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Rostislav Pehlivanov 4565611b04 aacenc_is: add a flag to use pure coefficients instead 
This commit adds a flag to use the pure coefficients instead
of the processed ones (sce->coeffs). This is needed because
IS will apply the changes to the coefficients immediately
before the adjust_common_prediction function and it doesn't
make sense to measure stereo channel coefficient difference
when one of the channels coefficients are all zero.

Therefore add a flag to use pure coefficients in that case.
TNS is the only thing touching the coefficients before IS
so common window prediction will not take that into account
but the effect of the TNS filter per coefficient can be small
(a few percent) so to some approximation it's fine to just
ignore that.

Also fixed a small error which doesn't alter the results
that much. pow(sqrt(number), 3.0/4.0) == pow(number, 3.0/8.0) !=
pow(number, 3.0/4.0).

Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
2015-09-05 08:32:09 +01:00
compat use a wrapper script to call MS link.exe to avoid mixing with /usr/bin/link.exe 2015-07-24 20:02:32 +02:00
doc avfilter/vf_waveform: change intensity to float 2015-09-04 17:14:32 +00:00
libavcodec aacenc_is: add a flag to use pure coefficients instead 2015-09-05 08:32:09 +01:00
libavdevice avdevice/libdc1394: Make dc1394_frame_format and dc1394_frame_rate, static 2015-08-30 13:10:11 +02:00
libavfilter avfilter/vf_vectorscope: change intensity to float 2015-09-04 18:47:46 +00:00
libavformat lavf/mxfdec: Support more codecs in mxf_picture_essence_container_uls[]. 2015-09-05 00:11:14 +02:00
libavresample x86inc: Drop SECTION_TEXT macro 2015-08-04 20:13:09 +02:00
libavutil avutil/common: Add FFNABS() 2015-09-03 09:05:50 +02:00
libpostproc avutil/x86/asm: rename REG_SP to REG_sp 2015-08-22 02:56:53 +02:00
libswresample swresample/swresample: Fix integer overflow in seed calculation 2015-09-03 09:32:43 +02:00
libswscale swscale: re-enable gamma 2015-09-04 19:00:20 -03:00
presets presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests vp9_parse: fix parsing of pskip and profile 2/3. 2015-09-04 09:59:17 -04:00
tools graph2dot: use avfilter_pad_get_name accessor function 2015-08-20 22:38:01 +02:00
.gitattributes Treat all '*.pnm' files as non-text file 2014-11-28 17:52:43 -05:00
.gitignore doc/examples: rename avio_list_dir -> avio_dir_cmd 2015-08-16 02:16:47 +02:00
arch.mak use mmi instead of loongson3 as simd-optimization flag 2015-07-07 03:46:57 +02:00
Changelog lavc/j2kenc: Remove experimental flag. 2015-09-04 23:48:32 +02:00
cmdutils_common_opts.h opts: add list device sources/sinks options 2014-10-25 20:20:31 +02:00
cmdutils_opencl.c OpenCL: Avoid potential buffer overflow in cmdutils_opencl.c 2015-04-28 12:18:23 +02:00
cmdutils.c ffmpeg: replace deprecated av_log_ask_for_sample with av_log 2015-08-12 00:14:13 +02:00
cmdutils.h cmdutils: remove sws_opts usage, simplify code 2015-08-08 16:51:25 +02:00
common.mak Merge commit '3ae0e721c7b6e0483801b9039b3d140e3b68b7f5' 2015-07-22 16:30:37 +02:00
configure configure: Do not let the webm muxer suggest external libraries. 2015-08-28 06:03:58 +02:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS CREDITS: redirect to Git log, remove current outdated content 2013-01-31 18:02:52 +01:00
ffmpeg_dxva2.c ffmpeg_dxva2: call GetDesktopWindow() in place of GetShellWindow() 2015-06-03 16:25:08 +02:00
ffmpeg_filter.c lavfi: fix compilation with FF_API_OLD_FILTER_OPTS=0. 2015-08-18 22:22:49 -04:00
ffmpeg_opt.c ffmpeg: Improve help text for -target. 2015-09-02 14:32:06 +02:00
ffmpeg_vdpau.c ffmpeg_vdpau: Ignore decoder's max supported level 2015-08-16 15:02:33 -07:00
ffmpeg_videotoolbox.c avcodec: add new Videotoolbox hwaccel. 2015-08-03 10:12:10 +02:00
ffmpeg.c ffmpeg: Drop redundant ist check 2015-09-04 11:42:23 +02:00
ffmpeg.h ffmpeg: switch swscale option handling to AVDictionary similar to what the other subsystems use 2015-08-08 14:44:15 +02:00
ffplay.c Put remaining pieces of CODEC_FLAG_EMU_EDGE under FF_API_EMU_EDGE. 2015-08-28 14:40:59 -04:00
ffprobe.c ffprobe: check av_asprintf() for failure 2015-06-13 01:45:27 +02:00
ffserver_config.c ffserver: use -b instead of -ab for setting audio bitrate. 2015-08-28 14:59:58 -04:00
ffserver_config.h ffserver: Use singlejpeg muxer for jpeg 2015-06-08 03:36:22 +02:00
ffserver.c ffserver: cast PID to int64_t before printing 2015-08-21 15:47:54 +02:00
INSTALL.md INSTALL: add markdown syntax 2014-05-28 22:38:38 +02:00
library.mak build: add LDLIBFLAGS 2015-07-08 14:35:02 +02:00
LICENSE.md avfilter/vf_removegrain: add x86 and x86_64 SSE2 functions 2015-07-14 23:50:50 +00:00
MAINTAINERS MAINTAINERS: add myself as an AAC encoder maintainer 2015-08-21 19:44:15 +01:00
Makefile avcodec: add new Videotoolbox hwaccel. 2015-08-03 10:12:10 +02:00
README.md README: add ffserver 2015-02-12 11:59:22 +01:00
RELEASE RELEASE: update to 2.7.git 2015-07-19 17:52:31 -03:00
version.sh version.sh: Print versions based on the last git tag for release branches 2014-07-28 15:44:59 +02:00

README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides a mean to alter decoded Audio and Video through chain of filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.

Tools

  • ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
  • ffplay is a minimalistic multimedia player.
  • ffprobe is a simple analysis tool to inspect multimedia content.
  • ffserver is a multimedia streaming server for live broadcasts.
  • Additional small tools such as aviocat, ismindex and qt-faststart.

Documentation

The offline documentation is available in the doc/ directory.

The online documentation is available in the main website and in the wiki.

Examples

Coding examples are available in the doc/examples directory.

License

FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.