I'm using an image sequence in a material, it draws a series of incremental model outputs for a flooding on a landscape. However it's moving too fast for the rest of the flyover animation. It doesn't have to be completely smooth, so I'm hoping I can slow it down by say only using 1 frame of the image sequence for every 2 frames of the animation, or some other ratio. In other parts I would like to speed it up again. Is there a way to do this?
I can think of one way to hack it and that would be to write a python script which duplicates some interval of the image files and then changes the sequence numbers, but I'm hoping there is a more elegant way.