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Up until now if avcodec_send_packet() returned an error, no attempt to receive a frame from the decoder would be made. Instead the decoder was presumed to be drained, so that more packets could be sent to it. Yet this need not be so: It can happen that a packet would decode to multiple frames and that decoding the first of these (the one that is decoded during the avcodec_send_packet() call) returns an error, in which case the decoder is not yet ready to receive more input as the remaining parts of the packet have not been decoded yet. In this case, an AERROR_BUG is triggered. This happens in ticket #11553 with VP9 (which uses a BSF to split VP9 superframes and is therefore affected by this). Fix this by always calling avcodec_receive_frame() unless xerror is set. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.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.