ABSTRACT
Very few films are edited in the camera; some videos, such as legal depositions, may be a single continuous take with no editing at all. Almost every other project will require some editing and soundtrack tweaking, and most of them involve quite a lot of it. The world is linear. Noon always comes one minute after 11:59 a.m. Productions are linear as well. Even interactive Compact discs and DVDs are built out of essentially linear sequences. In linear editing, the timeline is inviolate. It starts at the head of the production, runs for the duration of the project, and then stops. Nonlinear editing revolutionized video production in the late 1980s, but it added only one new concept: the ability to pick up and move whole pieces of previously assembled timeline. It was a crucial difference. In nonlinear video editing, all of the images are stored in a computer, usually on hard disk.
