Depending on how fast you intend to speed it up, you may want to take a series of photographs instead of shooting video.
To get a nice fluid look in video or film most go for 1/(2xfr rate) for shutter speed. So if you’re going for shooting at 30fps you’d normally want 1/60th shutter speed. This is the 180 degree shutter rule, that the film is exposed for half of the time of the frame.
Thus, if you’re going to try taking photos you could try taking perhaps a 5s shutter picture, waiting 5s, taking another one, and so on, and putting them into a project, giving each image one frame of time?
I’m sure there is a perfect mathematical solution but my mind is much too boggled to realise what it is!
Daniel Hughes
Amateur Writer, Director,
Director of Photography
United Kingdom