From what I have gathered on the interwebs, I found that beamer gives no basic options to change the papersize. I am however in desperate need of exactly that. Mind that I don't want to re-scale one or more frames to an A4, I want to actually change the size of every frame.
Is there any way to work around this?
@JosephWright To keep it as short as possible: I need to end up with the different slides in PNG format. These png's have to be a certain size. I was planning on simply converting the pdf to png's like you could normally do with LaTeX, untill I found out the problem with resizing in beamer.
@ prettygully I have, but it seems like beamerposter puts all the frames on one page, what would make the conversion to PNG's impossible
@ Andrew Stacey Your answers solved my personal problem as I was unaware of aspect ratio and my own ratio happens to be incredibly close to 16/9. I will correct the dimensions during PNG conversion.
I am still interested if anyone can come up with a general answer to the question thought.