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Old 6th September 2011, 19:31   #1  |  Link
Dogway
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Posts: 1,041
Scanlines on interlaced source

Hello, I ripped a DVD guide of a game, it is interlaced so I thought on using QTGMC, but it was slow and results were far from desired. Then I thought about adding scanlines, and I think I'm almost there (I'm still open to suggestions), but the main concern is about the bob-flicker and certain "jumps" every few seconds, is this supposed to be correct?

Now after testing a bit it seems these "jumps" are something related to mpc-hc. I used a simple bob() and in avspmod there's flicker, then I preview the script in mpc-hc and even by frameskipping there's no flicker...

source 9Mb:
http://www.mediafire.com/?mfci31cc4uwzenj


Code:
separatefields
Deblock_QED(quant1=30, quant2=40)
LSFmod(defaults="slow",strength=50,edgemode=0,soothe=true,ss_x=1.0,ss_y=1.0)
raw=last
weave(interleave(last,mt_lut("26",u=2,v=2)))
SmoothContrast(0.2,sat=0,limit=true)
LumaMask(SmoothLevels(16,1.2,235,16,235,smooth=10,show=false,dither=100,limiter=0),raw.bob,black=64, white=255, brightfilt=false,show=false)
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Old 6th September 2011, 20:10   #2  |  Link
creaothceann
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If you're adding scanlines you can just throw away half the lines:

Code:
AssumeFrameBased.AssumeTFF.SeparateFields
SelectEven
Weave(Interleave(last, BlankClip(last)))

Last edited by creaothceann; 6th September 2011 at 20:31. Reason: oops, didn't know that!
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Old 6th September 2011, 20:17   #3  |  Link
Dogway
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Well, that's practically the same I just did, but removing selecteven (every field is unique), and adding some nice effects for scanline blending...
But the question is about bob-flicker, your code also shows the flicker.... is this ok?
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Old 6th September 2011, 20:24   #4  |  Link
Gavino
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Quote:
Originally Posted by creaothceann View Post
... BlankClip(last, last.FrameCount) ...
Note that BlankClip(last) already inherits the framecount, along with all the other properties of 'last'.
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Old 7th September 2011, 10:22   #5  |  Link
Dogway
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well, I guess that if I want to get rid of the bob-flicker I'd need to use a motion compensated (qtgmc). At last I used Didée's code in this thread, so I don't have to use "weave" which causes the flicker. Result is not so as authentic but at least it's not so tiring to watch.

Code:
separatefields
Deblock_QED(quant1=30, quant2=40)
LSFmod(defaults="slow",strength=50,edgemode=0,soothe=true,ss_x=1.0,ss_y=1.0)
weave
QTGMC(tr2=3,preset="very slow",Lossless=2,sourcematch=3,sharpness=0.3,MatchEnhance=0.3,MatchPreset="Slow", MatchPreset2="Slow")
raw=last
scanrate=2
mt_lutxy(mt_lutspa(relative=false,expr="y "+string(scanrate)+" % 0.01 < 16 235 ?")  ,"x 16 - y 16 - * 219 / 16 +",U=2,V=2)
SmoothContrast(0.2,sat=0,limit=true)
LumaMask(SmoothLevels(16,1.2,235,16,235,smooth=10,show=false,dither=100,limiter=0),raw,black=64, white=255, brightfilt=false,show=false)
RatioResize(4320/4739.0,"par")




If anyone has any tip, I'd be very welcome. Still I haven't figured out why the bobbed source showed different in mpc-hc.


btw, for the people who wants to know how is the infix of RPN equations, or the opposite so you can modify it, use the next code (yes, don't know how I didn't try before):

Code:
a = mt_infix("y 2 % 0.01 < 16 235 ?")
# use mt_polish() for converting to polish notation from infix syntax
blankclip(length=1,width=1000,height=40)
subtitle(string(a),x=30,y=10)


EDIT: I refined and optimized the code a bit in the scanline creation lines and blending. I just tested over a raw screenshot:

Code:
PointResize(width,height*2)
LinearResize(576,height,linear=false,kernel="spline64",fh=1.0,fv=1.0,lsb_out=true)
r=selectevery(3,0)
g=selectevery(3,1)
b=selectevery(3,2)
Dither_convert_rgb_to_yuv(r,g,b,tv_range=true,lsb=false,mode=6,ampn=0.0,output="yv12")
mergeluma(blur(0.3,0.6))
raw=last

strength=128
scanrate=2
mt_lutxy(mt_lutspa(relative=false,expr="y "+string(scanrate)+" % 0.01 < "+string(strength)+" 235 ?"),"x 16 - y 16 - * 219 / 16 +",U=2,V=2)

# you can replace the next 2 lines with mt_merge(raw,raw.greyscale) for 8 bits merging
Dither_convert_8_to_16()
Dither_merge16_8(raw.Dither_convert_8_to_16(),raw.greyscale)

# Use ditherpost() for video or next line for RGB (still images)
Dither_convert_yuv_to_rgb(tv_range=true,output="rgb32",lsb_in=true,mode=6,ampn=0.0)

Last edited by Dogway; 8th September 2011 at 18:52.
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