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Reproduce: ffmpeg -i /tmp/bwdif_test_input_160x4_gray16.jpg -vf "bwdif" -f null - filter_intra accesses rows 3 lines away via cur[mrefs3] and cur[prefs3]. For small height videos (h <= 4), this causes heap-buffer-overflow. Add boundary check for filter_intra when YADIF_FIELD_END is set. The boundary condition (y < 3) or (y + 3 >= td->h) precisely matches filter_intra's 3-line context requirement. Test file: 160x4 gray16 JPEG https://code.ffmpeg.org/attachments/db2ace24-bc00-4af6-a53a-5df6b0d51b15 fix #21570 Reviewed-by: Thomas Mundt <tmundt75@gmail.com> Signed-off-by: Jun Zhao <barryjzhao@tencent.com>
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.