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Reasonable filtering of VHS capture?

Hi

Thanx for a great forum!

I'm setting up to capturing the old family VHS films. And chose the wifves work out video as a starter.
I bought a used JVC HM-DR10000EU (with line TBC) connected via s-video to a conexant polaris video USB-dongle in a win7x64 laptop. I'm captureing i Virtualdub with lagarith YUY2.

I was thinking of running the follwing avisynth-script to make it watchable on my 65" samsung. I tried having the tv doing the de interlacing in runtime but found deinterlacing looking better.

Code:

AviSource("VHS1.avi")  

ConvertToYV12(interlaced=true)  

AssumeTFF()

QTGMC(Preset="very Slow", EzDenoise=0.0, EdiThreads=1) #Preservefields=true?

Crop(12, 2, -16, -12) 

Levels(18, 1.02, 235, 16, 235, dither=true, coring=false) #try to use the complete 16->235 range

ColorYUV(off_u=+3, off_v=-3) #Checked some histograms and tried to adjust the colors

Tweak(hue=-3, sat=0.85, coring=false, dither=true)



#DeScratch()  

#Turnright().RemoveDirtMC_SE(GPU=false, radius=5, repmode=0, clmode=0, TwoPass=false, thSAD=35, thSADC=35).turnleft()



LSFmod(strength=130)  

#Stab(range=1, dxmax=1, dymax=1) #Thought I saw the video bump one line somewhere. Cant find it anymore

#prefetch(1)

AddBorders(12, 8, 10, 12)  

return last

1. There are some screatches/comets. Never really got to get rid of them without making it look too filtered. Any good ideas? Theres two in the samples

2. What level of luma noice /chroma noise filtering would you apply?
Would you filter for spots? There some.

3. I was thinking of getting an external frame TBC (panasonic DVR). Would it enhance this video?

4. Sample 23067 contains a weired aspect distorsion. The film is full of intentional effects to mek it look arty. Would you say that this is intentional? Or is it my VCR/tape that's bugging me?

Cheers!

About the warp sample, I'm guessing it's part of the film because it doesn't affected the added in subtitles, head switching noise and that the frame itself looks stable

What about question 1? I ca t seem to get rid om those transparent tears. Usually they are still for 1-2 frames. But this one moves. Do I need to replace the conplete frame?

Attached test script just to remove the comets. It uses RemoveDirtMC.avs, which I attached in case you don't have that. You may need to install more plugins to make RemoveDirtMC work. Also attached the resulting file in HuffYUV format.

I didn't notice any scratches/comets.

Generally, I avoid NR unless the noise is distracting, which it isn't in the three videos posted. The reason I avoid it is because it makes people look fake, which is worse than a little noise.

The warping in 23067 looks like a line-TBC issue, but the left edge of the video appears to be masked out so it's hard to tell for sure.

Quote:

Originally Posted by keaton (Post 101573)

Thank you so much!. I was running RemoveDirtMC after QTGMC and it wasn't working at all. You Clean-function cleared that for me.

My results was overall looking quite plastic. So I've been trying to cutback on filtering. Found someone here that played around with QTGMC and recommended:

Code:

QTGMC(TR0=2, TR1=2, TR2=1, Rep0=1, Rep1=0, Rep2=4, DCT=5, ThSCD1=300, ThSCD2=110, SourceMatch=3, Lossless=2, Sharpness=0.1, Sbb=0, MatchPreset="slow", NoiseProcess=2, GrainRestore=0.0, NoiseRestore=0.4, NoisePreset="slow", StabilizeNoise=false, NoiseTR=0, NoiseDeint="bob", Border=true)

I think it made a little difference.
Also tried w/o deinterlacing, but it looked terrible on my TV.
And then I decided that removedirtMC also added too much filtering, så I created a mask from its detections and included a threashold:

Code:

diff=mt_makediff(original, fixedclip, U=0, V=0).convertToY8().ConvertToYV12(interlaced=false)

diff=mt_lut(diff, expr="x 128 - abs").mt_expand(U=3, V=3).mt_expand(U=3, V=3).mt_expand(U=3, V=3)#.mt_expand(U=3, V=3)

mask=mt_lut(diff, expr="x 32 > 255 0 ?")# Binär mask

scale_h=8

scale_w=60

mask=mask.bicubicresize(mask.width/scale_w, mask.height/scale_h)

mask=mask.bicubicresize(mask.width*scale_w, mask.height*scale_h)

mask=mt_lut(mask, expr="x 14 *")

fixedclip = mt_Merge(original, fixedclip, mask)

I think it helped a little.The mask looks like this: The grey is what RemovedirtMC changed, and the black is the threasholded mask created

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