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FFmpeg git repo
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Ganesh Ajjanagadde 43624a669b lavc/pcm_tablegen: slight speedup of table generation 
This gets rid of some branches to speed up table generation slightly
(impact higher on mulaw than alaw). Tables are identical to before,
tested with FATE.

Sample benchmark (Haswell, GNU/Linux+gcc):
old:
 313494 decicycles in build_alaw_table,    4094 runs,      2 skips
 315959 decicycles in build_alaw_table,    8190 runs,      2 skips

 323599 decicycles in build_ulaw_table,    4095 runs,      1 skips
 318849 decicycles in build_ulaw_table,    8188 runs,      4 skips

new:
 261902 decicycles in build_alaw_table,    4096 runs,      0 skips
 266519 decicycles in build_alaw_table,    8192 runs,      0 skips

 209657 decicycles in build_ulaw_table,    4096 runs,      0 skips
 232656 decicycles in build_ulaw_table,    8192 runs,      0 skips

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
2016-01-04 17:23:24 -08:00
compat
doc avfilter/avf_showspectrum: add option to set gain for calculating color intensity 2016-01-04 14:06:51 +01:00
libavcodec lavc/pcm_tablegen: slight speedup of table generation 2016-01-04 17:23:24 -08:00
libavdevice
libavfilter avfilter/avf_showspectrum: add option to set gain for calculating color intensity 2016-01-04 14:06:51 +01:00
libavformat brstm: fix missing closing brace 2016-01-04 13:44:16 +01:00
libavresample Merge commit 'cc4c24208159200b7aff5b5c313903c7f23fa345' 2016-01-02 10:13:58 +01:00
libavutil avutil/cpu: add missing entry for vfp_vm to av_parse_cpu_caps 2016-01-02 19:07:08 +01:00
libpostproc
libswresample
libswscale swscale/utils: Use normal bilinear scaler if fast cannot be used due to tiny dimensions 2016-01-04 23:54:11 +01:00
presets
tests lavc/qtrle: Use AV_PIX_FMT_PAL8 for 1-bit video 2016-01-04 03:31:35 +01:00
tools
.gitattributes
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arch.mak
Changelog avfilter: add showspectrumpic filter 2016-01-02 18:53:09 +01:00
cmdutils_common_opts.h
cmdutils_opencl.c
cmdutils.c
cmdutils.h
common.mak
configure configure: bump copyright year to 2016 2016-01-02 16:28:31 -03:00
COPYING.GPLv2
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CREDITS
ffmpeg_dxva2.c
ffmpeg_filter.c
ffmpeg_opt.c
ffmpeg_qsv.c
ffmpeg_vdpau.c
ffmpeg_videotoolbox.c
ffmpeg.c
ffmpeg.h
ffplay.c
ffprobe.c ffprobe: avoid unnecessary pow and exp2 calls 2015-12-29 08:59:16 -08:00
ffserver_config.c
ffserver_config.h
ffserver.c ffserver: Cast time_t value when using it in a format string. 2015-12-29 16:00:34 +01:00
INSTALL.md
library.mak
LICENSE.md
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Makefile
README.md
RELEASE
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.