What is a picture, what is the number of mirrors, and what is the method of taking pictures?

Terminology of film and television production. Often used in script creation, film shooting and production. Picture: refers to the visual content within the four sides of the picture (which can also be understood as picture and screen) seen by the audience in the later period, including people, scenery, animals, subtitles and so on. Number of shots: All film and television works need to be composed of several segments with different time periods (each segment is not subdivided). These clips are often called "shots". Before shooting, the script needs to be rewritten as a "lens book" with "lens" as the unit, and then edited after shooting. Usually, in order to facilitate the organization of shooting and post-production, all "shots" are numbered in sequence. Photography: means and methods of shooting every shot. The annotations commonly used in these methods will display two elements: different scenes from close-up to panorama; Photographic equipment, such as freeze frame, push shot, pull shot, shake shot, tracking shot, etc. And the position change of the photographic imaging focus of the object. Under the current technical conditions, many annotations and designs are actually realized in post-production, not in shooting.