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FFmpeg git repo
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Ganesh Ajjanagadde def3c83e1b lavc/aacsbr: sbr_dequant optimization 
This uses ff_exp2fi to get a speedup (~ 6x).

sample benchmark (Haswell, GNU/Linux):
old:
  19102 decicycles in sbr_dequant,    1023 runs,      1 skips
  19002 decicycles in sbr_dequant,    2045 runs,      3 skips
  17638 decicycles in sbr_dequant,    4093 runs,      3 skips
  15825 decicycles in sbr_dequant,    8189 runs,      3 skips
  16404 decicycles in sbr_dequant,   16379 runs,      5 skips

new:
   3063 decicycles in sbr_dequant,    1024 runs,      0 skips
   3049 decicycles in sbr_dequant,    2048 runs,      0 skips
   2968 decicycles in sbr_dequant,    4096 runs,      0 skips
   2818 decicycles in sbr_dequant,    8191 runs,      1 skips
   2853 decicycles in sbr_dequant,   16383 runs,      1 skips

Reviewed-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
2015-12-19 09:32:53 -08:00
compat
doc doc/filters: copy all input modes to output modes. 2015-12-18 15:15:45 +01:00
libavcodec lavc/aacsbr: sbr_dequant optimization 2015-12-19 09:32:53 -08:00
libavdevice
libavfilter avfilter/vf_delogo: change the definition of logo_x2 and logo_y2 2015-12-19 03:12:31 +01:00
libavformat nutdec: reject negative value_len in read_sm_data 2015-12-19 17:57:56 +01:00
libavresample
libavutil lavu/error: add missing error messages for errors supported on all platforms 2015-12-18 04:04:14 +01:00
libpostproc
libswresample
libswscale swscale/arm/yuv2rgb: simplify process_16px_* macro call 2015-12-19 10:42:33 +01:00
presets
tests fate: increase FUZZ by 1 for aac-tns-encode 2015-12-13 23:28:53 +01:00
tools
.gitattributes
.gitignore
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arch.mak
Changelog movenc: support cenc (common encryption) 2015-12-15 14:16:28 +01:00
cmdutils_common_opts.h
cmdutils_opencl.c
cmdutils.c
cmdutils.h
common.mak
configure lavu/random_seed: use arc4random() when available 2015-12-17 08:12:41 -08:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
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CREDITS
ffmpeg_dxva2.c
ffmpeg_filter.c
ffmpeg_opt.c ffmpeg: Allow specifying the program number for created programs 2015-12-16 14:03:57 +01:00
ffmpeg_qsv.c
ffmpeg_vdpau.c
ffmpeg_videotoolbox.c
ffmpeg.c Merge commit 'e63e3797a1ed9346f529848e6ba3d27fd2d2cc8d' 2015-12-17 13:20:37 +01:00
ffmpeg.h
ffplay.c ffplay: remove existing AVPicture usage 2015-12-19 14:09:26 +01:00
ffprobe.c ffprobe: use print_val to print the frame pkt_size value 2015-12-16 18:59:23 +01:00
ffserver_config.c
ffserver_config.h
ffserver.c ffserver: refactor build_feed_streams() 2015-12-19 01:52:20 -08:00
INSTALL.md
library.mak
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README.md
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version.sh

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.

Contributing

Patches should be submitted to the ffmpeg-devel mailing list using git format-patch or git send-email. Github pull requests should be avoided because they are not part of our review process. Few developers follow pull requests so they will likely be ignored.