Film as a medium is characterized by?

Modern science and technology as a means, with picture and sound as a medium, in the movement of time and space to create screen images, reflect and express the real life and thoughts and feelings of an art. Generally speaking, the movie is a comprehensive art that synthesizes art and science and technology, and the movie is also a synthesis of a variety of artistic elements. Not only that, movie is also a kind of audio-visual art developed from pure visual art. Montage is the most basic and unique method of artistic expression in film. The montage of the film, in addition to the lens, the lens and the lens of the combination between the relationship, but also includes the picture and the sound, sound and the sound of the combination between the relationship, which formed the organized segments, scenes, until a complete film. Movie can also be called space-time art, which has the nature of both time art and space art, and can directly appeal to the audience's visual and auditory senses with various forms of space-time combinations, reproducing the time and space relationship of the material world. The world on the screen is a special space-time complex. Film is the crystallization of the collective wisdom of all kinds of artistic personnel, the director is the center of the film production, he must be based on the film literary script, comprehensive design, overall conception, fully mobilize the creativity of various artistic and technical disciplines, **** with the completion of the film creation.