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> Since films are shot at 24fps, how were they converted to 25? Sped up by 4% to make them 25fps. The audio is supposed to be pitch-corrected, but some poorly
by lbschenkel 5y ago
> Since films are shot at 24fps, how were they converted to 25?
Sped up by 4% to make them 25fps. The audio is supposed to be pitch-corrected, but some poorly done conversions did not do that.
- jonny_eh 5y agoDoes that mean one of the frames is duplicated every second?
- AnssiH 5y agoNo. If you increase the speed of 24 fps video 4%, it becomes 25 fps. Frame count does not change, frames are just shorter.
- lbschenkel 5y agoYes. Imagine that you had a fast-forward button that changed the time per frame from 41.7ms to 40ms. This is what a cinema-to-PAL conversion does. It's a bit weird in the sense that everything is sped up and faster than normal. In the other hand, it's super simple and does not introduce the even weirder judder that a cinema-to-NTSC (telecine) conversion would do. Personally I think it's easier to get used to everything being slightly faster but unmodified otherwise than to having additional frames being inserted and the resulting judder in all motion.