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Create a moving mask from a color channel?

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Jov OejlCreate a moving mask from a color channel?
by on Jul 15, 2012 at 12:03:52 pm

In Photoshop I always pull the gray scale image from a specific color channel and use it as a layer mask.

Is it possible to do the same with a video in After Effects?

I want the mask to be a black-and-white version of the video, and it has to move as the video.

Thanks!


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Walter SoykaRe: Create a moving mask from a color channel?
by on Jul 15, 2012 at 6:32:00 pm

See the set of Channel effects [link] -- particularly Channel Combiner, Set Channels, or Shift Channels.

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
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