I've used Vegas 4 to edit a 45 min mpeg video to put on DVD.

I render the video using the standard template for a widescreen video stream for Architect. I also encode the associated audio track to AC3 in Vegas. I then use Architect to prepare and write the DVD using these two streams.

However, watching the DVD, the audio and video slowly get out of sync; by the end of 45 mins it's about 1 sec out. Am I doing something wrong?

I've also tried exporting a combined video and audio stream to Architect and using it to convert the audio to AC3 but I still get the same problem. Any suggestions?

Thanks.