I have some 1-hour (~13GB) AVI (type 1) files. When I play them in Quicktime on my Mac (OS X) the audio is in sync at the start of the movie, but gets increasingly out of sync as it progresses. The exact same file played using Windows Media Player on my PC does not demonstrate any audio drift at all. I am very confused by this, given that the reason I'm using type 1 avi files is that they (unlike type 2 avi files) aren't supposed to have audio sync problem since they have the audio stored with the video frames. I can't see how things are getting out of sync. When I load the file into Premiere Pro CS3, the audio is synced fine (but I have to wait 10-15 minutes for the audio to first be conformed). I've tried playing the files on VLC, but it won't play them correctly. Basically, I just want to be able to preview my avi files on my Mac without having any sync problems. Quicktime can't seem to do that. Does anybody have a suggestion for an app that can, or have any idea how to get Quicktime to behave with large video files? Thanks!