• Adobe After Effects

  Motion Tracking Q

  Posted by Kayla Emter on October 2, 2008 at 2:19 am

  Is there a way to use motion tracker’s scale function to track a shot that’s dollying back from a stationary subject an in effect cancel out the dolly move to make a static shot and not get the Vertigo effect? I’m guessing not but figured I’d put it out there.

  David Bogie replied 17 years, 7 months ago 3 Members · 2 Replies
• 2 Replies

• 

  Alex Dinnin

  October 2, 2008 at 11:41 am

  The only way to do would be to affect the scale of your image.. as I undersand you correctly you want to track a camera pull back.

  so you could use an expression on the scale of the image but it would obviously pixelate !!

  apply the tracking scale data to a null..

  then on your image use a lin expression to re size it.

  hope this answers your question

  Alex
• 

  David Bogie

  October 2, 2008 at 4:00 pm

  The “Vertigo” effect you refer to was invented long before Hitchcock’s photographers used it. the idea is a matched zoom and dolly to maintain a relative image size, usualy the foreground subject, while the background image changes magnification. You can do this in AE using simple scaling or a very nice 3D move if the foreground and background are on separate layers.
  Not sure why you’d need to that using Motion Tracking, though.
  You may want to reverse-stabilize the shot so the background looks like it was shot at the same time.

  bogiesan

  This is my standard sigfile so do not take it personally: “For crying out loud, read the freakin’ manual.”

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