How is this film shown?

Movies use photography and recording to record the moving images and sounds of scenes on film at a certain speed (modern movies consume 24 pictures per second), and then project the still pictures of these scenes at various stages of movement to the screen continuously, and create the effect of reproducing the moving images of scenes in people's vision with the help of the phenomenon of "visual persistence".

Scientific research shows that the visual duration is about 1/5 ~ 1/30 seconds. When the film screen changing frequency reaches 15 ~ 30 frames per second, people can't see the pause between each still picture, but can only see the moving images of these continuously shown pictures.

In the early days of film invention, the standard frequency of frame changing for silent films was 16 frames per second, and then the standard frequency of frame changing for talking films was 24 frames per second.

Extended data:

1829, the Belgian physicist Joseph Prado established the "video persistence principle" through his own discovery, and he invented the "trick disc" according to this principle. Later, in 1834, Halner successfully experimented with "removable video disc". 1853, Austrian general Von Uchetios showed the original cartoon with slides on the basis of previous inventions.

How the film was made unintentionally: 1872, there was a heated argument between two Americans. The question they debated was: "Did all the horses land when they were running?" One person thinks there must be hooves on the ground, while the other thinks it is empty. When someone learned about this situation, they decided to use the camera to help them decide.

He set up 24 cameras and skillfully let the horses take pictures in turn while running. After that, these photos are cut together in sequence, and every two adjacent photos have little difference in action, forming a coherent photo band. According to this set of photos, the referee finally saw that when a horse is running, there is always a hoof on the ground and it will not fly.

Baidu Encyclopedia-Movie (Comprehensive Modern Technology and Art)