This posting is a year old, but somebody may still benefit from this so I’m posting my findings on this issue. I’ve noticed, that when I set my user preferences to “Make New Clip”, occasionally it will break up the clips with A/V 16 frames off sync. It’s consistently 16 frames each time. It’s also not a playback issue within FCP, since I checked the quicktime files. If I make the clip offline and recapture, it comes in fine and in sync.
The sync does not drift; it’s consistently 16 frames off. Also, it’s not due to full drives since I’m capturing to a near empty 5 TB, 5 way stripe and capturing DVCPRO HD. Not a very bandwidth-intensive codec. I haven’t found a pattern to it either, it seems fairly random.
The only suggestion I have, is if you’re using this method to capture your footage, make sure you double check the sync on each clip. Since recapturing a clip here and there, while annoying, isn’t a huge a deal, but giving your editor an out of sync clip is a big deal.
Richard Sanchez
North Hollywood, CA
“We are the facilitators of our own creative evolution.” – Bill Hicks