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panboxiaosa
b57a3d028d
STTS sample deltas follow decode order, while AVPacket.duration is defined as the interval to the next PTS in presentation order. Assigning the deltas directly therefore produces incorrect packet durations for VFR video with reordered frames. After index construction and edit-list processing, sort samples by PTS and set every duration with a following PTS from adjacent presentation timestamps. This reorders STTS durations where possible and derives intervals produced by the STTS/CTTS combination when necessary. Keep the original timing table if allocation fails or timestamps are invalid. Add FATE coverage for the official VFR H.264 sample and for a generated MPEG-4 case whose presentation intervals are not a permutation of its STTS deltas. Update the HEVC dts2pts CRA reference for the corrected presentation-order durations. Signed-off-by: panboxiaosa <panboxiaosa@gmail.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.