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Rostislav Pehlivanov f7f71b5795 aacenc: Add support for Perceptual Noise Substitution energy values 
This commit implements support for writing the noise energy values used in PNS.
The difference between regular scalefactors and noise energy values is that the latter
require a small preamble (NOISE_PRE + energy_value_diff) to be written as the first
noise-containing band. Any following noise energy values use the previous one to
base their "diff" on. Ordinary scalefactors remain unchanged other than that they ignore the noise values.

This commit should not change anything by itself, the following commits will bring it in use.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-04-13 04:14:27 +02:00
compat avisynth: drop support of AviSynth 2.5 2015-03-25 20:37:26 +01:00
doc libavformat/http.c: Make http-listen work as an input stream. 2015-04-11 23:10:44 +02:00
libavcodec aacenc: Add support for Perceptual Noise Substitution energy values 2015-04-13 04:14:27 +02:00
libavdevice Merge commit '4f373a5111f900af54301907132942f95276285c' 2015-04-11 02:19:32 +02:00
libavfilter avfilter: add chorus filter 2015-04-11 20:39:43 +00:00
libavformat avformat/rtsp: Fix dereference after null check 2015-04-12 23:31:55 +02:00
libavresample Merge commit '12655c48049f9a52e5504bde90fe738862b0ff08' 2015-02-22 00:06:23 +01:00
libavutil avutil/mips/intreadwrite: build fix for mips64r6 (instruction 'lwl' not supported) 2015-04-10 13:03:44 +02:00
libpostproc postproc: Removed unecessary if/else branch when getting QP. 2015-03-28 01:49:12 +01:00
libswresample swresample/swresample-test: Randomly wipe out channel counts 2015-04-12 22:21:53 +02:00
libswscale swscale/output: Fix undefined shifts 2015-03-25 18:31:25 +01:00
presets presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests tests/fate: added mxf opatom audio regression tests 2015-04-13 02:08:46 +02:00
tools tools/sidxindex: Use av_*malloc_array() 2015-04-01 17:43:25 +02:00
.gitattributes Treat all '*.pnm' files as non-text file 2014-11-28 17:52:43 -05:00
.gitignore doc/examples: add directory listing example 2015-03-28 03:13:44 +01:00
arch.mak configure, mips: remove MIPS32R2, merging it with MIPSFPU 2015-03-06 14:01:31 +01:00
Changelog avfilter: add chorus filter 2015-04-11 20:39:43 +00:00
cmdutils_common_opts.h opts: add list device sources/sinks options 2014-10-25 20:20:31 +02:00
cmdutils_opencl.c cmdutils_opencl: Use av_malloc_array() 2014-07-01 03:49:36 +02:00
cmdutils.c cmdutils: fix "Commmand" typo 2015-04-03 10:43:21 -08:00
cmdutils.h opts: add list device sources/sinks options 2014-10-25 20:20:31 +02:00
common.mak x86: Makefile: fix DBG parameter evaluation 2015-03-11 01:54:07 +01:00
configure configure: add missing h263p decoder dependencies 2015-04-12 15:48:55 -03:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1 cosmetics: Delete empty lines at end of file. 2012-02-09 12:26:45 +01:00
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: add hevc support 2015-01-27 12:37:34 +01:00
ffmpeg_filter.c ffmpeg: fix accurate seeking with -copyts 2014-11-24 17:31:26 +01:00
ffmpeg_opt.c Merge commit '3892bdab9b652eb003ab95e167f1765e0b0ea035' 2015-04-04 00:38:02 +02:00
ffmpeg_vda.c vda: Cast to not discard constant qualifier and silence compiler warning 2015-04-09 01:23:33 +02:00
ffmpeg_vdpau.c Merge commit '1f9237f2ac46dfbed1bfa1f4f0f1314c2a1d62ec' 2014-12-27 13:26:38 +01:00
ffmpeg.c Merge commit '3892bdab9b652eb003ab95e167f1765e0b0ea035' 2015-04-04 00:38:02 +02:00
ffmpeg.h ffmpeg: last frame duplication heuristic 2015-04-03 19:09:31 +02:00
ffplay.c Merge commit 'd450cb07d91ef39ad1d39bd7ca0cfce4bd7b13e7' 2015-03-22 03:51:49 +01:00
ffprobe.c Merge commit '7b9cb7b36543c2a0e46d99b0e41824b9e7dd0c8f' 2015-03-08 23:58:18 +01:00
ffserver_config.c ffserver_config: reflow add_codec() 2014-12-09 01:03:01 -03:00
ffserver_config.h ffserver: dont leak child arguments 2014-11-26 23:32:33 +01:00
ffserver.c ffserver: remove stale debug stanza 2015-03-08 18:24:56 -03:00
INSTALL.md INSTALL: add markdown syntax 2014-05-28 22:38:38 +02:00
library.mak x86/doc/Makefile: DBG=1 to preprocess external asm 2015-02-17 13:08:04 +01:00
LICENSE.md LICENSE.md: Formatting updates 2015-02-12 01:53:56 +01:00
MAINTAINERS MAINTAINERS: Add Lou Logan as server admin as he is root too 2015-04-06 20:24:05 +02:00
Makefile configure, mips: remove MIPS32R2, merging it with MIPSFPU 2015-03-06 14:01:31 +01:00
README.md README: add ffserver 2015-02-12 11:59:22 +01:00
RELEASE RELEASE: update to 2.6.git 2015-03-08 18:59:57 -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.