Hardware decoding into OpenGL on an AMD GPU on Windows

[leon-costa]

Hello,

I've made a program that uses libmpv to render high resolution video (up to 8k) into an OpenGL texture. It works fine on a system with an Nvidia GPU, both on Linux and Windows. But on a new Windows system with an AMD GPU (a Radeon RX 7700S), I cannot get good performance.

On this new system, the base player (mpv) only works well when hwdec is set to d3d11va. If I use dxva2 the performance is quite poor. Shouldn't dxva2 and d3d11va have similar performance?

I would gladly use d3d11va in my program, but it doesn't seem to be possible (the performance doesn't improve when I use it). I guess it's because there's no dxinterop GPU context. Is this feature fundamentally incompatible with d3d11va, or is it missing because no one has worked on it?

On the Nvidia system on Windows I use hwdec=dxva2 and gpu-context=dxinterop and it works fine.

The version of mpv I'm using on Windows is the one packaged in MSYS2.