@SilverWook
I think I smell a THX movie fan in the Formula 1 Races. :D

@msycamore
I hope this is not too late an observation. Further back in the thread was a posting of "the lost scene" videoed right off a movie projection screen. Although there was a hot-spot from the projector washing out much of the picture, it didn't look like the brightness fluctuated like the film-capture does. Am I misreading this or was the capture camera on auto-exposure (a no-no)? If no choice, are you looking into a brightness control filter (a big job, I would think, as this would be done shot-by-shot, every shot)?