Avisynth preview error:

[Selur]

ClearAutoloadDirs() LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\LoadDll.dll") LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\AddGrainC.dll") LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\dfttest.dll") LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\EEDI2.dll") LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\eedi3.dll") LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\FFT3DFilter.dll") LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\masktools2.dll") LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\mvtools2.dll") LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\TDeint.dll") LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\VerticalCleanerSSE2.dll") LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\RgTools.dll") LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\MedianBlur2.dll") LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\nnedi3.dll") LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\nnedi2.dll") LoadCPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\yadif.dll") LoadDLL("C:\Program Files\Hybrid\32bit\avisynthPlugins\libfftw3f-3.dll") Import("C:\Program Files\Hybrid\32bit\avisynthPlugins\QTGMC.avsi") Import("C:\Program Files\Hybrid\32bit\avisynthPlugins\SMDegrain.avsi") Import("C:\Program Files\Hybrid\32bit\avisynthPlugins\Zs_RF_Shared.avsi") LoadCPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\ffms2.dll") SetFilterMTMode("DEFAULT_MT_MODE", MT_MULTI_INSTANCE) # loading source: D:\Video\UNNAMED DISC\2006 - Udo Music Festival Fuji Speedway.mkv # input color sampling YV12@8, matrix:Rec.709, scantyp: top field first # input luminance scale tv Source = FFVideoSource("D:\Video\UNNAMED DISC\2006 - Udo Music Festival Fuji Speedway.mkv",cachefile="C:\Windows\Temp\mkv_a465d645c614698d0466fbe84c48ae4a_853323747_1_0.ffindex",fpsnum=30000,fpsden=1001,colorspace="YV12") # cutting from 207 with 112661 frames - WARNING: This might cause synch issues Source = Source.Trim(207, 112454) # current resolution: 720x480 # deinterlacing SourceFiltered = Source Source = Source.AssumeTFF() Source = Source.QTGMC(Preset="Slow", InputType=0, TR2=1, Sharpness=1.0, SourceMatch=0, Lossless=2, ediThreads=2, FPSDivisor=2, PrevGlobals="Reuse")# added PrevGlobals="Reuse" to handle multiple QTGMC instances SourceFiltered = SourceFiltered.AssumeTFF() SourceFiltered = SourceFiltered.QTGMC(Preset="Slow", InputType=0, TR2=1, Sharpness=1.0, SourceMatch=0, Lossless=2, ediThreads=2, FPSDivisor=2, PrevGlobals="Reuse")# added PrevGlobals="Reuse" to handle multiple QTGMC instances # cropping Source = Source.Crop(2,58,-6,-58) SourceFiltered = SourceFiltered.Crop(2,58,-6,-58)# 712x364 # filtering # scaling to 712x412 Source = Source.BicubicResize(712,412) SourceFiltered = SourceFiltered.nnedi3_rpow2(rfactor=2,cshift="GaussResize",fwidth=712,fheight=412) Source = Source.ColorYUV(analyze=true) SourceFiltered = SourceFiltered.ColorYUV(analyze=true) # stacking horizontal for filter preview # adjust color to RGB32 SourceFiltered = SourceFiltered.ConvertToRGB32(matrix="Rec601") # adjust color to RGB32 Source = Source.ConvertToRGB32(matrix="Rec601") StackHorizontal(Source, SourceFiltered) PreFetch(6) return last

Script looks fine to me.
Similar script:

ClearAutoloadDirs() LoadPlugin("I:\Hybrid\32bit\AVISYN~1\LoadDll.dll") LoadPlugin("I:\Hybrid\32bit\AVISYN~1\DGDecodeNV.dll") LoadPlugin("I:\Hybrid\32bit\AVISYN~1\AddGrainC.dll") LoadPlugin("I:\Hybrid\32bit\AVISYN~1\dfttest.dll") LoadPlugin("I:\Hybrid\32bit\AVISYN~1\EEDI2.dll") LoadPlugin("I:\Hybrid\32bit\AVISYN~1\eedi3.dll") LoadPlugin("I:\Hybrid\32bit\AVISYN~1\FFT3DFilter.dll") LoadPlugin("I:\Hybrid\32bit\AVISYN~1\masktools2.dll") LoadPlugin("I:\Hybrid\32bit\AVISYN~1\mvtools2.dll") LoadPlugin("I:\Hybrid\32bit\AVISYN~1\TDeint.dll") LoadPlugin("I:\Hybrid\32bit\AVISYN~1\VerticalCleanerSSE2.dll") LoadPlugin("I:\Hybrid\32bit\AVISYN~1\RgTools.dll") LoadPlugin("I:\Hybrid\32bit\AVISYN~1\MedianBlur2.dll") LoadPlugin("I:\Hybrid\32bit\AVISYN~1\nnedi3.dll") LoadPlugin("I:\Hybrid\32bit\AVISYN~1\nnedi2.dll") LoadCPlugin("I:\Hybrid\32bit\AVISYN~1\yadif.dll") LoadDLL("I:\Hybrid\32bit\avisynthPlugins\libfftw3f-3.dll") Import("I:\Hybrid\32bit\avisynthPlugins\QTGMC.avsi") Import("I:\Hybrid\32bit\avisynthPlugins\SMDegrain.avsi") Import("I:\Hybrid\32bit\avisynthPlugins\Zs_RF_Shared.avsi") SetFilterMTMode("DEFAULT_MT_MODE", MT_MULTI_INSTANCE) # loading source: F:\TestClips&Co\files\interlaceAndTelecineSamples\interlaced\burosch1.mpg # input color sampling YV12@8, matrix:Rec.709, scantyp: bottom field first # input luminance scale tv DGSource(dgi="E:\Temp\mpg_9f66a10dd7c34fcf28a5513f1347c0b5_853323747.dgi",fieldop=2) # current resolution: 720x576 # deinterlacing AssumeBFF() QTGMC(Preset="Slow", InputType=0, TR2=1, Sharpness=1.0, SourceMatch=0, Lossless=2, ediThreads=2) SelectEven() # cropping Crop(2,58,-6,-58)# 712x460 # filtering # scaling to 712x412 # using lanczos resize instead of nnedi3 since needi3 can only be used for upscaling LanczosResize(712,412) PreFetch(8) return last

works fine here without a problem.

Might be a problem with the source filter having problems with the source.
-> I would suggest trying a different source filter,

Cu Selur