
			
		||||
    the corresponding output.
 | 
			
		||||
 | 
			
		||||
    For a filter, if there are queued frames already ready, one of these
 | 
			
		||||
    frames should be pushed. If not, the filter should request a frame on
 | 
			
		||||
    one of its inputs, repeatedly until at least one frame has been pushed.
 | 
			
		||||
 | 
			
		||||
    Return values:
 | 
			
		||||
    if request_frame could produce a frame, it should return 0;
 | 
			
		||||
    if it could not for temporary reasons, it should return AVERROR(EAGAIN);
 | 
			
		||||
    if it could not because there are no more frames, it should return
 | 
			
		||||
    AVERROR_EOF.
 | 
			
		||||
 | 
			
		||||
    The typical implementation of request_frame for a filter with several
 | 
			
		||||
    inputs will look like that:
 | 
			
		||||
 | 
			
		||||
        if (frames_queued) {
 | 
			
		||||
            push_one_frame();
 | 
			
		||||
            return 0;
 | 
			
		||||
        }
 | 
			
		||||
        while (!frame_pushed) {
 | 
			
		||||
            input = input_where_a_frame_is_most_needed();
 | 
			
		||||
            ret = avfilter_request_frame(input);
 | 
			
		||||
            if (ret == AVERROR_EOF) {
 | 
			
		||||
                process_eof_on_input();
 | 
			
		||||
            } else if (ret < 0) {
 | 
			
		||||
                return ret;
 | 
			
		||||
            }
 | 
			
		||||
        }
 | 
			
		||||
        return 0;
 | 
			
		||||
 | 
			
		||||
    Note that, except for filters that can have queued frames, request_frame
 | 
			
		||||
    does not push frames: it requests them to its input, and as a reaction,
 | 
			
		||||
    the start_frame / filter_frame method will be called and do the work.
 | 
			
		||||
							
								
								
									
										5753
									
								
								doc/filters.texi
									
									
									
									
									
								
							
							
						
						
									
										5753
									
								
								doc/filters.texi
									
									
									
									
									
								
							
										
											
												File diff suppressed because it is too large
												Load Diff
											
										
									
								
							
							
								
								
									
										779
									
								
								doc/general.texi
									
									
									
									
									
								
							
							
						
						
									
										779
									
								
								doc/general.texi
									
									
									
									
									
								
							
										
											
												File diff suppressed because it is too large
												Load Diff
											
										
									
								
							@@ -1,415 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle Using git to develop FFmpeg
 | 
			
		||||
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{Using git to develop FFmpeg}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Introduction
 | 
			
		||||
 | 
			
		||||
This document aims in giving some quick references on a set of useful git
 | 
			
		||||
commands. You should always use the extensive and detailed documentation
 | 
			
		||||
provided directly by git:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git --help
 | 
			
		||||
man git
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
shows you the available subcommands,
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git <command> --help
 | 
			
		||||
man git-<command>
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
shows information about the subcommand <command>.
 | 
			
		||||
 | 
			
		||||
Additional information could be found on the
 | 
			
		||||
@url{http://gitref.org, Git Reference} website
 | 
			
		||||
 | 
			
		||||
For more information about the Git project, visit the
 | 
			
		||||
 | 
			
		||||
@url{http://git-scm.com/, Git website}
 | 
			
		||||
 | 
			
		||||
Consult these resources whenever you have problems, they are quite exhaustive.
 | 
			
		||||
 | 
			
		||||
What follows now is a basic introduction to Git and some FFmpeg-specific
 | 
			
		||||
guidelines to ease the contribution to the project
 | 
			
		||||
 | 
			
		||||
@chapter Basics Usage
 | 
			
		||||
 | 
			
		||||
@section Get GIT
 | 
			
		||||
 | 
			
		||||
You can get git from @url{http://git-scm.com/}
 | 
			
		||||
Most distribution and operating system provide a package for it.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@section Cloning the source tree
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git clone git://source.ffmpeg.org/ffmpeg <target>
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
This will put the FFmpeg sources into the directory @var{<target>}.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git clone git@@source.ffmpeg.org:ffmpeg <target>
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
This will put the FFmpeg sources into the directory @var{<target>} and let
 | 
			
		||||
you push back your changes to the remote repository.
 | 
			
		||||
 | 
			
		||||
Make sure that you do not have Windows line endings in your checkouts,
 | 
			
		||||
otherwise you may experience spurious compilation failures. One way to
 | 
			
		||||
achieve this is to run
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git config --global core.autocrlf false
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@section Updating the source tree to the latest revision
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git pull (--rebase)
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
pulls in the latest changes from the tracked branch. The tracked branch
 | 
			
		||||
can be remote. By default the master branch tracks the branch master in
 | 
			
		||||
the remote origin.
 | 
			
		||||
 | 
			
		||||
@float IMPORTANT
 | 
			
		||||
@command{--rebase} (see below) is recommended.
 | 
			
		||||
@end float
 | 
			
		||||
 | 
			
		||||
@section Rebasing your local branches
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git pull --rebase
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
fetches the changes from the main repository and replays your local commits
 | 
			
		||||
over it. This is required to keep all your local changes at the top of
 | 
			
		||||
FFmpeg's master tree. The master tree will reject pushes with merge commits.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@section Adding/removing files/directories
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git add [-A] <filename/dirname>
 | 
			
		||||
git rm [-r] <filename/dirname>
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
GIT needs to get notified of all changes you make to your working
 | 
			
		||||
directory that makes files appear or disappear.
 | 
			
		||||
Line moves across files are automatically tracked.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@section Showing modifications
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git diff <filename(s)>
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
will show all local modifications in your working directory as unified diff.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@section Inspecting the changelog
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git log <filename(s)>
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
You may also use the graphical tools like gitview or gitk or the web
 | 
			
		||||
interface available at http://source.ffmpeg.org/
 | 
			
		||||
 | 
			
		||||
@section Checking source tree status
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git status
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
detects all the changes you made and lists what actions will be taken in case
 | 
			
		||||
of a commit (additions, modifications, deletions, etc.).
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@section Committing
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git diff --check
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
to double check your changes before committing them to avoid trouble later
 | 
			
		||||
on. All experienced developers do this on each and every commit, no matter
 | 
			
		||||
how small.
 | 
			
		||||
Every one of them has been saved from looking like a fool by this many times.
 | 
			
		||||
It's very easy for stray debug output or cosmetic modifications to slip in,
 | 
			
		||||
please avoid problems through this extra level of scrutiny.
 | 
			
		||||
 | 
			
		||||
For cosmetics-only commits you should get (almost) empty output from
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git diff -w -b <filename(s)>
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Also check the output of
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git status
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
to make sure you don't have untracked files or deletions.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git add [-i|-p|-A] <filenames/dirnames>
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Make sure you have told git your name and email address
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git config --global user.name "My Name"
 | 
			
		||||
git config --global user.email my@@email.invalid
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Use @var{--global} to set the global configuration for all your git checkouts.
 | 
			
		||||
 | 
			
		||||
Git will select the changes to the files for commit. Optionally you can use
 | 
			
		||||
the interactive or the patch mode to select hunk by hunk what should be
 | 
			
		||||
added to the commit.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git commit
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Git will commit the selected changes to your current local branch.
 | 
			
		||||
 | 
			
		||||
You will be prompted for a log message in an editor, which is either
 | 
			
		||||
set in your personal configuration file through
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git config --global core.editor
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
or set by one of the following environment variables:
 | 
			
		||||
@var{GIT_EDITOR}, @var{VISUAL} or @var{EDITOR}.
 | 
			
		||||
 | 
			
		||||
Log messages should be concise but descriptive. Explain why you made a change,
 | 
			
		||||
what you did will be obvious from the changes themselves most of the time.
 | 
			
		||||
Saying just "bug fix" or "10l" is bad. Remember that people of varying skill
 | 
			
		||||
levels look at and educate themselves while reading through your code. Don't
 | 
			
		||||
include filenames in log messages, Git provides that information.
 | 
			
		||||
 | 
			
		||||
Possibly make the commit message have a terse, descriptive first line, an
 | 
			
		||||
empty line and then a full description. The first line will be used to name
 | 
			
		||||
the patch by git format-patch.
 | 
			
		||||
 | 
			
		||||
@section Preparing a patchset
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git format-patch <commit> [-o directory]
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
will generate a set of patches for each commit between @var{<commit>} and
 | 
			
		||||
current @var{HEAD}. E.g.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git format-patch origin/master
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
will generate patches for all commits on current branch which are not
 | 
			
		||||
present in upstream.
 | 
			
		||||
A useful shortcut is also
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git format-patch -n
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
which will generate patches from last @var{n} commits.
 | 
			
		||||
By default the patches are created in the current directory.
 | 
			
		||||
 | 
			
		||||
@section Sending patches for review
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git send-email <commit list|directory>
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
will send the patches created by @command{git format-patch} or directly
 | 
			
		||||
generates them. All the email fields can be configured in the global/local
 | 
			
		||||
configuration or overridden by command line.
 | 
			
		||||
Note that this tool must often be installed separately (e.g. @var{git-email}
 | 
			
		||||
package on Debian-based distros).
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@section Renaming/moving/copying files or contents of files
 | 
			
		||||
 | 
			
		||||
Git automatically tracks such changes, making those normal commits.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
mv/cp path/file otherpath/otherfile
 | 
			
		||||
git add [-A] .
 | 
			
		||||
git commit
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@chapter Git configuration
 | 
			
		||||
 | 
			
		||||
In order to simplify a few workflows, it is advisable to configure both
 | 
			
		||||
your personal Git installation and your local FFmpeg repository.
 | 
			
		||||
 | 
			
		||||
@section Personal Git installation
 | 
			
		||||
 | 
			
		||||
Add the following to your @file{~/.gitconfig} to help @command{git send-email}
 | 
			
		||||
and @command{git format-patch} detect renames:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
[diff]
 | 
			
		||||
        renames = copy
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section Repository configuration
 | 
			
		||||
 | 
			
		||||
In order to have @command{git send-email} automatically send patches
 | 
			
		||||
to the ffmpeg-devel mailing list, add the following stanza
 | 
			
		||||
to @file{/path/to/ffmpeg/repository/.git/config}:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
[sendemail]
 | 
			
		||||
        to = ffmpeg-devel@@ffmpeg.org
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@chapter FFmpeg specific
 | 
			
		||||
 | 
			
		||||
@section Reverting broken commits
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git reset <commit>
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@command{git reset} will uncommit the changes till @var{<commit>} rewriting
 | 
			
		||||
the current branch history.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git commit --amend
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
allows to amend the last commit details quickly.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git rebase -i origin/master
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
will replay local commits over the main repository allowing to edit, merge
 | 
			
		||||
or remove some of them in the process.
 | 
			
		||||
 | 
			
		||||
@float NOTE
 | 
			
		||||
@command{git reset}, @command{git commit --amend} and @command{git rebase}
 | 
			
		||||
rewrite history, so you should use them ONLY on your local or topic branches.
 | 
			
		||||
The main repository will reject those changes.
 | 
			
		||||
@end float
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git revert <commit>
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@command{git revert} will generate a revert commit. This will not make the
 | 
			
		||||
faulty commit disappear from the history.
 | 
			
		||||
 | 
			
		||||
@section Pushing changes to remote trees
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git push
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Will push the changes to the default remote (@var{origin}).
 | 
			
		||||
Git will prevent you from pushing changes if the local and remote trees are
 | 
			
		||||
out of sync. Refer to and to sync the local tree.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git remote add <name> <url>
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Will add additional remote with a name reference, it is useful if you want
 | 
			
		||||
to push your local branch for review on a remote host.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git push <remote> <refspec>
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Will push the changes to the @var{<remote>} repository.
 | 
			
		||||
Omitting @var{<refspec>} makes @command{git push} update all the remote
 | 
			
		||||
branches matching the local ones.
 | 
			
		||||
 | 
			
		||||
@section Finding a specific svn revision
 | 
			
		||||
 | 
			
		||||
Since version 1.7.1 git supports @var{:/foo} syntax for specifying commits
 | 
			
		||||
based on a regular expression. see man gitrevisions
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git show :/'as revision 23456'
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
will show the svn changeset @var{r23456}. With older git versions searching in
 | 
			
		||||
the @command{git log} output is the easiest option (especially if a pager with
 | 
			
		||||
search capabilities is used).
 | 
			
		||||
This commit can be checked out with
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git checkout -b svn_23456 :/'as revision 23456'
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
or for git < 1.7.1 with
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
git checkout -b svn_23456 $SHA1
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
where @var{$SHA1} is the commit hash from the @command{git log} output.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
@chapter pre-push checklist
 | 
			
		||||
 | 
			
		||||
Once you have a set of commits that you feel are ready for pushing,
 | 
			
		||||
work through the following checklist to doublecheck everything is in
 | 
			
		||||
proper order. This list tries to be exhaustive. In case you are just
 | 
			
		||||
pushing a typo in a comment, some of the steps may be unnecessary.
 | 
			
		||||
Apply your common sense, but if in doubt, err on the side of caution.
 | 
			
		||||
 | 
			
		||||
First, make sure that the commits and branches you are going to push
 | 
			
		||||
match what you want pushed and that nothing is missing, extraneous or
 | 
			
		||||
wrong. You can see what will be pushed by running the git push command
 | 
			
		||||
with --dry-run first. And then inspecting the commits listed with
 | 
			
		||||
@command{git log -p 1234567..987654}. The @command{git status} command
 | 
			
		||||
may help in finding local changes that have been forgotten to be added.
 | 
			
		||||
 | 
			
		||||
Next let the code pass through a full run of our testsuite.
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
@item @command{make distclean}
 | 
			
		||||
@item @command{/path/to/ffmpeg/configure}
 | 
			
		||||
@item @command{make check}
 | 
			
		||||
@item if fate fails due to missing samples run @command{make fate-rsync} and retry
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
Make sure all your changes have been checked before pushing them, the
 | 
			
		||||
testsuite only checks against regressions and that only to some extend. It does
 | 
			
		||||
obviously not check newly added features/code to be working unless you have
 | 
			
		||||
added a test for that (which is recommended).
 | 
			
		||||
 | 
			
		||||
Also note that every single commit should pass the test suite, not just
 | 
			
		||||
the result of a series of patches.
 | 
			
		||||
 | 
			
		||||
Once everything passed, push the changes to your public ffmpeg clone and post a
 | 
			
		||||
merge request to ffmpeg-devel. You can also push them directly but this is not
 | 
			
		||||
recommended.
 | 
			
		||||
 | 
			
		||||
@chapter Server Issues
 | 
			
		||||
 | 
			
		||||
Contact the project admins @email{root@@ffmpeg.org} if you have technical
 | 
			
		||||
problems with the GIT server.
 | 
			
		||||
@@ -1,273 +0,0 @@
 | 
			
		||||
 | 
			
		||||
About Git write access:
 | 
			
		||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 | 
			
		||||
 | 
			
		||||
Before everything else, you should know how to use GIT properly.
 | 
			
		||||
Luckily Git comes with excellent documentation.
 | 
			
		||||
 | 
			
		||||
  git --help
 | 
			
		||||
  man git
 | 
			
		||||
 | 
			
		||||
shows you the available subcommands,
 | 
			
		||||
 | 
			
		||||
  git <command> --help
 | 
			
		||||
  man git-<command>
 | 
			
		||||
 | 
			
		||||
shows information about the subcommand <command>.
 | 
			
		||||
 | 
			
		||||
The most comprehensive manual is the website Git Reference
 | 
			
		||||
 | 
			
		||||
http://gitref.org/
 | 
			
		||||
 | 
			
		||||
For more information about the Git project, visit
 | 
			
		||||
 | 
			
		||||
http://git-scm.com/
 | 
			
		||||
 | 
			
		||||
Consult these resources whenever you have problems, they are quite exhaustive.
 | 
			
		||||
 | 
			
		||||
You do not need a special username or password.
 | 
			
		||||
All you need is to provide a ssh public key to the Git server admin.
 | 
			
		||||
 | 
			
		||||
What follows now is a basic introduction to Git and some FFmpeg-specific
 | 
			
		||||
guidelines. Read it at least once, if you are granted commit privileges to the
 | 
			
		||||
FFmpeg project you are expected to be familiar with these rules.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
I. BASICS:
 | 
			
		||||
==========
 | 
			
		||||
 | 
			
		||||
0. Get GIT:
 | 
			
		||||
 | 
			
		||||
  Most distributions have a git package, if not
 | 
			
		||||
  You can get git from http://git-scm.com/
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
1. Cloning the source tree:
 | 
			
		||||
 | 
			
		||||
    git clone git://source.ffmpeg.org/ffmpeg <target>
 | 
			
		||||
 | 
			
		||||
  This will put the FFmpeg sources into the directory <target>.
 | 
			
		||||
 | 
			
		||||
    git clone git@source.ffmpeg.org:ffmpeg <target>
 | 
			
		||||
 | 
			
		||||
  This will put the FFmpeg sources into the directory <target> and let
 | 
			
		||||
  you push back your changes to the remote repository.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
2. Updating the source tree to the latest revision:
 | 
			
		||||
 | 
			
		||||
    git pull (--ff-only)
 | 
			
		||||
 | 
			
		||||
  pulls in the latest changes from the tracked branch. The tracked branch
 | 
			
		||||
  can be remote. By default the master branch tracks the branch master in
 | 
			
		||||
  the remote origin.
 | 
			
		||||
  Caveat: Since merge commits are forbidden at least for the initial
 | 
			
		||||
          months of git --ff-only or --rebase (see below) are recommended.
 | 
			
		||||
          --ff-only will fail and not create merge commits if your branch
 | 
			
		||||
          has diverged (has a different history) from the tracked branch.
 | 
			
		||||
 | 
			
		||||
2.a Rebasing your local branches:
 | 
			
		||||
 | 
			
		||||
    git pull --rebase
 | 
			
		||||
 | 
			
		||||
  fetches the changes from the main repository and replays your local commits
 | 
			
		||||
  over it. This is required to keep all your local changes at the top of
 | 
			
		||||
  FFmpeg's master tree. The master tree will reject pushes with merge commits.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
3. Adding/removing files/directories:
 | 
			
		||||
 | 
			
		||||
    git add [-A] <filename/dirname>
 | 
			
		||||
    git rm [-r] <filename/dirname>
 | 
			
		||||
 | 
			
		||||
  GIT needs to get notified of all changes you make to your working
 | 
			
		||||
  directory that makes files appear or disappear.
 | 
			
		||||
  Line moves across files are automatically tracked.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
4. Showing modifications:
 | 
			
		||||
 | 
			
		||||
    git diff <filename(s)>
 | 
			
		||||
 | 
			
		||||
  will show all local modifications in your working directory as unified diff.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
5. Inspecting the changelog:
 | 
			
		||||
 | 
			
		||||
    git log <filename(s)>
 | 
			
		||||
 | 
			
		||||
  You may also use the graphical tools like gitview or gitk or the web
 | 
			
		||||
  interface available at http://source.ffmpeg.org
 | 
			
		||||
 | 
			
		||||
6. Checking source tree status:
 | 
			
		||||
 | 
			
		||||
    git status
 | 
			
		||||
 | 
			
		||||
  detects all the changes you made and lists what actions will be taken in case
 | 
			
		||||
  of a commit (additions, modifications, deletions, etc.).
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
7. Committing:
 | 
			
