Nvidia hw HEVC support

apt install vdpauinfo
 # X must be running
vdpauinfo | grep HEVC # or
vdpauinfo --display :10 | grep HEVC

for 1060 GTX could return

HEVC_MAIN                      153 262144  8192  8192
HEVC_MAIN_10                   --- not supported ---
HEVC_MAIN_STILL                --- not supported ---
HEVC_MAIN_12                   --- not supported ---
HEVC_MAIN_444                  --- not supported ---

which would mean no 10bit 4:2:2 HEVC I guess. edit: Or perhaps vdpau doesn’t support 10bit.

edit2: About mpv: On linux (nvidia) one would generally want nvdec-copy and with intel/amd vaapi-copy (JEEB).