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Eliminating motion judder

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Ali Jafri
Eliminating motion judder
on Jul 15, 2008 at 3:52:42 am

Hi people. Can someone please tell me how i can eliminate or smoothen out motion judder in video? I'm working on progressive pal video shot on 25 fps.

--------------------------------------------
Some people see things that are and ask, Why?
Some people dream of things that never were and ask, Why not?
Some people have to go to work and don't have time for all that.


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Jeremy Rasnic
Re: Eliminating motion judder
on Jul 15, 2008 at 2:56:15 pm

If you are referring to while shooting, you will need a good fluid head tripod and even then it takes practice. You may want to utilize a rubber band around your handle to pull with as it will make for smoother movement even still.

If you are referring to post production, you may want to take a look at a free piece of software called deshaker. A guy by the name of John Meyer wrote a script that makes its usage 5,000% easier!

You will need virtualdub as well to make it work correctly.

j razz



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John Rofrano
Re: Eliminating motion judder
on Jul 15, 2008 at 4:46:16 pm

I don't believe there is any way to fix Motion Judder in post. This is caused by motion that is too fast for the frame rate so that our "persisted vision" is not fooled into seeing fluid motion. When you shoot 25p or 24p you need to be very slow and deliberate in your moves. It's not like shooting 50i or 60i.

You could try converting to a higher frame rate so that Vegas creates in-between frames, applying motion blur and converting back but I'm not sure what you will get in the end.

Maybe someone else here has a trick up their sleeve.

~jr

http://www.johnrofrano.com
http://www.vasst.com



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Steve Rhoden
Re: Eliminating motion judder
on Jul 15, 2008 at 6:45:04 pm



I agree with John. Motion judder is almost impossible to perfect in
post. I know of no known solution to create fluid motion from
motion judder.
Personally, whenever iam working and comes across juddered content,
i discard it and come up with alternatives or go out and re-shoot.



Steve Rhoden
Creative Director
TNX EFFECTS STUDIOS.


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Ali Jafri
Re: Eliminating motion judder
on Jul 16, 2008 at 2:32:56 am

Steve, i've got almost eight hours of juddered video which cost me an arm and a leg and then some! I can't possibly reshoot! Isn't there any sort of motion-blur plugin that i could use? Or would anyone suggest going cross platform onto after effects and lose a generation to try and add some effect there save from the judder?

--------------------------------------------
Some people see things that are and ask, Why?
Some people dream of things that never were and ask, Why not?
Some people have to go to work and don't have time for all that.


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Steve Rhoden
Re: Eliminating motion judder
on Jul 16, 2008 at 4:36:37 am



Well Ali,
That then is a different story...you then have to work with what
you got. OK, here is the thing, if your footage cost you an arm and a leg, then its worth spending $145 to save it, The best tool i think may help is "DVFilm Maker" over at 'dvfilm.com'.

This for me, is my holy grail to give video a film look. It does a lot more like smooth fluid motion, de-interlacing and frame rate conversions, all with absolutely flawless results.

SO, Try the demo first on a portion of the most juddered clip,
with several tweakings and settings...etc...
because this will tell you if it will produce the fluid motion you seek (the demo works just like the full version).
And then let me know the results, because i could give a few
more pointers.



Steve Rhoden
Creative Director
TNX EFFECTS STUDIOS.


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Laszlo Kovacs
Re: Eliminating motion judder
on Jul 16, 2008 at 5:32:14 am

Hi,

What about Prodad's Mercalli?

I saw a demo of it, and personally I know Allen Zagel could achieve good results with it.
Maybe it worth a try.

Just an idea.


Regards

K.L.


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Steve Rhoden
Re: Eliminating motion judder
on Jul 16, 2008 at 5:39:47 am


Laszlo,
Yes,Mercalli is one of the best image stabilization tool around, i have it for sony vegas and it blows my mind how simple and effective this stabilization software is, but remember shaky images and motion judder are two completely different things.




Steve Rhoden
Creative Director
TNX EFFECTS STUDIOS.


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Allen Zagel
Re: Eliminating motion judder
on Jul 16, 2008 at 12:02:11 pm

Hi
Here's the two I use.

ArcSoft Video Stabilizer
http://www.arcsoft.com/products/videostabilizer/
@$64

Prodad Mercalli
http://www.prodad.de/gb/mercalli_std_details.html
@$120 for Mercalli Expert

If they won't totally fix it, at least they'll help smooth it out.

Allen

ASX Media Group, Inc.
http://www.asxvideo.com


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Terry Esslinger
Re: Eliminating motion judder
on Jul 16, 2008 at 4:52:40 pm

Aren't these both for image shakiness and not for motion judder. How about a definition and/or example of motion judder?




edit: Does Mercali work with HDV files?


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Steve Rhoden
Re: Eliminating motion judder
on Jul 16, 2008 at 8:17:12 pm



Terry,
Motion Judder is when movements (motion) in the video is slightly
stuttered...like a fast stop and go motion

And yes Mercalli for video stabilization which is completely different from motion judder...works with SD, HDV and HD files,
the 'expert' version i should say.



Steve Rhoden
Creative Director
TNX EFFECTS STUDIOS.


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Terry Esslinger
Re: Eliminating motion judder
on Jul 16, 2008 at 9:25:06 pm

Steve,
Thanks for the reply. Thats just what I thought but was unsure. The Mercali looks like an interesting program and since apparently it works for both SD and HDV I think I'll download the trial version (if there is one) and see how I like it. I think we all get a little shaky every once in a while. Do IO remember that this is one of those programs that will not allow you to use it on different computers (not at the same time) without jumping thriough a bunch of hoops?



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Laszlo Kovacs
Re: Eliminating motion judder
on Jul 16, 2008 at 6:11:43 pm

Hi Steve,

Thank you for the correction; based upon what I found in my dictionary about "judder" and what I know about Mercalli, I thought Mercalli could be in help.

Sorry for the misunderstood.

Anyway, I learn something every day :)))




Regards

K.L.


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