Playback stutters on MacBook Pro, not on another computer

November 30 0
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Hi,
I have a strange problem with QT's exported from QT player PRO. The base file is a 1280x720 HD QT in Apple ProRes which I exported in H264 640x360. When I playback the exported movie it stutters (jumps back and forth rappidly). No, it's not a fieldorder issue, because the original file is progressive. It's actually a cool effect, but very unwanted The strange thing is when I copy the same file to another Mac it plays back fine. Any clues?
Tijs
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Sorry, some extra info: I use QT Pro 7.6 and already tried to re-instal.
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