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brktoday at 1:26 AM1 replyview on HN

Not only was it built around AC, the technology at the time only allowed for roughly 1/2 the AC cycles rate. People think there was some great reasoning behind 30fps. It was just what was available, essentially.


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fragmedetoday at 2:10 AM

The original black and white NTSC was 30/60 Hz but was changed to 29.97 fps in order to be backwards compatible with black and white TVs.