I played with --fs and --video-aspect-override. '--fs' gives a window that fills the entire screen. It still does not fix the problem:
I have a window that fills the entire screen -- but the video/picture is a slice in the middle of the window with a black top and a black bottom. I beleiv I fixed that in VLC by changing the aspect ratio. If it helps, my screen is 1920x1080. I got the numbers from the box the screen came in...
