2008-11-17, 18:06
rernst Wrote:See my other post: Since there is no such thing as interlacing where pulldown minimizes jitter how come my '60 Hz display rate' produces tear-free and jitter free video?Look, first off I don't want to sound patronizing or anything. It's just that I have banged my head on this for months and months, before XBMC was even involved.
Something does not add up.
Also note that I am using VFR just in case you presumed that there is some fancy logic in the NVidia card that adjusted to signal changes (which would be fancy indeed).
Tearing is a different thing. Tearing happens when the videocard sends a new frame "not in synch" with the display. This leads to tearing. This is what v-synch attempts to prevent.
Jitter, stutter, judder... those are words that are in various situations used to indicate different problems.
But in your case, at 60Hz, there is simply no way that you are getting a properly smooth playback from 24fps material. You will see 2 even frames and three odd frames, 2 even frames and three odd frames, reapeat. Take 24 frames in a second. 12 get reproduced twice, 12 get reproduce thrice. 24+36=60.
That looks smooth but, on slow pans, it can be seen that it's not perfectly smooth. To some people this is more evident, to others it's almost invisible. But the judder is there, it's just impossible to eliminate it.
At 24Hz or multiples, instead, you get 1-1-1 cadence or 2-2-2 or 3-3-3. That is smooth, as in movie theatres.