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When there are multiple candidates for macroblock type, the encoder tries them all. In order to do so, it keeps several sets of states containing the variables that get modified when encoding the macroblock and in the end uses the best of these. Yet one variable was set, but not included in this state: The current macroblock's qscale value in the current picture's qscale_table. This may currently be set multiple times in mpv_reconstruct_mb(), yet it is read when adaptive_quant is true. Currently, the value read can be the value set by the last attempt to write the current macroblock and not the initial value. Fix this by only setting the qscale_table value in one place outside of mpv_reconstruct_mb() (where it does not belong at all). Reviewed-by: Ramiro Polla <ramiro.polla@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.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.