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Frank Plowman d72a5fe719 lavc/vvc: Prevent overflow in chroma QP derivation 
On the top of p. 112 in VVC (09/2023):

It is a requirement of bitstream conformance that the values of
qpInVal[ i ][ j ] and qpOutVal[ i ][ j ] shall be in the range
of −QpBdOffset to 63, inclusive for i in the range of 0 to
numQpTables − 1, inclusive, and j in the range of 0 to
sps_num_points_in_qp_table_minus1[ i ] + 1, inclusive.

Additionally, don't discard the return code from sps_chroma_qp_table.

Signed-off-by: Frank Plowman <post@frankplowman.com>
2024-06-12 20:48:08 +08:00
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libavcodec lavc/vvc: Prevent overflow in chroma QP derivation 2024-06-12 20:48:08 +08:00
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libavformat avformat/riff: Declare VCR2 to be MPEG-2 2024-06-12 11:44:10 +02:00
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tests api/api-band-test: Query codec capabilities to decide admissibility 2024-06-12 14:29:30 +02:00
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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.