		||||
 | 
			
		||||
    git diff --check
 | 
			
		||||
 | 
			
		||||
  to double check your changes before committing them to avoid trouble later
 | 
			
		||||
  on. All experienced developers do this on each and every commit, no matter
 | 
			
		||||
  how small.
 | 
			
		||||
  Every one of them has been saved from looking like a fool by this many times.
 | 
			
		||||
  It's very easy for stray debug output or cosmetic modifications to slip in,
 | 
			
		||||
  please avoid problems through this extra level of scrutiny.
 | 
			
		||||
 | 
			
		||||
  For cosmetics-only commits you should get (almost) empty output from
 | 
			
		||||
 | 
			
		||||
    git diff -w -b <filename(s)>
 | 
			
		||||
 | 
			
		||||
  Also check the output of
 | 
			
		||||
 | 
			
		||||
    git status
 | 
			
		||||
 | 
			
		||||
  to make sure you don't have untracked files or deletions.
 | 
			
		||||
 | 
			
		||||
    git add [-i|-p|-A] <filenames/dirnames>
 | 
			
		||||
 | 
			
		||||
  Make sure you have told git your name and email address, e.g. by running
 | 
			
		||||
    git config --global user.name "My Name"
 | 
			
		||||
    git config --global user.email my@email.invalid
 | 
			
		||||
  (--global to set the global configuration for all your git checkouts).
 | 
			
		||||
 | 
			
		||||
  Git will select the changes to the files for commit. Optionally you can use
 | 
			
		||||
  the interactive or the patch mode to select hunk by hunk what should be
 | 
			
		||||
  added to the commit.
 | 
			
		||||
 | 
			
		||||
    git commit
 | 
			
		||||
 | 
			
		||||
  Git will commit the selected changes to your current local branch.
 | 
			
		||||
 | 
			
		||||
  You will be prompted for a log message in an editor, which is either
 | 
			
		||||
  set in your personal configuration file through
 | 
			
		||||
 | 
			
		||||
    git config core.editor
 | 
			
		||||
 | 
			
		||||
  or set by one of the following environment variables:
 | 
			
		||||
  GIT_EDITOR, VISUAL or EDITOR.
 | 
			
		||||
 | 
			
		||||
  Log messages should be concise but descriptive. Explain why you made a change,
 | 
			
		||||
  what you did will be obvious from the changes themselves most of the time.
 | 
			
		||||
  Saying just "bug fix" or "10l" is bad. Remember that people of varying skill
 | 
			
		||||
  levels look at and educate themselves while reading through your code. Don't
 | 
			
		||||
  include filenames in log messages, Git provides that information.
 | 
			
		||||
 | 
			
		||||
  Possibly make the commit message have a terse, descriptive first line, an
 | 
			
		||||
  empty line and then a full description. The first line will be used to name
 | 
			
		||||
  the patch by git format-patch.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
8. Renaming/moving/copying files or contents of files:
 | 
			
		||||
 | 
			
		||||
  Git automatically tracks such changes, making those normal commits.
 | 
			
		||||
 | 
			
		||||
    mv/cp path/file otherpath/otherfile
 | 
			
		||||
 | 
			
		||||
    git add [-A] .
 | 
			
		||||
 | 
			
		||||
    git commit
 | 
			
		||||
 | 
			
		||||
  Do not move, rename or copy files of which you are not the maintainer without
 | 
			
		||||
  discussing it on the mailing list first!
 | 
			
		||||
 | 
			
		||||
9. Reverting broken commits
 | 
			
		||||
 | 
			
		||||
    git revert <commit>
 | 
			
		||||
 | 
			
		||||
  git revert will generate a revert commit. This will not make the faulty
 | 
			
		||||
  commit disappear from the history.
 | 
			
		||||
 | 
			
		||||
    git reset <commit>
 | 
			
		||||
 | 
			
		||||
  git reset will uncommit the changes till <commit> rewriting the current
 | 
			
		||||
  branch history.
 | 
			
		||||
 | 
			
		||||
    git commit --amend
 | 
			
		||||
 | 
			
		||||
  allows to amend the last commit details quickly.
 | 
			
		||||
 | 
			
		||||
    git rebase -i origin/master
 | 
			
		||||
 | 
			
		||||
  will replay local commits over the main repository allowing to edit,
 | 
			
		||||
  merge or remove some of them in the process.
 | 
			
		||||
 | 
			
		||||
  Note that the reset, commit --amend and rebase rewrite history, so you
 | 
			
		||||
  should use them ONLY on your local or topic branches.
 | 
			
		||||
 | 
			
		||||
  The main repository will reject those changes.
 | 
			
		||||
 | 
			
		||||
10. Preparing a patchset.
 | 
			
		||||
 | 
			
		||||
    git format-patch <commit> [-o directory]
 | 
			
		||||
 | 
			
		||||
  will generate a set of patches for each commit between <commit> and
 | 
			
		||||
  current HEAD. E.g.
 | 
			
		||||
 | 
			
		||||
    git format-patch origin/master
 | 
			
		||||
 | 
			
		||||
  will generate patches for all commits on current branch which are not
 | 
			
		||||
  present in upstream.
 | 
			
		||||
  A useful shortcut is also
 | 
			
		||||
 | 
			
		||||
    git format-patch -n
 | 
			
		||||
 | 
			
		||||
  which will generate patches from last n commits.
 | 
			
		||||
  By default the patches are created in the current directory.
 | 
			
		||||
 | 
			
		||||
11. Sending patches for review
 | 
			
		||||
 | 
			
		||||
    git send-email <commit list|directory>
 | 
			
		||||
 | 
			
		||||
  will send the patches created by git format-patch or directly generates
 | 
			
		||||
  them. All the email fields can be configured in the global/local
 | 
			
		||||
  configuration or overridden by command line.
 | 
			
		||||
  Note that this tool must often be installed separately (e.g. git-email
 | 
			
		||||
  package on Debian-based distros).
 | 
			
		||||
 | 
			
		||||
12. Pushing changes to remote trees
 | 
			
		||||
 | 
			
		||||
    git push
 | 
			
		||||
 | 
			
		||||
  Will push the changes to the default remote (origin).
 | 
			
		||||
  Git will prevent you from pushing changes if the local and remote trees are
 | 
			
		||||
  out of sync. Refer to 2 and 2.a to sync the local tree.
 | 
			
		||||
 | 
			
		||||
    git remote add <name> <url>
 | 
			
		||||
 | 
			
		||||
  Will add additional remote with a name reference, it is useful if you want
 | 
			
		||||
  to push your local branch for review on a remote host.
 | 
			
		||||
 | 
			
		||||
    git push <remote> <refspec>
 | 
			
		||||
 | 
			
		||||
  Will push the changes to the remote repository. Omitting refspec makes git
 | 
			
		||||
  push update all the remote branches matching the local ones.
 | 
			
		||||
 | 
			
		||||
13. Finding a specific svn revision
 | 
			
		||||
 | 
			
		||||
  Since version 1.7.1 git supports ':/foo' syntax for specifying commits
 | 
			
		||||
  based on a regular expression. see man gitrevisions
 | 
			
		||||
 | 
			
		||||
    git show :/'as revision 23456'
 | 
			
		||||
 | 
			
		||||
  will show the svn changeset r23456. With older git versions searching in
 | 
			
		||||
  the git log output is the easiest option (especially if a pager with
 | 
			
		||||
  search capabilities is used).
 | 
			
		||||
  This commit can be checked out with
 | 
			
		||||
 | 
			
		||||
    git checkout -b svn_23456 :/'as revision 23456'
 | 
			
		||||
 | 
			
		||||
  or for git < 1.7.1 with
 | 
			
		||||
 | 
			
		||||
    git checkout -b svn_23456 $SHA1
 | 
			
		||||
 | 
			
		||||
  where $SHA1 is the commit SHA1 from the 'git log' output.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
Contact the project admins <root at ffmpeg dot org> if you have technical
 | 
			
		||||
problems with the GIT server.
 | 
			
		||||
							
								
								
									
										717
									
								
								doc/indevs.texi
									
									
									
									
									
								
							
							
						
						
									
										717
									
								
								doc/indevs.texi
									
									
									
									
									
								
							@@ -1,717 +0,0 @@
 | 
			
		||||
@chapter Input Devices
 | 
			
		||||
@c man begin INPUT DEVICES
 | 
			
		||||
 | 
			
		||||
Input devices are configured elements in FFmpeg which allow to access
 | 
			
		||||
the data coming from a multimedia device attached to your system.
 | 
			
		||||
 | 
			
		||||
When you configure your FFmpeg build, all the supported input devices
 | 
			
		||||
are enabled by default. You can list all available ones using the
 | 
			
		||||
configure option "--list-indevs".
 | 
			
		||||
 | 
			
		||||
You can disable all the input devices using the configure option
 | 
			
		||||
"--disable-indevs", and selectively enable an input device using the
 | 
			
		||||
option "--enable-indev=@var{INDEV}", or you can disable a particular
 | 
			
		||||
input device using the option "--disable-indev=@var{INDEV}".
 | 
			
		||||
 | 
			
		||||
The option "-formats" of the ff* tools will display the list of
 | 
			
		||||
supported input devices (amongst the demuxers).
 | 
			
		||||
 | 
			
		||||
A description of the currently available input devices follows.
 | 
			
		||||
 | 
			
		||||
@section alsa
 | 
			
		||||
 | 
			
		||||
ALSA (Advanced Linux Sound Architecture) input device.
 | 
			
		||||
 | 
			
		||||
To enable this input device during configuration you need libasound
 | 
			
		||||
installed on your system.
 | 
			
		||||
 | 
			
		||||
This device allows capturing from an ALSA device. The name of the
 | 
			
		||||
device to capture has to be an ALSA card identifier.
 | 
			
		||||
 | 
			
		||||
An ALSA identifier has the syntax:
 | 
			
		||||
@example
 | 
			
		||||
hw:@var{CARD}[,@var{DEV}[,@var{SUBDEV}]]
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
where the @var{DEV} and @var{SUBDEV} components are optional.
 | 
			
		||||
 | 
			
		||||
The three arguments (in order: @var{CARD},@var{DEV},@var{SUBDEV})
 | 
			
		||||
specify card number or identifier, device number and subdevice number
 | 
			
		||||
(-1 means any).
 | 
			
		||||
 | 
			
		||||
To see the list of cards currently recognized by your system check the
 | 
			
		||||
files @file{/proc/asound/cards} and @file{/proc/asound/devices}.
 | 
			
		||||
 | 
			
		||||
For example to capture with @command{ffmpeg} from an ALSA device with
 | 
			
		||||
card id 0, you may run the command:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f alsa -i hw:0 alsaout.wav
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
For more information see:
 | 
			
		||||
@url{http://www.alsa-project.org/alsa-doc/alsa-lib/pcm.html}
 | 
			
		||||
 | 
			
		||||
@section bktr
 | 
			
		||||
 | 
			
		||||
BSD video input device.
 | 
			
		||||
 | 
			
		||||
@section dshow
 | 
			
		||||
 | 
			
		||||
Windows DirectShow input device.
 | 
			
		||||
 | 
			
		||||
DirectShow support is enabled when FFmpeg is built with the mingw-w64 project.
 | 
			
		||||
Currently only audio and video devices are supported.
 | 
			
		||||
 | 
			
		||||
Multiple devices may be opened as separate inputs, but they may also be
 | 
			
		||||
opened on the same input, which should improve synchronism between them.
 | 
			
		||||
 | 
			
		||||
The input name should be in the format:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
@var{TYPE}=@var{NAME}[:@var{TYPE}=@var{NAME}]
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
where @var{TYPE} can be either @var{audio} or @var{video},
 | 
			
		||||
and @var{NAME} is the device's name.
 | 
			
		||||
 | 
			
		||||
@subsection Options
 | 
			
		||||
 | 
			
		||||
If no options are specified, the device's defaults are used.
 | 
			
		||||
If the device does not support the requested options, it will
 | 
			
		||||
fail to open.
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item video_size
 | 
			
		||||
Set the video size in the captured video.
 | 
			
		||||
 | 
			
		||||
@item framerate
 | 
			
		||||
Set the framerate in the captured video.
 | 
			
		||||
 | 
			
		||||
@item sample_rate
 | 
			
		||||
Set the sample rate (in Hz) of the captured audio.
 | 
			
		||||
 | 
			
		||||
@item sample_size
 | 
			
		||||
Set the sample size (in bits) of the captured audio.
 | 
			
		||||
 | 
			
		||||
@item channels
 | 
			
		||||
Set the number of channels in the captured audio.
 | 
			
		||||
 | 
			
		||||
@item list_devices
 | 
			
		||||
If set to @option{true}, print a list of devices and exit.
 | 
			
		||||
 | 
			
		||||
@item list_options
 | 
			
		||||
If set to @option{true}, print a list of selected device's options
 | 
			
		||||
and exit.
 | 
			
		||||
 | 
			
		||||
@item video_device_number
 | 
			
		||||
Set video device number for devices with same name (starts at 0,
 | 
			
		||||
defaults to 0).
 | 
			
		||||
 | 
			
		||||
@item audio_device_number
 | 
			
		||||
Set audio device number for devices with same name (starts at 0,
 | 
			
		||||
defaults to 0).
 | 
			
		||||
 | 
			
		||||
@item pixel_format
 | 
			
		||||
Select pixel format to be used by DirectShow. This may only be set when
 | 
			
		||||
the video codec is not set or set to rawvideo.
 | 
			
		||||
 | 
			
		||||
@item audio_buffer_size
 | 
			
		||||
Set audio device buffer size in milliseconds (which can directly
 | 
			
		||||
impact latency, depending on the device).
 | 
			
		||||
Defaults to using the audio device's
 | 
			
		||||
default buffer size (typically some multiple of 500ms).
 | 
			
		||||
Setting this value too low can degrade performance.
 | 
			
		||||
See also
 | 
			
		||||
@url{http://msdn.microsoft.com/en-us/library/windows/desktop/dd377582(v=vs.85).aspx}
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@subsection Examples
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Print the list of DirectShow supported devices and exit:
 | 
			
		||||
@example
 | 
			
		||||
$ ffmpeg -list_devices true -f dshow -i dummy
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Open video device @var{Camera}:
 | 
			
		||||
@example
 | 
			
		||||
$ ffmpeg -f dshow -i video="Camera"
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Open second video device with name @var{Camera}:
 | 
			
		||||
@example
 | 
			
		||||
$ ffmpeg -f dshow -video_device_number 1 -i video="Camera"
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Open video device @var{Camera} and audio device @var{Microphone}:
 | 
			
		||||
@example
 | 
			
		||||
$ ffmpeg -f dshow -i video="Camera":audio="Microphone"
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Print the list of supported options in selected device and exit:
 | 
			
		||||
@example
 | 
			
		||||
$ ffmpeg -list_options true -f dshow -i video="Camera"
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@section dv1394
 | 
			
		||||
 | 
			
		||||
Linux DV 1394 input device.
 | 
			
		||||
 | 
			
		||||
@section fbdev
 | 
			
		||||
 | 
			
		||||
Linux framebuffer input device.
 | 
			
		||||
 | 
			
		||||
The Linux framebuffer is a graphic hardware-independent abstraction
 | 
			
		||||
layer to show graphics on a computer monitor, typically on the
 | 
			
		||||
console. It is accessed through a file device node, usually
 | 
			
		||||
@file{/dev/fb0}.
 | 
			
		||||
 | 
			
		||||
For more detailed information read the file
 | 
			
		||||
Documentation/fb/framebuffer.txt included in the Linux source tree.
 | 
			
		||||
 | 
			
		||||
To record from the framebuffer device @file{/dev/fb0} with
 | 
			
		||||
@command{ffmpeg}:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f fbdev -r 10 -i /dev/fb0 out.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
You can take a single screenshot image with the command:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f fbdev -frames:v 1 -r 1 -i /dev/fb0 screenshot.jpeg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
See also @url{http://linux-fbdev.sourceforge.net/}, and fbset(1).
 | 
			
		||||
 | 
			
		||||
@section iec61883
 | 
			
		||||
 | 
			
		||||
FireWire DV/HDV input device using libiec61883.
 | 
			
		||||
 | 
			
		||||
To enable this input device, you need libiec61883, libraw1394 and
 | 
			
		||||
libavc1394 installed on your system. Use the configure option
 | 
			
		||||
@code{--enable-libiec61883} to compile with the device enabled.
 | 
			
		||||
 | 
			
		||||
The iec61883 capture device supports capturing from a video device
 | 
			
		||||
connected via IEEE1394 (FireWire), using libiec61883 and the new Linux
 | 
			
		||||
FireWire stack (juju). This is the default DV/HDV input method in Linux
 | 
			
		||||
Kernel 2.6.37 and later, since the old FireWire stack was removed.
 | 
			
		||||
 | 
			
		||||
Specify the FireWire port to be used as input file, or "auto"
 | 
			
		||||
to choose the first port connected.
 | 
			
		||||
 | 
			
		||||
@subsection Options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item dvtype
 | 
			
		||||
Override autodetection of DV/HDV. This should only be used if auto
 | 
			
		||||
detection does not work, or if usage of a different device type
 | 
			
		||||
should be prohibited. Treating a DV device as HDV (or vice versa) will
 | 
			
		||||
not work and result in undefined behavior.
 | 
			
		||||
The values @option{auto}, @option{dv} and @option{hdv} are supported.
 | 
			
		||||
 | 
			
		||||
@item dvbuffer
 | 
			
		||||
Set maxiumum size of buffer for incoming data, in frames. For DV, this
 | 
			
		||||
is an exact value. For HDV, it is not frame exact, since HDV does
 | 
			
		||||
not have a fixed frame size.
 | 
			
		||||
 | 
			
		||||
@item dvguid
 | 
			
		||||
Select the capture device by specifying it's GUID. Capturing will only
 | 
			
		||||
be performed from the specified device and fails if no device with the
 | 
			
		||||
given GUID is found. This is useful to select the input if multiple
 | 
			
		||||
devices are connected at the same time.
 | 
			
		||||
Look at /sys/bus/firewire/devices to find out the GUIDs.
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@subsection Examples
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Grab and show the input of a FireWire DV/HDV device.
 | 
			
		||||
@example
 | 
			
		||||
ffplay -f iec61883 -i auto
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Grab and record the input of a FireWire DV/HDV device,
 | 
			
		||||
using a packet buffer of 100000 packets if the source is HDV.
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f iec61883 -i auto -hdvbuffer 100000 out.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@section jack
 | 
			
		||||
 | 
			
		||||
JACK input device.
 | 
			
		||||
 | 
			
		||||
To enable this input device during configuration you need libjack
 | 
			
		||||
installed on your system.
 | 
			
		||||
 | 
			
		||||
A JACK input device creates one or more JACK writable clients, one for
 | 
			
		||||
each audio channel, with name @var{client_name}:input_@var{N}, where
 | 
			
		||||
@var{client_name} is the name provided by the application, and @var{N}
 | 
			
		||||
is a number which identifies the channel.
 | 
			
		||||
Each writable client will send the acquired data to the FFmpeg input
 | 
			
		||||
device.
 | 
			
		||||
 | 
			
		||||
Once you have created one or more JACK readable clients, you need to
 | 
			
		||||
connect them to one or more JACK writable clients.
 | 
			
		||||
 | 
			
		||||
To connect or disconnect JACK clients you can use the @command{jack_connect}
 | 
			
