In an active scene, several cameras shoot at the same time. The advantage of multi-camera is that he can record activities from different angles, such as close-up, middle view and panoramic view, according to the division of labor in advance or the director's guidance. Whether it is live broadcast or post-editing, it can reflect the activities more comprehensively and vividly. The disadvantage is that the shooting cost is high, so it is generally used for large or particularly important activities.