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b51217381d
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Ronald S. Bultje b51217381d pthread_frame: call update_context_from_user() after acquiring lock. 
Otherwise the thread may still be in the middle of decoding a previous
frame, which would effectively trigger a race condition on any field
concurrently read and written.

In practice, this fixes tsan warnings like the following:

WARNING: ThreadSanitizer: data race (pid=17380)
  Write of size 4 at 0x7d64000160fc by main thread:
    #0 update_context_from_user src/libavcodec/pthread_frame.c:335 (ffmpeg+0x000000dca515)
[..]
  Previous read of size 4 at 0x7d64000160fc by thread T2 (mutexes: write M1821):
    #0 ff_thread_report_progress src/libavcodec/pthread_frame.c:565 (ffmpeg+0x000000dcb08a)

(cherry picked from commit 1269cd5b6f)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2017-04-13 02:29:26 +02:00
compat compat/atomics: fix atomic_fetch_xor 2017-04-02 00:57:17 -03:00
doc Update for 3.3 2017-04-12 02:24:58 +02:00
libavcodec pthread_frame: call update_context_from_user() after acquiring lock. 2017-04-13 02:29:26 +02:00
libavdevice Bump minor for 3.3 2017-04-02 19:49:45 +02:00
libavfilter avfilter/vf_framerate: always request input if no output is provided in request_frame 2017-04-12 21:08:45 +02:00
libavformat avformat/movenc: auto insert vp9_superframe bsf when needed 2017-04-12 20:53:55 -03:00
libavresample Bump minor for 3.3 2017-04-02 19:49:45 +02:00
libavutil Revert "avutil/avstring: add av_strreplace API into avstring" 2017-04-11 08:05:54 +08:00
libpostproc Bump minor for 3.3 2017-04-02 19:49:45 +02:00
libswresample Bump minor for 3.3 2017-04-02 19:49:45 +02:00
libswscale Bump minor for 3.3 2017-04-02 19:49:45 +02:00
presets
tests tests/fate/filter-video: fix framerate filter tests 2017-04-12 21:09:18 +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
.travis.yml
arch.mak
Changelog Changelog: fix position of VAAPI MPEG-2/VP8 encode entry 2017-04-02 23:20:19 +01:00
cmdutils_common_opts.h
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
common.mak Merge commit '93d5b022a9fd3a1a1f9c521a1eac7f0410e05b81' 2017-03-23 17:57:35 -03:00
configure configure: Fix decklink license dependency. 2017-04-12 22:51:03 +02:00
CONTRIBUTING.md
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
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
ffmpeg_videotoolbox.c ffmpeg_videotoolbox: fix usage of av_get_codec_tag_string() 2017-03-29 14:49:29 +02:00
ffmpeg.c ffmpeg: make transcode_init_done atomic. 2017-04-13 02:29:26 +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: only use custom logging callback if -show_log is set 2017-04-12 21:09:32 +02:00
ffserver_config.c
ffserver_config.h
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
RELEASE Update for 3.3 2017-04-12 02:24:58 +02:00
RELEASE_NOTES add release notes based on release 3.2 2017-04-12 03:12:19 +02:00
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 and will be ignored.