c9fe9fb863
This commit adds support for VP8 bitstream read methods to the cbs codec. This enables the trace_headers bitstream filter to support VP8, in addition to AV1, H.264, H.265, and VP9. This can be useful for debugging VP8 stream issues. The CBS VP8 implements a simple VP8 boolean decoder using GetBitContext to read the bitstream. Only the read methods `read_unit` and `split_fragment` are implemented. The write methods `write_unit` and `assemble_fragment` return the error code AVERROR_PATCHWELCOME. This is because CBS VP8 write is unlikely to be used by any applications at the moment. The write methods can be added later if there is a real need for them. TESTS: ffmpeg -i fate-suite/vp8/frame_size_change.webm -vcodec copy -bsf:v trace_headers -f null - Signed-off-by: Jianhui Dai <jianhui.j.dai@intel.com> Signed-off-by: Ronald S. Bultje <rsbultje@gmail.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.