Which camera are you using Mr K? Are we talking about video? If video, turn off live view first then adjust speed and aperture accordingly using manual mode.
Sorry I have a D5100, I've done some test, and I conclude that for movies no matter what you with the speed, in or out of live view it makes no difference, it doesn't tell you in the manual.
Sorry I have a D5100, I've done some test, and I conclude that for movies no matter what you with the speed, in or out of live view it makes no difference, it doesn't tell you in the manual.