Quicksync support on linux

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With Intel DGPUs becoming more popular, It would be nice to support quicksync on linux. Current'y vaapi for intel cards is lackluster to say the least and in most cases it's just downright bad. While sunshine massively suffers because of this, it's not a sunshine specific issue. Currently I use software encoding but that can sometimes be a noticable issue depending on the game.

[ReenigneArcher]

Interesting since vaapi was originally an Intel project.

[ramirocantu]

Could be a driver issue, here is some relevant discussion on reddit about plex engineers tackling encoding on intel battlemage gpus
https://www.reddit.com/r/PleX/comments/1kavxgk/intel_arc_on_linux_vaapi_transcoding_broken_in/

The driver you need on linux is the intel media driver. Ensure you are on a recent version, at least 24.3.4 (says initial support for battlemage, so newer is better).

Personally I want to try doing an intel oneVPL implementation instead of using ffmpeg in sunshine since the new media engines are able to do color conversion instead of having to do a compute shader, I wonder if it would be performant. FFmpeg is built on this new library but doesn't expose everything so it could just end up having no improvement.