Add track matte effect via CEP

[Andreas@Kaleido]

Hey, I am working on a Premiere Pro plugin and wanted to know if it is possible to add a "Track Matte Key" effect using CEP or do I have to use the C++ framework? Kinda lost here.

[Bruce Bullis]

There is no method for applying effects in PPro's supported ExtendScript API.

[Justin T - Hyper Brew · Accepted solution]

This is possible, but it requires using the QE Dom which is not offically supported by Adobe:

app.enableQE();

var clip = qe.project.getActiveSequence().getVideoTrackAt(0).getItemAt(0);
var effect = qe.project.getVideoEffectByName("Track Matte Key");

clip.addVideoEffect(effect);

[Andreas@Kaleido]

Hey Justin,

that's awesome! Will implement this in our plugin. Any idea how to set the video channel of the matte?

kind regards, andi

[Justin T - Hyper Brew]

Sure, just find the property and set the value with the number of the video track you want to set the matte to.

var clip = app.project.activeSequence.videoTracks[0].clips[0];
var effect;
for (var i = 0; i < clip.components.length; i++) {
    var component = clip.components[i];
    if (component.displayName == "Track Matte Key") {
        effect = component;
    }
}
if (component) {
    var prop = effect.properties[0];
    prop.setValue(4);
}