1 dropped frame per 5 minutes
This literally means that there will be 1 dropped frame per 5 minutes because of a mismatch between the media playback rate (23.976Hz) and the refresh rate (23.972Hz):
1/(23.976Hz-23.972Hz) = 250 sec = 4.17 min.
(The media playback rate is actually modified by audio clock, so madVR OSD is correct.) A dropped/repeated frame every few minutes is *to be* recognized as a slight stutter every few minutes. As you can imagine easily, this has nothing to do with jerkiness in a panning (that lasts only a few seconds). To avoid this type of dropped / repeated frames, you will need to use ReClock or VideoClock @24Hz [that will adjust the media playback rate to the refresh rate so that they are exactly identical], or use madVR's smooth motion frame rate changer (FRC) @50 or 60Hz [that will insert frames created by blending].)
There are two reasons for jerkiness in panning:
1. Pulldown judder: When you play a 24 fps content at 60Hz, frames are repeated (so called "pulldown") unevenly:
- The original video stream: F0 F1 F2 F3 ... (F=frame), 24 frames per second
- The displayed video stream: F0 F0 F0 (three times) F1 F1 (twice) F2 F2 F2 (three times) F3 F3 (twice) ..., 60 frames per second
Note that 24 x [(3+2)/2] = 60. People often recognize unevenness as jerkiness. At 50Hz, the repetition pattern is more complex. A solution is play a 24fps content at 24Hz. Another solution is madVR's smooth motion FRC.
2. Film judder: Simply 24 frames per second is not high enough for some people to feel the playback as smooth. A solution is increase the frame rate by creating *new* frames by interpolation. Some display devices have an internal engine for frame interpolation. You can do this in your PC by using, for example, SVP.
Not everybody is bothered with either type of judder. It looks like you don't mind pulldown judder, but mind film judder.Edited by renethx - 3/20/13 at 2:00pm