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Macbook issue playing videos

Oct 16, 2011
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okay so the problem is that every time i try to play and mp4 video on quicktime it looks white and it ruins the video and when i play it on itunes i looks good, quicktime only plays avi videos good for me, i dont know what the problem might b and ive had this problem ever since i got my computer, and so i am tired of this, im tired of converting the **** videos, i need this fixed, if anyone out there could help me, it would b awesome.

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