Transforming compItem to different sizes using ExtendScript doesn't work as expected

Question

I have a compItem in AfterEffect of ratio 9:16. I am writing a script to auto transform it to different size/ratios. For example to 16:9 and other etc.

If I duplicate the current compItem manually through AfterEffect and change the pixel size (from 1080:1920 to 1920:1080), it crops the video from top & bottom equally, which is fine.

But through the ExtendScript, if I duplicate & then update the width & height, it crops the video from only one side (bottom).

Following is the script I wrote. Any insights would be a great help, thanks.

var copies = {
    '4:5': [1080, 1350],
    '1:1': [1080, 1080],
    '16:9': [1920, 1080]
};

var currentComp = app.project.activeItem;

for (var i in copies) {
    var newCompItem = currentComp.duplicate();
    var width = copies[i][0];
    var height = copies[i][1];
    newCompItem.name = i;
    newCompItem.width = width;
    newCompItem.height = height;
};

score 0 · Accepted Answer · answered Aug 13 '19 at 04:47

It can be achieved by following steps:

Create a new Null Object in current composition.
Make it a parent for all layers in the composition.
Write a script to change the size of composition as above.
Center the Null Object.

Centering the Null Object would auto center the layers as it's their parents.

Transforming compItem to different sizes using ExtendScript doesn't work as expected

1 Answers1