I am trying to digitize miniDV footage shot in 1999. I digitized it using the Easy Set Up Format: DV/Panasonic DVCPRO Rate:24:00fps Use: Cinema Tools--24fps from DV NTSC. The first few shots appear to be in sync, but the sync gets lost as the tape goes on. I assumed the footage was shot at 24 fps. Is there a better format, use and/or rate selection I should use?