Help with remove combing in interlaced converted to progressive video

[Cheriff]

Hi.

I've been looking for a way to remove combing in a interlaced source that has been converted to progressive and scaled. I would like to know if would it be possible by any way to decomb interlaced artifacts in this example attached.

I tried to do it using Topaz AI and tried some scripts I found for AVIsynth, but no success.

Lot of thanks in advance.

[ProWo]

The best thing to do would be to edit the original interlaced video correctly if you still have access to it.

[Cheriff]

Yes, but I don't have access to the original video. If so, I would not have to deal with this

[jagabo]

The type of resizing used in that video loses too much of the interlacing information to get anything close to a proper deinterlacing. You can reduce most of the wavy artifacts but at the cost of losing a lot of sharpness in non-moving areas.

LWLibavVideoSource("vid.mov") 
Spline36Resize(1920,96)
QTGMC()
nnedi3_rpow2(16, cshift="SPline36Resize", fwidth=1920, fheight=1080)

I don't really think this is an improvement. Maybe one can work out a way to use a motion mask to process only the moving areas and keeping details in the still areas.

[Selur]

Argh,.. height 96, that is hard, not many details left with that.

[Cheriff]

The type of resizing used in that video loses too much of the interlacing information to get anything close to a proper deinterlacing. You can reduce most of the wavy artifacts but at the cost of losing a lot of sharpness in non-moving areas.

LWLibavVideoSource("vid.mov") 
Spline36Resize(1920,96)
QTGMC()
nnedi3_rpow2(16, cshift="SPline36Resize", fwidth=1920, fheight=1080)

I don't really think this is an improvement. Maybe one can work out a way to use a motion mask to process only the moving areas and keeping details in the still areas.

Thanks!!

Even it's blurry, for some clips with movement is better than interlaced. I think that I can use a mix between the interlaced for still shots and the script you posted for the movement.

Lots of thanks for your help!!!

[buzz1891]

Here my attempt, it's only partially fixed, but still has way more details:

BicubicResize(480,272)
c1= selectevery(2,0).FrameRateConverter(preset="normal", blendratio=70)
c2= selectevery(2,1).FrameRateConverter(preset="normal", blendratio=70)
merge (trim(c1,1,0), c2, 0.5)

mt=false  tr=2  blksize=8 overlap=4 thSAD=400  thSAD2=300  search=4  dct=0  limit=10
addborders(8,8,8,8)
sc_full = MSuper(hpad=0,vpad=0, mt=mt)
sc_ds  =  BicubicResize (width/2,height/2).MSuper(hpad=0,vpad=0, mt=mt)
mv_ds  =  sc_ds.MAnalyse (multi=true, delta=tr, blksize=blksize, overlap=overlap, search=search, dct=dct, mt=mt)
mv_dsr =  sc_ds.MRecalculate (mv_ds, tr=tr, blksize=blksize/2, overlap=blksize/4, thSAD=150, dct=dct, mt=mt)
mv     =  mv_dsr.MScaleVect(2)
MDegrainN (sc_full, mv, tr, thSAD=thSAD, thSAD2=thSAD2, limit=limit, mt=mt)
crop(8,8,-8,-8)
#return last

pf=AWarpSharpDering(debug=0, diffthresh=150, lumathresh=70)
em = pf.mt_edge (mode="prewitt", thY1=25, thY2=30, chroma="-128") .mt_inflate.mt_inflate .converttoY .fastblur(2)
#return em

Overlay(last, pf, mask=em)

[Cheriff]

Here my attempt, it's only partially fixed, but still has way more details:

BicubicResize(480,272)
c1= selectevery(2,0).FrameRateConverter(preset="normal", blendratio=70)
c2= selectevery(2,1).FrameRateConverter(preset="normal", blendratio=70)
merge (trim(c1,1,0), c2, 0.5)

mt=false  tr=2  blksize=8 overlap=4 thSAD=400  thSAD2=300  search=4  dct=0  limit=10
addborders(8,8,8,8)
sc_full = MSuper(hpad=0,vpad=0, mt=mt)
sc_ds  =  BicubicResize (width/2,height/2).MSuper(hpad=0,vpad=0, mt=mt)
mv_ds  =  sc_ds.MAnalyse (multi=true, delta=tr, blksize=blksize, overlap=overlap, search=search, dct=dct, mt=mt)
mv_dsr =  sc_ds.MRecalculate (mv_ds, tr=tr, blksize=blksize/2, overlap=blksize/4, thSAD=150, dct=dct, mt=mt)
mv     =  mv_dsr.MScaleVect(2)
MDegrainN (sc_full, mv, tr, thSAD=thSAD, thSAD2=thSAD2, limit=limit, mt=mt)
crop(8,8,-8,-8)
#return last

pf=AWarpSharpDering(debug=0, diffthresh=150, lumathresh=70)
em = pf.mt_edge (mode="prewitt", thY1=25, thY2=30, chroma="-128") .mt_inflate.mt_inflate .converttoY .fastblur(2)
#return em

Overlay(last, pf, mask=em)

Thanks!!!

This script produces a more detailed output!!