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If a PAT is finished while a PMT section filter is opened but not yet finished, the PMT section filter is closed and all the received data is discarded. This is usually not an issue but some multiplexers (With very quick PAT/PMT repetition settings) consistently emit a PMT section start, then a PAT, and then the rest of the PMT, causing the aforementioned behavior to result in no PMT being finished. In the most pathologic situation the stream information are lost and the probe fallback miscategorizes subtitles as mp3 audio. Avoid the issue through eliminating redundant PSI/SI table updates by checking their version field, which is required by the standard to be incremented on every change no matter how minor. CC: libav-stable@libav.org Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Libav
Libav 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.libavresampleimplements audio mixing and resampling routines.libswscaleimplements color conversion and scaling routines.
Tools
- avconv is a command line toolbox to manipulate, convert and stream multimedia content.
- avplay is a minimalistic multimedia player.
- avprobe is a simple analisys 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
Conding examples are available in the doc/example directory.
License
Libav codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.