17-09-2026, 05:32 PM
(17-09-2026, 03:15 PM)colly0410 Wrote: Remember when I was a kid being at someone's house & they were showing old Charlie Chaplin & keystone Kops silent films & the flicker was horrid, being 16/18 FPS no wonder.
It might have been an artefact of the projector used to show the films - if it was basically a sound projector with a 16fps speed included as an afterthought.
'Proper' showing of 16 frames per second film has a shutter giving 48 flicks per second, with the film pulled down every third flick - fewer than 48 inherently gives an unacceptable degree of flicker due to the limits of persistence of vision.
Yes, motion is slightly more jerky than 24 frames per second filming (which also runs at 48 flicks per second - the film gets pulled down every second flick). But it's only noticeable with fast-moving objects.
If you slow down a 24fps projector to 16fps without changing the shutter (such as a 2-blade to a 3-blade) you will get 32 flicks per second which is below the limit of acceptability.
