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With the necessary pixel formats defined, we can now expose support for the remaining 10/12bit combinations that VAAPI can handle. Specifically, we are adding support for: * HEVC ** 12bit 420 ** 10bit 422 ** 12bit 422 ** 10bit 444 ** 12bit 444 * VP9 ** 10bit 444 ** 12bit 444 These obviously require actual hardware support to be usable, but where that exists, it is now enabled. Note that unlike YUVA/YUVX, the Intel driver does not formally expose support for the alphaless formats XV30 and XV360, and so we are implicitly discarding the alpha from the decoder and passing undefined values for the alpha to the encoder. If a future encoder iteration was to actually do something with the alpha bits, we would need to use a formal alpha capable format or the encoder would need to explicitly accept the alphaless format.
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.