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Andreas Rheinhardt 0cfc7418bb avcodec/ffv1dec: Fix data races emanating from copying whole context 
When using frame threading, the FFV1 decoder's update_thread_context()
function copies the whole context and afterwards restores some allocated
fields with backups made earlier. Among these fields are the
ThreadFrames and the source context's ThreadFrames can change
concurrently without any synchronization, leading to data races which
are undefined behaviour even if they don't lead to problems in
practice (as the destination's own ThreadFrames are restored directly
thereafter).

Fix this by only copying the actually needed fields.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2023-09-30 23:05:42 +02:00
compat configure: Set WIN32_LEAN_AND_MEAN at configure time 2023-08-14 22:57:28 +03:00
doc avutil: add GBRAP14 format support 2023-09-28 19:36:08 +02:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools fftools/ffmpeg: deprecate the -top option 2023-09-18 17:16:06 +02:00
libavcodec avcodec/ffv1dec: Fix data races emanating from copying whole context 2023-09-30 23:05:42 +02:00
libavdevice avdevice/lavfi: Fix double-free on error 2023-09-30 12:27:44 +02:00
libavfilter avfilter/f_ebur128: do not print summary log if nothing was processed 2023-09-29 18:40:54 +02:00
libavformat avformat/mov: Check avif_info 2023-09-29 23:08:38 +02:00
libavutil libavutil/hwcontext_cuda: don't destroy external context when using current CUDA context 2023-09-29 19:42:11 +02:00
libpostproc version.h: Bump minor post 6.0 branch 2023-02-19 18:37:36 +01:00
libswresample libswresample/swresample: avoid s16p internal transfer format 2023-09-25 21:41:35 +02:00
libswscale swscale: add GBRAP14 format support 2023-09-28 19:37:58 +02:00
presets
tests fate: add forgotten changes for GBRAP14 2023-09-28 20:07:48 +02:00
tools tools/target_dec_fuzzer: Adjust threshold for rtv1 2023-09-22 23:47:40 +02:00
.gitattributes
.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
.mailmap mailmap: stop git lying about who I commit things as 2022-11-04 19:37:46 +01:00
.travis.yml
Changelog lavc/vaapi_encode: Add VAAPI AV1 encoder 2023-09-22 13:15:00 +08:00
configure configure: Remove unnecessary vf_spp->fft dependency 2023-09-29 01:44:46 +02:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS Use https for repository links 2023-03-01 21:59:10 +01:00
INSTALL.md
LICENSE.md
MAINTAINERS MAINTAINERS: change Leo Izen IRC nickname 2023-06-20 12:46:47 -04:00
Makefile tools: add an AV_CODEC_CAP_ENCODER_RECON_FRAME test tool 2023-03-28 13:00:42 +02:00
README.md
RELEASE RELEASE: update after 5.1 branch 2022-07-13 00:31:42 +02:00

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 means to alter decoded audio and video through a directed graph of connected 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.