		||||
and @command{jack_disconnect} programs, or do it through a graphical interface,
 | 
			
		||||
for example with @command{qjackctl}.
 | 
			
		||||
 | 
			
		||||
To list the JACK clients and their properties you can invoke the command
 | 
			
		||||
@command{jack_lsp}.
 | 
			
		||||
 | 
			
		||||
Follows an example which shows how to capture a JACK readable client
 | 
			
		||||
with @command{ffmpeg}.
 | 
			
		||||
@example
 | 
			
		||||
# Create a JACK writable client with name "ffmpeg".
 | 
			
		||||
$ ffmpeg -f jack -i ffmpeg -y out.wav
 | 
			
		||||
 | 
			
		||||
# Start the sample jack_metro readable client.
 | 
			
		||||
$ jack_metro -b 120 -d 0.2 -f 4000
 | 
			
		||||
 | 
			
		||||
# List the current JACK clients.
 | 
			
		||||
$ jack_lsp -c
 | 
			
		||||
system:capture_1
 | 
			
		||||
system:capture_2
 | 
			
		||||
system:playback_1
 | 
			
		||||
system:playback_2
 | 
			
		||||
ffmpeg:input_1
 | 
			
		||||
metro:120_bpm
 | 
			
		||||
 | 
			
		||||
# Connect metro to the ffmpeg writable client.
 | 
			
		||||
$ jack_connect metro:120_bpm ffmpeg:input_1
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
For more information read:
 | 
			
		||||
@url{http://jackaudio.org/}
 | 
			
		||||
 | 
			
		||||
@section lavfi
 | 
			
		||||
 | 
			
		||||
Libavfilter input virtual device.
 | 
			
		||||
 | 
			
		||||
This input device reads data from the open output pads of a libavfilter
 | 
			
		||||
filtergraph.
 | 
			
		||||
 | 
			
		||||
For each filtergraph open output, the input device will create a
 | 
			
		||||
corresponding stream which is mapped to the generated output. Currently
 | 
			
		||||
only video data is supported. The filtergraph is specified through the
 | 
			
		||||
option @option{graph}.
 | 
			
		||||
 | 
			
		||||
@subsection Options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item graph
 | 
			
		||||
Specify the filtergraph to use as input. Each video open output must be
 | 
			
		||||
labelled by a unique string of the form "out@var{N}", where @var{N} is a
 | 
			
		||||
number starting from 0 corresponding to the mapped input stream
 | 
			
		||||
generated by the device.
 | 
			
		||||
The first unlabelled output is automatically assigned to the "out0"
 | 
			
		||||
label, but all the others need to be specified explicitly.
 | 
			
		||||
 | 
			
		||||
If not specified defaults to the filename specified for the input
 | 
			
		||||
device.
 | 
			
		||||
 | 
			
		||||
@item graph_file
 | 
			
		||||
Set the filename of the filtergraph to be read and sent to the other
 | 
			
		||||
filters. Syntax of the filtergraph is the same as the one specified by
 | 
			
		||||
the option @var{graph}.
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@subsection Examples
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
@item
 | 
			
		||||
Create a color video stream and play it back with @command{ffplay}:
 | 
			
		||||
@example
 | 
			
		||||
ffplay -f lavfi -graph "color=c=pink [out0]" dummy
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
As the previous example, but use filename for specifying the graph
 | 
			
		||||
description, and omit the "out0" label:
 | 
			
		||||
@example
 | 
			
		||||
ffplay -f lavfi color=c=pink
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Create three different video test filtered sources and play them:
 | 
			
		||||
@example
 | 
			
		||||
ffplay -f lavfi -graph "testsrc [out0]; testsrc,hflip [out1]; testsrc,negate [out2]" test3
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Read an audio stream from a file using the amovie source and play it
 | 
			
		||||
back with @command{ffplay}:
 | 
			
		||||
@example
 | 
			
		||||
ffplay -f lavfi "amovie=test.wav"
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Read an audio stream and a video stream and play it back with
 | 
			
		||||
@command{ffplay}:
 | 
			
		||||
@example
 | 
			
		||||
ffplay -f lavfi "movie=test.avi[out0];amovie=test.wav[out1]"
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@section libdc1394
 | 
			
		||||
 | 
			
		||||
IIDC1394 input device, based on libdc1394 and libraw1394.
 | 
			
		||||
 | 
			
		||||
@section openal
 | 
			
		||||
 | 
			
		||||
The OpenAL input device provides audio capture on all systems with a
 | 
			
		||||
working OpenAL 1.1 implementation.
 | 
			
		||||
 | 
			
		||||
To enable this input device during configuration, you need OpenAL
 | 
			
		||||
headers and libraries installed on your system, and need to configure
 | 
			
		||||
FFmpeg with @code{--enable-openal}.
 | 
			
		||||
 | 
			
		||||
OpenAL headers and libraries should be provided as part of your OpenAL
 | 
			
		||||
implementation, or as an additional download (an SDK). Depending on your
 | 
			
		||||
installation you may need to specify additional flags via the
 | 
			
		||||
@code{--extra-cflags} and @code{--extra-ldflags} for allowing the build
 | 
			
		||||
system to locate the OpenAL headers and libraries.
 | 
			
		||||
 | 
			
		||||
An incomplete list of OpenAL implementations follows:
 | 
			
		||||
 | 
			
		||||
@table @strong
 | 
			
		||||
@item Creative
 | 
			
		||||
The official Windows implementation, providing hardware acceleration
 | 
			
		||||
with supported devices and software fallback.
 | 
			
		||||
See @url{http://openal.org/}.
 | 
			
		||||
@item OpenAL Soft
 | 
			
		||||
Portable, open source (LGPL) software implementation. Includes
 | 
			
		||||
backends for the most common sound APIs on the Windows, Linux,
 | 
			
		||||
Solaris, and BSD operating systems.
 | 
			
		||||
See @url{http://kcat.strangesoft.net/openal.html}.
 | 
			
		||||
@item Apple
 | 
			
		||||
OpenAL is part of Core Audio, the official Mac OS X Audio interface.
 | 
			
		||||
See @url{http://developer.apple.com/technologies/mac/audio-and-video.html}
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
This device allows to capture from an audio input device handled
 | 
			
		||||
through OpenAL.
 | 
			
		||||
 | 
			
		||||
You need to specify the name of the device to capture in the provided
 | 
			
		||||
filename. If the empty string is provided, the device will
 | 
			
		||||
automatically select the default device. You can get the list of the
 | 
			
		||||
supported devices by using the option @var{list_devices}.
 | 
			
		||||
 | 
			
		||||
@subsection Options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item channels
 | 
			
		||||
Set the number of channels in the captured audio. Only the values
 | 
			
		||||
@option{1} (monaural) and @option{2} (stereo) are currently supported.
 | 
			
		||||
Defaults to @option{2}.
 | 
			
		||||
 | 
			
		||||
@item sample_size
 | 
			
		||||
Set the sample size (in bits) of the captured audio. Only the values
 | 
			
		||||
@option{8} and @option{16} are currently supported. Defaults to
 | 
			
		||||
@option{16}.
 | 
			
		||||
 | 
			
		||||
@item sample_rate
 | 
			
		||||
Set the sample rate (in Hz) of the captured audio.
 | 
			
		||||
Defaults to @option{44.1k}.
 | 
			
		||||
 | 
			
		||||
@item list_devices
 | 
			
		||||
If set to @option{true}, print a list of devices and exit.
 | 
			
		||||
Defaults to @option{false}.
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@subsection Examples
 | 
			
		||||
 | 
			
		||||
Print the list of OpenAL supported devices and exit:
 | 
			
		||||
@example
 | 
			
		||||
$ ffmpeg -list_devices true -f openal -i dummy out.ogg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Capture from the OpenAL device @file{DR-BT101 via PulseAudio}:
 | 
			
		||||
@example
 | 
			
		||||
$ ffmpeg -f openal -i 'DR-BT101 via PulseAudio' out.ogg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Capture from the default device (note the empty string '' as filename):
 | 
			
		||||
@example
 | 
			
		||||
$ ffmpeg -f openal -i '' out.ogg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Capture from two devices simultaneously, writing to two different files,
 | 
			
		||||
within the same @command{ffmpeg} command:
 | 
			
		||||
@example
 | 
			
		||||
$ ffmpeg -f openal -i 'DR-BT101 via PulseAudio' out1.ogg -f openal -i 'ALSA Default' out2.ogg
 | 
			
		||||
@end example
 | 
			
		||||
Note: not all OpenAL implementations support multiple simultaneous capture -
 | 
			
		||||
try the latest OpenAL Soft if the above does not work.
 | 
			
		||||
 | 
			
		||||
@section oss
 | 
			
		||||
 | 
			
		||||
Open Sound System input device.
 | 
			
		||||
 | 
			
		||||
The filename to provide to the input device is the device node
 | 
			
		||||
representing the OSS input device, and is usually set to
 | 
			
		||||
@file{/dev/dsp}.
 | 
			
		||||
 | 
			
		||||
For example to grab from @file{/dev/dsp} using @command{ffmpeg} use the
 | 
			
		||||
command:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f oss -i /dev/dsp /tmp/oss.wav
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
For more information about OSS see:
 | 
			
		||||
@url{http://manuals.opensound.com/usersguide/dsp.html}
 | 
			
		||||
 | 
			
		||||
@section pulse
 | 
			
		||||
 | 
			
		||||
pulseaudio input device.
 | 
			
		||||
 | 
			
		||||
To enable this input device during configuration you need libpulse-simple
 | 
			
		||||
installed in your system.
 | 
			
		||||
 | 
			
		||||
The filename to provide to the input device is a source device or the
 | 
			
		||||
string "default"
 | 
			
		||||
 | 
			
		||||
To list the pulse source devices and their properties you can invoke
 | 
			
		||||
the command @command{pactl list sources}.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f pulse -i default /tmp/pulse.wav
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@subsection @var{server} AVOption
 | 
			
		||||
 | 
			
		||||
The syntax is:
 | 
			
		||||
@example
 | 
			
		||||
-server @var{server name}
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Connects to a specific server.
 | 
			
		||||
 | 
			
		||||
@subsection @var{name} AVOption
 | 
			
		||||
 | 
			
		||||
The syntax is:
 | 
			
		||||
@example
 | 
			
		||||
-name @var{application name}
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Specify the application name pulse will use when showing active clients,
 | 
			
		||||
by default it is the LIBAVFORMAT_IDENT string
 | 
			
		||||
 | 
			
		||||
@subsection @var{stream_name} AVOption
 | 
			
		||||
 | 
			
		||||
The syntax is:
 | 
			
		||||
@example
 | 
			
		||||
-stream_name @var{stream name}
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Specify the stream name pulse will use when showing active streams,
 | 
			
		||||
by default it is "record"
 | 
			
		||||
 | 
			
		||||
@subsection @var{sample_rate} AVOption
 | 
			
		||||
 | 
			
		||||
The syntax is:
 | 
			
		||||
@example
 | 
			
		||||
-sample_rate @var{samplerate}
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Specify the samplerate in Hz, by default 48kHz is used.
 | 
			
		||||
 | 
			
		||||
@subsection @var{channels} AVOption
 | 
			
		||||
 | 
			
		||||
The syntax is:
 | 
			
		||||
@example
 | 
			
		||||
-channels @var{N}
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Specify the channels in use, by default 2 (stereo) is set.
 | 
			
		||||
 | 
			
		||||
@subsection @var{frame_size} AVOption
 | 
			
		||||
 | 
			
		||||
The syntax is:
 | 
			
		||||
@example
 | 
			
		||||
-frame_size @var{bytes}
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Specify the number of byte per frame, by default it is set to 1024.
 | 
			
		||||
 | 
			
		||||
@subsection @var{fragment_size} AVOption
 | 
			
		||||
 | 
			
		||||
The syntax is:
 | 
			
		||||
@example
 | 
			
		||||
-fragment_size @var{bytes}
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Specify the minimal buffering fragment in pulseaudio, it will affect the
 | 
			
		||||
audio latency. By default it is unset.
 | 
			
		||||
 | 
			
		||||
@section sndio
 | 
			
		||||
 | 
			
		||||
sndio input device.
 | 
			
		||||
 | 
			
		||||
To enable this input device during configuration you need libsndio
 | 
			
		||||
installed on your system.
 | 
			
		||||
 | 
			
		||||
The filename to provide to the input device is the device node
 | 
			
		||||
representing the sndio input device, and is usually set to
 | 
			
		||||
@file{/dev/audio0}.
 | 
			
		||||
 | 
			
		||||
For example to grab from @file{/dev/audio0} using @command{ffmpeg} use the
 | 
			
		||||
command:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f sndio -i /dev/audio0 /tmp/oss.wav
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section video4linux2
 | 
			
		||||
 | 
			
		||||
Video4Linux2 input video device.
 | 
			
		||||
 | 
			
		||||
The name of the device to grab is a file device node, usually Linux
 | 
			
		||||
systems tend to automatically create such nodes when the device
 | 
			
		||||
(e.g. an USB webcam) is plugged into the system, and has a name of the
 | 
			
		||||
kind @file{/dev/video@var{N}}, where @var{N} is a number associated to
 | 
			
		||||
the device.
 | 
			
		||||
 | 
			
		||||
Video4Linux2 devices usually support a limited set of
 | 
			
		||||
@var{width}x@var{height} sizes and framerates. You can check which are
 | 
			
		||||
supported using @command{-list_formats all} for Video4Linux2 devices.
 | 
			
		||||
 | 
			
		||||
Some usage examples of the video4linux2 devices with ffmpeg and ffplay:
 | 
			
		||||
 | 
			
		||||
The time base for the timestamps is 1 microsecond. Depending on the kernel
 | 
			
		||||
version and configuration, the timestamps may be derived from the real time
 | 
			
		||||
clock (origin at the Unix Epoch) or the monotonic clock (origin usually at
 | 
			
		||||
boot time, unaffected by NTP or manual changes to the clock). The
 | 
			
		||||
@option{-timestamps abs} or @option{-ts abs} option can be used to force
 | 
			
		||||
conversion into the real time clock.
 | 
			
		||||
 | 
			
		||||
Note that if FFmpeg is build with v4l-utils support ("--enable-libv4l2"
 | 
			
		||||
option), it will always be used.
 | 
			
		||||
@example
 | 
			
		||||
# Grab and show the input of a video4linux2 device.
 | 
			
		||||
ffplay -f video4linux2 -framerate 30 -video_size hd720 /dev/video0
 | 
			
		||||
 | 
			
		||||
# Grab and record the input of a video4linux2 device, leave the
 | 
			
		||||
framerate and size as previously set.
 | 
			
		||||
ffmpeg -f video4linux2 -input_format mjpeg -i /dev/video0 out.mpeg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
"v4l" and "v4l2" can be used as aliases for the respective "video4linux" and
 | 
			
		||||
"video4linux2".
 | 
			
		||||
 | 
			
		||||
@section vfwcap
 | 
			
		||||
 | 
			
		||||
VfW (Video for Windows) capture input device.
 | 
			
		||||
 | 
			
		||||
The filename passed as input is the capture driver number, ranging from
 | 
			
		||||
0 to 9. You may use "list" as filename to print a list of drivers. Any
 | 
			
		||||
other filename will be interpreted as device number 0.
 | 
			
		||||
 | 
			
		||||
@section x11grab
 | 
			
		||||
 | 
			
		||||
X11 video input device.
 | 
			
		||||
 | 
			
		||||
This device allows to capture a region of an X11 display.
 | 
			
		||||
 | 
			
		||||
The filename passed as input has the syntax:
 | 
			
		||||
@example
 | 
			
		||||
[@var{hostname}]:@var{display_number}.@var{screen_number}[+@var{x_offset},@var{y_offset}]
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@var{hostname}:@var{display_number}.@var{screen_number} specifies the
 | 
			
		||||
X11 display name of the screen to grab from. @var{hostname} can be
 | 
			
		||||
omitted, and defaults to "localhost". The environment variable
 | 
			
		||||
@env{DISPLAY} contains the default display name.
 | 
			
		||||
 | 
			
		||||
@var{x_offset} and @var{y_offset} specify the offsets of the grabbed
 | 
			
		||||
area with respect to the top-left border of the X11 screen. They
 | 
			
		||||
default to 0.
 | 
			
		||||
 | 
			
		||||
Check the X11 documentation (e.g. man X) for more detailed information.
 | 
			
		||||
 | 
			
		||||
Use the @command{dpyinfo} program for getting basic information about the
 | 
			
		||||
properties of your X11 display (e.g. grep for "name" or "dimensions").
 | 
			
		||||
 | 
			
		||||
For example to grab from @file{:0.0} using @command{ffmpeg}:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f x11grab -r 25 -s cif -i :0.0 out.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Grab at position @code{10,20}:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f x11grab -r 25 -s cif -i :0.0+10,20 out.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@subsection Options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item draw_mouse
 | 
			
		||||
Specify whether to draw the mouse pointer. A value of @code{0} specify
 | 
			
		||||
not to draw the pointer. Default value is @code{1}.
 | 
			
		||||
 | 
			
		||||
@item follow_mouse
 | 
			
		||||
Make the grabbed area follow the mouse. The argument can be
 | 
			
		||||
@code{centered} or a number of pixels @var{PIXELS}.
 | 
			
		||||
 | 
			
		||||
When it is specified with "centered", the grabbing region follows the mouse
 | 
			
		||||
pointer and keeps the pointer at the center of region; otherwise, the region
 | 
			
		||||
follows only when the mouse pointer reaches within @var{PIXELS} (greater than
 | 
			
		||||
zero) to the edge of region.
 | 
			
		||||
 | 
			
		||||
For example:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f x11grab -follow_mouse centered -r 25 -s cif -i :0.0 out.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
To follow only when the mouse pointer reaches within 100 pixels to edge:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f x11grab -follow_mouse 100 -r 25 -s cif -i :0.0 out.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item framerate
 | 
			
		||||
Set the grabbing frame rate. Default value is @code{ntsc},
 | 
			
		||||
corresponding to a framerate of @code{30000/1001}.
 | 
			
		||||
 | 
			
		||||
@item show_region
 | 
			
		||||
Show grabbed region on screen.
 | 
			
		||||
 | 
			
		||||
If @var{show_region} is specified with @code{1}, then the grabbing
 | 
			
		||||
region will be indicated on screen. With this option, it is easy to
 | 
			
		||||
know what is being grabbed if only a portion of the screen is grabbed.
 | 
			
		||||
 | 
			
		||||
For example:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f x11grab -show_region 1 -r 25 -s cif -i :0.0+10,20 out.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
With @var{follow_mouse}:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -f x11grab -follow_mouse centered -show_region 1 -r 25 -s cif -i :0.0 out.mpg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item video_size
 | 
			
		||||
Set the video frame size. Default value is @code{vga}.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@c man end INPUT DEVICES
 | 
			
		||||
@@ -5,42 +5,49 @@ NOTE: This is a draft.
 | 
			
		||||
 | 
			
		||||
Overview:
 | 
			
		||||
---------
 | 
			
		||||
 | 
			
		||||
FFmpeg uses Trac for tracking issues, new issues and changes to
 | 
			
		||||
existing issues can be done through a web interface.
 | 
			
		||||
 | 
			
		||||
Issues can be different kinds of things we want to keep track of
 | 
			
		||||
but that do not belong into the source tree itself. This includes
 | 
			
		||||
bug reports, patches, feature requests and license violations. We
 | 
			
		||||
might add more items to this list in the future, so feel free to
 | 
			
		||||
propose a new `type of issue' on the ffmpeg-devel mailing list if
 | 
			
		||||
you feel it is worth tracking.
 | 
			
		||||
 | 
			
		||||
FFmpeg uses Roundup for tracking issues, new issues and changes to
 | 
			
		||||
existing issues can be done through a web interface and through email.
 | 
			
		||||
It is possible to subscribe to individual issues by adding yourself to the
 | 
			
