loopOut is not a function

[Irina5F96]

When I use expression loopOut() I always see error "loopOut() is not a function". I tried to use different variants of syntaxes but it didn't help.

I saw some advices here but they didn't work too.

I use Mac OS Big Sur 11 and 17.6.0 After Effects

[Dan Ebberts]

loopOut() doesn't work for paths. Try this workaround:

if (numKeys > 1 && time > key(numKeys).time){
  t1 = key(1).time;
  t2 = key(numKeys).time;
  span = t2 - t1;
  delta = time - t2;
  t = delta%span;
  valueAtTime(t1 + t);
}else
  value

[Guest]

It works flawlessly 😄

[Johannes_Seifriedt]

This works perfect. Even for eased keyframes 😄

[Eric??]

Prefect

[Rick Gerard]

The loopOut() function works on properties that have a numeric value. The values can be in an array. Vector paths require a different approach.

The approach is to look at the number of keyframes and then use valueAtTime(). 

For a simple seamless loop, the first and last keyframes must be identical so copy the first keyframe and paste it at the end. This is the simplest approach to that problem:

valueAtTime(time % key(numKeys).time)

Edit: Just saw Dan's solution. It's a lot more typing and it has the advantage of not throwing an error if there is only one keyframe.

[Blake612]

Any chance there's a way to trick things into working like loopOut("pingpong")? 🙂

[Dan Ebberts]

That would be like this:

if (numKeys > 1 && time > key(numKeys).time){
  t1 = key(1).time;
  t2 = key(numKeys).time;
  span = t2 - t1;
  delta = time - t2;
  seg = Math.floor(delta/span);
  t = delta%span;
  valueAtTime((seg%2) ? (t1 + t) : (t2 - t));
}else
  value

[Airu24321326m5x9]

Hi,

I am wondering how do I target this only on specific keyframe(s), like how the in and out under loop function and numKeyframes are doing? Thanks!

Really apprciate your contribution of that code

[Cidietrich_ · Accepted solution]

I Had the same problem today and I realised you have to use de entire expression not just "LoopOut("offset")" like some tutorials tells us to do. You Have to use like this:

loopOutDuration(type = "offset", duration = 0)