Hi, I've setup a project that contains approximately 30-40 video clips(on roughly 5 track) + around 5 audio tracks. My problem is this, when i look at this project in vegas 4 it all runs smoothly and the preview runs very nice and it looks really good AND it's all synch'd to the music/sounds. But after i render my project the sound matches at the start of the movie but as the movie progresses the sound and the video slowly start pulling apart from one another, so at approximately 2 minutes there's a 1/2 second loss, at 4 minutes there's a 1.2 second loss and at about 8 minutes there's a 2.5 second loss. (this is the audio is herd 2.5 seconds before the video).

I use divx codec 5.05 to render my project to a descent file size.

any help will be greatly appreciated.
Thank You.