Automate keyframe values and align with split markers

[Andrei Popa]

This will make your text go from 0 to 100 for the duration of each marker on the layer.

n = 0;
if (marker.numKeys > 0) {
  n = marker.nearestKey (time).index;
  if (marker.key (n).time > time) {
    n--;
  }
}
if (n > 0) {
  t = marker.key (n).time;
  dur = marker.key (n).duration;
  linear (time, t, t + dur, 0, 100);
} else {
  value;
}

[Adam Walker]

Thanks for your response Andrei, though after effects seems to have a problem with line two as I get the following error.

” Unable to execute script at line2. marker is undefined “

I saved your script as a .jsx file and after selecting the text layer executed the script, could this be because the markers are split instead of whole?

Thanks,

Adam

[Andrei Popa]

This is an expression. Will work after you put the markers. Alt+click the stop-watch of the desired property of your layer and write there this code(if it’s something 2d, like size, you need to modify it a bit to work).

[Adam Walker]

This is a great expression and very close to what I’m looking for (thank you!) however is there a way to set actual key frames at the start and end of the split marker?

I need to be able to place additional keyframes in between the two main key frames in order to customise the reveal of a word to be sooner or later, so that I can sync the audio with the text.

Is this possible through an expression?

[Andrei Popa]

I think I understand what you want now. Here is a script that puts keyframes at the start and end of each marker of the selected layer. Select the layer than run this small script.

var selLayer = app.project.activeItem.selectedLayers[0];
var prop = selLayer ('ADBE Transform Group') ('ADBE Opacity');
var markers = selLayer ('Marker');
for (var i = 1; i <= markers.numKeys; i++) {
  prop.setValueAtTime (markers.keyTime (i), 0);
  prop.setValueAtTime (markers.keyTime (i) + markers.keyValue (i).duration, 100);
}

I thought that you wanted this to be responsive aka change when you modify the markers.

[Adam Walker]

This is exactly what I was looking for, thanks for you’re time and expertise Andrei!