The movement of the image through a scene, photographed by a camera mounted on tracks. A dolly shot creates the same movement with a camera mounted on a mechanical cart, while a hand-held camera is mounted on a cameraperson's shoulder.
In motion picture terminology, a tracking shot (also known as a dolly shot or trucking shot) is a segment in which the camera is mounted on a wheeled platform that is pushed on rails while the picture is being taken. One may dolly in on a stationary subject for emphasis, or dolly out, or dolly beside a moving subject (an action known as "dollying with"). Cabiria was the first popular film to use dolly shots, which in fact were originally called "Cabiria movements" by contemporary filmmakers influenced by the film; however, some smaller American and English films prior to 1914 had used the technique prior to Cabiria.