VHS chroma edge ghosting

[real.finder]

I got a VHS cap with chroma edge ghosting

sample http://www.solidfiles.com/d/cabdf11b35/Toei_0_07-2_OP.mp4

click (Direct download link) for Direct download


ffmpegSource2("D:\Toei_0_07-2_OP.mp4")
TFm.TDecimate
ConvertToYV12
vToY


frame 122 http://a.pomf.se/zhrjvi.png (http://web.archive.org/web/20150611203615/http://a.pomf.se/zhrjvi.png)

with pointing http://a.pomf.se/lszbfa.png (http://web.archive.org/web/20150611024932/http://a.pomf.se/lszbfa.png)

How to remove this?! it cause chroma artifacts

Thanks in advance

note: the scan order is Bottom Field First

addition: and this avi muxed from original .dv with aviddmux http://www.solidfiles.com/d/8f9f7c9d27/Toei_0_07-2_OP.avi

with the avi sample you can get the original Chroma subsampling with LWLibavVideoSource

[johnmeyer]

When I click on the download link, and then try to begin the download by clicking on the "download" button, your site lists it as an EXE file, not an MP4 file. Should I be concerned?

[real.finder]

When I click on the download link, and then try to begin the download by clicking on the "download" button, your site lists it as an EXE file, not an MP4 file. Should I be concerned?

http://a.pomf.se/vbptsh.png

like I say above

[johnmeyer]

Ah, I see, click on the tiny text link, not the big download button. I wonder what sort of people create schemes like this?

I'll try to look at it tomorrow.

[real.finder]

Ah, I see, click on the tiny text link, not the big download button. I wonder what sort of people create schemes like this?

I'll try to look at it tomorrow.

Thank you, waiting for you :)

[johnmeyer]

I downloaded the MP4, but couldn't get anything to play it. I converted it to an uncompressed AVI using ffmpeg (something that almost always works), but nothing would play that either. I don't know if the problem is on my end or yours, but whatever the reason, I won't be able to help on this one.

[johnmeyer]

I finally got a conversion with ffmpeg. I didn't try to IVTC the source, but instead just dealt with it as is. The old chroma shift designed for 2nd generation video seems to help a little. Try this out:

Loadplugin("C:\Program Files\AviSynth 2.5\plugins\MVTools\mvtools2.dll")

source=AVISource("E:\Documents\Dnload\UNPACK\7z\ffmpeg-20150311-git-2e5605f-win32-static\ffmpeg-20150311-git-2e5605f-win32-static\bin\output.avi").killaudio().AssumeBFF()


output=MDegrain2i2(source,8,0,0)
stackhorizontal(source,output)
#return output

#-------------------------------

function MDegrain2i2(clip source, int "blksize", int "overlap", int "dct")
{
Vshift=2 # 2 lines per bobbed-field per tape generation (PAL); original=2; copy=4 etc
Hshift=2 # determine experimentally
overlap=default(overlap,0) # overlap value (0 to 4 for blksize=8)
dct=default(dct,0) # use dct=1 for clip with light flicker

fields=source.SeparateFields() # separate by fields

#This line gets rid of vertical chroma halo
fields=MergeChroma(fields,crop(fields,Hshift,Vshift,0,0).addborders(0,0,Hshift,Vshift))

#This line will shift chroma down and to the right instead of up and to the left
#fields=MergeChroma(fields,Crop(AddBorders(fields,Hshift,Vshift,0,0),0,0,-Hshift,-Vshift))

super = fields.MSuper(pel=2, sharp=1)
backward_vec2 = super.MAnalyse(isb = true, delta = 2, blksize=blksize, overlap=overlap, dct=dct)
forward_vec2 = super.MAnalyse(isb = false, delta = 2, blksize=blksize, overlap=overlap, dct=dct)
backward_vec4 = super.MAnalyse(isb = true, delta = 4, blksize=blksize, overlap=overlap, dct=dct)
forward_vec4 = super.MAnalyse(isb = false, delta = 4, blksize=blksize, overlap=overlap, dct=dct)

MDegrain2(fields,super, backward_vec2,forward_vec2,backward_vec4,forward_vec4,thSAD=400)

Weave()
}


Experiment with VShift and HShift.

[johnmeyer]

Actually, on second thought, I think my script makes it worse.

