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Genlock   Genlock video switchers for Amiga  nVidia Quadro FX 1300 Genlock (derived from Generator Lock) refers to a technique where the video output of one source, is used to merge other television picture sources together, such that the resolution and signal timing coincide with each other. When multiple video sources are synchronized in this way, they are said to be genlocked. In video production and broadcasting, genlock is frequently used to combine, mix or fade in/out multiple video signals for television programs. In fansubbing, a genlock refers to the video switcher device that creates this effect. In the past, this was the only known method to place subtitles onto analog video sources, making the genlock a basic staple of VHS fansubbing equipment. To create a VHS fansub, two video sources are required:
 These video sources are then connected to the genlock, which combines both signals. The resultant combined output of the analog tape with the newly overlayed subtitles is then recorded on to either VHS or S-VHS tape as the master copy. While synchronization of the signals is managed by the genlock, some manual synchronization is required, such as timing the subtitles correctly line by line beforehand, and simultaneously pressing play on both the video player and the computer at the same time for the recording session. While genlock units varied in price and complexity, most of them were far too expensive for individuals to afford. Ranging from $3000 to $10,000 USD each, some fansub groups would rent or borrow a genlock from elsewhere in order to carry out their normal fansubbing work. However, there have been claims of individuals who have bought a genlock, or have contributed money into purchasing one for their group in the past. Modern digital fansubbing does not require the use of a genlock, although there are moderately priced computer graphics cards that now support genlock for desktop computer video production. Related Links |