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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, 1 month 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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