I have a Raspi4.
I'm using the pi to display RTSP camera streams using displaycameras.
I have no problem displaying the cameras on one tv.
I would like to output to two tvs (extend the display so I can show two full size streams), but when I hook a tv up to the second hdmi port, there is no signal to the second tv.
Any advice on how to enable dual monitors using command line interface only (GUI is not installed on this unit) would be greatly appreciated!