[X4U] QuickTime export of MPG movie

[Spoolman Nancy]

A friend recently bought a Sony Cybershot P200 digital camera. She  
went on vacation, took many stills and mpg movie clips. Now she wants  
to put them into iMovie. Unfortunately, the movies have no sound when  
imported into iMovie. You cannot export it and have audio, too. Does  
anyone have any idea why the audio is encrypted so we cannot extract  
the audio along with the video? I have a clip here and I've tried  
everything. She also has QuickTime Pro 7, so that's not the issue.  
It's almost as if the mpg buries the audio and nothing on the Mac  
side is able to extract it.

Thanks for any information you can give me.

Nanc