Correction of film "wiggle" (See example)

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Garylisk
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Correction of film "wiggle" (See example)

Post by Garylisk » Thu Aug 21, 2008 9:32 pm

In the following clip, you will see this wonderful wiggliness.

http://www.fotsubs.net/amv/test2.avi

Now, apart from the low bitrate encoding, the thing you should notice about this is the wiggling during mostly still frames. I think it happens because of the film's original shaking, plus dot crawl that's being cleaned, plus the IVTC grabbing frames from different sections of the shaky film.

So, nasty question... apart from overlaying a still image of still scenes, or editing frame by frame, or something else nearly-infinitely tedious... is there some way to clean up this wiggle?

If anyone knows a good way, they get a cookie.
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Garylisk
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Post by Garylisk » Thu Aug 21, 2008 9:33 pm

Doh, and also, my initial intent was to ask if there was some sort of avisynth filter that helps with this, thus I posted in the avisynth forum... but the more I think about it, the more I think this belongs elsewhere.

Move this if you must, mods, to wherever you feel it belongs.
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Post by EvaFan » Fri Aug 22, 2008 3:41 am

I've never used this plugin before and I don't know much about it but you might give it a try:
http://avisynth.org/vcmohan/DeJitter/DeJitter.htm

The example clip made me think of VHS jittering like it was Captured from a worn out VHS tape or something.

If that doesn't work you might try severe denoising and some spatial smoothing filters though that comes with the risk of damaging the detail of the footage in other ways so I dunno. I'm at a loss really, never worked with something like that.
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Post by Garylisk » Fri Aug 22, 2008 4:59 pm

That is a very nifty filter, but it does not help with this.

I think I may just be stuck, I've tried a lot of stuff this past day.
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Post by mirkosp » Fri Aug 22, 2008 7:24 pm

If you're ok with using an actual effect in premiere/after effects/vegas instead of an avisynth filter... you might want to try this. :wink:

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Post by Garylisk » Fri Aug 22, 2008 8:30 pm

mirkosp wrote:If you're ok with using an actual effect in premiere/after effects/vegas instead of an avisynth filter... you might want to try this. :wink:
Unfortunately, that is the same as DePan, which doesn't work. It tries to detect shaking from shaky hands holding a camera, as well as smoothing out jerky panning, but it doesn't work well with anime, and the wiggling was left intact. :(
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Post by 808-buma » Fri Aug 22, 2008 9:06 pm

I had the same problem with the regular release of Eva, and the only way I found at the time to overcome it was to do it frame by frame and manually correct it...

PITA, but depending on how many areas you're talking about, might be doable? Maybe someone smarter than me might give more light to the situation?

Sorry no good news from me...

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Post by Garylisk » Fri Aug 22, 2008 9:12 pm

808-buma wrote:I had the same problem with the regular release of Eva, and the only way I found at the time to overcome it was to do it frame by frame and manually correct it...

PITA, but depending on how many areas you're talking about, might be doable? Maybe someone smarter than me might give more light to the situation?

Sorry no good news from me...
They need to just re-release the damn Tenchi OVA with a new transfer from the master. Last time they re-released it, they put it on 4 discs of some such, instead of 2, but then used the same encode and horrid quality transfer as before. :down:
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Post by rook2pawn » Sun Aug 24, 2008 11:02 am

I've noticed the same wiggle problems. The problem seems to be coming from the fact that anime is basically a series of cells that are captured, and if the cell sheets arent placed perfectly, then you get wiggle. on top of that multiple cell sheets can make for very difficult-to-detect wiggle because its not a global wiggle, but a per-character or per-object wiggle.

Motion Vector analysis like the one in Deshaker (for VirtualDub) is like you said, for stabilizing hand held cameras and only really suitable for correcting large scale shakiness of the global frame, like walking and filming at the same time.

i dont know how to solve the anime shake problem. maybe they have the original cells lying around and they can just reshoot it :o

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Post by rook2pawn » Sun Aug 24, 2008 11:05 am

btw, i think solving it in application, like After Effects might be useful because you can apply specific de-shake parameters as often as needed throughout the video

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