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Expression to make clip play 2 frames forward and one frame back
I have posted this elsewhere, but didn’t realise there was a specific expressions section to this forum. Hope this is okay.
Anyway, I know the final effect would be a bit jarring, but I am wanting to control a clip so that it will play 2 frames, jump back one frame then play 2 more and so on…
Can this be done? Any help would be appreciated!
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3 Replies
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Wouldn’t that make your frame sequence 0,1,1,2,2,3,3,4…? If so, then except for the first frame it would just be play every frame twice in a row, is that correct?
Dan
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No, I think I have explained it wrong. The sequence would be 1,2,1,2,3,2,3,4,3,4,5,4,5,6,5 and so on.
When watching in QuickTime if you go frame by frame you’d press the arrow keys like this -> -> <- -> -> <- -> -> <- etc…
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I think this time remapping expression will do it:
f = timeToFrames(time) + 1;
framesToTime(Math.floor(f/3) + f%3 -1)Dan
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