duration in composition

Hi,

I am new to After effect scripting. can you please tell me how to change (increase and decrease values) the composition duration through script .

Thanks

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Correct answer Alex White

After Effects scripting reference page 31

AVItem duration attribute

app.project.item(index).duration

Description

Returns the duration, in seconds, of the item. Still footage items have a duration of 0.

• In a CompItem, the value is linked to the duration of the composition, and is read/write.

• In a FootageItem, the value is linked to the duration of the mainSource object, and is read-only.

Type

Floating-point value in the range [0.0..10800.0]; read/write for a CompItem; otherwise, read-only.

var myComp = app.project.activeItem;
myComp.duration = 10; // set duration

Alex WhiteCorrect answer

Legend

After Effects scripting reference page 31

AVItem duration attribute

app.project.item(index).duration

Description

Returns the duration, in seconds, of the item. Still footage items have a duration of 0.

• In a CompItem, the value is linked to the duration of the composition, and is read/write.

• In a FootageItem, the value is linked to the duration of the mainSource object, and is read-only.

Type

Floating-point value in the range [0.0..10800.0]; read/write for a CompItem; otherwise, read-only.

var myComp = app.project.activeItem;
myComp.duration = 10; // set duration

Participant

Thanks Alex,

You have made me to go one step ahead.

Thanks for your help once again

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