Scripting: how to access all the keyframes of a given property?

[Dan Ebberts]

What needs to be in the list?

Dan

[Paulo Jan]

The basics, time and value. (I realize now that this is a more complicated issue than I had first thought, since a keyframe can also have a lot of other attributes: hold or not, interpolation… but the ones I need in my case are just those).

[Dan Ebberts]

I suspect what you want may be more complicated than this (file I/O maybe?) but something like this example would construct a string containing a list of key times and values:


var myProp = app.project.activeItem.layer(1).property("Position");
var str = "";
for (var i = 1; i <= myProp.numKeys; i++){
str += (i == 1 ? "" : "\r") + myProp.keyTime(i) + " " + myProp.keyValue(i).toString();
}
alert(str);


Dan

[Paulo Jan]

Wow, thanks. Actually, I was just wondering how to access the keyframes at all; I didn’t realize that you could do that just by its index. Just a question: why do you start the for loop with 1 instead of 0? I’ve just had a quick glance at Adobe’s scripting guide and didn’t find any reference to that.

[Dan Ebberts]

When using the property key methods, the key index numbers run from 1 through numKeys. You may be thinking of array indexing.