Hello!
I am looking for a way to stream a single window from the laptop screen to a connected projector. Really only one window should be streamed, all others should only be displayed on the laptop itself.
I am using Fedora 36 with GNOME, the beamer is connected via VGA/HDMI.
My Laptop is an old Thinkpad X201, so OBS Studio would be too heavy for that 
Can you guys help me with this?
Thanks in advance!
you should able to do that out-of-the-box. a projector isn’t any different from a second screen.
so just move the window that you want to share to the second screen (your projector) and you are done.
In Settings, make sure you are not mirroring but extending your display…
Hallo augenauf!
Thank you for the help but this is not what I mean.
I mean, that a window, which is on the desktop of the built-in Display should be ALSO visible on the projector.
I found the half of the solution.
The command ffplay -video_size 1200x800 -framerate 15 -f x11grab -i :0.0+0,0 -fs captures the built-in display and shows it in fullscreen mode, but on the built-in screen.
If there would be an option to specify the screen, on which the fullscreen-playback should be done, it would be perfect.
Sadly ffplay doesn’t know an option like -screen 2 as mplayer does.
Mplayer on the other hand knows the -screen 2 option, but I coudn’t do, that mplayer uses x11grab.
Is there a way to bring the fullscreen playback of the built-in display to screen 2 (=projector)?
Thanks in advance!!