x11vnc -display :0
x11vnc -shared -display :0 -clip xinerama0
x11vnc -shared -display :0 -clip xinerama0 -forever
You my pick the window id with xwininfo
x11vnc -sid 0x2600003 -display :0
x11vnc -display :0
x11vnc -shared -display :0 -clip xinerama0
x11vnc -shared -display :0 -clip xinerama0 -forever
You my pick the window id with xwininfo
x11vnc -sid 0x2600003 -display :0