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Dorian Gray
Veteran Member
 
Join Date: May 2005
Location: Paris, France
 
2008-09-23, 19:18

In QuickTime Pro you could extract the audio (Command-J, select sound track, click "Extract") export as an AIFF (lossless), then drag and drop the AIFF into iTunes. Then convert the file to your standard iTunes import format (Control-click the track, select "Convert Selection to..." from the menu). Then delete the AIFF from your iTunes library.

That would of course involve re-encoding, which is lossy unless you use a lossless encoder in iTunes (in which case the file size would grow about 4x). Extracting is more difficult but can be done with other software. The details would depend on precisely what audio codec is used in the MP4 container and whether it's standards-compliant.

If you're stuck and the file is nothing personal, put it up on savefile.com (free, no registration) and I'll probably figure out a way to extract the audio without re-encoding (tomorrow; it's bedtime on this side of the pond).

… engrossed in such factional acts as dreaming different dreams.
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