		||||
Cc list or to subscribe to the ffmpeg-trac mailing list which receives
 | 
			
		||||
a mail for every change to every issue.
 | 
			
		||||
nosy list or to subscribe to the ffmpeg-issues mailing list which receives
 | 
			
		||||
a mail for every change to every issue. Replies to such mails will also
 | 
			
		||||
be properly added to the respective issue.
 | 
			
		||||
(the above does all work already after light testing)
 | 
			
		||||
 | 
			
		||||
The subscription URL for the ffmpeg-trac list is:
 | 
			
		||||
http(s)://ffmpeg.org/mailman/listinfo/ffmpeg-trac
 | 
			
		||||
The subscription URL for the ffmpeg-issues list is:
 | 
			
		||||
http://live.polito/mailman/listinfo/ffmpeg-issues
 | 
			
		||||
The URL of the webinterface of the tracker is:
 | 
			
		||||
http(s)://trac.ffmpeg.org
 | 
			
		||||
http(s)://roundup.ffmpeg/roundup/ffmpeg/
 | 
			
		||||
Note the URLs in this document are obfuscated, you must append the top level
 | 
			
		||||
domain for non-profit organizations to the tracker, and of Italy to the
 | 
			
		||||
mailing list.
 | 
			
		||||
 | 
			
		||||
Email Interface:
 | 
			
		||||
----------------
 | 
			
		||||
There is a mailing list to which all new issues and changes to existing issues
 | 
			
		||||
are sent. You can subscribe through
 | 
			
		||||
http://live.polito/mailman/listinfo/ffmpeg-issues
 | 
			
		||||
Replies to messages there will have their text added to the specific issues.
 | 
			
		||||
Attachments will be added as if they had been uploaded via the web interface.
 | 
			
		||||
You can change the status, substatus, topic, ... by changing the subject in
 | 
			
		||||
your reply like:
 | 
			
		||||
Re: [issue94] register_avcodec and allcodecs.h [type=patch;status=open;substatus=approved]
 | 
			
		||||
Roundup will then change things as you requested and remove the [...] from
 | 
			
		||||
the subject before forwarding the mail to the mailing list.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
NOTE: issue = (bug report || patch || feature request)
 | 
			
		||||
 | 
			
		||||
Type:
 | 
			
		||||
-----
 | 
			
		||||
bug / defect
 | 
			
		||||
bug
 | 
			
		||||
    An error, flaw, mistake, failure, or fault in FFmpeg or libav* that
 | 
			
		||||
    prevents it from behaving as intended.
 | 
			
		||||
 | 
			
		||||
feature request / enhancement
 | 
			
		||||
feature request
 | 
			
		||||
    Request of support for encoding or decoding of a new codec, container
 | 
			
		||||
    or variant.
 | 
			
		||||
    Request of support for more, less or plain different output or behavior
 | 
			
		||||
    where the current implementation cannot be considered wrong.
 | 
			
		||||
 | 
			
		||||
license violation
 | 
			
		||||
    ticket to keep track of (L)GPL violations of ffmpeg by others
 | 
			
		||||
 | 
			
		||||
patch
 | 
			
		||||
    A patch as generated by diff which conforms to the patch submission and
 | 
			
		||||
    development policy.
 | 
			
		||||
@@ -61,8 +68,6 @@ important
 | 
			
		||||
    the separation to normal is somewhat fuzzy.
 | 
			
		||||
    For feature requests this priority would be used for things many people
 | 
			
		||||
    want.
 | 
			
		||||
    Regressions also should be marked as important, regressions are bugs that
 | 
			
		||||
    don't exist in a past revision or another branch.
 | 
			
		||||
 | 
			
		||||
normal
 | 
			
		||||
 | 
			
		||||
@@ -92,17 +97,6 @@ closed
 | 
			
		||||
    final state
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
Analyzed flag:
 | 
			
		||||
--------------
 | 
			
		||||
Bugs which have been analyzed and where it is understood what causes them
 | 
			
		||||
and which exact chain of events triggers them. This analysis should be
 | 
			
		||||
available as a message in the bug report.
 | 
			
		||||
Note, do not change the status to analyzed without also providing a clear
 | 
			
		||||
and understandable analysis.
 | 
			
		||||
This state implicates that the bug either has been reproduced or that
 | 
			
		||||
reproduction is not needed as the bug is already understood.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
Type/Status/Substatus:
 | 
			
		||||
----------
 | 
			
		||||
*/new/new
 | 
			
		||||
@@ -130,6 +124,24 @@ Type/Status/Substatus:
 | 
			
		||||
    Issues for which some information has been requested by the developers,
 | 
			
		||||
    but which has not been provided by anyone within reasonable time.
 | 
			
		||||
 | 
			
		||||
bug/open/reproduced
 | 
			
		||||
    Bugs which have been reproduced.
 | 
			
		||||
 | 
			
		||||
bug/open/analyzed
 | 
			
		||||
    Bugs which have been analyzed and where it is understood what causes them
 | 
			
		||||
    and which exact chain of events triggers them. This analysis should be
 | 
			
		||||
    available as a message in the bug report.
 | 
			
		||||
    Note, do not change the status to analyzed without also providing a clear
 | 
			
		||||
    and understandable analysis.
 | 
			
		||||
    This state implicates that the bug either has been reproduced or that
 | 
			
		||||
    reproduction is not needed as the bug is already understood.
 | 
			
		||||
 | 
			
		||||
bug/open/needs_more_info
 | 
			
		||||
    Bug reports which are incomplete and or where more information is needed
 | 
			
		||||
    from the submitter or another person who can provide it.
 | 
			
		||||
    This state implicates that the bug has not been analyzed or reproduced.
 | 
			
		||||
    Note, the idea behind needs_more_info is to offload work from the
 | 
			
		||||
    developers to the users whenever possible.
 | 
			
		||||
 | 
			
		||||
bug/closed/fixed
 | 
			
		||||
    Bugs which have to the best of our knowledge been fixed.
 | 
			
		||||
@@ -163,6 +175,10 @@ patch/closed/applied
 | 
			
		||||
patch/closed/rejected
 | 
			
		||||
    Patches which have been rejected.
 | 
			
		||||
 | 
			
		||||
feature_request/open/needs_more_info
 | 
			
		||||
    Feature requests where it is not clear what exactly is wanted
 | 
			
		||||
    (these also could be closed as invalid ...).
 | 
			
		||||
 | 
			
		||||
feature_request/closed/implemented
 | 
			
		||||
    Feature requests which have been implemented.
 | 
			
		||||
 | 
			
		||||
@@ -174,10 +190,12 @@ Note, please do not use type-status-substatus combinations other than the
 | 
			
		||||
above without asking on ffmpeg-dev first!
 | 
			
		||||
 | 
			
		||||
Note2, if you provide the requested info do not forget to remove the
 | 
			
		||||
needs_more_info substatus.
 | 
			
		||||
needs_more_info substate.
 | 
			
		||||
 | 
			
		||||
Component:
 | 
			
		||||
----------
 | 
			
		||||
Topic:
 | 
			
		||||
------
 | 
			
		||||
A topic is a tag you should add to your issue in order to make grouping them
 | 
			
		||||
easier.
 | 
			
		||||
 | 
			
		||||
avcodec
 | 
			
		||||
    issues in libavcodec/*
 | 
			
		||||
@@ -197,9 +215,6 @@ ffmpeg
 | 
			
		||||
ffplay
 | 
			
		||||
    issues in or related to ffplay.c
 | 
			
		||||
 | 
			
		||||
ffprobe
 | 
			
		||||
    issues in or related to ffprobe.c
 | 
			
		||||
 | 
			
		||||
ffserver
 | 
			
		||||
    issues in or related to ffserver.c
 | 
			
		||||
 | 
			
		||||
@@ -207,7 +222,7 @@ build system
 | 
			
		||||
    issues in or related to configure/Makefile
 | 
			
		||||
 | 
			
		||||
regression
 | 
			
		||||
    bugs which were not present in a past revision
 | 
			
		||||
    bugs which were working in a past revision
 | 
			
		||||
 | 
			
		||||
trac
 | 
			
		||||
roundup
 | 
			
		||||
    issues related to our issue tracker
 | 
			
		||||
 
 | 
			
		||||
@@ -1,48 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle Libavcodec Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{Libavcodec Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
The libavcodec library provides a generic encoding/decoding framework
 | 
			
		||||
and contains multiple decoders and encoders for audio, video and
 | 
			
		||||
subtitle streams, and several bitstream filters.
 | 
			
		||||
 | 
			
		||||
The shared architecture provides various services ranging from bit
 | 
			
		||||
stream I/O to DSP optimizations, and makes it suitable for
 | 
			
		||||
implementing robust and fast codecs as well as for experimentation.
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{ffmpeg-codecs.html,ffmpeg-codecs}, @url{ffmpeg-bitstream-filters.html,bitstream-filters},
 | 
			
		||||
@url{libavutil.html,libavutil}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1),
 | 
			
		||||
ffmpeg-codecs(1), ffmpeg-bitstream-filters(1),
 | 
			
		||||
libavutil(3)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename libavcodec
 | 
			
		||||
@settitle media streams decoding and encoding library
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
@@ -1,45 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle Libavdevice Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{Libavdevice Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
The libavdevice library provides a generic framework for grabbing from
 | 
			
		||||
and rendering to many common multimedia input/output devices, and
 | 
			
		||||
supports several input and output devices, including Video4Linux2,
 | 
			
		||||
VfW, DShow, and ALSA.
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{ffmpeg-devices.html,ffmpeg-devices},
 | 
			
		||||
@url{libavutil.html,libavutil}, @url{libavcodec.html,libavcodec}, @url{libavformat.html,libavformat}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1),
 | 
			
		||||
ffmpeg-devices(1),
 | 
			
		||||
libavutil(3), libavcodec(3), libavformat(3)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename libavdevice
 | 
			
		||||
@settitle multimedia device handling library
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
@@ -2,43 +2,306 @@
 | 
			
		||||
 | 
			
		||||
@settitle Libavfilter Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@sp 7
 | 
			
		||||
@center @titlefont{Libavfilter Documentation}
 | 
			
		||||
@sp 3
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
@chapter Introduction
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
Libavfilter is the filtering API of FFmpeg. It is the substitute of the
 | 
			
		||||
now deprecated 'vhooks' and started as a Google Summer of Code project.
 | 
			
		||||
 | 
			
		||||
The libavfilter library provides a generic audio/video filtering
 | 
			
		||||
framework containing several filters, sources and sinks.
 | 
			
		||||
Integrating libavfilter into the main FFmpeg repository is a work in
 | 
			
		||||
progress. If you wish to try the unfinished development code of
 | 
			
		||||
libavfilter then check it out from the libavfilter repository into
 | 
			
		||||
some directory of your choice by:
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
@example
 | 
			
		||||
   svn checkout svn://svn.ffmpeg.org/soc/libavfilter
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
And then read the README file in the top directory to learn how to
 | 
			
		||||
integrate it into ffmpeg and ffplay.
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{ffmpeg-filters.html,ffmpeg-filters},
 | 
			
		||||
@url{libavutil.html,libavutil}, @url{libswscale.html,libswscale}, @url{libswresample.html,libswresample},
 | 
			
		||||
@url{libavcodec.html,libavcodec}, @url{libavformat.html,libavformat}, @url{libavdevice.html,libavdevice}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
But note that there may still be serious bugs in the code and its API
 | 
			
		||||
and ABI should not be considered stable yet!
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1),
 | 
			
		||||
ffmpeg-filters(1),
 | 
			
		||||
libavutil(3), libswscale(3), libswresample(3), libavcodec(3), libavformat(3), libavdevice(3)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
@chapter Tutorial
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
In libavfilter, it is possible for filters to have multiple inputs and
 | 
			
		||||
multiple outputs.
 | 
			
		||||
To illustrate the sorts of things that are possible, we can
 | 
			
		||||
use a complex filter graph. For example, the following one:
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
@example
 | 
			
		||||
input --> split --> fifo -----------------------> overlay --> output
 | 
			
		||||
            |                                        ^
 | 
			
		||||
            |                                        |
 | 
			
		||||
            +------> fifo --> crop --> vflip --------+
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@setfilename libavfilter
 | 
			
		||||
@settitle multimedia filtering library
 | 
			
		||||
splits the stream in two streams, sends one stream through the crop filter
 | 
			
		||||
and the vflip filter before merging it back with the other stream by
 | 
			
		||||
overlaying it on top. You can use the following command to achieve this:
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
@example
 | 
			
		||||
./ffmpeg -i in.avi -s 240x320 -vfilters "[in] split [T1], fifo, [T2] overlay= 0:240 [out]; [T1] fifo, crop=0:0:-1:240, vflip [T2]
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
where input_video.avi has a vertical resolution of 480 pixels. The
 | 
			
		||||
result will be that in output the top half of the video is mirrored
 | 
			
		||||
onto the bottom half.
 | 
			
		||||
 | 
			
		||||
Video filters are loaded using the @var{-vfilters} option passed to
 | 
			
		||||
ffmpeg or to ffplay. Filters in the same linear chain are separated by
 | 
			
		||||
commas. In our example, @var{split, fifo, overlay} are in one linear
 | 
			
		||||
chain, and @var{fifo, crop, vflip} are in another. The points where
 | 
			
		||||
the linear chains join are labeled by names enclosed in square
 | 
			
		||||
brackets. In our example, that is @var{[T1]} and @var{[T2]}. The magic
 | 
			
		||||
labels @var{[in]} and @var{[out]} are the points where video is input
 | 
			
		||||
and output.
 | 
			
		||||
 | 
			
		||||
Some filters take in input a list of parameters: they are specified
 | 
			
		||||
after the filter name and an equal sign, and are separated each other
 | 
			
		||||
by a semicolon.
 | 
			
		||||
 | 
			
		||||
There exist so-called @var{source filters} that do not have a video
 | 
			
		||||
input, and we expect in the future some @var{sink filters} that will
 | 
			
		||||
not have video output.
 | 
			
		||||
 | 
			
		||||
@chapter graph2dot
 | 
			
		||||
 | 
			
		||||
The @file{graph2dot} program included in the FFmpeg @file{tools}
 | 
			
		||||
directory can be used to parse a filter graph description and issue a
 | 
			
		||||
corresponding textual representation in the dot language.
 | 
			
		||||
 | 
			
		||||
Invoke the command:
 | 
			
		||||
@example
 | 
			
		||||
graph2dot -h
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
to see how to use @file{graph2dot}.
 | 
			
		||||
 | 
			
		||||
You can then pass the dot description to the @file{dot} program (from
 | 
			
		||||
the graphviz suite of programs) and obtain a graphical representation
 | 
			
		||||
of the filter graph.
 | 
			
		||||
 | 
			
		||||
For example the sequence of commands:
 | 
			
		||||
@example
 | 
			
		||||
echo @var{GRAPH_DESCRIPTION} | \
 | 
			
		||||
tools/graph2dot -o graph.tmp && \
 | 
			
		||||
dot -Tpng graph.tmp -o graph.png && \
 | 
			
		||||
display graph.png
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
can be used to create and display an image representing the graph
 | 
			
		||||
described by the @var{GRAPH_DESCRIPTION} string.
 | 
			
		||||
 | 
			
		||||
@chapter Available video filters
 | 
			
		||||
 | 
			
		||||
When you configure your FFmpeg build, you can disable any of the
 | 
			
		||||
existing video filters.
 | 
			
		||||
The configure output will show the video filters included in your
 | 
			
		||||
build.
 | 
			
		||||
 | 
			
		||||
Below is a description of the currently available video filters.
 | 
			
		||||
 | 
			
		||||
@section crop
 | 
			
		||||
 | 
			
		||||
Crop the input video to @var{x}:@var{y}:@var{width}:@var{height}.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
./ffmpeg -i in.avi -vfilters "crop=0:0:0:240" out.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@var{x} and @var{y} specify the position of the top-left corner of the
 | 
			
		||||
output (non-cropped) area.
 | 
			
		||||
 | 
			
		||||
The default value of @var{x} and @var{y} is 0.
 | 
			
		||||
 | 
			
		||||
The @var{width} and @var{height} parameters specify the width and height
 | 
			
		||||
of the output (non-cropped) area.
 | 
			
		||||
 | 
			
		||||
A value of 0 is interpreted as the maximum possible size contained in
 | 
			
		||||
the area delimited by the top-left corner at position x:y.
 | 
			
		||||
 | 
			
		||||
For example the parameters:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
"crop=100:100:0:0"
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
will delimit the rectangle with the top-left corner placed at position
 | 
			
		||||
100:100 and the right-bottom corner corresponding to the right-bottom
 | 
			
		||||
corner of the input image.
 | 
			
		||||
 | 
			
		||||
The default value of @var{width} and @var{height} is 0.
 | 
			
		||||
 | 
			
		||||
@section format
 | 
			
		||||
 | 
			
		||||
Convert the input video to one of the specified pixel formats.
 | 
			
		||||
Libavfilter will try to pick one that is supported for the input to
 | 
			
		||||
the next filter.
 | 
			
		||||
 | 
			
		||||
The filter accepts a list of pixel format names, separated by ``:'',
 | 
			
		||||
for example ``yuv420p:monow:rgb24''.
 | 
			
		||||
 | 
			
		||||
The following command:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
./ffmpeg -i in.avi -vfilters "format=yuv420p" out.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
will convert the input video to the format ``yuv420p''.
 | 
			
		||||
 | 
			
		||||
@section noformat
 | 
			
		||||
 | 
			
		||||
Force libavfilter not to use any of the specified pixel formats for the
 | 
			
		||||
input to the next filter.
 | 
			
		||||
 | 
			
		||||
The filter accepts a list of pixel format names, separated by ``:'',
 | 
			
		||||
for example ``yuv420p:monow:rgb24''.
 | 
			
		||||
 | 
			
		||||
The following command:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
./ffmpeg -i in.avi -vfilters "noformat=yuv420p, vflip" out.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
will make libavfilter use a format different from ``yuv420p'' for the
 | 
			
		||||
input to the vflip filter.
 | 
			
		||||
 | 
			
		||||
@section null
 | 
			
		||||
 | 
			
		||||
Pass the source unchanged to the output.
 | 
			
		||||
 | 
			
		||||
@section scale
 | 
			
		||||
 | 
			
		||||
Scale the input video to @var{width}:@var{height} and/or convert the image format.
 | 
			
		||||
 | 
			
		||||
For example the command:
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
./ffmpeg -i in.avi -vfilters "scale=200:100" out.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
will scale the input video to a size of 200x100.
 | 
			
		||||
 | 
			
		||||
If the input image format is different from the format requested by
 | 
			
		||||
the next filter, the scale filter will convert the input to the
 | 
			
		||||
requested format.
 | 
			
		||||
 | 
			
		||||
If the value for @var{width} or @var{height} is 0, the respective input
 | 
			
		||||
size is used for the output.
 | 
			
		||||
 | 
			
		||||
If the value for @var{width} or @var{height} is -1, the scale filter will
 | 
			
