Jerky Preview/Playback
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Jerky video playback in the Preview monitor is usually caused by a under-performing computer CPU. Apart from DV-AVI, which requires very little processing power, most video codecs are requiring increasing CPU power to process. In the case of HDV MPEG 2, a dual core system equivalent to 2.5ghz is necessary to get smooth playback. AVCHD requires an even faster CPU. Playback smoothness will also depend on the effects applied to the object/clip. Effects, depending on their nature, require extra performance to process and may result in jerky playback when the original clip played smoothly.

There are a some things that can be done to improve playback performance: