In the movie, how is the special effect that the object suddenly stops slowly made?

In general, the switching frequency of the film projector and the camera is synchronous, that is, 24 shots are taken every second, and 24 shots are also taken every second during the screening. At this time, the normal speed appears on the screen. If the photographer speeds up the shooting frequency, for example, 48 shots per second, then under the condition of still 24 shots per second, there will be slow motion on the screen, which is commonly known as "slow motion".

Bullet time, one of the special effects in slow motion, is a computer-aided photography technology used in movies, TV commercials or computer games to simulate variable-speed special effects, such as enhancing slow motion and time stillness.

The "bullet time" effect is famous for its wide use in the movie "The Matrix" produced by Warner Bros. Film Company in Hollywood. Among them, the slow motion of the hero Neo leaning backward to avoid bullets is a classic, hence the name "bullet time".

Later, this technology was widely used in film and television, advertising, creative activities and other fields.

There are five shooting methods of bullet time: camera array, single camera shooting, still scene, CG animation and multi-camera repeated shooting. Bullet time was originally realized by a series of still cameras (not video cameras) around the object. These camera arrays are usually triggered simultaneously or sequentially. Combining each frame of photos taken by each camera can form a rotating effect or a super slow-motion effect on static objects. Theoretically, a virtual camera can achieve unlimited viewing angle and frame refresh rate, but when it is implemented with a static camera, it is usually limited by the shooting path.