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If the number of CTUs reduces between one picture and the next, the slice_idx table is reduced in size in the frame_context_for_each_tl call on vvcdec.c:321. When initialising the slice_idx table on vvcdec.c:325, the old code uses fc->tab.sz.ctu_count when calculating the table size. fc->tab.sz.ctu_count holds the old ctu count at this point however, not being updated to hold the new ctu count until vvcdec.c:342. This causes an out-of-bounds write. Patch fixes the problem by using pps->ctb_count, which was just used when allocating the table, in place of fc->tab.sz.ctu_count when initialising the table. Signed-off-by: Frank Plowman <post@frankplowman.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.