QTGMC (deinterlace problem)

[rgr]

How to avoid effects like in the screenshot when using QTGMC?

Right side - QTGMC
Left side = bwdif

Script:

QTGMC(preset="slow",TR2=3, Sharpness=1.2, SLMode=1)

(removing Sharpness and SLMode improves the thing, but I would not like to give up sharpening)

(full screenshot attached)

[lollo]

Use QTGMC as deinterlacer "only", and sharpen later with a dedicated filter (general good approach)

[Sharc]

^^^ This
Or try an antialias filter like santiag()

Also take a look at the discussion here:
https://forum.videohelp.com/threads/404164-Why-is-QTGMC-so-destructive-and-why-do-so-m...l-recommend-it

[rgr]

Use QTGMC as deinterlacer "only", and sharpen later with a dedicated filter (general good approach)

Which would you recommend? ASharp didn't work for me.

[lollo]

Which would you recommend? ASharp didn't work for me.

LSFmod(defaults="slow")

As alternative, according to the characteristics of your source: SeeSaw() http://avisynth.nl/index.php/SeeSaw, CAS() http://avisynth.nl/index.php/CAS

[rgr]

Which would you recommend? ASharp didn't work for me.

LSFmod(defaults="slow")

As alternative, according to the characteristics of your source: SeeSaw() http://avisynth.nl/index.php/SeeSaw, CAS() http://avisynth.nl/index.php/CAS

Thanks. It's a bit weak that LFSmod and SeeSaw only accept YUV420...

[lollo]

Which would you recommend? ASharp didn't work for me.

LSFmod(defaults="slow")

As alternative, according to the characteristics of your source: SeeSaw() http://avisynth.nl/index.php/SeeSaw, CAS() http://avisynth.nl/index.php/CAS

Thanks. It's a bit weak that LFSmod and SeeSaw only accept YUV420...

Yes, the conversion to YV12() is sort of degradation sometime. Didée disappeared long time ago before improving his scripts .

In any case, if you are deinterlacing your source and you want to sharpen only luma (which happens quite often) is not a big issue, because you can recover the chroma from a step prior to sharpening (and then to YV12() conversion):

# deinterlacing
deinterlaced=...

### convert to YV12
deinterlaced_yv12=deinterlaced.convertToYV12()

### sharpening
sharpened_yv12=deinterlaced_yv12.LSFmod(defaults="slow")

### convert to YUY2 with chroma from YUY2 color space
sharpened=sharpened_yv12.convertToYUY2().MergeChroma(deinterlaced)

[Selur]

It's a bit weak that LFSmod and SeeSaw only accept YUV420...

LSFmod works fine with other yuvxxx color spaces, iirc. the restriction to YV12 was only because older masktools2 versions didn't support other color spaces.
Using:

ClearAutoloadDirs()
SetFilterMTMode("DEFAULT_MT_MODE", MT_MULTI_INSTANCE)
LoadPlugin("F:\Hybrid\64bit\Avisynth\avisynthPlugins\LoadDll.dll")
LoadDLL("F:\Hybrid\64bit\Avisynth\avisynthPlugins\libfftw3f-3.dll")
LoadPlugin("F:\Hybrid\64bit\Avisynth\avisynthPlugins\LSMASHSource.dll")
LoadPlugin("F:\Hybrid\64bit\Avisynth\avisynthPlugins\masktools2.dll")
LoadPlugin("F:\Hybrid\64bit\Avisynth\avisynthPlugins\VariableBlur.dll")
LoadPlugin("F:\Hybrid\64bit\Avisynth\avisynthPlugins\aWarpSharpMT.dll")
LoadPlugin("F:\Hybrid\64bit\Avisynth\avisynthPlugins\RgTools.dll")
Import("F:\Hybrid\64bit\Avisynth\avisynthPlugins\mtmodes.avsi")
Import("F:\Hybrid\64bit\Avisynth\avisynthPlugins\Zs_RF_Shared.avsi")
Import("F:\Hybrid\64bit\Avisynth\avisynthPlugins\ExTools.avsi")
Import("F:\Hybrid\64bit\Avisynth\avisynthPlugins\LSFmod.avsi")
# loading source: G:\TestClips&Co\files\test.avi
# color sampling YV12@8, matrix: bt601, scantyp: progressive, luminance scale: limited
LWLibavVideoSource("G:\TestClips&Co\files\test.avi",cache=false,dr=true,format="YUV420P8", prefer_hw=0)
ConvertToYUV444()
# current resolution: 640x352
LSFmod(edgemaskHQ=true)
ConvertToYUV422()
# current resolution: 640x352
LSFmod(edgemaskHQ=true)
ConvertToYUV420()
# current resolution: 640x352
LSFmod(edgemaskHQ=true)
# Converting from 8 to 10bit for encoder
ConvertBits(10)
# setting output fps to 25.000fps
AssumeFPS(25,1)
PreFetch(16)
#  output: color sampling YV12@10, matrix: bt601, scantyp: progressive, luminance scale: limited
return last

(4:2:0, 4:2:2, 4:4:4) works fine here. (script doesn't make any sense, I just wanted to test the color compatibility; I suspect the same might be true for SeeSaw)

Cu Selur

[poisondeathray]

And for seesaw - there are modified versions that accept high bit depth and other subsampling by realfinder and dogway

https://github.com/realfinder/AVS-Stuff/blob/master/avs%202.5%20and%20up/seesaw.avsi
https://github.com/Dogway/Avisynth-Scripts/blob/master/MIX%20mods/SharpenersPack.avsi


Was there motion in adjacent fields ? One scenario where BWDIF excels over other deinterlacers is weaving static content