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Apply Tracking Data to Masks?
Hey, folks. I have some tracking points on a green screen that I need to mask out (stupid color choice), but the camera is hand-held and moving throughout the piece.
Is there a way to mask out each point, track the motion, and apply that data to my masks so they follow the tracking points? Then I would just need to adjust for when the actors cross in front. It would make my life a lot easier…
As always, thanks for ANY help!
– Dan
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7 Replies
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You can apply the tracking data to a solid-color layer with your masks applied and use that layer as a track matte.
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Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
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If a page of After Effects Help answers your question, please consider rating it. If you have a tip, technique, or link to share—or if there is something that you’d like to see added or improved—please leave a comment. -
Or you could clone out the tracking points.
Motion Design, Color, Editing
Simulated Wood Grain Cabinet Inc.
Bunim-Murray Productions -
Check aescripts.com/tracker2mask. It seems like this script would do what you’re looking for. Or check out aescripts.com/maskstolayers. It seems like this would move a mask to a layer (as a normal solid, I suppose?) and you could then parent that layer to a null that has the tracking data. This layer could then be used as a track matte to mask out your tracking points.
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I believe the method that Todd stated is pretty much the standard; and deservedly so for its simplicity and effectiveness, the others involving unnecessary steps. No nulls or expressions needed.
A null would come in handy if you needed to match motion to a layer offset from the position of the tracker, and an expression would be the ticket if you wanted to give it some drag, gravity, random wiggle or whatnot.
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Thanks, gentlemen. This forum is always a great help!
Todd, can you take more through your suggestion in a bit more detail? This involves the TrkMat menu I assume?
– Dan
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> Todd, can you take more through your suggestion in a bit more detail? This involves the TrkMat menu I assume?
More information on track mattes in general and on rotoscoping (which this is a kind of):
“Track mattes and traveling mattes”
“Rotoscoping introduction and resources”
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Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
———————————————————————————————————
If a page of After Effects Help answers your question, please consider rating it. If you have a tip, technique, or link to share—or if there is something that you’d like to see added or improved—please leave a comment. -
Seems simple enough. Thanks again for the help!
– Dan
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