		||||
use, for the respective output size, a value that maintains the aspect
 | 
			
		||||
ratio of the input image.
 | 
			
		||||
 | 
			
		||||
The default value of @var{width} and @var{height} is 0.
 | 
			
		||||
 | 
			
		||||
@section slicify
 | 
			
		||||
 | 
			
		||||
Pass the images of input video on to next video filter as multiple
 | 
			
		||||
slices.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
./ffmpeg -i in.avi -vfilters "slicify=32" out.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
The filter accepts the slice height as parameter. If the parameter is
 | 
			
		||||
not specified it will use the default value of 16.
 | 
			
		||||
 | 
			
		||||
Adding this in the beginning of filter chains should make filtering
 | 
			
		||||
faster due to better use of the memory cache.
 | 
			
		||||
 | 
			
		||||
@section unsharp
 | 
			
		||||
 | 
			
		||||
Sharpen or blur the input video. It accepts the following parameters:
 | 
			
		||||
 | 
			
		||||
@multitable @columnfractions .2 .5 .1 .1 .1
 | 
			
		||||
@headitem Name @tab Description @tab Min @tab Max @tab Default
 | 
			
		||||
@item @var{luma_msize_x}
 | 
			
		||||
@tab Luma matrix horizontal size
 | 
			
		||||
@tab 3
 | 
			
		||||
@tab 13
 | 
			
		||||
@tab 5
 | 
			
		||||
@item @var{luma_msize_y}
 | 
			
		||||
@tab Luma matrix vertical size
 | 
			
		||||
@tab 3
 | 
			
		||||
@tab 13
 | 
			
		||||
@tab 5
 | 
			
		||||
@item @var{luma_amount}
 | 
			
		||||
@tab Luma effect strength
 | 
			
		||||
@tab -2.0
 | 
			
		||||
@tab 5.0
 | 
			
		||||
@tab 1.0
 | 
			
		||||
@item @var{chroma_msize_x}
 | 
			
		||||
@tab Chroma matrix horizontal size
 | 
			
		||||
@tab 3
 | 
			
		||||
@tab 13
 | 
			
		||||
@tab 0
 | 
			
		||||
@item @var{chroma_msize_y}
 | 
			
		||||
@tab Chroma matrix vertical size
 | 
			
		||||
@tab 3
 | 
			
		||||
@tab 13
 | 
			
		||||
@tab 0
 | 
			
		||||
@item @var{chroma_amount}
 | 
			
		||||
@tab Chroma effect strength
 | 
			
		||||
@tab -2.0
 | 
			
		||||
@tab 5.0
 | 
			
		||||
@tab 0.0
 | 
			
		||||
@end multitable
 | 
			
		||||
 | 
			
		||||
Negative values for the amount will blur the input video, while positive
 | 
			
		||||
values will sharpen. All parameters are optional and default to the
 | 
			
		||||
equivalent of the string '5:5:1.0:0:0:0.0'.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
# Strong luma sharpen effect parameters
 | 
			
		||||
unsharp=7:7:2.5
 | 
			
		||||
 | 
			
		||||
# Strong blur of both luma and chroma parameters
 | 
			
		||||
unsharp=7:7:-2:7:7:-2
 | 
			
		||||
 | 
			
		||||
# Use the default values with @command{ffmpeg}
 | 
			
		||||
./ffmpeg -i in.avi -vfilters "unsharp" out.mp4
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section vflip
 | 
			
		||||
 | 
			
		||||
Flip the input video vertically.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
./ffmpeg -i in.avi -vfilters "vflip" out.avi
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@chapter Available video sources
 | 
			
		||||
 | 
			
		||||
Below is a description of the currently available video sources.
 | 
			
		||||
 | 
			
		||||
@section nullsrc
 | 
			
		||||
 | 
			
		||||
Null video source, never return images. It is mainly useful as a
 | 
			
		||||
template and to be employed in analysis / debugging tools.
 | 
			
		||||
 | 
			
		||||
It accepts as optional parameter a string of the form
 | 
			
		||||
@var{width}:@var{height}, where @var{width} and @var{height} specify the size of
 | 
			
		||||
the configured source.
 | 
			
		||||
 | 
			
		||||
The default values of @var{width} and @var{height} are respectively 352
 | 
			
		||||
and 288 (corresponding to the CIF size format).
 | 
			
		||||
 | 
			
		||||
@chapter Available video sinks
 | 
			
		||||
 | 
			
		||||
Below is a description of the currently available video sinks.
 | 
			
		||||
 | 
			
		||||
@section nullsink
 | 
			
		||||
 | 
			
		||||
Null video sink, do absolutely nothing with the input video. It is
 | 
			
		||||
mainly useful as a template and to be employed in analysis / debugging
 | 
			
		||||
tools.
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
 
 | 
			
		||||
@@ -1,48 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle Libavformat Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{Libavformat Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
The libavformat library provides a generic framework for multiplexing
 | 
			
		||||
and demultiplexing (muxing and demuxing) audio, video and subtitle
 | 
			
		||||
streams. It encompasses multiple muxers and demuxers for multimedia
 | 
			
		||||
container formats.
 | 
			
		||||
 | 
			
		||||
It also supports several input and output protocols to access a media
 | 
			
		||||
resource.
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{ffmpeg-formats.html,ffmpeg-formats}, @url{ffmpeg-protocols.html,ffmpeg-protocols},
 | 
			
		||||
@url{libavutil.html,libavutil}, @url{libavcodec.html,libavcodec}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1),
 | 
			
		||||
ffmpeg-formats(1), ffmpeg-protocols(1),
 | 
			
		||||
libavutil(3), libavcodec(3)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename libavformat
 | 
			
		||||
@settitle multimedia muxing and demuxing library
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
@@ -1,44 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle Libavutil Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{Libavutil Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
The libavutil library is a utility library to aid portable
 | 
			
		||||
multimedia programming. It contains safe portable string functions,
 | 
			
		||||
random number generators, data structures, additional mathematics
 | 
			
		||||
functions, cryptography and multimedia related functionality (like
 | 
			
		||||
enumerations for pixel and sample formats).
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{ffmpeg-utils.html,ffmpeg-utils}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1),
 | 
			
		||||
ffmpeg-utils(1)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename libavutil
 | 
			
		||||
@settitle multimedia-biased utility library
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
@@ -1,70 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle Libswresample Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{Libswresample Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
The libswresample library performs highly optimized audio resampling,
 | 
			
		||||
rematrixing and sample format conversion operations.
 | 
			
		||||
 | 
			
		||||
Specifically, this library performs the following conversions:
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
@item
 | 
			
		||||
@emph{Resampling}: is the process of changing the audio rate, for
 | 
			
		||||
example from an high sample rate of 44100Hz to 8000Hz. Audio
 | 
			
		||||
conversion from high to low sample rate is a lossy process. Several
 | 
			
		||||
resampling options and algorithms are available.
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
@emph{Format conversion}: is the process of converting the type of
 | 
			
		||||
samples, for example from 16-bit signed samples to unsigned 8-bit or
 | 
			
		||||
float samples. It also handles packing conversion, when passing from
 | 
			
		||||
packed layout (all samples belonging to distinct channels interleaved
 | 
			
		||||
in the same buffer), to planar layout (all samples belonging to the
 | 
			
		||||
same channel stored in a dedicated buffer or "plane").
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
@emph{Rematrixing}: is the process of changing the channel layout, for
 | 
			
		||||
example from stereo to mono. When the input channels cannot be mapped
 | 
			
		||||
to the output streams, the process is lossy, since it involves
 | 
			
		||||
different gain factors and mixing.
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
Various other audio conversions (e.g. stretching and padding) are
 | 
			
		||||
enabled through dedicated options.
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{ffmpeg-resampler.html,ffmpeg-resampler},
 | 
			
		||||
@url{libavutil.html,libavutil}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1),
 | 
			
		||||
ffmpeg-resampler(1),
 | 
			
		||||
libavutil(3)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename libswresample
 | 
			
		||||
@settitle audio resampling library
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
@@ -1,63 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle Libswscale Documentation
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{Libswscale Documentation}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
@c man begin DESCRIPTION
 | 
			
		||||
 | 
			
		||||
The libswscale library performs highly optimized image scaling and
 | 
			
		||||
colorspace and pixel format conversion operations.
 | 
			
		||||
 | 
			
		||||
Specifically, this library performs the following conversions:
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
@item
 | 
			
		||||
@emph{Rescaling}: is the process of changing the video size. Several
 | 
			
		||||
rescaling options and algorithms are available. This is usually a
 | 
			
		||||
lossy process.
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
@emph{Pixel format conversion}: is the process of converting the image
 | 
			
		||||
format and colorspace of the image, for example from planar YUV420P to
 | 
			
		||||
RGB24 packed. It also handles packing conversion, that is converts
 | 
			
		||||
from packed layout (all pixels belonging to distinct planes
 | 
			
		||||
interleaved in the same buffer), to planar layout (all samples
 | 
			
		||||
belonging to the same plane stored in a dedicated buffer or "plane").
 | 
			
		||||
 | 
			
		||||
This is usually a lossy process in case the source and destination
 | 
			
		||||
colorspaces differ.
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@c man end DESCRIPTION
 | 
			
		||||
 | 
			
		||||
@chapter See Also
 | 
			
		||||
 | 
			
		||||
@ifhtml
 | 
			
		||||
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 | 
			
		||||
@url{ffmpeg-scaler.html,ffmpeg-scaler},
 | 
			
		||||
@url{libavutil.html,libavutil}
 | 
			
		||||
@end ifhtml
 | 
			
		||||
 | 
			
		||||
@ifnothtml
 | 
			
		||||
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1),
 | 
			
		||||
ffmpeg-scaler(1),
 | 
			
		||||
libavutil(3)
 | 
			
		||||
@end ifnothtml
 | 
			
		||||
 | 
			
		||||
@include authors.texi
 | 
			
		||||
 | 
			
		||||
@ignore
 | 
			
		||||
 | 
			
		||||
@setfilename libswscale
 | 
			
		||||
@settitle video scaling and pixel format conversion library
 | 
			
		||||
 | 
			
		||||
@end ignore
 | 
			
		||||
 | 
			
		||||
@bye
 | 
			
		||||
@@ -1,68 +0,0 @@
 | 
			
		||||
@chapter Metadata
 | 
			
		||||
@c man begin METADATA
 | 
			
		||||
 | 
			
		||||
FFmpeg is able to dump metadata from media files into a simple UTF-8-encoded
 | 
			
		||||
INI-like text file and then load it back using the metadata muxer/demuxer.
 | 
			
		||||
 | 
			
		||||
The file format is as follows:
 | 
			
		||||
@enumerate
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
A file consists of a header and a number of metadata tags divided into sections,
 | 
			
		||||
each on its own line.
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
The header is a ';FFMETADATA' string, followed by a version number (now 1).
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Metadata tags are of the form 'key=value'
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Immediately after header follows global metadata
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
After global metadata there may be sections with per-stream/per-chapter
 | 
			
		||||
metadata.
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
A section starts with the section name in uppercase (i.e. STREAM or CHAPTER) in
 | 
			
		||||
brackets ('[', ']') and ends with next section or end of file.
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
At the beginning of a chapter section there may be an optional timebase to be
 | 
			
		||||
used for start/end values. It must be in form 'TIMEBASE=num/den', where num and
 | 
			
		||||
den are integers. If the timebase is missing then start/end times are assumed to
 | 
			
		||||
be in milliseconds.
 | 
			
		||||
Next a chapter section must contain chapter start and end times in form
 | 
			
		||||
'START=num', 'END=num', where num is a positive integer.
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Empty lines and lines starting with ';' or '#' are ignored.
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Metadata keys or values containing special characters ('=', ';', '#', '\' and a
 | 
			
		||||
newline) must be escaped with a backslash '\'.
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Note that whitespace in metadata (e.g. foo = bar) is considered to be a part of
 | 
			
		||||
the tag (in the example above key is 'foo ', value is ' bar').
 | 
			
		||||
@end enumerate
 | 
			
		||||
 | 
			
		||||
A ffmetadata file might look like this:
 | 
			
		||||
@example
 | 
			
		||||
;FFMETADATA1
 | 
			
		||||
title=bike\\shed
 | 
			
		||||
;this is a comment
 | 
			
		||||
artist=FFmpeg troll team
 | 
			
		||||
 | 
			
		||||
[CHAPTER]
 | 
			
		||||
TIMEBASE=1/1000
 | 
			
		||||
START=0
 | 
			
		||||
#chapter ends at 0:01:00
 | 
			
		||||
END=60000
 | 
			
		||||
title=chapter \#1
 | 
			
		||||
[STREAM]
 | 
			
		||||
title=multi\
 | 
			
		||||
line
 | 
			
		||||
@end example
 | 
			
		||||
@c man end METADATA
 | 
			
		||||
							
								
								
									
										67
									
								
								doc/mips.txt
									
									
									
									
									
								
							
							
						
						
									
										67
									
								
								doc/mips.txt
									
									
									
									
									
								
							@@ -1,67 +0,0 @@
 | 
			
		||||
MIPS optimizations info
 | 
			
		||||
===============================================
 | 
			
		||||
 | 
			
		||||
MIPS optimizations of codecs are targeting MIPS 74k family of
 | 
			
		||||
CPUs. Some of these optimizations are relying more on properties of
 | 
			
		||||
this architecture and some are relying less (and can be used on most
 | 
			
		||||
MIPS architectures without degradation in performance).
 | 
			
		||||
 | 
			
		||||
Along with FFMPEG copyright notice, there is MIPS copyright notice in
 | 
			
		||||
all the files that are created by people from MIPS Technologies.
 | 
			
		||||
 | 
			
		||||
Example of copyright notice:
 | 
			
		||||
===============================================
 | 
			
		||||
/*
 | 
			
		||||
 * Copyright (c) 2012
 | 
			
		||||
 *      MIPS Technologies, Inc., California.
 | 
			
		||||
 *
 | 
			
		||||
 * Redistribution and use in source and binary forms, with or without
 | 
			
		||||
 * modification, are permitted provided that the following conditions
 | 
			
		||||
 * are met:
 | 
			
		||||
 * 1. Redistributions of source code must retain the above copyright
 | 
			
		||||
 *    notice, this list of conditions and the following disclaimer.
 | 
			
		||||
 * 2. Redistributions in binary form must reproduce the above copyright
 | 
			
		||||
 *    notice, this list of conditions and the following disclaimer in the
 | 
			
		||||
 *    documentation and/or other materials provided with the distribution.
 | 
			
		||||
 * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
 | 
			
		||||
 *    contributors may be used to endorse or promote products derived from
 | 
			
		||||
 *    this software without specific prior written permission.
 | 
			
		||||
 *
 | 
			
		||||
 * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
 | 
			
		||||
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 | 
			
		||||
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 | 
			
		||||
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
 | 
			
		||||
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 | 
			
		||||
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 | 
			
		||||
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 | 
			
		||||
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 | 
			
		||||
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 | 
			
		||||
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 | 
			
		||||
 * SUCH DAMAGE.
 | 
			
		||||
 *
 | 
			
		||||
 * Author:  Author Name (author_name@@mips.com)
 | 
			
		||||
 */
 | 
			
		||||
 | 
			
		||||
Files that have MIPS copyright notice in them:
 | 
			
		||||
===============================================
 | 
			
		||||
* libavutil/mips/
 | 
			
		||||
      float_dsp_mips.c
 | 
			
		||||
      libm_mips.h
 | 
			
		||||
* libavcodec/mips/
 | 
			
		||||
      ac3dsp_mips.c
 | 
			
		||||
      acelp_filters_mips.c
 | 
			
		||||
      acelp_vectors_mips.c
 | 
			
		||||
      amrwbdec_mips.c
 | 
			
		||||
      amrwbdec_mips.h
 | 
			
		||||
      celp_filters_mips.c
 | 
			
		||||
      celp_math_mips.c
 | 
			
		||||
      compute_antialias_fixed.h
 | 
			
		||||
      compute_antialias_float.h
 | 
			
		||||
      lsp_mips.h
 | 
			
		||||
      dsputil_mips.c
 | 
			
		||||
      fft_mips.c
 | 
			
		||||
      fft_table.h
 | 
			
		||||
      fft_init_table.c
 | 
			
		||||
      fmtconvert_mips.c
 | 
			
		||||
      mpegaudiodsp_mips_fixed.c
 | 
			
		||||
      mpegaudiodsp_mips_float.c
 | 
			
		||||
@@ -1,65 +0,0 @@
 | 
			
		||||
FFmpeg multithreading methods
 | 
			
		||||
==============================================
 | 
			
		||||
 | 
			
		||||
FFmpeg provides two methods for multithreading codecs.
 | 
			
		||||
 | 
			
		||||
Slice threading decodes multiple parts of a frame at the same time, using
 | 
			
		||||
AVCodecContext execute() and execute2().
 | 
			
		||||
 | 
			
		||||
Frame threading decodes multiple frames at the same time.
 | 
			
		||||
It accepts N future frames and delays decoded pictures by N-1 frames.
 | 
			
		||||
The later frames are decoded in separate threads while the user is
 | 
			
		||||
displaying the current one.
 | 
			
		||||
 | 
			
		||||
Restrictions on clients
 | 
			
		||||
==============================================
 | 
			
		||||
 | 
			
		||||
Slice threading -
 | 
			
		||||
* The client's draw_horiz_band() must be thread-safe according to the comment
 | 
			
		||||
  in avcodec.h.
 | 
			
		||||
 | 
			
		||||
Frame threading -
 | 
			
		||||
* Restrictions with slice threading also apply.
 | 
			
		||||
* For best performance, the client should set thread_safe_callbacks if it
 | 
			
		||||
  provides a thread-safe get_buffer() callback.
 | 
			
		||||
* There is one frame of delay added for every thread beyond the first one.
 | 
			
		||||
  Clients must be able to handle this; the pkt_dts and pkt_pts fields in
 | 
			
		||||
  AVFrame will work as usual.
 | 
			
		||||
 | 
			
		||||
Restrictions on codec implementations
 | 
			
		||||
==============================================
 | 
			
		||||
 | 
			
		||||
Slice threading -
 | 
			
		||||
 None except that there must be something worth executing in parallel.
 | 
			
		||||
 | 
			
		||||
Frame threading -
 | 
			
		||||
* Codecs can only accept entire pictures per packet.
 | 
			
		||||
* Codecs similar to ffv1, whose streams don't reset across frames,
 | 
			
		||||
  will not work because their bitstreams cannot be decoded in parallel.
 | 
			
		||||
 | 
			
		||||
* The contents of buffers must not be read before ff_thread_await_progress()
 | 
			
		||||
  has been called on them. reget_buffer() and buffer age optimizations no longer work.
 | 
			
		||||
* The contents of buffers must not be written to after ff_thread_report_progress()
 | 
			
		||||
  has been called on them. This includes draw_edges().
 | 
			
		||||
 | 
			
		||||
Porting codecs to frame threading
 | 
			
		||||
==============================================
 | 
			
		||||
 | 
			
		||||
Find all context variables that are needed by the next frame. Move all
 | 
			
		||||
code changing them, as well as code calling get_buffer(), up to before
 | 
			
		||||
the decode process starts. Call ff_thread_finish_setup() afterwards. If
 | 
			
		||||
some code can't be moved, have update_thread_context() run it in the next
 | 
			
		||||
thread.
 | 
			
		||||
 | 
			
		||||
If the codec allocates writable tables in its init(), add an init_thread_copy()
 | 
			
		||||
which re-allocates them for other threads.
 | 
			
		||||
 | 
			
		||||
Add CODEC_CAP_FRAME_THREADS to the codec capabilities. There will be very little
 | 
			
		||||
speed gain at this point but it should work.
 | 
			
		||||
 | 
			
		||||
Call ff_thread_report_progress() after some part of the current picture has decoded.
 | 
			
		||||
A good place to put this is where draw_horiz_band() is called - add this if it isn't
 | 
			
		||||
called anywhere, as it's useful too and the implementation is trivial when you're
 | 
			
		||||
doing this. Note that draw_edges() needs to be called before reporting progress.
 | 
			
		||||
 | 
			
		||||
Before accessing a reference frame or its MVs, call ff_thread_await_progress().
 | 
			
		||||
							
								
								
