Movie stutters?

I have a quicktime movie which was made with a Sony EX1. The file is 1GB.
I have a problem playing the movie. It opens fine but the at same point it stutters and although the audio continues it stops and jumps on and the finishes fine. This only happens if I play it full screen. If I play it half size it works fine? My Mac is a Macbook Pro MAC OS 10.7.5, 2.53 GHz Intel Core i5.I just maxed out the memory to 8GB, 1067MHz DDR3.
The movie info is as follows.
Dimensions 1440x1080, Linear PMC, Apple intermediate Codec, Duration-01.34. Audio channels-2, bit rate 84,954.
I have opened it in QT 7.
My QT is 7.6.6 (1709)
Version 7.7.1 (2339)
Anyone have any advice or thoughts?
Thanks
Dave

Anyone have any advice or thoughts?
If this is an AIC/PCM file approximately 1 GB in size for a 1.34 sec duration, then it would imply your combined (audio + video) data rate is on the order of 746 Mbps. If so, my guess would be that the conversion was made with the video quality slider maxed out causing a runaway video data rate. Try a conversion with with a more realistic quality setting in 50% to 80% range.

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To understand the relationship of fps vs motion blur vs velocity, watch this interactive website

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http://frames-per-second.appspot.com
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pros will yawn, but for us hobbyists it should create a sort of internal Heureka!

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… (Peter) Jackson should have viewed this website before filming the hobbit @ 48fps
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...Now render before exporting to QT, I suppose?
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