The window manager kept the projector's window on screen and no taller
than the display, so its opening size didn't include the menu bar, the
menu bar was measured as zero and stayed visible, and the movie was
squeezed into what was left. The menu bar's height is now read from its
own X window, with xwininfo, and the window is made override-redirect
before it's moved and resized, then given focus directly. The measured
height and the window's children are logged.
branderson