Property
| Member | Notes |
|---|---|
name, matchName | |
value | At the playhead, in AE units. |
valueAtTime(t, preExpression) | The keyframed value. Expressions run in the render, not in scripts. |
setValue(v) | Throws if the property has keyframes (AE's rule). |
setValueAtTime(t, v), setValuesAtTimes(times, values) | Add or replace keys. |
numKeys, keyTime(i), keyValue(i), nearestKeyIndex(t) | 1-based. |
addKey(t) | Returns the new key's index. |
removeKey(i) | |
setInterpolationTypeAtKey(i, inType, outType) | Brio eases per segment: the out type wins. |
keyInInterpolationType(i), keyOutInterpolationType(i) | |
setTemporalEaseAtKey(i, inEase[], outEase[]) | Becomes one curve for the segment leaving key i. |
expression | Get/set the property's expression. "" removes it. |
expressionEnabled | Get/set. |
isTimeVarying, canSetExpression |
Units
AE units throughout: position in top-left, Y-down comp pixels; scale and opacity in percent; rotation in degrees clockwise.
Effect parameters: numbers as numbers, checkboxes as 1/0, points as [x, y], colours as [r, g, b, a] 0–1, menus as their 1-based choice. Only number parameters can be keyframed from a script.
Example
var p = app.project.activeItem.layer(1).transform.opacity;
p.setValueAtTime(0, 0);
p.setValueAtTime(1, 100);
p.setInterpolationTypeAtKey(1, KeyframeInterpolationType.LINEAR, KeyframeInterpolationType.BEZIER);
p.setTemporalEaseAtKey(1, [new KeyframeEase(0, 33)], [new KeyframeEase(0, 75)]);Expressions from a script
layer.transform.rotation.expression = "time * 90";