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These fields are ad-hoc and will be deprecated. Use the recently-added AV_CODEC_FLAG_COPY_OPAQUE to pass arbitrary user data from packets to frames. Changes the result of the flcl1905 test, which uses ffprobe to decode wmav2 with multiple frames per packet. Such packets are handled internally by calling the decoder's decode callback multiple times, offsetting the internal packet's data pointer and decreasing its size after each call. The output pkt_size value before this commit is then the remaining internal packet size at the time of each internal decode call. After this commit, output pkt_size is simply the size of the full packet submitted by the caller to the decoder. This is more correct, since internal packets are never seen by the caller and should have no observable outside effects.
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.