QT Pro Sync Problem...

New Intel Mini dual-core, 1.66ghz, 1gig memory, latest everything updates. I'm capturing video via my DAC-100. When "recording" QT seems to work fine, but then usually by 10 minutes into a 30 min program, the video capture will "freeze" for a second or two (or 10, one time) and from then on the audio sync is out by that amount. Capturing video to iDVD seems to work just fine, making me think this isn't a DAC-100 problem, but a QT problem.
Any suggestions?

Well, my software is all up to date. And while I appreciate your suggestion about recording short sections and pasting them together, it's really not practical. Sometimes, the sync error happens in 5 or 6 minutes. Most of the reason I bought the dual-core Mini was exactly to archive and transfer video in QT (or H@^$) format. Like I said, imports to iMovie work fine. It's just the QT. Again, here's the symptom:
After reviewing 30 minute Video (Cable Hard disk recorder) transfer to QT via DAC-100, the audio and video start in sync. Then, at random intervals, the video freeze-frames for up to 9 seconds (but sometimes just for a few frames) letting the audio "slip" ahead by the same amount. Is there a QT "mode" where if it chokes on import, it just outputs the last good frame until it catches up?
Could this possibly be a DAC-100 problem that only manifests in QT but not in iMovie?
Help!

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--------------------------------------------------------------------------------
Final Cut Pro sound export for mastering.....sync problem
Hey,
I'm editing a 30 minute film and I have done most of the sound edit in FCP and Soundtrack pro and I want to now bring all the sound into pro tools to master the sound but every time i export sound into pro tools it seems to stretch by two or three seconds.
I have tried OMF, AIFF, XML, and Quicktime audio file sut to no avail!!!!
There are 50 tracks in the file so it is quiet large. It's not that there are handles of the file also as when I sync the file with the audio track with the video it syncs in one place but it is still out of sync in another.........It's as if the audio has been stretched!?!
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Try mixing down the audio first. Sequence/Render Only/Audio mixdown.
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RedKamel,
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Jim,
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Eagleray:
I capture through a ADVC-100.
I use to find the same problem playing VHS tapes with a standard VHS player from time to time and never solved it. The out of sync audio appears when capturing some specific tapes from specific sources:
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