On Wed, 6 Jan 2021 12:47:44 +0000
Ahem A Rivet's Shot  wrote:

> On Wed, 06 Jan 2021 13:13:42 +0100
> Axel Berger  wrote:

> >
> > Exactly. And there is another thing. Originally video had to be
> > fast, for the eye needed at least 70 Hz not to see annnoying
> > flicker. Those
>
>  That number seems to have been creeping up all my life -
> 24FPS was once considered good enough for movie cameras.
>

For filming, but it was never displayed at that rate. In 50Hz countries,
telecines and cinema projectors had a double shutter to display each
frame twice (though no interpolation) and NTSC telecines repeated
alternately 2/3 times to get it up to 60. Not sure if US cinemas did
that, or put up with 48Hz. Modern telecines can interpolate for
smoother motion, and play at any film speed.

--
Joe

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