Reducing judder in bluray playback?

Devrij

Devrij

Devrij

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Hi all, does anyone know how to reduce the judder on slow panning shots caused by 60Hz 3:2 pulldown? It really bugs me sometimes when I'm getting my Attenborough on :p Any help would be greatly appreciated. :)
 
Is this on TV or comp?

There is a technique called motion interpolation which generates filler frames which sit between the standard video frames. Some new TVs have this feature built in. Never seen it in action so dont know how good it is.

I have also seen this which is a technique for getting your computer's media player to do motion interpolation. I had a brief play with it and could not get it to work but I was using a triple core back then and it is very cpu intensive. I think quad is minimum if you are hoping to do this for 1080 content.

If you get it working I would be very interested. Panning shots really annoy me. You wonder why directors allow them to be used when they will look so poor.
 
eddyc said:
If you get it working I would be very interested. Panning shots really annoy me. You wonder why directors allow them to be used when they will look so poor.
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Hey, it's your problem. I like my panning shots.

TV's these days generally support 24hz natively for smooth Blu-Ray playback. I've got my MediaPortal set up so that it automatically switches refresh rate to whatever the video is at (24hz, 50hz, or 60hz for NTSC) and everything's beautifully smooth for me.
 
I think we are talking about 2 different things. Motion interpolation is for extra frames per second.

Blu-ray has 24 frames per second. This is not smooth. No hardcore gamers would put up with 24fps in games so why should film watchers put up with it?
 
Apparently 48p is on its way, but who knows. I'll give that reclock a go, but as far as I'm aware 3:2 pulldown is happening before it even gets to my gfx card so I'll see how it goes. This is on my pc btw. Thanks for the feedback so far :)
 
lol most TV's will double/triple/quad the frames eg panasonics plasma's run them at 96hz pioneers used to do 72hz I believe. When you even go to the cinema they run it at 48hz normally.

Generally 99% of Blu-ray are 24p.
 
Reclock is filter that sits in the DirectShow decoding pipeline and adjusts the framerate and audio (or something :)), so it should work.

I think we are talking about 2 different things. Motion interpolation is for extra frames per second.
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Well, I was talking about the problem with 3:2 pulldown, since this was specifically mention in the OP :)

Blu-ray has 24 frames per second. This is not smooth. No hardcore gamers would put up with 24fps in games so why should film watchers put up with it?
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Blu-Ray can be 24, 50 or 60hz depending on the source material. Films are 24p (or 23.976) becuase that is the speed they are shot at, and it doesn't look jerky to me. Unless every film ever made has had jerky panning and I've managed not to notice.
 
Baboonanza said:
Reclock is filter that sits in the DirectShow decoding pipeline and adjusts the framerate and audio (or something :)), so it should work.


Well, I was talking about the problem with 3:2 pulldown, since this was specifically mention in the OP :)


Blu-Ray can be 24, 50 or 60hz depending on the source material. Films are 24p (or 23.976) becuase that is the speed they are shot at, and it doesn't look jerky to me. Unless every film ever made has had jerky panning and I've managed not to notice.
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Any idea what I need to do to fix that error with it? It's my main gripe with bluray playback so would love some nice smooth shots :D
 
Baboonanza said:
Blu-Ray can be 24, 50 or 60hz depending on the source material. Films are 24p (or 23.976) becuase that is the speed they are shot at, and it doesn't look jerky to me. Unless every film ever made has had jerky panning and I've managed not to notice.
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I think there is a distinction between Hz and fps. 24 hz is not 24fps I dont think...

Anywho you are right the OP was not complaining about the thing wot I thought he was. :rolleyes:

Anyone interested in motion interpolation and the problems caused by 24 fps filming. See The Big Judder Problem.
 
Devrij said:
Any idea what I need to do to fix that error with it? It's my main gripe with bluray playback so would love some nice smooth shots :D
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Not enough information. My immediate guess would be that you're running Vista of Windows 7 and Reclock is not UAC compatible.

Did you try right-clicking and selecting 'Run as Administrator'?
 
Oops, sorry. I seem to have pointed you at an old version, the curretn version seems to be here.The first google hit and offical page is out of date!

Try that, it's from december last year so will have been tested with Windows 7.
 
Gave it a shot, and even with my monitor set at 50Hz and reclock playing blurays back at 25Hz x2 it was still flickery and stutters, but just a little bit faster :( Used opening scene from march of the penguins (lots of long panning shots of icebergs) and no joy. Still, it seemed to be a small improvement so may set up some profile hotkeys for bluray playback and see how I get on. I think interpolation sounds like the way forwards when I eventually upgrade to a decent quad.
 
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eddyc said:
I think there is a distinction between Hz and fps. 24 hz is not 24fps I dont think...

Anywho you are right the OP was not complaining about the thing wot I thought he was. :rolleyes:

Anyone interested in motion interpolation and the problems caused by 24 fps filming. See The Big Judder Problem.
Click to expand...
24 Hz is the refresh rate (how many times the screen will refresh the picture every second). FPS is the recording/playback rate. You are correct, they aren't the same. Your monitor is capable of 80+ Hz refresh probably, but certainly surfing the web isn't utilising even 1 FPS.

I like that article you posted. :)

Good thread! Judder bugs me as well.
 
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