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Audio Drift!

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I'm having a problem where my video and audio are in synch in my editing software, but lose synch when I render. I ripped the video and audio from the DVD using DVD Decrypter, then threw them both into Vegas. My project is 24p, as is the VOB I ripped. I've tried rendering to DV, MPEG2, and with separate WAVs--all lose synch, slowly over time. Thanks in advance for the help!
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If it's a gradual drift then it's not a problem with an incorrect delay offset.

It's possible that your source MPEG-2 contains an irregular pattern of pulldown flags, instead of a constant 3:2 pulldown. You could try honouring the pulldown flags in the video stream; I'm not sure how this would be done in Vegas, but this would mean editing in 30i (29.97fps).

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There might be a problem because I'm editing the VOB directly. What if I used DGIndex to toss the VOB into Avisynth, ran an IVTC, then threw it into Vegas (via VFAPI)?
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Using DGIndex and AviSynth would be a good way to find out if RFF flags are causing the desync. Using the "Forced Film" field operation, and converting the audio to WAV, use this test script:

video = mpeg2source("blah.d2v")
audio = wavsource("blah.wav")
audiodub(video,audio)

If DGIndex reports 99% film I'd expect this script to play in sync in your media player. However, if it's only 75% or so, indicating your source is some kind of weird hybrid, then try it again with "Honor Pulldown" and this should fix it.

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Just out of curiosity, have you ever downloaded a codec pack? I did that once, and it really screwed up the audio of a video I was doing for Rikter. I could never keep the audio in sync for more than a few minutes. I ended up having to reinstall windows, and everything was fine after that.

<span class=“Italics”>MeBeJedi: Sadly, I believe the prequels are beyond repair.
<span class=“Bold”>JediRandy: They’re certainly beyond any repair you’re capable of making.</span></span>

<span class=“Italics”>MeBeJedi: You aren’t one of us.
<span class=“Bold”>Go-Mer-Tonic: I can’t say I find that very disappointing.</span></span>

<span class=“Italics”>JediRandy: I won’t suck as much as a fan edit.</span>