Actually, it happens before compression.
When I open Compressor and load the sequence, I can preview it, even before I make any compression choices. The combing doesn’t appear in the FCP Viewer window, but it does appear in the Compressor Preview window. I’ve fiddled with the Field Dominance settings (it’s DV NTSC, so it’s lower field dominant), and they’re set correctly. Even so, I get awful results.
My current plan has been to export the sequence in a high res compression scheme, then recompress it to MPEG-2 for DVD. Curiously enough, h264 and Animation codecs (through FCP) both have the same problem, but exporting via DV NTSC 48khz Anamorphic (the same compression scheme it came in!) works fine. Hopefully when I use this new movie, it will eliminate the field problem.
However, this doesn’t explain what was actually happening. I’ve fiddled with field dominance in the sequence and the compression scheme, neither have had any effect. Any other ideas?
Matt