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This feature fundamentally relies on host-visible VRAM, which restricts the set of available memory types to (typically) host-visible device-local ones. When resizable BAR is disabled, this memory type is usually limited to e.g. 256 MiB in size, which is just plain insufficient for allocation of general purpose GPU images, causing OOM errors on even the simplest of commands. The easiest solution is to disable host transfers entirely on machines without host-addressable VRAM. In theory, we could try and recover the use of host transfers for images which are *not* restricted to device-local memory types, but this is rarely the case in practice, and the effort required would exceed the benefit, especially since ReBAR is a standard feature on all platforms recent enough to have Vulkan drivers, and only occasionally disabled in the UEFI for by default for some hare-brained notion of "backwards compatibiility" with ancient software.
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.