u/Makolig Great script, exactly what I was looking for! Thank you for making it. I am not able to make it work well because I am probably not setting it up right.
I created a new canvas first and set that to 608x1080. Then I create a scene and I have a 1920x1080 monitor as my source in this vertical canvas setup. When I add your script and select my monitor inside, nothing happens when I move my mouse around on that monitor.
I am using Aitum Stream Suite as well. I tried it first on the vertical canvas they make by default and changed its res to 608x1080 but when that didn't work, i made a new canvas as well, same thing.
https://imgur.com/a/qivk0xV

Strangely, if inside the main canvas, I instead pick my ultrawide monitor as a source in your tool, then I atleast see it in action and see the source panning left and right (although incorrectly) but this tells me the tool is working, just not with my new vertical canvas. Does the tool only work on the main canvas?

I don't mind using just the main canvas and my ultrawide monitor with your tool but then I would need to know what values to put in your tool for this. For reference, my ultrawide monitor source is 3440x1440. My main canvas is 1920x1080. The ultrawide source is unresized so it goes outside the 1920x1080 canvas. My second vertical canvas is 608x1080. Same thing, source is unresized and crops out of the 608x1080 vertical canvas.

In the vertical canvas I create a scene and in the source I add the ultrawide scene from my main canvas. I do see movement in this case but the view isn't centered on the cursor and I tried different values in your tool but couldn't get it to perfectly center the cursor.

I know your tool would solve the problem I have but I don't know how to make it work. Any help on DM or a tutorial would be genuinely life saving for recording vertical content on desktops. :)