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[HELP] Help with VHS upscale - Printable Version

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RE: Help with VHS upscale - Selur - 18.06.2022

Sorry, mixed up threads. Wink

RE: Help with VHS upscale - Miranda - 18.06.2022

I just sent you a sample via PM.

RE: Help with VHS upscale - Selur - 18.06.2022

Looked at it.
  • 4:1:1 -> argh
  • there are two types of ghosting I see
    • ghosting/blending around scene changes which seem like intended blends since they some times last over a few frames
    • ghosting the scene with the guy and the knife cutting the robe
    Sadly for both cases, I have no clue how to get rid of these. Folks over at videohelp might be able to help since they got way more experience filtering vhs captures than I do. Smile

    Cu Selur


RE: Help with VHS upscale - Miranda - 18.06.2022

As I thought, it's not a good tape.  Sad

There was actually a UK PAL VHS released back in the 1990s, but it is impossible to find.

RE: Help with VHS upscale - Selur - 18.06.2022

Especially the ghosting at the scene changes seem like intentional crossfading at least on some scenes.

RE: Help with VHS upscale - Selur - 21.06.2022

Using ExBlend (https://forum.doom9.org/showthread.php?t=175948) works nice.
Sadly there are no plans to port it to Vapoursynth atm. Sad
So to properly do it I would first use Avisynth with ExBlend and export it to a lossless format and then filter with DPIR or a similar strong area cleaner and through Vapoursynth. The attached sample was created with Avisynth ExBlend and mclean, just as a proof of concept.
For those interessted here's also the script i used:
ClearAutoloadDirs() SetFilterMTMode("DEFAULT_MT_MODE", MT_MULTI_INSTANCE) LoadPlugin("I:\Hybrid\64bit\Avisynth\AVISYN~1\LoadDll.dll") LoadDLL("I:\Hybrid\64bit\Avisynth\avisynthPlugins\libfftw3f-3.dll") LoadPlugin("I:\Hybrid\64bit\Avisynth\AVISYN~1\DGDecodeNV.dll") LoadPlugin("I:\Hybrid\64bit\Avisynth\AVISYN~1\manyPlus.dll") LoadPlugin("I:\Hybrid\64bit\Avisynth\AVISYN~1\FFT3DFilter.dll") LoadPlugin("I:\Hybrid\64bit\Avisynth\AVISYN~1\neo-f3kdb.dll") LoadPlugin("I:\Hybrid\64bit\Avisynth\AVISYN~1\masktools2.dll") LoadPlugin("I:\Hybrid\64bit\Avisynth\AVISYN~1\mvtools2.dll") LoadPlugin("I:\Hybrid\64bit\Avisynth\AVISYN~1\AutoAdjust.dll") LoadPlugin("I:\Hybrid\64bit\Avisynth\AVISYN~1\aWarpSharpMT.dll") LoadPlugin("I:\Hybrid\64bit\Avisynth\AVISYN~1\RgTools.dll") Import("I:\Hybrid\64bit\Avisynth\avisynthPlugins\mtmodes.avsi") Import("I:\Hybrid\64bit\Avisynth\avisynthPlugins\Zs_RF_Shared.avsi") Import("I:\Hybrid\64bit\Avisynth\avisynthPlugins\mClean.avs") # loading source: E:\clips\Courage the Cowardly Dog S02E17E18 SOURCE.mkv LoadPlugin("c:\Users\Selur\Desktop\ExBlend_x64.dll") LoadPlugin("C:\Users\Selur\Desktop\RT_Stats_x64.dll") Import("I:\Hybrid\64bit\Avisynth\avisynthPlugins\mClean.avs") Import("I:\Hybrid\64bit\Avisynth\avisynthPlugins\mtmodes.avsi") # loading source: E:\clips\Courage the Cowardly Dog S02E17E18 SOURCE.mkv # color sampling YV12@8, matrix: bt709, scantyp: progressive, luminance scale: limited DGSource(dgi="E:\Temp\mkv_ae71be80b1642ad5291d33db23176b8a_853323747.dgi",fieldop=2) # current resolution: 720x480 # filtering ORG=Last TMP=ORG TMP.Exblend(mode=1, ExBfile=".\Exbfile", debug=true, lv=5, dv=5) #return last Return Pass 1 RT_ForceProcess() TMP=0 # kill TMP clip and call ExBlend filter destructor ORG SHOW=0 Exblend(mode=2,ExBfile=".\Exbfile",Decimate=False,Disp=1,Show=SHOW) # Non decimated, Blend pair replaced with 2 x copies of ex-blended frame. Little colored block flags ex-Blended frame pair. #Exblend(mode=2,ExBfile=".\Exbfile") # Deblended & Decimated mClean(thSAD=800,rn=1) # Both below lines for Non Decimated ONLY. #StackHorizontal(ORG,Last) #Subtract(ORG,Last) Return last

Cu Selur

RE: Help with VHS upscale - Miranda - 21.06.2022

Will this also work on the shot on video movie clip I sent over?

RE: Help with VHS upscale - Selur - 21.06.2022

Argh,... sorry, posted to the wrong thread again.
But acctually it might work,.. -> I'll give it a try and report back. Smile

RE: Help with VHS upscale - Miranda - 21.06.2022

Thanks. I've not actually used AVIsynth with scripts before. Confused

RE: Help with VHS upscale - Selur - 21.06.2022

It works somewhat in some scenes,..

ExBlend + mclean
[Image: one.png]
[Image: two.png]
if you don't know about Avisynth scripting it might not be worth the effort,..

Cu Selur