Many recordings have black bars either on top and bottom or at the left and right side due to the various aspect ratios used, resulting in a 4:3 coded 16:9 movie showing black borders on all four sides in fullscreen mode on a 16:9 monitor (top and bottom because of the movie, left and right because VLC doesn't know they are superflous and that 4:3 has to be fit on the 16:9 screen). Cropping the black bars with AviDemux would require a recoding.
Is it possible instead to let VLC display only the borderless part of the video?
I.e. somehow provide a config file or initially choose a "zoom" section.
Bonus question: I'll award a bounty of 100 rep for any automatic on-the-fly border detection and removal solution, be it VLC or other means, as long as it's free.