Many of my old VCRs used a counter number which I believe was related to the number of revolutions of the recorded spindle. For example, a counter of 1560 was about 1 hour into a tape recorded in EP mode. My newer VCRs use elapsed time. I want to transfer my old tapes, but my index cards are based on the counter number, not elapsed time, so trying to find a specific clip could be tedious. I'm not sure if the counter number was standard adopted by all manufacturers at the time, but I am hoping that there is a formula to convert the counter number to elapsed time based on the recording mode.
I do remember that the counter was not linear. Two hours of EP recording was less than two times 1560, so I do not believe that it was related to the tape footage.
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