There are actually two different sources of flickering.Faram wrote:Crappy monitor?Uraniun235 wrote:Then how do people perceive excessive CRT flickering at 60hz?
There is a reason that movies only shovs pictures at 24fps eatch a little diffrent than the one preeceding it.
Movies are shown with three times 24 fps. This means that 24 fps are recorded. But the Hardware playing the movie opens and closes a shutter thee times per frame, meaning that we see 72fps.
This type of flickering is because when one frame turns off and the next turns on, there´s a short period of black. The eye is able to recognize this brightness difference. Therefore the time this brightness difference takes must be very short.
The speed with wich stuff moves is also a problem. Normally 24 fps are enough to create a soft movement but if the speed of, for example a camera is too fast it is problematic. Directors therefore usualy move the camera either slow enough or really, really fast.