mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2026-11-06 05:17:42 +00:00
Kacper Michajłow
a35157abb9
A colocated field picture always takes the field branch, but macroblocks
that were never decoded in a broken field picture keep a stale mb_type
without MB_TYPE_INTERLACED. The later IS_INTERLACED(mb_type_col[0])
check then picked the frame to frame path with the field remapping,
which reads the colocated motion vectors past the end of the picture.
Set the flag on the colocated type whenever the field branch is taken,
decoded macroblocks have it already.
Fixes: heap-buffer-overflow (read)
Fixes: 553213954/clusterfuzz-testcase-minimized-fuzzer_loadfile_mkv-6112026834042880
Found-by: https://github.com/google/oss-fuzz/tree/master/projects/mpv
Signed-off-by: Kacper Michajłow <kasper93@gmail.com>
(cherry picked from commit 2546b6f061)
FFmpeg README
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodecprovides implementation of a wider range of codecs.libavformatimplements streaming protocols, container formats and basic I/O access.libavutilincludes hashers, decompressors and miscellaneous utility functions.libavfilterprovides means to alter decoded audio and video through a directed graph of connected filters.libavdeviceprovides an abstraction to access capture and playback devices.libswresampleimplements audio mixing and resampling routines.libswscaleimplements 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,ismindexandqt-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.