I'm test driving TMPG DVD Author and decided to use a VHS DVD-R backup and insert some fresh animation clips from Flash MX (exported to AVI, encoded MPG-2 in TMPGEnc).

But I cannot insert the encoded Flash clips (MPG audio) in the same track with the DVD video (AC3) because clips & videos in the same track have to have the very same audio format (AC3).

The animations are credits and title boxes for the videos, so there's no sense to put them apart. Even when I encode the animations in TMPEnc as video stream (video only), DVD Author still won't take it.

I have to have the exact same format, bitrate, in a true AC3 file. How do I get that?