I wanted to pass along my experiences with audio sync issues in hopes it will help someone else. For the last month I have been fighting issues with Ratatoulille, Brother Bear, Toy Story2, and Incredibles. For about 30 movies I converted the "Main Movie" to the HDD. I then tried to use generic xvid/mp3 2000/128 kbs to convert to xvid. This has worked for about 25 movies, but I consistently received audio sync problems for the mentioned Disney movies. The audio was in sync at the beginning of the movie, but 1.5 seconds off by the end.

I incorrectly assumed that the problem was during the xvid encoding since I could play the movie from the iso without any issues.

I tried the following (on both Brother Bear and Incredibles):
- 4.1.2.0 / DVD -> HDD / Main Movie / DVD9 ==> h.264 + mp3 => audio sync issues
- 4.1.2.0 / DVD -> HDD / Main Movie / DVD9 ==> xvid/mp3 / + 2000/64 kbs => audio sync issues
- 4.1.2.0 / DVD -> HDD / Main Movie / DVD9 ==> xvid/audiocopy + 2000/64 kbs => audio sync issues
- 4.1.2.0 / DVD -> HDD / Main Movie / DVD9 ==> h.264/aac / 2000/64 kbs => audio sync issues

I also tried using mkv vs avi. I also tried 1 pass vs 2 pass. Then I repeated almost everything using 5.0.0.0 beta. I tried pointing to the iso directly from DVDFab. I also used daemon tools to mount the iso as f:/ and pointed DVDFab to that virtual dvd drive. In every case the audio sync issue occurred.

Thanks to the posts from FishTunes, I decided to try going straight from the original DVD to xvid. Whahoooo! No audio sync issues.

I have also experienced several movies that would hang when trying to go from a "Main Movie" iso to xvid. Hopefully, the direct conversion will fix that issue as well.