AVS preview won't load

[Selur]

If the preview does not work, neither will the encoding.

ClearAutoloadDirs()
SetFilterMTMode("DEFAULT_MT_MODE", MT_MULTI_INSTANCE)
LoadPlugin("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\ColorMatrix64.dll")
LoadPlugin("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\CAS.dll")
LoadPlugin("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\MedianBlur2.dll")
LoadPlugin("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\dither.dll")
LoadPlugin("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\Deblock.dll")
LoadPlugin("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\DctFilter.dll")
LoadPlugin("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\nnedi3.dll")
LoadPlugin("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\neo-fft3d.dll")
LoadPlugin("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\mvtools2.dll")
LoadPlugin("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\masktools2.dll")
LoadPlugin("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\RgTools.dll")
Import("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\mtmodes.avsi")
Import("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\SMDegrain.avsi")
Import("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\Deblock_QED_MT2.avsi")
Import("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\Zs_RF_Shared.avsi")
Import("C:\Program Files\Hybrid\64bit\Avisynth\avisynthPlugins\QTGMC.avsi")
# loading source: C:\Users\Computer\Videos\RJ videos\Misc\VDub\VDub test\VHS\(1999) The Haakonsen Faktor.avi
# color sampling YUY2@8, matrix: bt601, scantyp: top field first, luminance scale: limited
AviSource("C:\Users\Computer\Videos\RJ videos\Misc\VDub\VDub test\VHS\(1999) The Haakonsen Faktor.avi")
# current resolution: 720x480
# color modifications
ColorMatrix(mode="Rec.601->Rec.709",clamp=3,interlaced=true,hints=false)
# deinterlacing
AssumeTFF()
QTGMC(Preset="Very Slow", ediThreads=8)
# cropping
Crop(16,0,-6,-4)# 698x476
Deblock_QED()
ConvertToYV12(interlaced=false)
SMDegrain(interlaced=false)
# scaling to 1620x1080
LanczosResize(1620,1080)
CAS(sharpness=1.00)
# adjust color to RGB32 (color matrix: Rec709)
ConvertToRGB32(matrix="Rec709")
# setting output fps to 59.940fps
AssumeFPS(60000,1001)
PreFetch(16)
#  output: color sampling RGB32@8, matrix: Rec.709, scantyp: progressive, luminance scale: limited
return last

seems, like a bug with QTGMC 'very slow' when processing YUY2 content.
When using LWLibavVideoSource with YUV422P8 it works fine.
I will look into it.

Cu Selur