the time that a video tape recorder takes to come up to operating speed for recording. A typical pre-roll takes about 3 to 5 seconds.
During recording, both source and recording machines can be rewound, generally three frames, so that the beginning of the recording starts when both machines are running at the correct speed. As a result, edits are more frame-accurate.
This refers to the sequence of events before and edit begins during which the plyer and recording VTRs are synchronised.
the process whereby the record-VCR and playback-VCR tapes first roll backwards then forwards again to enable them to lock on to each other's control-track pulses to run together in sync from the released 'paused' positions before making an edit.