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Ronald S. Bultje e72690b18d h264: don't sync pic_id between threads. 
This is how the ref list manager links bitstream IDs to H264Picture/Ref
objects, and is local to the producer thread. There is no need for the
consumer thread to know the bitstream IDs of its references in their
respective producer threads.

In practice, this fixes tsan warnings when running fate-h264:

WARNING: ThreadSanitizer: data race (pid=19295)
  Read of size 4 at 0x7dbc0000e614 by main thread (mutexes: write M1914):
    #0 ff_h264_ref_picture src/libavcodec/h264_picture.c:112 (ffmpeg+0x0000013b3709)
[..]
  Previous write of size 4 at 0x7dbc0000e614 by thread T2 (mutexes: write M1917):
    #0 build_def_list src/libavcodec/h264_refs.c:91 (ffmpeg+0x0000013b46cf)
2017-04-03 09:27:04 -04:00
compat compat/atomics: fix atomic_fetch_xor 2017-04-02 00:57:17 -03:00
doc doc/libav-merge: document hlsenc encryption state 2017-04-01 18:21:34 +02:00
libavcodec h264: don't sync pic_id between threads. 2017-04-03 09:27:04 -04:00
libavdevice Bump versions for master after 3.3 2017-04-02 19:54:12 +02:00
libavfilter Bump versions for master after 3.3 2017-04-02 19:54:12 +02:00
libavformat Bump versions for master after 3.3 2017-04-02 19:54:12 +02:00
libavresample Bump versions for master after 3.3 2017-04-02 19:54:12 +02:00
libavutil Bump versions for master after 3.3 2017-04-02 19:54:12 +02:00
libpostproc Bump versions for master after 3.3 2017-04-02 19:54:12 +02:00
libswresample Bump versions for master after 3.3 2017-04-02 19:54:12 +02:00
libswscale Bump versions for master after 3.3 2017-04-02 19:54:12 +02:00
presets
tests fate : add test for exr with offset table set to 0 2017-04-03 03:02:50 +02:00
tools tools/fourcc2pixfmt: fix usages of av_get_codec_tag_string() 2017-03-29 14:49:29 +02:00
.gitattributes fate: add SCC test 2017-01-27 17:06:42 +01:00
.gitignore Merge commit '6641819feedb086ebba3d2be89b8d33980f367e1' 2016-06-26 15:43:05 +02:00
.travis.yml
arch.mak mips: rename mipsdspr1 to mipsdsp 2015-12-04 02:35:42 +01:00
Changelog Changelog: fix position of VAAPI MPEG-2/VP8 encode entry 2017-04-02 23:18:42 +01:00
cmdutils_common_opts.h cmdutils: add show_demuxers and show_muxers 2016-11-08 01:56:31 +01:00
cmdutils_opencl.c cmdutils_opencl: fix resource_leak cid 1396852 2017-01-13 07:54:49 +08:00
cmdutils.c avformat, ffmpeg: deprecate old rotation API 2017-03-27 13:20:27 +02:00
cmdutils.h cmdutils: add show_demuxers and show_muxers 2016-11-08 01:56:31 +01:00
common.mak Merge commit '93d5b022a9fd3a1a1f9c521a1eac7f0410e05b81' 2017-03-23 17:57:35 -03:00
configure Merge commit 'ffe89e1edb0281ff65d1bda88253784e9283b717' 2017-04-01 11:29:34 +02:00
CONTRIBUTING.md Add CONTRIBUTING.md 2016-09-18 10:02:13 +01:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
ffmpeg_cuvid.c ffmpeg_cuvid: adapt for recent filter graph initialization changes 2017-03-03 08:45:43 +01:00
ffmpeg_dxva2.c Merge commit '18c506e9e6e8df8b1d496d093077b8240ea68c28' 2016-06-26 15:34:01 +02:00
ffmpeg_filter.c ffmpeg: Remove hw_device_ctx output filter reinit hack 2017-03-26 20:38:44 +01:00
ffmpeg_opt.c Merge commit '01348e411f962f5e4605d649fc9a47a54587ba8e' 2017-03-31 16:46:00 -03:00
ffmpeg_qsv.c ffmpeg: init filtergraphs only after we have a frame on each input 2017-03-03 08:45:43 +01:00
ffmpeg_vaapi.c ffmpeg_vaapi: Always set hwaccel_ctx, so it gets properly cleaned up on error 2017-02-05 15:13:15 +00:00
ffmpeg_vdpau.c Merge commit 'f72db3f2f3a8c83a4f5dede8fa03434b2bf676c6' 2016-06-26 15:29:39 +02:00
ffmpeg_videotoolbox.c ffmpeg_videotoolbox: fix usage of av_get_codec_tag_string() 2017-03-29 14:49:29 +02:00
ffmpeg.c ffmpeg: Fix avframe memleak 2017-03-30 16:34:06 +02:00
ffmpeg.h avformat, ffmpeg: deprecate old rotation API 2017-03-27 13:20:27 +02:00
ffplay.c ffplay: change keyboard volume control to logarithmic 2017-02-08 22:36:42 +01:00
ffprobe.c ffprobe: use av_spherical_projection_name() to print spherical projection names 2017-03-31 13:27:09 -03:00
ffserver_config.c ffserver_config: Check for failure to allocate FFServerIPAddressACL 2016-12-22 19:23:08 +01:00
ffserver_config.h ffsrever: Make the status page bitexact if any stream is bitexact 2016-11-29 19:26:26 +01:00
ffserver.c ffserver: local OOB write with custom program name 2017-01-08 03:50:56 +01:00
INSTALL.md
library.mak Merge commit '93d5b022a9fd3a1a1f9c521a1eac7f0410e05b81' 2017-03-23 17:57:35 -03:00
LICENSE.md Merge commit '4fef648d10bf3bcfd4b8fa5755c1128966a2427c' 2017-03-15 22:07:47 +01:00
MAINTAINERS MAINTAINERS: Add Rodger Combs to ffmpeg-security 2017-02-28 01:13:52 +01:00
Makefile Merge commit '7c9e2b295e4f70e8fedf9cceb12d95399a859a9c' 2017-03-23 20:54:20 -03:00
README.md Add CONTRIBUTING.md 2016-09-18 10:02:13 +01:00
RELEASE Bump minor versions for master after release/3.3 branchpoint 2017-03-31 13:21:06 +02:00
version.sh version.sh: Fix spurious rebuilds. 2016-03-10 09:53:10 +01:00

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.

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 and will be ignored.