How to do this in Wayland

[Jim]

I have Kubuntu 24.04 installed.  I managed to get Wayland working so I 
can use Waydroid.  Sometimes I need to capture what's displayed on the 
system's second monitor and use that as a second webcam so I can send 
that video to Zoom.

Using Xorg, this works.

ffmpeg -f x11grab -r 25 -s 1920x1080 -i :0.0+1920,0 -vcodec rawvideo 
-pix_fmt yuv420p -threads 0 -f v4l2 /dev/video0


How do I do this using Wayland?

Thank you