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Slow Mo with Optical flow?

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Greg BallSlow Mo with Optical flow?
by on May 15, 2014 at 10:57:48 pm

We shot a 2X4 hitting a window. We shot this at 1280X720 60P. I want this to look vey cool in slo mo 29.97. When I put this clip in Motion 4, the wood seems to warm, and the glass sems to also warp at it shatters. Is there anything I can do about this? Would Twixtor be much better? I hate to buy Twixtor for $379 for one 3 second shot. Any advice?

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Mark SpencerRe: Slow Mo with Optical flow?
by on May 15, 2014 at 10:59:48 pm

Twixtor would probably have the same issues. When you have moving objects overlapping each other, it's impossible for the software to distinguish them from each other, leading to the warping you see. Optical flow is really not the best approach for this kind of slow motion. Better to rent a camera capable of higher frame rates.

Mark Spencer
Freelance Producer/Editor/Motion Graphics Artist
Apple-certified Master Trainer
Author, Motion 4 from Peachpit Press

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Stephen SmithRe: Slow Mo with Optical flow?
by on May 16, 2014 at 1:27:14 am

I agree with Mark. I use both Twixtor and Optical Flow and they have very similar results. However you are in luck, Twixtor offers a demo version where an X appears over the footage so you can see for yourself if it will work out for you:

Stephen Smith

Utah Video Productions

Check out my Vimeo page

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