How much could you alter the film if Abraham Zapruder had shot in slow motion mode?

[Chris Davidson]

Thanks Chris - the 15fps play speed makes the movie look slower than would normally be if played at 18fps - correct?
Yes, that is correct.

The other thing is that the final ratio of total starting frames to total ending frames needs to be 18.3
48/18.3 conversion ratio is provable in a particular spot on CE884.

48fps / 18.3 fps = 2.623
486 frames x 2.623 = 1275 total frames if it was all filmed at 48fps.

In your motorcycle example, take the total frames and divide by 2.623 to get the ending # of frames required.

136 frames / 2.623 = 52 frames which means we need to cut 84 frames and show at 18fps on a projector.

Just look how jumpy this is even though it is stabilized. the jerkiness of the forward motion of the limo is exactly what we see when removing frames from the motorcycle scene
When the limo slows just before 313 it also smooth and then just after, it looks like a number of frames are gone - there is a jump in the film and the impossibly fast movements of Greer and Kellerman.
Probably what occurs when you break sequence and add multiple 48fps frames back to the extant film.

I removed the 2nd and 3rd frame from each 3 frame pair thru the turn then it goes back to no frames missing at 48fps shown at 18fps.roof
Your proof of concept is well-established. Don't spend too much time recreating multiple sequences, we understand the concept. imo

chris

P.S. Still pondering how to introduce the supporting equation for 48fps/18.3fps conversion.

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