QR codes scanner?

So… I got situation where I need to scan QR codes from my webcam…

I tried QtQR - it doesn’t see my webcam. Tried this - image freezes when scanning

Same goes with this - image freezes (it is working, but super slow reaction to objects in camera view)

But if I install it via sudo apt install gnome-snapshot it doesn’t lag. So it seems as flatpak issue.

Well. Do you know any .deb simple QR decoders that can work directly frem webcam, without need to first take a pic then scan.

I need privacy-friendly solutions (so “just google QR scanner. thats it.” not needed).