.mpg to .mov conversion using QT. no audio!

i noticed that .mpg videos played from itunes stutter a lot and the play back is not smooth. whereas the .mov ones play fine. so i decided to convert my .mpg video collection to .mov. but, while .mpg videos have proper audio, the converted ones dont have any audio at all. i used QT 7.5.5 PRO to convert them using the default MOV settings. any help?
Neerav

QuickTime Pro will lose the audio when converting MPEG files. Use MPEG Streamclip
<http://www.squared5.com>

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