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How to create a velocity mask?

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Manuel Voss
How to create a velocity mask?
on Nov 5, 2012 at 3:50:54 pm

I mostly think I know what I'm doing when working with after fx, but actually I'm kinda stucked. Hope someone can help me.

I want to apply a filter to a video. But its intensity should be based on the velocity of the pixel. How to get a velocity mask?

There must be a way to achieve this - maybe by getting some information from the CC Force Motion Blur? Any ideas?


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Darby Edelen
Re: How to create a velocity mask?
on Nov 5, 2012 at 4:00:21 pm

The only product I've ever seen that will expose motion vectors in AE is Twixtor:

http://www.revisionfx.com/products/twixtor/features/#ae_compatible_4

The vectors may not be detailed enough for your purpose though. A trial run might be in order :-)

I've used this plug in the past to generate some pretty cool particle fields that react to motion in live footage.

Darby Edelen


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Manuel Voss
Re: How to create a velocity mask?
on Nov 5, 2012 at 4:06:34 pm

Good thinking... didn't actually realize, that twixtor does motion detection for the retiming.

I will give it a try. Thanks!


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