use file->project settings -color depth 32 bits/channel, working space, one of the RGB’s, adobe or apple, then use a YUV codec that doesn’t change color space from 4:2:2 to anything else. Some YUV’s go yuv12 yuvu, etc and bits get flipped around and color lost from RGB to YUV and back again.
—10-Bit 4:2:2 codec that we use in Final Cut but it is not listed in AE?
Oh yea? go video for windows-10 bit, YUV 4:2:2 YUV
unless your strapped for size, RGB uncompressed output 4:4:4 will guarantee no generation loss.