Distorted audio on .MOV files

[Timmo]

Hi all.

I'm getting very bad sound quality when playing back .mov files from podcasts. It's not the quality of the file, but iTunes is struggling to play them back. The audio is fine for about 2 seconds, then starts cracking, jumping, until basically iTunes crashes.

Playing audio only files (eg mp3, aac) is fine.

I've got the latest iTunes / quicktime installed / cleaned off / reinstalled.

I've tried safemode (waveout only) for audio
I've tried safemode (GDI only) for video. I've also enabling / disabled directdraw and acceleration settings via the quicktime preferences.

My video card (nvidia 660GT) drivers are up to date.

Any ideas?

Cheers, Tim