									
										738
									
								
								doc/muxers.texi
									
									
									
									
									
								
							
							
						
						
									
										738
									
								
								doc/muxers.texi
									
									
									
									
									
								
							@@ -1,738 +0,0 @@
 | 
			
		||||
@chapter Muxers
 | 
			
		||||
@c man begin MUXERS
 | 
			
		||||
 | 
			
		||||
Muxers are configured elements in FFmpeg which allow writing
 | 
			
		||||
multimedia streams to a particular type of file.
 | 
			
		||||
 | 
			
		||||
When you configure your FFmpeg build, all the supported muxers
 | 
			
		||||
are enabled by default. You can list all available muxers using the
 | 
			
		||||
configure option @code{--list-muxers}.
 | 
			
		||||
 | 
			
		||||
You can disable all the muxers with the configure option
 | 
			
		||||
@code{--disable-muxers} and selectively enable / disable single muxers
 | 
			
		||||
with the options @code{--enable-muxer=@var{MUXER}} /
 | 
			
		||||
@code{--disable-muxer=@var{MUXER}}.
 | 
			
		||||
 | 
			
		||||
The option @code{-formats} of the ff* tools will display the list of
 | 
			
		||||
enabled muxers.
 | 
			
		||||
 | 
			
		||||
A description of some of the currently available muxers follows.
 | 
			
		||||
 | 
			
		||||
@anchor{aiff}
 | 
			
		||||
@section aiff
 | 
			
		||||
 | 
			
		||||
Audio Interchange File Format muxer.
 | 
			
		||||
 | 
			
		||||
It accepts the following options:
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item write_id3v2
 | 
			
		||||
Enable ID3v2 tags writing when set to 1. Default is 0 (disabled).
 | 
			
		||||
 | 
			
		||||
@item id3v2_version
 | 
			
		||||
Select ID3v2 version to write. Currently only version 3 and 4 (aka.
 | 
			
		||||
ID3v2.3 and ID3v2.4) are supported. The default is version 4.
 | 
			
		||||
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@anchor{crc}
 | 
			
		||||
@section crc
 | 
			
		||||
 | 
			
		||||
CRC (Cyclic Redundancy Check) testing format.
 | 
			
		||||
 | 
			
		||||
This muxer computes and prints the Adler-32 CRC of all the input audio
 | 
			
		||||
and video frames. By default audio frames are converted to signed
 | 
			
		||||
16-bit raw audio and video frames to raw video before computing the
 | 
			
		||||
CRC.
 | 
			
		||||
 | 
			
		||||
The output of the muxer consists of a single line of the form:
 | 
			
		||||
CRC=0x@var{CRC}, where @var{CRC} is a hexadecimal number 0-padded to
 | 
			
		||||
8 digits containing the CRC for all the decoded input frames.
 | 
			
		||||
 | 
			
		||||
For example to compute the CRC of the input, and store it in the file
 | 
			
		||||
@file{out.crc}:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -f crc out.crc
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
You can print the CRC to stdout with the command:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -f crc -
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
You can select the output format of each frame with @command{ffmpeg} by
 | 
			
		||||
specifying the audio and video codec and format. For example to
 | 
			
		||||
compute the CRC of the input audio converted to PCM unsigned 8-bit
 | 
			
		||||
and the input video converted to MPEG-2 video, use the command:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -c:a pcm_u8 -c:v mpeg2video -f crc -
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
See also the @ref{framecrc} muxer.
 | 
			
		||||
 | 
			
		||||
@anchor{framecrc}
 | 
			
		||||
@section framecrc
 | 
			
		||||
 | 
			
		||||
Per-packet CRC (Cyclic Redundancy Check) testing format.
 | 
			
		||||
 | 
			
		||||
This muxer computes and prints the Adler-32 CRC for each audio
 | 
			
		||||
and video packet. By default audio frames are converted to signed
 | 
			
		||||
16-bit raw audio and video frames to raw video before computing the
 | 
			
		||||
CRC.
 | 
			
		||||
 | 
			
		||||
The output of the muxer consists of a line for each audio and video
 | 
			
		||||
packet of the form:
 | 
			
		||||
@example
 | 
			
		||||
@var{stream_index}, @var{packet_dts}, @var{packet_pts}, @var{packet_duration}, @var{packet_size}, 0x@var{CRC}
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@var{CRC} is a hexadecimal number 0-padded to 8 digits containing the
 | 
			
		||||
CRC of the packet.
 | 
			
		||||
 | 
			
		||||
For example to compute the CRC of the audio and video frames in
 | 
			
		||||
@file{INPUT}, converted to raw audio and video packets, and store it
 | 
			
		||||
in the file @file{out.crc}:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -f framecrc out.crc
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
To print the information to stdout, use the command:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -f framecrc -
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
With @command{ffmpeg}, you can select the output format to which the
 | 
			
		||||
audio and video frames are encoded before computing the CRC for each
 | 
			
		||||
packet by specifying the audio and video codec. For example, to
 | 
			
		||||
compute the CRC of each decoded input audio frame converted to PCM
 | 
			
		||||
unsigned 8-bit and of each decoded input video frame converted to
 | 
			
		||||
MPEG-2 video, use the command:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -c:a pcm_u8 -c:v mpeg2video -f framecrc -
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
See also the @ref{crc} muxer.
 | 
			
		||||
 | 
			
		||||
@anchor{framemd5}
 | 
			
		||||
@section framemd5
 | 
			
		||||
 | 
			
		||||
Per-packet MD5 testing format.
 | 
			
		||||
 | 
			
		||||
This muxer computes and prints the MD5 hash for each audio
 | 
			
		||||
and video packet. By default audio frames are converted to signed
 | 
			
		||||
16-bit raw audio and video frames to raw video before computing the
 | 
			
		||||
hash.
 | 
			
		||||
 | 
			
		||||
The output of the muxer consists of a line for each audio and video
 | 
			
		||||
packet of the form:
 | 
			
		||||
@example
 | 
			
		||||
@var{stream_index}, @var{packet_dts}, @var{packet_pts}, @var{packet_duration}, @var{packet_size}, @var{MD5}
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@var{MD5} is a hexadecimal number representing the computed MD5 hash
 | 
			
		||||
for the packet.
 | 
			
		||||
 | 
			
		||||
For example to compute the MD5 of the audio and video frames in
 | 
			
		||||
@file{INPUT}, converted to raw audio and video packets, and store it
 | 
			
		||||
in the file @file{out.md5}:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -f framemd5 out.md5
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
To print the information to stdout, use the command:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -f framemd5 -
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
See also the @ref{md5} muxer.
 | 
			
		||||
 | 
			
		||||
@anchor{hls}
 | 
			
		||||
@section hls
 | 
			
		||||
 | 
			
		||||
Apple HTTP Live Streaming muxer that segments MPEG-TS according to
 | 
			
		||||
the HTTP Live Streaming specification.
 | 
			
		||||
 | 
			
		||||
It creates a playlist file and numbered segment files. The output
 | 
			
		||||
filename specifies the playlist filename; the segment filenames
 | 
			
		||||
receive the same basename as the playlist, a sequential number and
 | 
			
		||||
a .ts extension.
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i in.nut out.m3u8
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item -hls_time @var{seconds}
 | 
			
		||||
Set the segment length in seconds.
 | 
			
		||||
@item -hls_list_size @var{size}
 | 
			
		||||
Set the maximum number of playlist entries.
 | 
			
		||||
@item -hls_wrap @var{wrap}
 | 
			
		||||
Set the number after which index wraps.
 | 
			
		||||
@item -start_number @var{number}
 | 
			
		||||
Start the sequence from @var{number}.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@anchor{ico}
 | 
			
		||||
@section ico
 | 
			
		||||
 | 
			
		||||
ICO file muxer.
 | 
			
		||||
 | 
			
		||||
Microsoft's icon file format (ICO) has some strict limitations that should be noted:
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
@item
 | 
			
		||||
Size cannot exceed 256 pixels in any dimension
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Only BMP and PNG images can be stored
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
If a BMP image is used, it must be one of the following pixel formats:
 | 
			
		||||
@example
 | 
			
		||||
BMP Bit Depth      FFmpeg Pixel Format
 | 
			
		||||
1bit               pal8
 | 
			
		||||
4bit               pal8
 | 
			
		||||
8bit               pal8
 | 
			
		||||
16bit              rgb555le
 | 
			
		||||
24bit              bgr24
 | 
			
		||||
32bit              bgra
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
If a BMP image is used, it must use the BITMAPINFOHEADER DIB header
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
If a PNG image is used, it must use the rgba pixel format
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@anchor{image2}
 | 
			
		||||
@section image2
 | 
			
		||||
 | 
			
		||||
Image file muxer.
 | 
			
		||||
 | 
			
		||||
The image file muxer writes video frames to image files.
 | 
			
		||||
 | 
			
		||||
The output filenames are specified by a pattern, which can be used to
 | 
			
		||||
produce sequentially numbered series of files.
 | 
			
		||||
The pattern may contain the string "%d" or "%0@var{N}d", this string
 | 
			
		||||
specifies the position of the characters representing a numbering in
 | 
			
		||||
the filenames. If the form "%0@var{N}d" is used, the string
 | 
			
		||||
representing the number in each filename is 0-padded to @var{N}
 | 
			
		||||
digits. The literal character '%' can be specified in the pattern with
 | 
			
		||||
the string "%%".
 | 
			
		||||
 | 
			
		||||
If the pattern contains "%d" or "%0@var{N}d", the first filename of
 | 
			
		||||
the file list specified will contain the number 1, all the following
 | 
			
		||||
numbers will be sequential.
 | 
			
		||||
 | 
			
		||||
The pattern may contain a suffix which is used to automatically
 | 
			
		||||
determine the format of the image files to write.
 | 
			
		||||
 | 
			
		||||
For example the pattern "img-%03d.bmp" will specify a sequence of
 | 
			
		||||
filenames of the form @file{img-001.bmp}, @file{img-002.bmp}, ...,
 | 
			
		||||
@file{img-010.bmp}, etc.
 | 
			
		||||
The pattern "img%%-%d.jpg" will specify a sequence of filenames of the
 | 
			
		||||
form @file{img%-1.jpg}, @file{img%-2.jpg}, ..., @file{img%-10.jpg},
 | 
			
		||||
etc.
 | 
			
		||||
 | 
			
		||||
The following example shows how to use @command{ffmpeg} for creating a
 | 
			
		||||
sequence of files @file{img-001.jpeg}, @file{img-002.jpeg}, ...,
 | 
			
		||||
taking one image every second from the input video:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i in.avi -vsync 1 -r 1 -f image2 'img-%03d.jpeg'
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Note that with @command{ffmpeg}, if the format is not specified with the
 | 
			
		||||
@code{-f} option and the output filename specifies an image file
 | 
			
		||||
format, the image2 muxer is automatically selected, so the previous
 | 
			
		||||
command can be written as:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i in.avi -vsync 1 -r 1 'img-%03d.jpeg'
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Note also that the pattern must not necessarily contain "%d" or
 | 
			
		||||
"%0@var{N}d", for example to create a single image file
 | 
			
		||||
@file{img.jpeg} from the input video you can employ the command:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i in.avi -f image2 -frames:v 1 img.jpeg
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item -start_number @var{number}
 | 
			
		||||
Start the sequence from @var{number}.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
The image muxer supports the .Y.U.V image file format. This format is
 | 
			
		||||
special in that that each image frame consists of three files, for
 | 
			
		||||
each of the YUV420P components. To read or write this image file format,
 | 
			
		||||
specify the name of the '.Y' file. The muxer will automatically open the
 | 
			
		||||
'.U' and '.V' files as required.
 | 
			
		||||
 | 
			
		||||
@anchor{md5}
 | 
			
		||||
@section md5
 | 
			
		||||
 | 
			
		||||
MD5 testing format.
 | 
			
		||||
 | 
			
		||||
This muxer computes and prints the MD5 hash of all the input audio
 | 
			
		||||
and video frames. By default audio frames are converted to signed
 | 
			
		||||
16-bit raw audio and video frames to raw video before computing the
 | 
			
		||||
hash.
 | 
			
		||||
 | 
			
		||||
The output of the muxer consists of a single line of the form:
 | 
			
		||||
MD5=@var{MD5}, where @var{MD5} is a hexadecimal number representing
 | 
			
		||||
the computed MD5 hash.
 | 
			
		||||
 | 
			
		||||
For example to compute the MD5 hash of the input converted to raw
 | 
			
		||||
audio and video, and store it in the file @file{out.md5}:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -f md5 out.md5
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
You can print the MD5 to stdout with the command:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -f md5 -
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
See also the @ref{framemd5} muxer.
 | 
			
		||||
 | 
			
		||||
@section MOV/MP4/ISMV
 | 
			
		||||
 | 
			
		||||
The mov/mp4/ismv muxer supports fragmentation. Normally, a MOV/MP4
 | 
			
		||||
file has all the metadata about all packets stored in one location
 | 
			
		||||
(written at the end of the file, it can be moved to the start for
 | 
			
		||||
better playback by adding @var{faststart} to the @var{movflags}, or
 | 
			
		||||
using the @command{qt-faststart} tool). A fragmented
 | 
			
		||||
file consists of a number of fragments, where packets and metadata
 | 
			
		||||
about these packets are stored together. Writing a fragmented
 | 
			
		||||
file has the advantage that the file is decodable even if the
 | 
			
		||||
writing is interrupted (while a normal MOV/MP4 is undecodable if
 | 
			
		||||
it is not properly finished), and it requires less memory when writing
 | 
			
		||||
very long files (since writing normal MOV/MP4 files stores info about
 | 
			
		||||
every single packet in memory until the file is closed). The downside
 | 
			
		||||
is that it is less compatible with other applications.
 | 
			
		||||
 | 
			
		||||
Fragmentation is enabled by setting one of the AVOptions that define
 | 
			
		||||
how to cut the file into fragments:
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item -moov_size @var{bytes}
 | 
			
		||||
Reserves space for the moov atom at the beginning of the file instead of placing the
 | 
			
		||||
moov atom at the end. If the space reserved is insufficient, muxing will fail.
 | 
			
		||||
@item -movflags frag_keyframe
 | 
			
		||||
Start a new fragment at each video keyframe.
 | 
			
		||||
@item -frag_duration @var{duration}
 | 
			
		||||
Create fragments that are @var{duration} microseconds long.
 | 
			
		||||
@item -frag_size @var{size}
 | 
			
		||||
Create fragments that contain up to @var{size} bytes of payload data.
 | 
			
		||||
@item -movflags frag_custom
 | 
			
		||||
Allow the caller to manually choose when to cut fragments, by
 | 
			
		||||
calling @code{av_write_frame(ctx, NULL)} to write a fragment with
 | 
			
		||||
the packets written so far. (This is only useful with other
 | 
			
		||||
applications integrating libavformat, not from @command{ffmpeg}.)
 | 
			
		||||
@item -min_frag_duration @var{duration}
 | 
			
		||||
Don't create fragments that are shorter than @var{duration} microseconds long.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
If more than one condition is specified, fragments are cut when
 | 
			
		||||
one of the specified conditions is fulfilled. The exception to this is
 | 
			
		||||
@code{-min_frag_duration}, which has to be fulfilled for any of the other
 | 
			
		||||
conditions to apply.
 | 
			
		||||
 | 
			
		||||
Additionally, the way the output file is written can be adjusted
 | 
			
		||||
through a few other options:
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item -movflags empty_moov
 | 
			
		||||
Write an initial moov atom directly at the start of the file, without
 | 
			
		||||
describing any samples in it. Generally, an mdat/moov pair is written
 | 
			
		||||
at the start of the file, as a normal MOV/MP4 file, containing only
 | 
			
		||||
a short portion of the file. With this option set, there is no initial
 | 
			
		||||
mdat atom, and the moov atom only describes the tracks but has
 | 
			
		||||
a zero duration.
 | 
			
		||||
 | 
			
		||||
Files written with this option set do not work in QuickTime.
 | 
			
		||||
This option is implicitly set when writing ismv (Smooth Streaming) files.
 | 
			
		||||
@item -movflags separate_moof
 | 
			
		||||
Write a separate moof (movie fragment) atom for each track. Normally,
 | 
			
		||||
packets for all tracks are written in a moof atom (which is slightly
 | 
			
		||||
more efficient), but with this option set, the muxer writes one moof/mdat
 | 
			
		||||
pair for each track, making it easier to separate tracks.
 | 
			
		||||
 | 
			
		||||
This option is implicitly set when writing ismv (Smooth Streaming) files.
 | 
			
		||||
@item -movflags faststart
 | 
			
		||||
Run a second pass moving the moov atom on top of the file. This
 | 
			
		||||
operation can take a while, and will not work in various situations such
 | 
			
		||||
as fragmented output, thus it is not enabled by default.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
Smooth Streaming content can be pushed in real time to a publishing
 | 
			
		||||
point on IIS with this muxer. Example:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -re @var{<normal input/transcoding options>} -movflags isml+frag_keyframe -f ismv http://server/publishingpoint.isml/Streams(Encoder1)
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section mpegts
 | 
			
		||||
 | 
			
		||||
MPEG transport stream muxer.
 | 
			
		||||
 | 
			
		||||
This muxer implements ISO 13818-1 and part of ETSI EN 300 468.
 | 
			
		||||
 | 
			
		||||
The muxer options are:
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item -mpegts_original_network_id @var{number}
 | 
			
		||||
Set the original_network_id (default 0x0001). This is unique identifier
 | 
			
		||||
of a network in DVB. Its main use is in the unique identification of a
 | 
			
		||||
service through the path Original_Network_ID, Transport_Stream_ID.
 | 
			
		||||
@item -mpegts_transport_stream_id @var{number}
 | 
			
		||||
Set the transport_stream_id (default 0x0001). This identifies a
 | 
			
		||||
transponder in DVB.
 | 
			
		||||
@item -mpegts_service_id @var{number}
 | 
			
		||||
Set the service_id (default 0x0001) also known as program in DVB.
 | 
			
		||||
@item -mpegts_pmt_start_pid @var{number}
 | 
			
		||||
Set the first PID for PMT (default 0x1000, max 0x1f00).
 | 
			
		||||
@item -mpegts_start_pid @var{number}
 | 
			
		||||
Set the first PID for data packets (default 0x0100, max 0x0f00).
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
The recognized metadata settings in mpegts muxer are @code{service_provider}
 | 
			
