I have some old cartoons that are in mpg format. When I watch them on my computer - they are perfect. The quality of the video is not bad - and the audio is fine. When I open them in virtualdub - I get several errors either in reference to the audio or video - however - I scroll through the video in virtual dub - and there is no "visual problem" that I can pick out. I am using Ulead DVD movie Factory as my authoring program (I find it the best to use - for my purposes). I import my mpgs, set up all my menues - get everythign the way I want it to be. It burns fine. Then when I go to play it - every single video is out of sync. They all start off perfect - but as time goes on - they get more and more out of sync. Each cartoon is about 22 minutes long. It appears around the 15-18 minute mark - they slolwy start getting off time from each other. By the end - there is about a 2 - 3 second delay between the audio and video. Is there a program I can use to tell me what the problem is? I tried concerting the mpgs to Divx (5.05) to see if there was a difference. The only difference was - that the AVI files I created were twice the size of the MPG - and the audio was still out of sync. Any suggestions would be greatly appreciated. Thanks.