Premiere Pro Scripting: How to add Transition to Clip?

[aminn75893596]

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....

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

[Bruce Bullis · Accepted solution]

QE DOM is unsupported, and not recommended. [I've reached out to Amin directly.]

[aminn75893596]

Thanks!

[Nguyễn Hữu Phước]

var qe = app.enableQE();

var qeProject = qe.project;

var qeSequence = qeProject.getActiveSequence();

var qeTrack = qeSequence.getVideoTrackAt(0);

var qeClip = qeTrack.getItemAt(0);

qeClip.addTransition(qeProject.getVideoTransitionByName("Dip to Black"));

I noticed this will add "Dip to Black" between clip (0) and clip (1)