• Adobe After Effects

  Mocha screen replacement with foreground moving object

  Posted by Alek Ivanov on July 1, 2015 at 1:00 am

  Hello,
  I would really appreciate if someone will help me with a solution to my tracking problem.
  I have a pull out shot with an ipad screen I have to replace. The guy’s arm is moving over the screen area and the track is picking up the movement even when I have tracked the arm and placed track layer on top.

  https://alec.mindrust.org/mocha/pic1.png

  Alek Ivanov replied 11 years, 2 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Ken Teutsch

  July 1, 2015 at 2:44 pm

  You will need to create a holdout matte over the object blocking the plane you are trying to track. Then mocha will know what to track and what to ignore.

  You might start with this: https://www.imagineersystems.com/videos/tutorial-tracking-dealing-with-foreground-obstructions
• 

  Alek Ivanov

  July 1, 2015 at 3:06 pm

  Ken thanks for the reply, but this is exactly what I did – tracked the arm and placed the arm track layer on top. The screen track on the bottom still picks up the arm movement above. May be something about the settings?

  here is a link to 2 screenshots of my mocha file
  https://alec.mindrust.org/mocha/track1.jpg

Reply to this Discussion! Login or Sign Up