A match on Action, a technique used in film editing, is a cut that connects two different views of the same action at the same moment in the movement. By carefully matching the movement across the two shots, filmmakers make it seem that the motion continues uninterrupted. For a real match on action, the action should begin in the first shot and end in the second shot.
It's difficult to visualize this without a real film in front of you, but a diagram may still be useful . In the situation illustrated below, a person stands up from a sitting position.
+------------------------------------+ | | | | | __ | | / \ ^ | | | o | | | |@ \ | | | \__- | | | / \ | +------------------------------------+Shot 1: In this shot, we see the person beginning to get up from a sitting position . The arrow indicates the person's direction of motion.
+------------------------------------+ | ___ | | / \ | | |o o| | | | v | ^ | | \_-_/ | | | / \ | | | / \ | | | | | | +------------------------------------+Shot 2: There is a cut to this shot, which shows the person finishing standing up. The main difference from shot 1 to shot 2 is the position of the camera.
_ / \ -------|O )-------->[2]------------------ \_/ v [1]Overhead: This overhead diagram illustrates the camera positions for the two shots (the cameras are denoted by the bracketed numbers; the person is the lozenge on the left; the dashed line is the axis of action. When the person begins to stand up, we see the action from the vantage point of camera 1. When the person has stood up quite a bit, we see the action from camera 2.
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