• Adobe After Effects Expressions

  Frame by frame effect

  Posted by Giorgio Terzo on February 25, 2019 at 12:48 am

  Dear all,

  I am trying to reproduce this effect (https://www.facebook.com/clive.hicksjenkins/videos/10156370564303198/) in an animation trying to manipulate the position and skipping some frame with the following expression (thanks to Dan Ebberts!):

  // Skipping frame
n = 2; // skip every nth frame

  frameToSkip = 0; // 0,1,2 ...n-1
currFrame = Math.round(time/thisComp.frameDuration);
currFrame += Math.floor((currFrame - frameToSkip)/(n-1)) + 1;
framesToTime(currFrame);

  //change the update of the position
rate = 5;
//add some randomenss
prob = 50;
if(random(0, 100) < prob) {
rate = rate + random(0.05);
}
t = framesToTime(Math.floor(timeToFrames()/rate)*rate);
valueAtTime(t);

  The problem is that I have to apply the second expression in each moving elements and sometimes the animation is “not really controllable”.
  Does exist a better a method (or maybe a plugin) in order to achieve this kind of effects? A sort of master effect that can be applied for all animation?

  Thanks!
  Giuliano

  Giorgio Terzo replied 7 years, 5 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  February 25, 2019 at 2:05 am

  Precompose and then control time remapping, maybe? Or did you want the animation timings to be independent of each other?
  Dan
• 

  Giorgio Terzo

  February 25, 2019 at 10:53 am

  Hello Dan! Thanks for your answer. As far as I could see until now, the best way to go (I think) is to have independent animation timing between the elements.
  When I tried to control only the time remapping, the stuttering in the animation become too “regular”.

  For this reason, I tried to apply different expression for the position in order to add some instability … But of course, it starts to become pretty uncontrollable right now ☺

  I am thinking if exist any technique/method in order to control the time remapping in combination with the update rate of the position for each part.

  Sorry for my explanation, I hope that makes sense ☺

  Best,
  G

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