Use VDP_YCBCR_FORMAT_NV12 as the correct VdpYCbCrFormat
Use VDP_YCBCR_FORMAT_NV12 as the correct VdpYCbCrFormat

By a happy coincidence, VDP_CHROMA_TYPE_420 and
VDP_YCBCR_FORMAT_NV12 both represent the same enumeration
value of zero. However, semantically, VDP_YCBCR_FORMAT_NV12
is correct in this situation.

NVIDIA/vdpau-hevc-example