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Currently those are set in different ways depending on whether the stream is decoded or not, using some values from the decoder if it is. This is wrong, because there may be arbitrary amount of delay between input packets and output frames (depending e.g. on the thread count when frame threading is used). Always use the path that was previously used only for streamcopy. This should not cause any issues, because these values are now used only for streamcopy and discontinuity handling. This change will allow to decouple discontinuity processing from decoding and move it to ffmpeg_demux. It also makes the code simpler. Changes output in fate-cover-art-aiff-id3v2-remux and fate-cover-art-mp3-id3v2-remux, where attached pictures are now written in the correct order. This happens because InputStream.dts is no longer reset to AV_NOPTS_VALUE after decoding, so streamcopy actually sees valid dts values.
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.