• Adobe After Effects Expressions

  Use a slider to change a certain keyframe’s value

  Posted by Matias Andersen on January 23, 2018 at 7:08 pm

  I’m trying to do some simple position animation with keyframes, but I want to be able to change the 2nd keyframe’s X & Y values with a slider.
  I haven’t been able to find an expression that does that, and I have little to no skills in coding, I only know the basics.

  Just to clarify, I only want the 2nd keyframe’s values to change, I don’t want the expression to change the position of the layer itself, since I still want the keyframe animation.

  I found an expression here which kind of does what I need, exept that it doesn’t keep the keyframe’s animation.

  valueControl = thisComp.layer("Adjustment Layer 2").effect("Slider Control")("Slider")
valueKey = 2

  n = 0;
  if (numKeys > 0) {
  n = nearestKey(time).index;
  if (key(n).time > time) n--;
  };

  if(n==valueKey){
value-valueControl} else value;

  Matias Andersen replied 8 years, 6 months ago 1 Member · 0 Replies
• 0 Replies

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