Document env vars for video decoding
Open
Nobody has claimed this yet.
enhancement
- Dominant language
- SCSS
- Stars
- 3
- Forks
- 16
- Avg merge
- 1h 7m
- Merged PRs (30d)
- 1
Description
Some video encoders / decoders are only enabled through env vars.
https://github.com/mpv-player/mpv/issues/11739
Global
The Vulkan Video Decoding specs only cover H.264, H.265, and AV1. Older codecs will require you to use your traditional hardware decoding API (VAAPI, nvdec, dx11va, etc) for now, and possibly forever - depending on whether effort is put into exposing older codecs.
Intel
You must set ANV_VIDEO_DECODE=1 in your environment to expose video decoding
Both H.264 and H.265 are supported
VK_EXT_descriptor_buffer support, required for Vulkan filters, has been [merged](https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22151) but no release includes it yet
AMD
You must set RADV_PERFTEST=video_decode in your environment to expose video decoding
Both H.264 and H.265 are supported
Vulkan filters are supported
Nvidia
Both H.264 and H.265 are supported
AV1 is supported with > 550.54.14 drivers
Vulkan filters are supported
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Review the documentation area for existing video-decoding guidance, then compare it with the linked mpv issue and the Intel, AMD, and Nvidia details in this report. Done means the relevant environment variables, supported codecs, and driver notes are documented in the appropriate place.
Written by the indexing model from the issue text.
Assessment
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100