How to Interpret footage for multiple clips?

With my upcoming extension Automation Blocks you can create these kinds of scripts in no time by combining blocks instead of writing code. Here is one that I just wrote for your task: It shows a dialog where you can enter a new frame rate and then applies this frame rate to all currently selected footage items:

I will add this script to our community library.

We will start a public beta for Automation Blocks this week - most likely already tomorrow.

I think this works:

var myFootageItem;
for (var i = 1; i <= app.project.numItems; i++){
	if (app.project.item(i) instanceof FootageItem){
		myFootageItem = app.project.item(i);
		if ((myFootageItem.mainSource instanceof FileSource) && ! (myFootageItem.mainSource.isStill)){
			myFootageItem.mainSource.conformFrameRate = 24;
		}
	}
}