Why doesn't QT with MPEG2 play audio from iDVD VOBs

I'm trying to re-edit a friend's DVD so I only have the VOB files (created from a PC). I read I need the MPEG2 component for QT so off I go and buy it. Waste of time because ... it doesn't pick up the audio. So I download MPEG Streamclip (excellent product which does convert VOBs to DV etc /with/ audio). Then I read the fine print that the QT MPEG2 component doesn't handle all audio encodings. So just out of curiosity I read in a VOB created by iDVD in QT - again, no audio. So just what audio encoding does iDVD use - just curious ...
PowerMac G5 Dual 2.7GHz 4 MB 800 MB Mac OS X (10.4.6) PowerBook G4

and yes, MPEG Clipstream worked fine, I exported the VOB as DV files, and I'm now editing away in iMovie. I guess I didn't need the QT MPEG-2 after all.
If you meant MPEG Streamclip, then you DID need the AppleMPEG2 Playback component. MPEG Streamclip will not convert MPEG2 files without it!
from http://www.squared5.com/svideo/mpeg-streamclip-mac.html
REQUIREMENTS
For MPEG-2 playback and conversion, you need the QuickTime MPEG-2 Playback Component. You can buy it from Apple (www.apple.com/quicktime/mpeg2).
Aslo regarding the Apple MPEG2 Playback component. From http://www.apple.com/quicktime/mpeg2/faq.html
What audio formats does the QuickTime MPEG-2 Playback Component support?
The QuickTime MPEG-2 Playback Component supports the playback of MPEG-2 files (.mpg, .mpeg, .vob, .vro, .m2v, .m2a, and .m2s) that contain MPEG audio layers I or II. The MPEG-2 Playback Component does not support audio playback for MPEG-2 files containing PCM, DTS or AC3 audio.
iDVD uses PCM audio if I'm not mistaken......funny huh?

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Attachments:
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Why doesn't QT with MPEG2 play audio from iDVD VOBs

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