I have a participant that will be sharing screen from a mobile phone for a demo. I want to mask their screen share to give it rounded corners. If I use the mask I created on a Zoom camera input, it works perfectly. If I use the mask on the live screen share from the phone, the mask gets compressed horizontally by a huge factor. I'm guessing it has something to do with the screen share not being 1920x1080. If I take a snapshot of that live share and mask it, it works fine. I tried to create a new input and put that live sharing input on it as a layer, and then mask it, but that doesn't work because the masking only effects the actual input (layer 0), and not any of the other layers.

How can I solve this issue?

Attaching pic of the phone share snap that does work, alongside the live input which doesn't work. image (8).png (408kb) downloaded 4 time(s).

Have you tried sending it to a mix input and masking the mix input?