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551041e384
We queried the decoder whether it was able to decode sucessfully, but since we operated asynchronously, we weren't able to do anything with this information but let the user know decoding failed for the previous frame(s). Since we parse the slice headers ourselves and we're reasonably sure we can decode before actually starting to decode, this was rarely triggered on corrupt data, and hardware's understanding of whether there was an error or not is vague. There's also a semantic problem with our use of the queries - if there's a seek, we flush, but what happens to the queries is vague according to the spec. Most hardware dealt fine, since queries are nothing more than GPU memory with integers stored. But with Intel, they seem to be more of a register to which a driver must keep track of, leading to issues if there's been a reset (seek) and we query the previous submission before the seek. Just get rid of them. The query code is still used in encoding. This fixes seeking with HEVC and AV1 on Intel.
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.