4K isn’t any more tricky to edit? Interpolation only happens when you have frame rates that do not match – so shooting 30/60 fps and wanting a UK typical 25/50 fps product means throwing frames away which can introduce jitter, and shooting in 24/48 and then needing 30/60 requires frames to be duplicated. The problem in this case is that LED lighting has near instantaneous light up and light off states – and the car manufacturers now use PWM methods of con trolling their brightness. This means that they control the brightness by changing the amount of time they are on, not how bright they are. 50% on and 50% off is half brightness – so they just turn them on and off fast enough that the natural persistence of our eyes sees a flicker free steady state. Cameras have different shutter speeds, and different amounts of time the shutter is actually open – the old equivalent of the number of degrees open on an old fashioned film camera. The only way to reduce this effect on the car lights is to experiment with the camera shutter speeds – and hopefully one will be safe.
