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58569162c2
The existing version which was cherry-picked from Libav does not work with FFmpeg framework, because ff_request_frame() was totally different between Libav (recursive) and FFmpeg (non-recursive). The existing overlay_qsv implementation depends on the recursive version of ff_request_frame to trigger immediate call to request_frame() on input pad. But this has been removed in FFmpeg since "lavfi: make request_frame() non-recursive." Now that we have handy framesync support in FFmpeg, so I make it work based on framesync. Some other fixing which is also needed to make overlay_qsv work are put in a separate patch. Signed-off-by: Ruiling Song <ruiling.song@intel.com> (cherry picked from commit f3341a0452419c57faf4d28aebb24be5d41312f3)
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.