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Lynne
2f0c34b10e
A Vulkan DPB slot only becomes active once a decode operation sets it up, and from then on holds exactly the picture resource that was decoded into it. The H.264 decoder however hands us references that never went through the hwaccel: the dummies it synthesizes to fill frame_num gaps and to stand in for missing references, and fields lost to a seek. Binding those as active slots fails validation (VUIDs 07239, 07265, 07266, 07151), and since the slot lookup for long-term references only searched the first 16 pictures and fell back to slot 0, a resource could end up bound twice (07238, 07264). Track, per picture, which fields were actually decoded into its slot, and bind only the references, and only the fields of them, that were: vk_h264_fill_pict returns 1 when it bound the picture and 0 when it cannot be bound, and the reference loops advance by that. Use the picture's index in the DPB as its slot directly instead of searching for it, and describe the setup slot by the structure of the picture being decoded rather than by its reference marking, which does not describe the slot's contents while decoding the second field of a pair.
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.