Impossible to capture from webcam

Capture d’écran 2020-11-17 à 18.34.20

Whenever I try to capture from my webcam, this is what I get :
I’ve tried reinstalling the software, restarting the computer, etc.
I’m working on a MacBook Pro late 2012 running MacOS Mojave 10.14.6

Anybody can help…?

Use something else to capture your webcam. You can use Quicktime Player. Shotcut works for me on my macs and cameras, but I am not French and do not have the same hardware as you.