[Rafael Amador] “Animation is by now a legacy codec. Use Prores444 instead.”
If you need to keep things in RGB with alpha. ProRes4444 can get quite big, but the problems that Animation codec present to the Y’CbCr FCP preview are bigger.
Try using Compressor to render out the finals, rather than from the Timeline or FCP Conversion options. The rules change once you leave Final Cut, and I have found transitions to come out much cleaner.
I’d also be interested if “Square” was chosen rather than custom AR. You might have to change the aspect ratio on most of the footage, but that is something I work through all the time when flowing anamorphic (1440×1080) media through color correction.
jPo
“I always pass on free advice — its never of any use to me” Oscar Wilde.