		||||
and @code{service_name}. If they are not set the default for
 | 
			
		||||
@code{service_provider} is "FFmpeg" and the default for
 | 
			
		||||
@code{service_name} is "Service01".
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i file.mpg -c copy \
 | 
			
		||||
     -mpegts_original_network_id 0x1122 \
 | 
			
		||||
     -mpegts_transport_stream_id 0x3344 \
 | 
			
		||||
     -mpegts_service_id 0x5566 \
 | 
			
		||||
     -mpegts_pmt_start_pid 0x1500 \
 | 
			
		||||
     -mpegts_start_pid 0x150 \
 | 
			
		||||
     -metadata service_provider="Some provider" \
 | 
			
		||||
     -metadata service_name="Some Channel" \
 | 
			
		||||
     -y out.ts
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section null
 | 
			
		||||
 | 
			
		||||
Null muxer.
 | 
			
		||||
 | 
			
		||||
This muxer does not generate any output file, it is mainly useful for
 | 
			
		||||
testing or benchmarking purposes.
 | 
			
		||||
 | 
			
		||||
For example to benchmark decoding with @command{ffmpeg} you can use the
 | 
			
		||||
command:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -benchmark -i INPUT -f null out.null
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
Note that the above command does not read or write the @file{out.null}
 | 
			
		||||
file, but specifying the output file is required by the @command{ffmpeg}
 | 
			
		||||
syntax.
 | 
			
		||||
 | 
			
		||||
Alternatively you can write the command as:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -benchmark -i INPUT -f null -
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section matroska
 | 
			
		||||
 | 
			
		||||
Matroska container muxer.
 | 
			
		||||
 | 
			
		||||
This muxer implements the matroska and webm container specs.
 | 
			
		||||
 | 
			
		||||
The recognized metadata settings in this muxer are:
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item title=@var{title name}
 | 
			
		||||
Name provided to a single track
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item language=@var{language name}
 | 
			
		||||
Specifies the language of the track in the Matroska languages form
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item stereo_mode=@var{mode}
 | 
			
		||||
Stereo 3D video layout of two views in a single video track
 | 
			
		||||
@table @option
 | 
			
		||||
@item mono
 | 
			
		||||
video is not stereo
 | 
			
		||||
@item left_right
 | 
			
		||||
Both views are arranged side by side, Left-eye view is on the left
 | 
			
		||||
@item bottom_top
 | 
			
		||||
Both views are arranged in top-bottom orientation, Left-eye view is at bottom
 | 
			
		||||
@item top_bottom
 | 
			
		||||
Both views are arranged in top-bottom orientation, Left-eye view is on top
 | 
			
		||||
@item checkerboard_rl
 | 
			
		||||
Each view is arranged in a checkerboard interleaved pattern, Left-eye view being first
 | 
			
		||||
@item checkerboard_lr
 | 
			
		||||
Each view is arranged in a checkerboard interleaved pattern, Right-eye view being first
 | 
			
		||||
@item row_interleaved_rl
 | 
			
		||||
Each view is constituted by a row based interleaving, Right-eye view is first row
 | 
			
		||||
@item row_interleaved_lr
 | 
			
		||||
Each view is constituted by a row based interleaving, Left-eye view is first row
 | 
			
		||||
@item col_interleaved_rl
 | 
			
		||||
Both views are arranged in a column based interleaving manner, Right-eye view is first column
 | 
			
		||||
@item col_interleaved_lr
 | 
			
		||||
Both views are arranged in a column based interleaving manner, Left-eye view is first column
 | 
			
		||||
@item anaglyph_cyan_red
 | 
			
		||||
All frames are in anaglyph format viewable through red-cyan filters
 | 
			
		||||
@item right_left
 | 
			
		||||
Both views are arranged side by side, Right-eye view is on the left
 | 
			
		||||
@item anaglyph_green_magenta
 | 
			
		||||
All frames are in anaglyph format viewable through green-magenta filters
 | 
			
		||||
@item block_lr
 | 
			
		||||
Both eyes laced in one Block, Left-eye view is first
 | 
			
		||||
@item block_rl
 | 
			
		||||
Both eyes laced in one Block, Right-eye view is first
 | 
			
		||||
@end table
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
For example a 3D WebM clip can be created using the following command line:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i sample_left_right_clip.mpg -an -c:v libvpx -metadata stereo_mode=left_right -y stereo_clip.webm
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section segment, stream_segment, ssegment
 | 
			
		||||
 | 
			
		||||
Basic stream segmenter.
 | 
			
		||||
 | 
			
		||||
The segmenter muxer outputs streams to a number of separate files of nearly
 | 
			
		||||
fixed duration. Output filename pattern can be set in a fashion similar to
 | 
			
		||||
@ref{image2}.
 | 
			
		||||
 | 
			
		||||
@code{stream_segment} is a variant of the muxer used to write to
 | 
			
		||||
streaming output formats, i.e. which do not require global headers,
 | 
			
		||||
and is recommended for outputting e.g. to MPEG transport stream segments.
 | 
			
		||||
@code{ssegment} is a shorter alias for @code{stream_segment}.
 | 
			
		||||
 | 
			
		||||
Every segment starts with a keyframe of the selected reference stream,
 | 
			
		||||
which is set through the @option{reference_stream} option.
 | 
			
		||||
 | 
			
		||||
Note that if you want accurate splitting for a video file, you need to
 | 
			
		||||
make the input key frames correspond to the exact splitting times
 | 
			
		||||
expected by the segmenter, or the segment muxer will start the new
 | 
			
		||||
segment with the key frame found next after the specified start
 | 
			
		||||
time.
 | 
			
		||||
 | 
			
		||||
The segment muxer works best with a single constant frame rate video.
 | 
			
		||||
 | 
			
		||||
Optionally it can generate a list of the created segments, by setting
 | 
			
		||||
the option @var{segment_list}. The list type is specified by the
 | 
			
		||||
@var{segment_list_type} option.
 | 
			
		||||
 | 
			
		||||
The segment muxer supports the following options:
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
@item reference_stream @var{specifier}
 | 
			
		||||
Set the reference stream, as specified by the string @var{specifier}.
 | 
			
		||||
If @var{specifier} is set to @code{auto}, the reference is choosen
 | 
			
		||||
automatically. Otherwise it must be a stream specifier (see the ``Stream
 | 
			
		||||
specifiers'' chapter in the ffmpeg manual) which specifies the
 | 
			
		||||
reference stream. The default value is ``auto''.
 | 
			
		||||
 | 
			
		||||
@item segment_format @var{format}
 | 
			
		||||
Override the inner container format, by default it is guessed by the filename
 | 
			
		||||
extension.
 | 
			
		||||
@item segment_list @var{name}
 | 
			
		||||
Generate also a listfile named @var{name}. If not specified no
 | 
			
		||||
listfile is generated.
 | 
			
		||||
@item segment_list_flags @var{flags}
 | 
			
		||||
Set flags affecting the segment list generation.
 | 
			
		||||
 | 
			
		||||
It currently supports the following flags:
 | 
			
		||||
@table @var
 | 
			
		||||
@item cache
 | 
			
		||||
Allow caching (only affects M3U8 list files).
 | 
			
		||||
 | 
			
		||||
@item live
 | 
			
		||||
Allow live-friendly file generation.
 | 
			
		||||
 | 
			
		||||
This currently only affects M3U8 lists. In particular, write a fake
 | 
			
		||||
EXT-X-TARGETDURATION duration field at the top of the file, based on
 | 
			
		||||
the specified @var{segment_time}.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
Default value is @code{cache}.
 | 
			
		||||
 | 
			
		||||
@item segment_list_size @var{size}
 | 
			
		||||
Overwrite the listfile once it reaches @var{size} entries. If 0
 | 
			
		||||
the listfile is never overwritten. Default value is 0.
 | 
			
		||||
@item segment_list type @var{type}
 | 
			
		||||
Specify the format for the segment list file.
 | 
			
		||||
 | 
			
		||||
The following values are recognized:
 | 
			
		||||
@table @option
 | 
			
		||||
@item flat
 | 
			
		||||
Generate a flat list for the created segments, one segment per line.
 | 
			
		||||
 | 
			
		||||
@item csv, ext
 | 
			
		||||
Generate a list for the created segments, one segment per line,
 | 
			
		||||
each line matching the format (comma-separated values):
 | 
			
		||||
@example
 | 
			
		||||
@var{segment_filename},@var{segment_start_time},@var{segment_end_time}
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@var{segment_filename} is the name of the output file generated by the
 | 
			
		||||
muxer according to the provided pattern. CSV escaping (according to
 | 
			
		||||
RFC4180) is applied if required.
 | 
			
		||||
 | 
			
		||||
@var{segment_start_time} and @var{segment_end_time} specify
 | 
			
		||||
the segment start and end time expressed in seconds.
 | 
			
		||||
 | 
			
		||||
A list file with the suffix @code{".csv"} or @code{".ext"} will
 | 
			
		||||
auto-select this format.
 | 
			
		||||
 | 
			
		||||
@code{ext} is deprecated in favor or @code{csv}.
 | 
			
		||||
 | 
			
		||||
@item m3u8
 | 
			
		||||
Generate an extended M3U8 file, version 4, compliant with
 | 
			
		||||
@url{http://tools.ietf.org/id/draft-pantos-http-live-streaming-08.txt}.
 | 
			
		||||
 | 
			
		||||
A list file with the suffix @code{".m3u8"} will auto-select this format.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
If not specified the type is guessed from the list file name suffix.
 | 
			
		||||
@item segment_time @var{time}
 | 
			
		||||
Set segment duration to @var{time}. Default value is "2".
 | 
			
		||||
@item segment_time_delta @var{delta}
 | 
			
		||||
Specify the accuracy time when selecting the start time for a
 | 
			
		||||
segment. Default value is "0".
 | 
			
		||||
 | 
			
		||||
When delta is specified a key-frame will start a new segment if its
 | 
			
		||||
PTS satisfies the relation:
 | 
			
		||||
@example
 | 
			
		||||
PTS >= start_time - time_delta
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
This option is useful when splitting video content, which is always
 | 
			
		||||
split at GOP boundaries, in case a key frame is found just before the
 | 
			
		||||
specified split time.
 | 
			
		||||
 | 
			
		||||
In particular may be used in combination with the @file{ffmpeg} option
 | 
			
		||||
@var{force_key_frames}. The key frame times specified by
 | 
			
		||||
@var{force_key_frames} may not be set accurately because of rounding
 | 
			
		||||
issues, with the consequence that a key frame time may result set just
 | 
			
		||||
before the specified time. For constant frame rate videos a value of
 | 
			
		||||
1/2*@var{frame_rate} should address the worst case mismatch between
 | 
			
		||||
the specified time and the time set by @var{force_key_frames}.
 | 
			
		||||
 | 
			
		||||
@item segment_times @var{times}
 | 
			
		||||
Specify a list of split points. @var{times} contains a list of comma
 | 
			
		||||
separated duration specifications, in increasing order.
 | 
			
		||||
 | 
			
		||||
@item segment_frames @var{frames}
 | 
			
		||||
Specify a list of split video frame numbers. @var{frames} contains a
 | 
			
		||||
list of comma separated integer numbers, in increasing order.
 | 
			
		||||
 | 
			
		||||
This option specifies to start a new segment whenever a reference
 | 
			
		||||
stream key frame is found and the sequential number (starting from 0)
 | 
			
		||||
of the frame is greater or equal to the next value in the list.
 | 
			
		||||
 | 
			
		||||
@item segment_wrap @var{limit}
 | 
			
		||||
Wrap around segment index once it reaches @var{limit}.
 | 
			
		||||
 | 
			
		||||
@item segment_start_number @var{number}
 | 
			
		||||
Set the sequence number of the first segment. Defaults to @code{0}.
 | 
			
		||||
 | 
			
		||||
@item reset_timestamps @var{1|0}
 | 
			
		||||
Reset timestamps at the begin of each segment, so that each segment
 | 
			
		||||
will start with near-zero timestamps. It is meant to ease the playback
 | 
			
		||||
of the generated segments. May not work with some combinations of
 | 
			
		||||
muxers/codecs. It is set to @code{0} by default.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@section Examples
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
@item
 | 
			
		||||
To remux the content of file @file{in.mkv} to a list of segments
 | 
			
		||||
@file{out-000.nut}, @file{out-001.nut}, etc., and write the list of
 | 
			
		||||
generated segments to @file{out.list}:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i in.mkv -codec copy -map 0 -f segment -segment_list out.list out%03d.nut
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
As the example above, but segment the input file according to the split
 | 
			
		||||
points specified by the @var{segment_times} option:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i in.mkv -codec copy -map 0 -f segment -segment_list out.csv -segment_times 1,2,3,5,8,13,21 out%03d.nut
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
As the example above, but use the @code{ffmpeg} @var{force_key_frames}
 | 
			
		||||
option to force key frames in the input at the specified location, together
 | 
			
		||||
with the segment option @var{segment_time_delta} to account for
 | 
			
		||||
possible roundings operated when setting key frame times.
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i in.mkv -force_key_frames 1,2,3,5,8,13,21 -codec:v mpeg4 -codec:a pcm_s16le -map 0 \
 | 
			
		||||
-f segment -segment_list out.csv -segment_times 1,2,3,5,8,13,21 -segment_time_delta 0.05 out%03d.nut
 | 
			
		||||
@end example
 | 
			
		||||
In order to force key frames on the input file, transcoding is
 | 
			
		||||
required.
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Segment the input file by splitting the input file according to the
 | 
			
		||||
frame numbers sequence specified with the @var{segment_frames} option:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i in.mkv -codec copy -map 0 -f segment -segment_list out.csv -segment_frames 100,200,300,500,800 out%03d.nut
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
To convert the @file{in.mkv} to TS segments using the @code{libx264}
 | 
			
		||||
and @code{libfaac} encoders:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i in.mkv -map 0 -codec:v libx264 -codec:a libfaac -f ssegment -segment_list out.list out%03d.ts
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Segment the input file, and create an M3U8 live playlist (can be used
 | 
			
		||||
as live HLS source):
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -re -i in.mkv -codec copy -map 0 -f segment -segment_list playlist.m3u8 \
 | 
			
		||||
-segment_list_flags +live -segment_time 10 out%03d.mkv
 | 
			
		||||
@end example
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@section mp3
 | 
			
		||||
 | 
			
		||||
The MP3 muxer writes a raw MP3 stream with an ID3v2 header at the beginning and
 | 
			
		||||
optionally an ID3v1 tag at the end. ID3v2.3 and ID3v2.4 are supported, the
 | 
			
		||||
@code{id3v2_version} option controls which one is used. The legacy ID3v1 tag is
 | 
			
		||||
not written by default, but may be enabled with the @code{write_id3v1} option.
 | 
			
		||||
 | 
			
		||||
For seekable output the muxer also writes a Xing frame at the beginning, which
 | 
			
		||||
contains the number of frames in the file. It is useful for computing duration
 | 
			
		||||
of VBR files.
 | 
			
		||||
 | 
			
		||||
The muxer supports writing ID3v2 attached pictures (APIC frames). The pictures
 | 
			
		||||
are supplied to the muxer in form of a video stream with a single packet. There
 | 
			
		||||
can be any number of those streams, each will correspond to a single APIC frame.
 | 
			
		||||
The stream metadata tags @var{title} and @var{comment} map to APIC
 | 
			
		||||
@var{description} and @var{picture type} respectively. See
 | 
			
		||||
@url{http://id3.org/id3v2.4.0-frames} for allowed picture types.
 | 
			
		||||
 | 
			
		||||
Note that the APIC frames must be written at the beginning, so the muxer will
 | 
			
		||||
buffer the audio frames until it gets all the pictures. It is therefore advised
 | 
			
		||||
to provide the pictures as soon as possible to avoid excessive buffering.
 | 
			
		||||
 | 
			
		||||
Examples:
 | 
			
		||||
 | 
			
		||||
Write an mp3 with an ID3v2.3 header and an ID3v1 footer:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -id3v2_version 3 -write_id3v1 1 out.mp3
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
To attach a picture to an mp3 file select both the audio and the picture stream
 | 
			
		||||
with @code{map}:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i input.mp3 -i cover.png -c copy -map 0 -map 1
 | 
			
		||||
-metadata:s:v title="Album cover" -metadata:s:v comment="Cover (Front)" out.mp3
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@c man end MUXERS
 | 
			
		||||
							
								
								
									
										138
									
								
								doc/nut.texi
									
									
									
									
									
								
							
							
						
						
									
										138
									
								
								doc/nut.texi
									
									
									
									
									
								
							@@ -1,138 +0,0 @@
 | 
			
		||||
\input texinfo @c -*- texinfo -*-
 | 
			
		||||
 | 
			
		||||
@settitle NUT
 | 
			
		||||
 | 
			
		||||
@titlepage
 | 
			
		||||
@center @titlefont{NUT}
 | 
			
		||||
@end titlepage
 | 
			
		||||
 | 
			
		||||
@top
 | 
			
		||||
 | 
			
		||||
@contents
 | 
			
		||||
 | 
			
		||||
@chapter Description
 | 
			
		||||
NUT is a low overhead generic container format. It stores audio, video,
 | 
			
		||||
subtitle and user-defined streams in a simple, yet efficient, way.
 | 
			
		||||
 | 
			
		||||
It was created by a group of FFmpeg and MPlayer developers in 2003
 | 
			
		||||
and was finalized in 2008.
 | 
			
		||||
 | 
			
		||||
The official nut specification is at svn://svn.mplayerhq.hu/nut
 | 
			
		||||
In case of any differences between this text and the official specification,
 | 
			
		||||
the official specification shall prevail.
 | 
			
		||||
 | 
			
		||||
@chapter Container-specific codec tags
 | 
			
		||||
 | 
			
		||||
@section Generic raw YUVA formats
 | 
			
		||||
 | 
			
		||||
Since many exotic planar YUVA pixel formats are not considered by
 | 
			
		||||
the AVI/QuickTime FourCC lists, the following scheme is adopted for
 | 
			
		||||
representing them.
 | 
			
		||||
 | 
			
		||||
The first two bytes can contain the values:
 | 
			
		||||
Y1 = only Y
 | 
			
		||||
Y2 = Y+A
 | 
			
		||||
Y3 = YUV
 | 
			
		||||
Y4 = YUVA
 | 
			
		||||
 | 
			
		||||
The third byte represents the width and height chroma subsampling
 | 
			
		||||
values for the UV planes, that is the amount to shift the luma
 | 
			
		||||
width/height right to find the chroma width/height.
 | 
			
		||||
 | 
			
		||||
The fourth byte is the number of bits used (8, 16, ...).
 | 
			
		||||
 | 
			
		||||
If the order of bytes is inverted, that means that each component has
 | 
			
		||||
to be read big-endian.
 | 
			
		||||
 | 
			
		||||
@section Raw Audio
 | 
			
		||||
 | 
			
		||||
@multitable @columnfractions .4 .4
 | 
			
		||||
@item ALAW  @tab A-LAW
 | 
			
		||||
@item ULAW  @tab MU-LAW
 | 
			
		||||
@item P<type><interleaving><bits> @tab little-endian PCM
 | 
			
		||||
@item <bits><interleaving><type>P @tab big-endian PCM
 | 
			
		||||
@end multitable
 | 
			
		||||
 | 
			
		||||
<type> is S for signed integer, U for unsigned integer, F for IEEE float
 | 
			
		||||
<interleaving> is D for default, P is for planar.
 | 
			
		||||
<bits> is 8/16/24/32
 | 
			
		||||
 | 
			
		||||
@example
 | 
			
		||||
PFD[32]   would for example be signed 32 bit little-endian IEEE float
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section Subtitles
 | 
			
