MPG is a muxed file (audio and video merged into 1 file)
You need to separate them or wrap them up in a quicktime file.
Better still export the MPG files as M2V & AIFF (or AC3) ready to import into DVD Studio unless you need to edit them first in which case just export quicktime files in the format you are editing in.
Use MPEG Streamclip to do this its a free app from: [
www.squared5.com]
Regards
Ben
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