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c49f6bec20
The VVC probe only checked forbidden_zero_bit but not nuh_layer_id range in the NAL unit header. This allowed certain MP3 files to be misdetected as VVC streams because their frame data coincidentally contained 00 00 01 start code patterns that looked like valid NAL units. Add a check for nuh_layer_id (must be <= 55). The existing check_temporal_id() already validates nuh_temporal_id_plus1 is in [1, 7]. Together these two checks reject the bogus NAL units produced by MP3 frame data. Note: nuh_reserved_zero_bit is intentionally not checked here, as it is reserved for future use by the spec and may become non-zero in a later revision. 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.