ADOBE AFTER EFFECTS: Forum Expressions Tutorials Creative Cloud

How to track motion for position AND scaling

COW Forums : Adobe After Effects

<< PREVIOUS   •   FAQ   •   VIEW ALL   •   PRINT   •   NEXT >>
John HillHow to track motion for position AND scaling
by on Dec 20, 2015 at 12:22:41 am

I have an image of a tv with a green screen inside of it. The tv starts off small and increases in size. So I would like to track the scale and position of it as it increases in size. I'm starting with it at the end at its largest size because it's easier that way. However, when I place the two track points on either side of the tv as soon as I hit the analyze frame back button...the two trackers jump to the middle of the tv image. In other words, they don't stay where I'd placed them. And I don't get any useful tracking information. I'm sure this is a simple fix. And hope I don't have to go Mocha.
Thanks!


Return to posts index

Tero AhlforsRe: How to track motion for position AND scaling
by on Dec 20, 2015 at 8:58:13 am

[John Hill] "the two trackers jump to the middle of the tv image."

You have selected bad tracking points then. You should pick corners or something else that has good contrast.

[John Hill] "And hope I don't have to go Mocha."

Mocha is made for planar tracking and might be a better choice here than a point tracker.


Return to posts index

John HillRe: How to track motion for position AND scaling
by on Dec 20, 2015 at 4:39:13 pm

Thank you, Tero, for your help...I see now that tracking in AE is not for wimps.


Return to posts index


John CuevasRe: How to track motion for position AND scaling
by on Dec 20, 2015 at 5:26:35 pm

Mocha might not be a bad idea, because it allows you to export your data to the corner pin effect, which would be ideal if you are placing an image into a television. You might want to check out,
Mocha Corner Pin Tutorial


Johnny Cuevas, Editor
ThinkCK

"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.


Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2017 CreativeCOW.net All Rights Reserved
[TOP]