Motion tracking and masking in After Effects.
by Chris Clute
on
May 11, 2008 at 6:33:33 pm
For some reason my project keeps getting thrown into the upper left corner of my enlarged comp. after reverse stabilization. What's weird is that I've successfully done it before without it shrinking the footage. I'm using the method as in the (demon face warp demo)
Re: Motion tracking and masking in After Effects. by Dave LaRonde on May 12, 2008 at 2:58:25 pm
AE BASIC FACT: The 0,0 point in AE is the extreme upper-left corner, whether you're working with footage or a comp.
It's an important thing to remember.
If you motion track a piece of footage, it uses the coordinates of the footage. If you then place the footage into a much larger comp, it will always go to the upper left hand corner, because the coordinate numbers of the footage are smaller than the cooresponding coordinate numbers of the comp.
To easily center the footage in the new comp, place a null object at the center point of the footage, parent the footage to the null, and move the null to the center point of the comp.
Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA
