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PCR generation was based on counting packets for both CBR and VBR streams. Couting packets might have worked for CBR streams (when muxrate was specified) but it only took into account the packets of a service (or the packets of the PCR stream lately), so even that was problematic for multi program streams. The new code works on actual timestamps for both CBR and VBR streams. For VBR streams the behaviour of the old code is simulated by selecting a PCR interval which is the highest multiple of the frame duration but still less than 100 ms. It should be trivial to add support for setting the PCR interval for VBR streams as well in a later patch. The accuracy of PCR packets for CBR streams was greatly improved by preemtively sending them at PCR intervals even if sending the payload of another stream is in progress. This may fix these tickets: - #5750 - #7524 Signed-off-by: Marton Balint <cus@passwd.hu>
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 a mean to alter decoded Audio and Video through chain of 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.