Unfortunately the iOS device cameras have specific capture frame rate ranges that they support, and 1 fps is not one of them.
If that ever changes we'll be able to support it quite easily, yes.
I am not familiar with your setup, but would you be able to have a 1 second timer on the "grabbing" side of things and simply connect to the JPEG (instead of the MJPEG) ipCam URL to get a single image every second?