Change comp duration

[Dan Ebberts]

I’m not at a compute with AE installed right now, but this should work:

var myComp = app.project.activeItem;
myComp.duration += 500*myComp.frameDuration;

Dan

[Stanislaff Fabiyanskiy]

thanks thanks thanks!

[Luis Palencia]

Where do you write this expression? in a layer? can you send a screenshot plis? thank you very much!

[Dan Ebberts]

It’s not an expression, it’s a script. So you would run it either in the ExtendScript editor, or as a stand-alone .jsx file using AE’s File>Scritps>Run Script File… menu item.

Dan

[Luis Palencia]

Oh thank you very much.

Is there any expression that allows adjust the duration of a composition?

What I want to do is change the duration of many composition, each composition has a layer text, I want to change the duration of composition as long as the length of the text.

For example:

Composition1
Text: “Hello, Word”
Duration of Composition1 = 5 seconds (for example)

Composition2
Text: “Hello, Word. The sky is blue and the children play in the park”
Duration of Composition2 = 15 seconds (for example)

I want to calculate the length of the text with “text.sourcetext.length” and that multiplicate for 1 second and the result apply to the duration of that composition.

Can you help me t_t ???

[Dan Ebberts]

An expression can’t do that. You could do it with a script, but you’d have to run the script each time you wanted to update the comp durations.

Dan

[Luis Palencia]

And an expression to modify the duration of a text layer?

[Dan Ebberts]

Expressions can’t modify the duration of anything. The best you could do is an expression to control the opacity. Otherwise, it would have to be a script.

Dan