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Thread: Advanced Timing Tutorial (Nvidia) somewhere?

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  1. #1
    This is one of the strangest threads I've ever encountered on the internet. Your refresh rate shouldn't affect your video playback regardless of the video's frame rate. Even if you have a video at 23.976 FPS, your video card will convert the overall output image to 60 Hz for your LCD to display. The refresh rate doesn't need to be a multiple of the video frame rate in order to play it smoothly. In fact, games would all be unplayable if this were true because the frame rate is constantly fluctuating between two extremes.

    The reason why DVI only gives you 60 Hz is that it reads the EDID from your monitor, and since LCDs are generally designed for 60 Hz only, it limits the degrees of freedom you have on the refresh rate setting. You get more options for VGA because you have less restrictions with an analog signal.

  2. #2
    Burning out, no really... David75's Avatar
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    Quote Originally Posted by Board of Command
    This is one of the strangest threads I've ever encountered on the internet. Your refresh rate shouldn't affect your video playback regardless of the video's frame rate. Even if you have a video at 23.976 FPS, your video card will convert the overall output image to 60 Hz for your LCD to display. The refresh rate doesn't need to be a multiple of the video frame rate in order to play it smoothly. In fact, games would all be unplayable if this were true because the frame rate is constantly fluctuating between two extremes.

    The reason why DVI only gives you 60 Hz is that it reads the EDID from your monitor, and since LCDs are generally designed for 60 Hz only, it limits the degrees of freedom you have on the refresh rate setting. You get more options for VGA because you have less restrictions with an analog signal.
    You know, I also thought it was strange, then I remarked that playback in scenes where the camera moves from right to left (or any steady direction), it's not smooth at all.
    Regardless of the os, codec, player, comp.
    It was hard for me to believe, but yes this is a common problem. So I researched, because it became unbearable to watch that stuttering or juddering or anyways you call it. You probably remarked there are lots of those paning scenes in anime, as they save lots of money by drastistically reducing the number of new frames to draw by drawing a larger one where nothing moves inside, only the cam...

    It's very hard to pinpoint, and my memory is bad so I can't give you the best example to date... If it comes back, even with my new settings, to how bad it was, I'll update with an example.

    It's related to any video encoded at 24FPS in paning (or traveling?) scenes.

    Example:
    You can see the phenomenon in

    [Rumbel]_Soul_Eater_-_16_[H264][Uncut][6D9140D0].mkv From roughly 5'07" to 5'20"
    It's not very strong there... but it's there nonetheless.
    Same ep, a lot stronger, 16'41" to 16'48"
    Then 17'13 to 17'19, strong again

    I hope it's not related to some other problems... but I'm sure I read threads on AVSforums and so on, so I'm not alone experiencing this.
    Last edited by David75; Sun, 01-04-2009 at 03:24 PM.

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