On Sun, 11 Jul 2021, RVP wrote:
GPU-acceleration does not necessarily imply HW-assisted video decoding. This latter depends heavily on the decoding capabilities of one's CPU and the video being played. Some CPUs don't do H.265.
I forgot to mention this: it also depends on the decoding library used. For H.265, you get much better performance if you tell mpv to use libdav1d instead of libaom (which is what it prefers--but I believe nia@ has already made this switch in pkgsrc...). -RVP