[real.finder]

I finally got a conversion with ffmpeg. I didn't try to IVTC the source, but instead just dealt with it as is. The old chroma shift designed for 2nd generation video seems to help a little. Try this out:

Loadplugin("C:\Program Files\AviSynth 2.5\plugins\MVTools\mvtools2.dll")

source=AVISource("E:\Documents\Dnload\UNPACK\7z\ffmpeg-20150311-git-2e5605f-win32-static\ffmpeg-20150311-git-2e5605f-win32-static\bin\output.avi").killaudio().AssumeBFF()


output=MDegrain2i2(source,8,0,0)
stackhorizontal(source,output)
#return output

#-------------------------------

function MDegrain2i2(clip source, int "blksize", int "overlap", int "dct")
{
Vshift=2 # 2 lines per bobbed-field per tape generation (PAL); original=2; copy=4 etc
Hshift=2 # determine experimentally
overlap=default(overlap,0) # overlap value (0 to 4 for blksize=8)
dct=default(dct,0) # use dct=1 for clip with light flicker

fields=source.SeparateFields() # separate by fields

#This line gets rid of vertical chroma halo
fields=MergeChroma(fields,crop(fields,Hshift,Vshift,0,0).addborders(0,0,Hshift,Vshift))

#This line will shift chroma down and to the right instead of up and to the left
#fields=MergeChroma(fields,Crop(AddBorders(fields,Hshift,Vshift,0,0),0,0,-Hshift,-Vshift))

super = fields.MSuper(pel=2, sharp=1)
backward_vec2 = super.MAnalyse(isb = true, delta = 2, blksize=blksize, overlap=overlap, dct=dct)
forward_vec2 = super.MAnalyse(isb = false, delta = 2, blksize=blksize, overlap=overlap, dct=dct)
backward_vec4 = super.MAnalyse(isb = true, delta = 4, blksize=blksize, overlap=overlap, dct=dct)
forward_vec4 = super.MAnalyse(isb = false, delta = 4, blksize=blksize, overlap=overlap, dct=dct)

MDegrain2(fields,super, backward_vec2,forward_vec2,backward_vec4,forward_vec4,thSAD=400)

Weave()
}


Experiment with VShift and HShift.

it is still there http://i.imgur.com/Lp7HFs2.png

[johnmeyer]

You missed my previous post: I said that, on second thought, it didn't work very well.

[real.finder]

You missed my previous post: I said that, on second thought, it didn't work very well.

that right

thank you anyway :)

my last best try is


LWLibavVideoSource("D:\Toei_0_07-2_OP.avi", cache=false, dr=true).Crop(0,0,-16,0).AssumeBFF()
SeparateFields
y=last.ConvertToYv12.LGhost(1,4,80,2,20,2,3,4,-80).ConvertToY8()
u=uToY.LGhost(4,5,40,1,5,-50).ConvertToY8()
v=vToY.Invert.LGhost(1,5,-50).ConvertToYUY2.FixVHSOversharp(10,10,8).ConvertToY8().Invert
YToUV(U, V, y)
Weave
ConvertToyuy2(interlaced=true)
TComb(1)
import(AviSynthPluginsDir + "AnimeIVTC 2 mod.avs")
AnimeIVTC(1)
FixChromaBleedingMod(-2, 2, thr=4.0, f=false, xysh=true, bic=true, strength=1.0, opacity=1.0)
ConvertToyv12()
aWarpSharp4xx(depth=4,chroma=6).aWarpSharp4xx(depth=20,chroma=6).aWarpSharp4xx(depth=-2,chroma=6)
#~ vtoy


Better than nothing, but the problem still exists :(

[johnmeyer]

There have been several other posts in the past three months about similar issues. You might search those threads.

[real.finder]

There have been several other posts in the past three months about similar issues. You might search those threads.

I already did, and did not find what I want, Could you put their link please?

[real.finder]

I note chroma horizontal shift between ffms2 and L-SMASH Source

LWLibavVideoSource("D:\Toei_0_07-2_OP.avi", cache=false, dr=true).Crop(0,0,-16,0).AssumeBFF() # or even LWLibavVideoSource("D:\Toei_0_07-2_OP.avi", cache=false).AssumeBFF()
ConvertToyuy2(interlaced=true)

and

ffVideoSource("D:\Toei_0_07-2_OP.avi").AssumeBFF()

Mention that ffVideoSource out yuy2 but the source is yv411

[real.finder]

I think the Solution Key is the ghosting relationship between chroma and luma

so my try above not remove the most problem effect

in my mind some Ideas to make a horizontal luma mask and then shift it, but that seems not possible; and another one is to use MT_makediff in luma with the source and the filtered luma from ghosting and then use the output of MT_makediff in chroma with MT_adddiff, I didn't try that yet, but I think that If I skipped the different dimensions issue between chroma and luma, the probability of success is not big

[Reel.Deel]

Not sure if this will help or not but have you tried any of the ghost removal filters from the WarpSharp package (http://avisynth.nl/index.php/WarpSharp)?

