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Andreas Rheinhardt bd95f2f599 avcodec/vp9: Do not destroy uninitialized mutexes/conditions 
Also do not destroy and reinitialize mutexes and conditions when
certain input parameters change. Given that the decoder did not
create these variables at all during init, uninitialized mutexes
and conditions are destroyed before the very first initialization.
This is undefined behaviour and certain threading implementations
like pthreadGC2 crash when it is attempted.

Fix this by initializing these objects once during init and freeing
them in close.

Reported-by: Steve Lhomme <robux4@ycbcr.xyz>
Reviewed-by: Steve Lhomme <robux4@ycbcr.xyz>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2021-09-04 08:02:56 +02:00
compat compat/cuda: add __expf() implementation 2021-08-14 15:06:47 +02:00
doc avcodec/avcodec: Allow up to seven codec ids per parser 2021-09-02 19:02:35 +02:00
ffbuild avfilter: compress CUDA PTX code if possible 2021-06-22 14:05:44 +02:00
fftools fftools/ffmpeg: Remove unused fields 2021-09-03 19:43:53 +02:00
libavcodec avcodec/vp9: Do not destroy uninitialized mutexes/conditions 2021-09-04 08:02:56 +02:00
libavdevice avdevice/decklink: support for more duplex mode for Decklink 8K Pro 2021-08-16 10:00:39 +08:00
libavfilter avfilter/af_silencedetect: add planar sample formats support 2021-09-02 21:34:17 +02:00
libavformat avformat/mux: Fix double-free when using AVPacket.opaque_ref 2021-09-03 19:23:18 +02:00
libavutil lavu/slicethread: return ENOSYS rather than EINVAL in the dummy func 2021-08-29 18:45:04 +02:00
libpostproc postproc/postprocess: Remove legacy cruft 2021-07-29 22:02:06 +02:00
libswresample (postproc|swresample)/version: Don't include libavutil/avutil.h 2021-07-29 22:02:05 +02:00
libswscale avutil/internal, swresample/audioconvert: Remove cpu.h inclusions 2021-07-22 14:33:45 +02:00
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tests fate/wma: Account for trimmed samples in wmapro-ism test 2021-09-02 19:59:34 +02:00
tools tools/dvd2concat: use option keyword 2021-08-22 11:44:17 +02:00
.gitattributes fate: add SCC test 2017-01-27 17:06:42 +01:00
.gitignore avfilter: compress CUDA PTX code if possible 2021-06-22 14:05:44 +02:00
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.travis.yml Merge commit '899ee03088d55152a48830df0899887f055da1de' 2019-03-14 15:53:16 -03:00
Changelog avformat: add an AV1 Low overhead bitstream format muxer 2021-09-01 19:55:30 -03:00
configure avformat: add an AV1 Low overhead bitstream format muxer 2021-09-01 19:55:30 -03:00
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INSTALL.md INSTALL.md: Fix Markdown formatting 2019-01-31 10:29:16 -09:00
LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS avformat: add Argonaut Games CVG demuxer 2021-05-12 20:25:50 +10:00
Makefile FATE: add a test for sliced scaling 2021-08-08 19:26:05 +02:00
README.md Remove the ffserver program 2018-01-06 18:31:37 +00:00
RELEASE Bump Versions before release/4.4 branch 2021-03-20 01:01:12 +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.
  • 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.