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  • Posted by John Flynn on April 27, 2005 at 1:21 am

    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 replied 18 years, 10 months ago 2 Members · 4 Replies
  • 4 Replies
  • John Flynn

    April 27, 2005 at 1:57 am

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

  • Filip Vandueren

    April 27, 2005 at 4:12 am

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



    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 is the scale


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

    April 27, 2005 at 5:49 pm

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

  • John Flynn

    April 27, 2005 at 5:50 pm

    I mean too.

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