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bentwookie
Participant
July 28, 2020
Question

AE2020: How to keep attachment point within the center of the feature region?

  • July 28, 2020
  • 1 reply
  • 1015 views

I'm playing around with the motion tracker, trying to track two red blobs on some PVC. As AE steps through the motion, it seems determined to move the Attachment Point increasingly off center from the Feature Region. It gets to the point where the Attachment Point is so far removed from the center that the Feature Region really isn't over the part I care to track and the whole process fails. However, fixing the region causes the Attachment Point to be in the wrong spot.

 

Is there a way to move the region and attachment points independently or to prevent the drift of the attachment point within the feature region?

 

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1 reply

Mylenium
Mylenium
Legend
July 29, 2020

Your feature region is way too large. Constrain it to only the tip of the stick, not a million square miles of real estate around it. The drift happens because of this and using feature adaptation for every frame. If you realyl want to use such a large tracking region, you might at least want to turn that off (at the cost of more jumpy/ less smooth tracks, though).

 

Mylenium

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    bentwookieAuthor
    Participant
    July 29, 2020

    Thanks, that helped. I also put a white strip in the middle of the red to give it something more to grab onto. If anyone from Adobe is listening, a way to pick which channel (of RGB) you want to watch would seem to be helpful. Blender has that for its tracker (and why I went to red tape at first!).

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