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Motion Tracker to Brush Path
Hi,
im new to expressions. I’ve got a motion tracker, following some information in the movie and want to draw a line, that follows the tracker all the time. Begin should be the first feature center, end the actual feature center. Is there any way to do it?
motionTracker("Tracker 1")("Track Point 1").featureCenter[0]
gives me an error, wanting a Property instead of an array.Thanks in advance
mnl
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3 Replies
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Here’s a way to do it:
i) Track your footage and apply it to a Null.
ii) Use the Write-on effect and use the pickwhip to link the Brush Position to the Null’s position. Job done.In fact, you could not bother with an expression if you didn’t need to. Just copy and paste the keyframes from the Motion Tracker (or Null) to the Brush Position.
HTH,
BenCurious Turtle Professional Video
Training | Editing |Supporthttp://www.curiousturtle.com
Need help with your planar tracking?: Rock Steady : Successful Motion Tracking in Mocha & After Effects & Tracked : The Art of Motion Tracking in Mocha for FCP -
that worked out very good. Just the performance is far behind the workflow i was hoping for (20 min of video).
thanx -
I’m looking to do a similar thing in a video, however I don’t know how to apply my motion tracking to a null object. I also don’t even know where to find the write-on and pickwhip.
FYI this is the first time I’ve ever really used AE.
This is the effect I’m trying to create:
https://www.youtube.com/watch?v=UiezugBMHiU
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