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Use higher resolution MPEG4s on the iPod Video
Authored by: fstop on Nov 02, '05 10:23:18AM

"(width * height * FPS * Q) / 1024

width = pixel width of the picture
height = pixel height of the picture
FPS = source DVD's frames per second
Q = bits per pixel quality for the codec. A good setting for MPEG4 is .23, and a good setting for H.264 is .15. You can change those to suit your tastes.
For a 720 x 304 widescreen movie at 24 FPS, the equation looks like this:

(720 * 304 * 24 * .15) / 1024 = ~770"

I would be very interested in knowing where this equation and constants came from. Aren't DVD-encoded movies about 30 FPS?



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Use higher resolution MPEG4s on the iPod Video
Authored by: lullabud on Nov 02, '05 10:29:27AM
It looks to me like he meant "widescreen film." ;-) FPS is a variable in the original equation, 24 was just filled in for the example.

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Use higher resolution MPEG4s on the iPod Video
Authored by: rpaul on Nov 04, '05 05:53:25AM
I would be very interested in knowing where this equation and constants came from. Aren't DVD-encoded movies about 30 FPS?
Most movies are encoded at 24 FPS as they were shot on film at the that speed. DVD players will do the 30 FPS conversion at playback.

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