@Chainik
Yeah, that's the thing; I want to try to process 4K/8K 10-bit video because I'm fairly sure my CPU and GPU can handle it, but something may be prohibiting it from doing so.
So far, 4K30 HDR, 4K60 SDR, and 8K30 SDR work perfectly fine (as well as all other lower options) rendering to both 4K60 and 1440p120 without any frame drops.
(In the case of a 60 FPS source, I forced the video to render via the setting that @MAG79 mentioned.)
If I try to process any higher quality video, it seems like the system doesn't even want to try.
The video caps off at a constant frame rate of 10 FPS; not a variable one of whatever it manages to render. That is what I find to be strange.
Even if it can't render the video properly, it should still be getting at least like, 30 FPS on 4K HDR (perhaps with frame drops), based on what I can already manage.
Is there any sort of setting in SVP or mpv that might be causing the video to cap off at 10 FPS?
Also, I tried pasting your setting into mpv.conf. It didn't seem to do anything. I also tried the vd setting that @MAG79 mentioned with NVIDIA CUVID VP9. Same deal.