How do I "stitch" an audio track to a video track?

[Cobber]

OS X 10.1.5
QT 6 preview

I have some Divx .avi files with AC3 sound and want to burn them to VCD.

So, I used DivX Doctor II to extract the ".ac3" sound file and then mAC3dec 1.5.1 to turn that into a .aiff file.

After getting the latest codecs, I can SEE the video in Quicktime but not hear the AC3 (why I did this).

OK, so now I have a working video and audio file. . . how do I "stitch" them together into a .mpg or .mov that Toast will burn to a VCD?[/b]

[tgpo]

http://www.vcdhelp.com/forum/viewtopic.php?t=83368

Start on step four.