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Controlling playbackVideo playback, import, and export ► Optimizing video performance

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If you intend to do a lot of seeking around or looping and editing while a video file is loaded, make sure that your video file has sufficient keyframes. Since each frame has to be computed from the last keyframe encountered, if you have very few keyframes in the video, performance may be slow. To change the number of keyframes, you may recompress the file using the File > Export > Video command and specify more frequent keyframes. Choose a suitable video compressor such as Cinepak and change the KeyFrame Rate parameter to a number between 1-5. A value of 1 makes every frame a keyframe, and higher numbers insert a keyframe after that many frames.
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