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NVIDIA broke its own API when using VDPAU decoding. If you retrieve the decoded YUV data, or if you map the surfaces with GL interop, the result are interlacing artifacts. The only way to get non-broken data is by using the vdpau video mixer to convert it to RGB. There is no way to block the non-working operations in a reasonable way (a VdpVideoSurface has to support all operations). NVIDIA refuses to fix this issue (they "fixed" it by making it work with the video mixer, but the rest is still broken). There is no sign of that changing. Do not use HEVC by default with the generic hwaccle API. Detect whether it's the NVIDIA native implementation, and exit with an error. (The same thing work with the MESA implementation.) As an escape hatch and to allow applications to use the decoder if they really want to (perhaps because they make sure to explicitly use the video mixer), reuse AV_HWACCEL_FLAG_ALLOW_PROFILE_MISMATCH to disable this check. Once NVIDIA fixes the bug, working driver versions could be detected, and it could be allowed again.
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.
- ffserver is a multimedia streaming server for live broadcasts.
- 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.