Tracking Dots

[John Flynn]

I’m tracking footage using dots manually placed on an object. The dots were placed too far inside of the area needing to be covered, though. Is there a better way to fix this than moving the corner points over frame by frame to compensate? (Scaling the footage throws off the tracking).

[John Flynn]

I found an expression that I think works that I will try. Suggestions are still welcome if you feel like it.

[Filip Vandueren]

If you’re using Corner Pin with those dots here’s a project with some scripts:

scalepin.aep

Recipe:

1. On the layer “Corner Pinned Footage” there’s a Point Control, a Slider Control, and the Corner Pin-effect with some keyframes
2. copy the Point control and it’s expression to your Corner-Pinned layer
3. Convert it’s expression to keyframes !
4. copy the “scaler” Slider Control leave it set to 1.00 for now.
5. now apply this expression to each of the corner-pins:
   c=effect("Point Control").param("Point");
   // c is the scaling-center
   s=effect("scaler").param("Slider");
   // s is the scale

   c+(value-c)*s

6. Now you can scale the cornerpin using the scaler-slider

[John Flynn]

I actually got it done already. I found an expression on aenhacers.com that works perfect. Gave me a slider to control the scaling, like your script. It was simple to.

[John Flynn]

I mean too.