[real.finder]

Not sure if this will help or not but have you tried any of the ghost removal filters from the WarpSharp package (http://avisynth.nl/index.php/WarpSharp)?

yes, it work in luma only and for temporary ghost and need both SearchGhost and EraseGhost to work

it is for VHF and UHF Signal I think, my cases is something different, it not temporary ghost, it Spatial

here some info to something similar to my cases http://forum.doom9.org/showthread.php?p=1715450#post1715450

[real.finder]

I find a solution with Camcorder color denoise http://acobw.narod.ru/


LWLibavVideoSource("D:\Toei_0_07-2_OP.avi", cache=false, dr=true).Crop(0,0,-16,0).AssumeBFF()
MergeLuma(last.ConvertToYv12.LGhost(1,4,80,2,20,2,3,4,-80).ConvertToYv411())
LoadVirtualDubPlugin("D:\ccd.vdf", "ccd", 0)
ConvertToRGB32(interlaced=true)
ccd(70,1)
ConvertToYV411(interlaced=true)
vToY
SeparateFields


or to avoid ConvertToRGB Issues


LWLibavVideoSource("D:\Toei_0_07-2_OP.avi", cache=false, dr=true).Crop(0,0,-16,0).AssumeBFF()
MergeLuma(last.ConvertToYv12.LGhost(1,4,80,2,20,2,3,4,-80).ConvertToYv411())

o=last

LoadVirtualDubPlugin("D:\ccd.vdf", "ccd", 0)
ConvertToRGB32(interlaced=true)
ccd(70,1)
ConvertToYV411(interlaced=true)

orgb=o.ConvertToRGB32(interlaced=true).ConvertToYV411(interlaced=true)

udif=mt_makediff(last.utoy8,orgb.utoy8)
vdif=mt_makediff(last.vtoy8,orgb.vtoy8)
u=mt_adddiff(udif,o.utoy8)
v=mt_adddiff(vdif,o.vtoy8)
YToUV(U, V, o.ConvertToY8)

vToY
SeparateFields


plus, I note something else in the source, chroma difference between the top field and bottom field, seems that this source has every illnesses :( anyway this fix it
SeparateFields()
Interleave(last.SelectEven.Tweak(4),last.SelectOdd)
Weave() after the source call

edit: ConvertToRGB32(interlaced=true) then ConvertToYV411(interlaced=true) it self reduce the problem, so in the 2nd script the problem still exist

so this is the 1st one with some changes

LWLibavVideoSource("D:\Toei_0_07-2_OP.avi", cache=false, dr=true).Crop(0,0,-16,0).AssumeBFF()
SeparateFields()
#Interleave(last.SelectEven.Tweak(4),last.SelectOdd)
Interleave(last.SelectEven,last.SelectOdd.Tweak(4))
Weave()
MergeLuma(last.ConvertToYv12.LGhost(1,4,80,2,20,2,3,4,-80).ConvertToYv411())
o=last
LoadVirtualDubPlugin("D:\ccd.vdf", "ccd", 0)
ConvertToRGB32(interlaced=true)
ccd(70,1)
ConvertToYV411(interlaced=true)
MergeLuma(o)

vToY
SeparateFields

[real.finder]

if anyone has this type of artifacts, I made something can deal with it, it's chromasidebleed() in the same script that has sanimebob()

[magiblot]

Thanks, but could you reupload the pictures? I don't know what the artifact looked like.

[real.finder]

Thanks, but could you reupload the pictures? I don't know what the artifact looked like.

done with archive link

and there are another one here https://forum.doom9.org/showpost.php?p=1715275&postcount=9

[tuanden0]

I have this problem too but with the textsub :(
When I hardsub the anime to watch on my TV or my tablet, the artifacts appear around the subtitles and the intro text in OP and ED :(
Can someone give me advice?

Source: http://i.imgur.com/UrP2tXw.png

After encode: http://i.imgur.com/lNleGp7.png

Here's my script:

SetMemoryMax(2048)
SetFilterMTMode("LSMASHVideoSource,TextSub,FFT3Dfilter",3)
SetFilterMTMode("gradfun2db",2)
LSMASHVideoSource("E:\abcxyz.mp4")
AssumeFPS(24000, 1001)
FFT3Dfilter(sigma=3.2,sigma2=2.4,sigma3=1.6,sigma4=0.8,bw=16,bh=16,ow=8,oh=8,bt=1,ncpu=4,sharpen=0.3).gradfun2db(thr=1.2)
TextSub("abcxyz.ass", 1)
Prefetch(4)


Here's my x264 setting on meGUI:
--level 4.1 --preset veryslow --tune animation --crf 26.0 --deblock -1:-1 --bframes 5 --ref 6

[blaze077]

Can someone give me advice?
Those seem to be compression artifacts caused due to your x264 settings. You might want to lower your CRF for better quality and those artifacts should be gone. 26 is a very high CRF value for anime so going lower would definitely benefit you.

[tuanden0]

@blaze077 :thanks: for your reply

My problem's solved, just decreasse AQ strength and Psy-rd :o Maybe some artifacts still there but the output look better :D

[Gordon at GTH]

I know this is an oldish thread but if anyone still has problems with Chroma Blur or what I called Colour Bleed (Horizontal) or Colour Droop (Vertical) then look here: http://www.gthelectronics.com/cobleed.htm or http://www.gthelectronics.com/codroop.htm. I now use and recommend Ffmpeg for correcting this and have put some batch files here: http://www.gthelectronics.com/ffmpeg.htm. These allow you to check the correct shift required and then process with end result of MP4 or MPEG-2 for a DVD. I am happy to answer any questions by email or here.