Fiddle with OpenRGB and see if it works. If it doesn’t, check if there’s any open issues for your model of card - you might be able to aid testing, and if you’re likely, someone might have already made a branch that hasn’t been merged yet. That was the case with my keyboard.

Googling it, some might also have support for using hooking to the motherboard RGB header instead of internal controls.

Tried that already.

Based on the report, this seems to be an actual bug - it was working fine for everyone before the update and only happens in the presence of FluidSynth.

Ubuntu probably hasn’t had this version of PipeWire yet.

My work around is working just fine for now, though.

I’ve done it with ffmpeg before - I think the command’s on the Arch wiki. I preserved subtitles as well. I overall remember it being pretty reasonable since I didn’t set it up to re-encode, just pass through original video.