		||||
 | 
			
		||||
@multitable @columnfractions .4 .4
 | 
			
		||||
@item UTF8   @tab Raw UTF-8
 | 
			
		||||
@item SSA[0] @tab SubStation Alpha
 | 
			
		||||
@item DVDS   @tab DVD subtitles
 | 
			
		||||
@item DVBS   @tab DVB subtitles
 | 
			
		||||
@end multitable
 | 
			
		||||
 | 
			
		||||
@section Raw Data
 | 
			
		||||
 | 
			
		||||
@multitable @columnfractions .4 .4
 | 
			
		||||
@item UTF8   @tab Raw UTF-8
 | 
			
		||||
@end multitable
 | 
			
		||||
 | 
			
		||||
@section Codecs
 | 
			
		||||
 | 
			
		||||
@multitable @columnfractions .4 .4
 | 
			
		||||
@item 3IV1 @tab non-compliant MPEG-4 generated by old 3ivx
 | 
			
		||||
@item ASV1 @tab Asus Video
 | 
			
		||||
@item ASV2 @tab Asus Video 2
 | 
			
		||||
@item CVID @tab Cinepak
 | 
			
		||||
@item CYUV @tab Creative YUV
 | 
			
		||||
@item DIVX @tab non-compliant MPEG-4 generated by old DivX
 | 
			
		||||
@item DUCK @tab Truemotion 1
 | 
			
		||||
@item FFV1 @tab FFmpeg video 1
 | 
			
		||||
@item FFVH @tab FFmpeg Huffyuv
 | 
			
		||||
@item H261 @tab ITU H.261
 | 
			
		||||
@item H262 @tab ITU H.262
 | 
			
		||||
@item H263 @tab ITU H.263
 | 
			
		||||
@item H264 @tab ITU H.264
 | 
			
		||||
@item HFYU @tab Huffyuv
 | 
			
		||||
@item I263 @tab Intel H.263
 | 
			
		||||
@item IV31 @tab Indeo 3.1
 | 
			
		||||
@item IV32 @tab Indeo 3.2
 | 
			
		||||
@item IV50 @tab Indeo 5.0
 | 
			
		||||
@item LJPG @tab ITU JPEG (lossless)
 | 
			
		||||
@item MJLS @tab ITU JPEG-LS
 | 
			
		||||
@item MJPG @tab ITU JPEG
 | 
			
		||||
@item MPG4 @tab MS MPEG-4v1 (not ISO MPEG-4)
 | 
			
		||||
@item MP42 @tab MS MPEG-4v2
 | 
			
		||||
@item MP43 @tab MS MPEG-4v3
 | 
			
		||||
@item MP4V @tab ISO MPEG-4 Part 2 Video (from old encoders)
 | 
			
		||||
@item mpg1 @tab ISO MPEG-1 Video
 | 
			
		||||
@item mpg2 @tab ISO MPEG-2 Video
 | 
			
		||||
@item MRLE @tab MS RLE
 | 
			
		||||
@item MSVC @tab MS Video 1
 | 
			
		||||
@item RT21 @tab Indeo 2.1
 | 
			
		||||
@item RV10 @tab RealVideo 1.0
 | 
			
		||||
@item RV20 @tab RealVideo 2.0
 | 
			
		||||
@item RV30 @tab RealVideo 3.0
 | 
			
		||||
@item RV40 @tab RealVideo 4.0
 | 
			
		||||
@item SNOW @tab FFmpeg Snow
 | 
			
		||||
@item SVQ1 @tab Sorenson Video 1
 | 
			
		||||
@item SVQ3 @tab Sorenson Video 3
 | 
			
		||||
@item theo @tab Xiph Theora
 | 
			
		||||
@item TM20 @tab Truemotion 2.0
 | 
			
		||||
@item UMP4 @tab non-compliant MPEG-4 generated by UB Video MPEG-4
 | 
			
		||||
@item VCR1 @tab ATI VCR1
 | 
			
		||||
@item VP30 @tab VP 3.0
 | 
			
		||||
@item VP31 @tab VP 3.1
 | 
			
		||||
@item VP50 @tab VP 5.0
 | 
			
		||||
@item VP60 @tab VP 6.0
 | 
			
		||||
@item VP61 @tab VP 6.1
 | 
			
		||||
@item VP62 @tab VP 6.2
 | 
			
		||||
@item VP70 @tab VP 7.0
 | 
			
		||||
@item WMV1 @tab MS WMV7
 | 
			
		||||
@item WMV2 @tab MS WMV8
 | 
			
		||||
@item WMV3 @tab MS WMV9
 | 
			
		||||
@item WV1F @tab non-compliant MPEG-4 generated by ?
 | 
			
		||||
@item WVC1 @tab VC-1
 | 
			
		||||
@item XVID @tab non-compliant MPEG-4 generated by old Xvid
 | 
			
		||||
@item XVIX @tab non-compliant MPEG-4 generated by old Xvid with interlacing bug
 | 
			
		||||
@end multitable
 | 
			
		||||
 | 
			
		||||
@@ -17,15 +17,15 @@ Understanding these overoptimized functions:
 | 
			
		||||
As many functions tend to be a bit difficult to understand because
 | 
			
		||||
of optimizations, it can be hard to optimize them further, or write
 | 
			
		||||
architecture-specific versions. It is recommended to look at older
 | 
			
		||||
revisions of the interesting files (web frontends for the various FFmpeg
 | 
			
		||||
branches are listed at http://ffmpeg.org/download.html).
 | 
			
		||||
revisions of the interesting files (for a web frontend try ViewVC at
 | 
			
		||||
http://svn.ffmpeg.org/ffmpeg/trunk/).
 | 
			
		||||
Alternatively, look into the other architecture-specific versions in
 | 
			
		||||
the x86/, ppc/, alpha/ subdirectories. Even if you don't exactly
 | 
			
		||||
comprehend the instructions, it could help understanding the functions
 | 
			
		||||
and how they can be optimized.
 | 
			
		||||
 | 
			
		||||
NOTE: If you still don't understand some function, ask at our mailing list!!!
 | 
			
		||||
(http://lists.ffmpeg.org/mailman/listinfo/ffmpeg-devel)
 | 
			
		||||
(http://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-devel)
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
When is an optimization justified?
 | 
			
		||||
@@ -157,68 +157,15 @@ Use asm loops like:
 | 
			
		||||
__asm__(
 | 
			
		||||
    "1: ....
 | 
			
		||||
    ...
 | 
			
		||||
    "jump_instruction ....
 | 
			
		||||
    "jump_instruciton ....
 | 
			
		||||
Do not use C loops:
 | 
			
		||||
do{
 | 
			
		||||
    __asm__(
 | 
			
		||||
        ...
 | 
			
		||||
}while()
 | 
			
		||||
 | 
			
		||||
For x86, mark registers that are clobbered in your asm. This means both
 | 
			
		||||
general x86 registers (e.g. eax) as well as XMM registers. This last one is
 | 
			
		||||
particularly important on Win64, where xmm6-15 are callee-save, and not
 | 
			
		||||
restoring their contents leads to undefined results. In external asm (e.g.
 | 
			
		||||
yasm), you do this by using:
 | 
			
		||||
cglobal functon_name, num_args, num_regs, num_xmm_regs
 | 
			
		||||
In inline asm, you specify clobbered registers at the end of your asm:
 | 
			
		||||
__asm__(".." ::: "%eax").
 | 
			
		||||
If gcc is not set to support sse (-msse) it will not accept xmm registers
 | 
			
		||||
in the clobber list. For that we use two macros to declare the clobbers.
 | 
			
		||||
XMM_CLOBBERS should be used when there are other clobbers, for example:
 | 
			
		||||
__asm__(".." ::: XMM_CLOBBERS("xmm0",) "eax");
 | 
			
		||||
and XMM_CLOBBERS_ONLY should be used when the only clobbers are xmm registers:
 | 
			
		||||
__asm__(".." :: XMM_CLOBBERS_ONLY("xmm0"));
 | 
			
		||||
 | 
			
		||||
Do not expect a compiler to maintain values in your registers between separate
 | 
			
		||||
(inline) asm code blocks. It is not required to. For example, this is bad:
 | 
			
		||||
__asm__("movdqa %0, %%xmm7" : src);
 | 
			
		||||
/* do something */
 | 
			
		||||
__asm__("movdqa %%xmm7, %1" : dst);
 | 
			
		||||
- first of all, you're assuming that the compiler will not use xmm7 in
 | 
			
		||||
   between the two asm blocks.  It probably won't when you test it, but it's
 | 
			
		||||
   a poor assumption that will break at some point for some --cpu compiler flag
 | 
			
		||||
- secondly, you didn't mark xmm7 as clobbered. If you did, the compiler would
 | 
			
		||||
   have restored the original value of xmm7 after the first asm block, thus
 | 
			
		||||
   rendering the combination of the two blocks of code invalid
 | 
			
		||||
Code that depends on data in registries being untouched, should be written as
 | 
			
		||||
a single __asm__() statement. Ideally, a single function contains only one
 | 
			
		||||
__asm__() block.
 | 
			
		||||
 | 
			
		||||
Use external asm (nasm/yasm) or inline asm (__asm__()), do not use intrinsics.
 | 
			
		||||
The latter requires a good optimizing compiler which gcc is not.
 | 
			
		||||
 | 
			
		||||
Inline asm vs. external asm
 | 
			
		||||
---------------------------
 | 
			
		||||
Both inline asm (__asm__("..") in a .c file, handled by a compiler such as gcc)
 | 
			
		||||
and external asm (.s or .asm files, handled by an assembler such as yasm/nasm)
 | 
			
		||||
are accepted in FFmpeg. Which one to use differs per specific case.
 | 
			
		||||
 | 
			
		||||
- if your code is intended to be inlined in a C function, inline asm is always
 | 
			
		||||
   better, because external asm cannot be inlined
 | 
			
		||||
- if your code calls external functions, yasm is always better
 | 
			
		||||
- if your code takes huge and complex structs as function arguments (e.g.
 | 
			
		||||
   MpegEncContext; note that this is not ideal and is discouraged if there
 | 
			
		||||
   are alternatives), then inline asm is always better, because predicting
 | 
			
		||||
   member offsets in complex structs is almost impossible. It's safest to let
 | 
			
		||||
   the compiler take care of that
 | 
			
		||||
- in many cases, both can be used and it just depends on the preference of the
 | 
			
		||||
   person writing the asm. For new asm, the choice is up to you. For existing
 | 
			
		||||
   asm, you'll likely want to maintain whatever form it is currently in unless
 | 
			
		||||
   there is a good reason to change it.
 | 
			
		||||
- if, for some reason, you believe that a particular chunk of existing external
 | 
			
		||||
   asm could be improved upon further if written in inline asm (or the other
 | 
			
		||||
   way around), then please make the move from external asm <-> inline asm a
 | 
			
		||||
   separate patch before your patches that actually improve the asm.
 | 
			
		||||
Use __asm__() instead of intrinsics. The latter requires a good optimizing compiler
 | 
			
		||||
which gcc is not.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
Links:
 | 
			
		||||
@@ -253,7 +200,7 @@ Optimization guide for ARM11 (used in Nokia N800 Internet Tablet):
 | 
			
		||||
http://infocenter.arm.com/help/topic/com.arm.doc.ddi0211j/DDI0211J_arm1136_r1p5_trm.pdf
 | 
			
		||||
Optimization guide for Intel XScale (used in Sharp Zaurus PDA):
 | 
			
		||||
http://download.intel.com/design/intelxscale/27347302.pdf
 | 
			
		||||
Intel Wireless MMX 2 Coprocessor: Programmers Reference Manual
 | 
			
		||||
Intel Wireless MMX2 Coprocessor: Programmers Reference Manual
 | 
			
		||||
http://download.intel.com/design/intelxscale/31451001.pdf
 | 
			
		||||
 | 
			
		||||
PowerPC-specific:
 | 
			
		||||
 
 | 
			
		||||
							
								
								
									
										156
									
								
								doc/outdevs.texi
									
									
									
									
									
								
							
							
						
						
									
										156
									
								
								doc/outdevs.texi
									
									
									
									
									
								
							@@ -1,156 +0,0 @@
 | 
			
		||||
@chapter Output Devices
 | 
			
		||||
@c man begin OUTPUT DEVICES
 | 
			
		||||
 | 
			
		||||
Output devices are configured elements in FFmpeg which allow to write
 | 
			
		||||
multimedia data to an output device attached to your system.
 | 
			
		||||
 | 
			
		||||
When you configure your FFmpeg build, all the supported output devices
 | 
			
		||||
are enabled by default. You can list all available ones using the
 | 
			
		||||
configure option "--list-outdevs".
 | 
			
		||||
 | 
			
		||||
You can disable all the output devices using the configure option
 | 
			
		||||
"--disable-outdevs", and selectively enable an output device using the
 | 
			
		||||
option "--enable-outdev=@var{OUTDEV}", or you can disable a particular
 | 
			
		||||
input device using the option "--disable-outdev=@var{OUTDEV}".
 | 
			
		||||
 | 
			
		||||
The option "-formats" of the ff* tools will display the list of
 | 
			
		||||
enabled output devices (amongst the muxers).
 | 
			
		||||
 | 
			
		||||
A description of the currently available output devices follows.
 | 
			
		||||
 | 
			
		||||
@section alsa
 | 
			
		||||
 | 
			
		||||
ALSA (Advanced Linux Sound Architecture) output device.
 | 
			
		||||
 | 
			
		||||
@section caca
 | 
			
		||||
 | 
			
		||||
CACA output device.
 | 
			
		||||
 | 
			
		||||
This output devices allows to show a video stream in CACA window.
 | 
			
		||||
Only one CACA window is allowed per application, so you can
 | 
			
		||||
have only one instance of this output device in an application.
 | 
			
		||||
 | 
			
		||||
To enable this output device you need to configure FFmpeg with
 | 
			
		||||
@code{--enable-libcaca}.
 | 
			
		||||
libcaca is a graphics library that outputs text instead of pixels.
 | 
			
		||||
 | 
			
		||||
For more information about libcaca, check:
 | 
			
		||||
@url{http://caca.zoy.org/wiki/libcaca}
 | 
			
		||||
 | 
			
		||||
@subsection Options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item window_title
 | 
			
		||||
Set the CACA window title, if not specified default to the filename
 | 
			
		||||
specified for the output device.
 | 
			
		||||
 | 
			
		||||
@item window_size
 | 
			
		||||
Set the CACA window size, can be a string of the form
 | 
			
		||||
@var{width}x@var{height} or a video size abbreviation.
 | 
			
		||||
If not specified it defaults to the size of the input video.
 | 
			
		||||
 | 
			
		||||
@item driver
 | 
			
		||||
Set display driver.
 | 
			
		||||
 | 
			
		||||
@item algorithm
 | 
			
		||||
Set dithering algorithm. Dithering is necessary
 | 
			
		||||
because the picture being rendered has usually far more colours than
 | 
			
		||||
the available palette.
 | 
			
		||||
The accepted values are listed with @code{-list_dither algorithms}.
 | 
			
		||||
 | 
			
		||||
@item antialias
 | 
			
		||||
Set antialias method. Antialiasing smoothens the rendered
 | 
			
		||||
image and avoids the commonly seen staircase effect.
 | 
			
		||||
The accepted values are listed with @code{-list_dither antialiases}.
 | 
			
		||||
 | 
			
		||||
@item charset
 | 
			
		||||
Set which characters are going to be used when rendering text.
 | 
			
		||||
The accepted values are listed with @code{-list_dither charsets}.
 | 
			
		||||
 | 
			
		||||
@item color
 | 
			
		||||
Set color to be used when rendering text.
 | 
			
		||||
The accepted values are listed with @code{-list_dither colors}.
 | 
			
		||||
 | 
			
		||||
@item list_drivers
 | 
			
		||||
If set to @option{true}, print a list of available drivers and exit.
 | 
			
		||||
 | 
			
		||||
@item list_dither
 | 
			
		||||
List available dither options related to the argument.
 | 
			
		||||
The argument must be one of @code{algorithms}, @code{antialiases},
 | 
			
		||||
@code{charsets}, @code{colors}.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@subsection Examples
 | 
			
		||||
 | 
			
		||||
@itemize
 | 
			
		||||
@item
 | 
			
		||||
The following command shows the @command{ffmpeg} output is an
 | 
			
		||||
CACA window, forcing its size to 80x25:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -vcodec rawvideo -pix_fmt rgb24 -window_size 80x25 -f caca -
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Show the list of available drivers and exit:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -pix_fmt rgb24 -f caca -list_drivers true -
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@item
 | 
			
		||||
Show the list of available dither colors and exit:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -pix_fmt rgb24 -f caca -list_dither colors -
 | 
			
		||||
@end example
 | 
			
		||||
@end itemize
 | 
			
		||||
 | 
			
		||||
@section oss
 | 
			
		||||
 | 
			
		||||
OSS (Open Sound System) output device.
 | 
			
		||||
 | 
			
		||||
@section sdl
 | 
			
		||||
 | 
			
		||||
SDL (Simple DirectMedia Layer) output device.
 | 
			
		||||
 | 
			
		||||
This output devices allows to show a video stream in an SDL
 | 
			
		||||
window. Only one SDL window is allowed per application, so you can
 | 
			
		||||
have only one instance of this output device in an application.
 | 
			
		||||
 | 
			
		||||
To enable this output device you need libsdl installed on your system
 | 
			
		||||
when configuring your build.
 | 
			
		||||
 | 
			
		||||
For more information about SDL, check:
 | 
			
		||||
@url{http://www.libsdl.org/}
 | 
			
		||||
 | 
			
		||||
@subsection Options
 | 
			
		||||
 | 
			
		||||
@table @option
 | 
			
		||||
 | 
			
		||||
@item window_title
 | 
			
		||||
Set the SDL window title, if not specified default to the filename
 | 
			
		||||
specified for the output device.
 | 
			
		||||
 | 
			
		||||
@item icon_title
 | 
			
		||||
Set the name of the iconified SDL window, if not specified it is set
 | 
			
		||||
to the same value of @var{window_title}.
 | 
			
		||||
 | 
			
		||||
@item window_size
 | 
			
		||||
Set the SDL window size, can be a string of the form
 | 
			
		||||
@var{width}x@var{height} or a video size abbreviation.
 | 
			
		||||
If not specified it defaults to the size of the input video,
 | 
			
		||||
downscaled according to the aspect ratio.
 | 
			
		||||
@end table
 | 
			
		||||
 | 
			
		||||
@subsection Examples
 | 
			
		||||
 | 
			
		||||
The following command shows the @command{ffmpeg} output is an
 | 
			
		||||
SDL window, forcing its size to the qcif format:
 | 
			
		||||
@example
 | 
			
		||||
ffmpeg -i INPUT -vcodec rawvideo -pix_fmt yuv420p -window_size qcif -f sdl "SDL output"
 | 
			
		||||
@end example
 | 
			
		||||
 | 
			
		||||
@section sndio
 | 
			
		||||
 | 
			
		||||
sndio audio output device.
 | 
			
		||||
 | 
			
		||||
@c man end OUTPUT DEVICES
 | 
			
		||||
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	Block a user