I have been given the task to cut together footage of 4 dancers dancing on a green screen, with the output being a video file that will be projected on the walls between the windows of a building. (I have attached a photo so you can get a sense of the project.) The project is occurring in the afternoon and evening; so it won't be totally dark when I am projecting.
I think editing the footage will be fine; I will need to do my maths homework to get the dancers in the right place, but that should be ok, touch wood!
What I am concerned about is how I:
a) render a file with an alpha background
b) find a media player that will work with an alpha background
c) and I am not sure how a projector will handle the alpha either. If the project was entirely at night, I would just use a black background, but I think it would be better to have no background, if at all possible.