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Non drop frame
Non-drop frame time code is timecode that does not use drop frame and always identifies 30 frames per second. This way the time code running time will not exactly match normal time. This mismatch amounts to an 18 frame overrun every 10 minutes. This applies to 525/60 systems only.
References
Quantel Corp.
The National Film and Sound Archive of Australia acknowledges Australia’s Aboriginal and Torres Strait Islander peoples as the Traditional Custodians of the land on which we work and live and gives respect to their Elders both past and present.