how are u previewing them? quicktime
uses wrong gamma. if you set vlc to openGl output, it will match premiere for rec.709. or you can get the slog2/3
-> rec 709 lut.
you didn’t try everything. wipe windows, don’t install avast. update Microsoft framework. update video drivers from NVidia, check gpu sniffer. then write back.
I do know bad things happen if you transcode half sampling down to 4:2:2 instead of 4:4:4. You’re losing half your chroma information in the transcode. you visually won’t see it, but your keying plugin will. https://cineform.com/444-vs-422
a few people on adobe.com have reported slightly faster exports when doing half and half image sequence renders. I don’t have exact percentage though. a long time ago render simultaneous frames worked in render farms but was tricky to set up the watch folders.