Removing these combing(?) artifacts

[turbojet]

I'm not sure if this is combing or some other artifact but after trying about 10 deinterlacers I could not find anything that worked.

Sample at http://www.sendspace.com/file/s6yyra if anyone wants to take a stab at it.

[manono]

Those aren't interlacing artifacts, but low bitrate artifacts. Maybe try Deblock_QED on it.

It IVTC's cleanly and shouldn't be deinterlaced at all

[Guest]

Not sure about that being low bitrate artifacts. It looks like somebody did a bad deinterlacing on it, or processed interlaced video as if it was progressive or something. So, turbojet, please tell us more about your source...where you got it and how it was captured/processed. It will be better to mitigate this at the root cause.

[qwerty1983]

I think it's 3:2 pulldown. Try inverse telecine

[turbojet]

Deblock_QED didn't do much but blur the image

Source is untouched capture from local CBS affiliate, not cable/satellite

It's 3:2 pulldown and the image in OP is after ivtc. If you frame step the 2 dirty frames out of 5 are really bad looking at times in the mpg from OP. The artifacts really pop out after ivtc while playback in WMP/WMC of the original 30fps mpg it doesn't show much at all, although the dirty frames are still there.

[Guest]

You'll get much better help if you post an unprocessed source sample. It's unbelievable that CBS would broadcast anything so bad as what you have shown. If the unprocessed source looks that bad, then you need to look at your capture process. How did you capture that?

[turbojet]

Original is in the OP. The capture doesn't look nearly that bad, basically the 2 dirty frames need to be cleaned up to 2 identical clean frames to remove 1. Captured with WMC with no errors according to videoredo. It's not common to find things like this but it is common in a few shows I watch like "The Crazy Ones' here and 'The Blacklist' on NBC.

[Guest]

Originally Posted by turbojet

Original is in the OP.

You said:

"the image in OP is after ivtc"

So which is it?

I'm interested in the *unprocessed* source.

[turbojet]

Below the image I wrote: Sample at http://www.sendspace.com/file/s6yyra if anyone wants to take a stab at it.

Quoting doesn't work, too short.

[Guest]

OK, I see.

Then it's a case of garbage in garbage out. There's nothing useful you can do for this.

[turbojet]

Had a feeling that might be the case after looking at it frame by frame, thanks for taking the time to look.

[feisty2]

typical mpeg2 compression artifacts
use strong mdegain
something like

a=last
a.smdegrain (tr=12,thsad=2000,thsadc=2000).repair (a,mode=13)

should clean the mess

[turbojet]

SMDegrain is really slow, I suppose MT could help but I don't plan on spending all that much time for the few times this issue occurs, thanks for the suggestion though.

TDecimate(hybrid=1) does something interesting, it discards the bad frames, mostly, and blends the surrounding good frames. This would work great if instead of blending it would interpolate the surrounding 'good' frames, is that possible?

[feisty2]

Originally Posted by turbojet

SMDegrain is really slow, I suppose MT could help but I don't plan on spending all that much time for the few times this issue occurs, thanks for the suggestion though.

TDecimate(hybrid=1) does something interesting, it discards the bad frames, mostly, and blends the surrounding good frames. This would work great if instead of blending it would interpolate the surrounding 'good' frames, is that possible?

yes, it's doable,you can simply remove unfixable bad frames and create a good frame by using MFlowFps in MVTool2,but if the frame is in the middle of a high motion, the interpolated frame would be very ugly (artifacts like image dilaceration) so I still suggest using MDegrain instead of MFlowFps, MDegrain can almost fix any kind of bad frames if "thSAD" is high enough

[Taurus]

Originally Posted by feisty2

typical mpeg2 compression artifacts
use strong mdegain
something like

a=last
a.smdegrain (tr=12,thsad=2000,thsadc=2000).repair (a,mode=13)

should clean the mess

@feisty:
your code snippet gives me:

MAnalyse does not have a named argument "multi"" (SMDegrain v.2.2d)
Using Avisynth 2.6.0.5 MT (SET's build)
mvtools2 v.2.5.11.13
mt_masktools26 2.0.48.0

A simple call "smdegrain()" works fine.

[feisty2]

Originally Posted by Taurus

@feisty:
your code snippet gives me:

MAnalyse does not have a named argument "multi"" (SMDegrain v.2.2d)
Using Avisynth 2.6.0.5 MT (SET's build)
mvtools2 v.2.5.11.13
mt_masktools26 2.0.48.0

A simple call "smdegrain()" works fine.

you should use MVtools2mod from ditherpackage if tr>3 or lsb=true

[Taurus]

@feisty2:

Thank you

[HeadFi]

Originally Posted by feisty2

typical mpeg2 compression artifacts
use strong mdegain
something like

a=last
a.smdegrain (tr=12,thsad=2000,thsadc=2000).repair (a,mode=13)

should clean the mess

Hahaha that is insane radius mate. It will take weeks to encode )

[feisty2]

well...
do you really have to resurrect a 3 yrs ago thread...?

[kuchikirukia]

If OP tried tr=12 he still might be encoding it.