Answered
Premiere Pro Scripting: How to add Transition to Clip?
Hi guys,
I've browsed through many Youtube tutorials, documentations, and online forums, but I don't think I've seen one where it shows how to add video transitions to clips on a track, using a script.
I know there is an "addTransition" method for clips in QE, but I can't figure out what the arguments should be.
Here is what I have found out so far:
In ExtendScript, we can view an object's properties and methods using the Reflection object, as documented here: https://extendscript.docsforadobe.dev/extendscript-tools-features/extendscript-reflection-interface.html
So I've used it for a qeClip i.e.
var qe = app.enableQE();
var qeProject = qe.project;
var qeSequence = qeProject.getActiveSequence();
var qeTrack = qeSequence.getVideoTrackAt(0);
var qeClip = qeTrack.getItemAt(1);
Testing:
var qeClipName = qeTrack.getItemAt(1).name;
$.writeln(qeClipName);
Gives:
a-vid-B085TC6KG7_1.mp4
which is the correct name of the clip.
So:
var clipMethods = qeClip.reflect.methods;
gives:
addAudioEffect,addTransition,addVideoEffect,canDoMulticam,getClipPanComponent,getComponentAt,getProjectItem,move,moveToTrack,remove,removeEffects,rippleDelete,roll,setAntiAliasQuality,setBorderColor,setBorderWidth,setEndPercent,setEndPosition,setFrameBlend,setMulticam,setName,setReverse,setScaleToFrameSize,setSpeed,setStartPercent,setStartPosition,setSwitchSources,setTimeInterpolationType,slide,slip
In the list above, I have identified the "addTransition" method at index 1.
Testing:
var addTransition = qeClip.reflect.methods[1];
$.writeln(addTransition);
Gives:
addTransition
So now I would like to see what are the arguments for this "addTransition" method.
Per above documentation: that's:
obj.reflect.methods["indexOf"].arguments[0];
So,
var arguments = addTransition.arguments;
$.writeln(arguments);
Funnily,.gives:
p0,,,,,,
Furthermore,
var arguments0 = addTransition.arguments[0];
$.writeln(arguments0);
outputs:
p0
and:
var arguments1 = addTransition.arguments[1];
$.writeln(arguments1);
gives:
Nothing.
and so does addTransition.arguments[2], 3, 4, up to addTransition.arguments[6].
What should these arguments be?
How can we script for addTransitions?
Any help is appreciated 🙂
Thanks,
Amin
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