Preventing flicker when recording live presentations?

Question

Say someone's giving a presentation with the projector image next to them. What I see when recording this is the screen flickers, kind of like top-to-bottom scan refresh that's actually visible. What can be done to fix this? Recording is done with Canon 5DIII.

Answer 1

Hi there,

I would suggest adjusting the shutter speed and frame rate on the camera to best match the refresh rate of the screen behind the presenter. It does depend on the screen in the frame, but in general your camera's shutter speed should be as close as possible to a multiple of the refresh rate of the screen.

If you're shooting at 1/50 at 24fps try adjusting the shutter speed to 1/60 to see if it helps. Again, the exact setting depends on the refresh rate of the screen.