Using my AMD RX 480, when I attempt to play
this sample file (2160p60, HEVC, 10b, 25 Mb/s) at 1440p using DXVA2 copy-back I get 100% GPU usage and it's nowhere near playable. Same for CPU decoding, even with 12 virtual cores. However, when I play it using DXVA2 native, I just get a black screen. The GPU is doing something since usage is around 50% and MadVR says frames are taking ~10 ms to render, but I can't see anything. Should I be able to play this file using DXVA2 native using this GPU?
I even tried turning everything in MadVR down to nearest neighbour but it made no difference to either the GPU usage or black screen.