Sat Jun 02, 2018 11:08 pm
Pro Recorder simply doesn't support 4:2:2 recording.
It's designed to create "preview" h264 files, which are in 95% 4:2:0 as this is enough for highly compressed files.
4:2:2 vs. 4:2:0 makes much bigger difference for interlaced content. For progressive there is no that big difference in real world, but your master files should ideally be at least 4:2:2 (when you do keying or heavy VFX work then you ideally need 4:4:4).
4:2:0 is for end consumer delivery, like web, etc.