installed on your system. It will be automatically detected during
configuration.
-Alternatively, the configure option @option{--enable-x11grab} exists
-for legacy Xlib users.
-
This device allows one to capture a region of an X11 display.
The filename passed as input has the syntax:
@item video_size
Set the video frame size. Default value is @code{vga}.
-@item use_shm
-Use the MIT-SHM extension for shared memory. Default value is @code{1}.
-It may be necessary to disable it for remote displays (legacy x11grab
-only).
-
@item grab_x
@item grab_y
Set the grabbing region coordinates. They are expressed as offset from