Looking for a solution to mosquito noise

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EnQuatre
Joined: Sun Nov 23, 2014 10:59 am
Location: Fuyuki City, Japan
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Looking for a solution to mosquito noise

Postby EnQuatre » Mon Aug 31, 2015 8:13 pm

Hey guys,

So who's the cool kid on the block these days in terms of a good set of denoising filters? I've got an .mpg source that looks mostly fine, but I do have a bunch of mosquito noise in a bunch of darker scenes... I've tried running through the various options in the video and audio tutorial on the org, but I'm getting the sense that that resource is somewhat out of date...

...what do you folks use as your go-to for smoothing or denoising?

I've tried the following (I'm not very good with avisynth, so I mostly copy-paste :oops: ):

super = MSuper(pel=2, sharp=1)
backward_vec2 = MAnalyse(super, isb = true, delta = 2, overlap=4)
backward_vec1 = MAnalyse(super, isb = true, delta = 1, overlap=4)
forward_vec1 = MAnalyse(super, isb = false, delta = 1, overlap=4)
forward_vec2 = MAnalyse(super, isb = false, delta = 2, overlap=4)
MDegrain2(super, backward_vec1,forward_vec1,backward_vec2,forward_vec2,thSAD=400)

The above just gives me fairly ugly banding and halos. It's worse than the original.

RemoveGrain(mode=8)
TTempSmooth()
LSFmod()

This doesn't make much of a difference.

TemporalDegrain()

Takes forever, and I get all sorts of other weird artifacts (fade outs don't work properly anymore, etc...)

Any advice would be super appreciated!

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post-it
Joined: Wed Jul 17, 2002 5:21 am
Status: Hunting Tanks
Location: Chilliwack - Fishing
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Looking for a solution to mosquito noise (cont)

Postby post-it » Tue Sep 01, 2015 5:40 pm

Looking for a solution to
mosquito noise - no such filter exists!

It's easy enough to create mosquito overlapping;
... check with FAB at doom9.org in their Forums.

and, no, I can't respond to your questions.

What would be helpful is a .png file were added
for reference. .jpg & .bmp won't let us see what
your talking about. ? Why a Picture;
too many times what you call something is usually
something completely different to us. ^___^

Laters

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EnQuatre
Joined: Sun Nov 23, 2014 10:59 am
Location: Fuyuki City, Japan
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Re: Looking for a solution to mosquito noise (cont)

Postby EnQuatre » Tue Sep 01, 2015 8:04 pm

Eh, I think you replied in the wrong thread...

Here are the examples you asked for, though!

http://imgur.com/a/fUUiT

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post-it
Joined: Wed Jul 17, 2002 5:21 am
Status: Hunting Tanks
Location: Chilliwack - Fishing
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Looking for a solution to mosquito noise (( cont ))

Postby post-it » Wed Sep 02, 2015 12:50 am

what you are fighting is
Film Grain being deposited by a Codex Error.

easy enough to create: SAMPLE
Image
we ran into this problem Years Ago.

if you leave the video alone: SAMPLE
Image

It's a JPG effect actually noticed
back when we were still using
DIVX & XVID. H264 solved it.

Simply stop using out-of-date codacs.


Umm, they have me locked-out from answering
questions because I'm not a College Guru, just
a member of the original MPEG testers and argued
against the SDKs given for free to Real Audio when
VIVO.com went under. Well, at least NOW you know
what your fighting. :sorcerer:


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