I have an 8-core Mac with a 4TB CalDigit raid, and an AJA Io HD box. Everything is shot in HDV (sadly) and it is transcoded to ProRes. We do documentaries.
When I switch from one project to the next and i Set the Easy Setup to:
AJA IOHJD- 1080i 29.97 Apple ProRes 422 and the Sequence Settings to same, and I check the Video Playback for the same – I have learned that even though everything is set for AJA IOHJD- 1080i 29.97 Apple ProRes 422 , that in the Audio?Video Settings > Capture Preset Editor > INPUT (only): The input changes to 720p. I don't know why. I have never used 720p and I've set everything that I know about to 1080i. This goofs up a lot of different things above and beyond the capture process. Now, I simply check this every time I begin a new days editing or i start a new project. (If I remember.)
I had also shut everything down and restarted and I know that this often fixes things, but I think it was the 720p.