Video Editing Article
Linear editing, simply stated, involves the use of two tape machines and a device that controls those two machines. One tape machine is the "playback" device, which contains the original tape to be edited, and the second machine is the "record" device that records the new edited sequence. The device that controls the syncing of these two tape machines is an edit controller. A more complex system would include a third tape machine which would be used as an additional "playback" device. This would allow the combining of two separate tapes during the edit process.As the name implies, linear editing involves the editing of a sequence of events that are spread over a constant line, or in this case laid down on tape in a constant sequence. In other words, everything is recorded one scene after another.With linear editing, you would have to spend hours moving the tape back and forth though the "playback" machine picking out the scenes you wanted to keep and placing them in the right order. The time required to move the tape through the machine, skipping all the unwanted video, can be mind-boggling. With the revolution of digital video, the information that is laid down on videotape can now be converted to digital information. Written in a digital format, the digital information can be manipulated by a computer, the heart of the non-linear editing system. This solves the problem of mechanically moving the "play back" tape back and forth during the linear editing process, because the original tape is loaded onto the computer?s hard disk drive as digital data. The computer?s hard disk can access any scene of the video without having to read the entire tape from the beginning, so the editing process is no longer bound to the time requirements of moving tape.Scenes can be picked in any order, played and reviewed at any time during the edit process. They can be fine-tuned and transitions added between scenes. Because the computer sees the video as digital data, it is simple to manipulate. Sound can be added at anytime, from almost any source. And there is no generation loss with non-linear digital editing. The edited copy will be as clear as the original and you can edit as many times as you wish without any loss of video quality. Many video editing systems are computer-based. This type of system includes capture hardware that is installed in a standard computer along with editing software. The best news of all is the cost of non-linear video editing. This type of equipment needed for non-linear editing is a fraction of the cost of a full linear editing system. Generally you need a computer (Pentium III or better), capture card, enough hard disk space (tens of gigabytes easily) and suitable editing software (usually something for this comes with capture card or you buy it separately). This adapter card takes the analog video output signal from your camera or VCR and converts it to digital data needed for the computer. If you already have a digital camera instead of a video capture card, you will need an adapter card that will accept direct digital video.
Taken from http://www.epanorama.net/links/videoproduction.html#product
posted by BTroj @ 12:03 PM
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