First time audio sync issue

[tarrickb]

For some reason, even though I've been doing the same process before with success, my audio has now decided to get out-of-sync with my video. Here's what I'm doing.

1. Capuring DV with Sony Vegas (SYNC OK)
2. Importing the clip into Adobe Audition, normalizing the audio to 95% and resaving to .wav
3. Replacing the old .wav file with the newly saved one from adobe audition and re-encoding the file with sony vegas to DV-NTSC (AUDIO SYNC OK)
4. Import DV file to Vdub, applying smart de-interlace filter, compressing audio using LAME to 130kbs ABR and compressing video to XviD (two-pass at 1200 kbps).

Now, the final XviD video is NOT in sync with audio. I've opened with different media players and burned video to disc and played back with no luck. It also seems to be a contant out of sync issue, not getting progressively worse (so it seems).
Any advice???

EDIT - Just tried encoding without the de-interlace filter and have the same problem.

[mikiem]

I think I'd cut the new clip, so only had a short version with the beginning of the vid. Then with the clip in V/Dub do a direct stream copy, & use the audio delay, at the same time checking the interleave time interval (not frame). Once you've got a good delay figure, load the full vid & use that same delay.

[tarrickb]

Thanks for the response. That sounds like a good solution for sure.
I however found the culprit and it was LAMES ABR encoding. When I use CBR everything is fine.
Thanks again, and i hope someone can learn from this.