Can I get image size information from Loader node?

I am doing a simple macro for a repetitive task I do. It mainly consists of merging background nodes using Channel Boolean over the source footage. The problem I am having is that the source footage are not all the same size, and for the merge to work accurately, I need the Background nodes' size to be exactly as the original image.

Since the Loader doesn't have size information in the node itself, I am currently using a Resize node that drive the size of the background nodes I am using, but the problem is, I have to manually enter the size of the source footage if it is different from the default Frame Format settings. It is not that tough, but I think there is a better way to do it using expressions or the Custom Tool. I tried finding something online or in the manual, but without any luck.

Can anyone help?

Connect your loader node to the background input on a merge node. The merge node will return the current width and height of the connected footage using the following two expression variables:

Merge1.Background.OriginalWidth
Merge1.Background.OriginalHeight

These values can then be used in expressions in the rest of your comp.

Thank you very much, Andrew.

Loader1.Output.OriginalWidth should work too, though.

Thank you very much, Chad. This is really brilliant. It actually works on other nodes (other than the Loader I mean) as well.

Thanks guys. Just to add, for anyone pulling their hair out trying to figure out how to have text show image dimensions and have come here via a google search, the expression is:

Text(Merge1.Background.Width.."x"..Merge1.Background.Height)

and just replace Merge1.Background.Width and Height as appropriate, bearing in mind previous replies.

The .. act as separators for different data, that's where I was going wrong.

To be more precise, .. is the string concatenation operator. It is used to connect two bits of text to one another. You could write:

"Text portion 1 ".."is connected to text portion 2."

The result would simply be "Text portion 1 is connected to text portion 2." That's simplistic, of course. It's more often used as you see there, where you're connecting text stored in variables:

Code: Select all

software = "Fusion"
comparison = "less"

print(software.." sucks "..comparison..".")


That will print "Fusion sucks less."