Hi @BlueprintBen ,
I’ve managed to produce 8-bits per channel 444 video with DirectX and NVENC by using the AYUV format (it is a packed format) but there’s a caveat: https://forums.developer.nvidia.com/t/unexpected-color-space-conversion-with-h-264-ayuv-format-444-yuv/197901
It looks like 10-bit 444 is not possible with DirectX.