To start a videotape and let it roll for a few second before it is put in the playback or record mode in order to give the electronic system time to stabilize. Often necessary for analog devices.
The process of rewinding videotapes to a predetermined cue point (for example, 6 seconds) so the tapes are stabilized and up to speed when they reach the selected edit point (during digitizing of source material from a video deck).
To capture or play a number of video frames or a portion of audio data before encoding or rendering begins, in order to allow the source device to stabilize. Also used as a noun to describe the portion of the data to be prerolled.
A specific amount of time allowed for tape machines to run prior to an edit in order to get them up to speed and synchronized for the edit. In preparation for the edit, tapes are cued to a point ahead of the edit point to provide a proper preroll. The amount of preroll required varies with each type of VTR.
5 to 7 seconds of camera running time before a shot can be used. In editing, this refers to a similar amount of automatic backspacing the edit decks perform to insure a stable edit.
The time needed between the start of a videotape and when it stabilizes.
To prepare a device to begin a playback or recording function with minimal delay.
In film and video production, a location on videotape to which the tape is cued, occurring a few seconds before the in-point. The videotape recorder (VTR) starts from this preroll point top ensure that the tape speed is stable before recording begins.