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See https://trac.ffmpeg.org/ticket/7687 If an encoded frame is returned split over two or more IL buffers due to the size, then there is a race between whether get_buffer will fail, return NULL, and a truncated frame is passed on, or IL will return the remaining part of the encoded frame. If get_buffer returns NULL, part of the frame is left behind in the codec, and will be collected on the next call. That then leaves a frame stuck in the codec. Repeat enough times and the codec FIFO is full, and the pipeline stalls. A performance improvement in the Raspberry Pi firmware means that the timing has changed, and now frequently drops into the case where get_buffer returns NULL. Add code such that should a buffer be received without OMX_BUFFERFLAG_ENDOFFRAME that get_buffer is called with wait set, so we wait for the remainder of the frame. This code has been made conditional on the Pi build in case other IL implementations don't handle ENDOFFRAME correctly. Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org> Signed-off-by: Aman Gupta <aman@tmm1.net> Signed-off-by: Martin Storsjö <martin@martin.st>
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.