[HELP] AviSynth 32 bit - ColorMatrix filter not working for video?

[Selur]

When using '709->601' conversion Hybrid uses:

ClearAutoloadDirs()
SetFilterMTMode("DEFAULT_MT_MODE", MT_MULTI_INSTANCE)
LoadCPlugin("I:\Hybrid\32bit\AVISYN~1\ffms2.dll")
LoadPlugin("I:\Hybrid\32bit\AVISYN~1\ColorMatrix.dll")
# loading source: F:\TestClips&Co\files\test FFMEG.avi
#  color sampling YV12@8, matrix: bt601, scantyp: progressive, luminance scale: limited
FFVideoSource("F:\TESTCL~1\files\TESTFF~1.AVI",cachefile="E:\Temp\avi_6699eed53e91d42d0c14a1d0daf52a2f_853323747_1_0.ffindex",fpsnum=25,colorspace="YV12")
# current resolution: 640x352
# color modifications
ColorMatrix(mode="Rec.709->Rec.601",interlaced=false,hints=false)
# filtering
# adjust color to RGB32 (for preview)
ConvertToRGB32(matrix="Rec601")
PreFetch(8)
return last

when not using the color matrix conversion, Hybrid used:

ClearAutoloadDirs()
SetFilterMTMode("DEFAULT_MT_MODE", MT_MULTI_INSTANCE)
LoadCPlugin("I:\Hybrid\32bit\AVISYN~1\ffms2.dll")
# loading source: F:\TestClips&Co\files\test FFMEG.avi
#  color sampling YV12@8, matrix: bt601, scantyp: progressive, luminance scale: limited
FFVideoSource("F:\TESTCL~1\files\TESTFF~1.AVI",cachefile="E:\Temp\avi_6699eed53e91d42d0c14a1d0daf52a2f_853323747_1_0.ffindex",fpsnum=25,colorspace="YV12")
# current resolution: 640x352
# filtering
# adjust color to RGB32 (for preview)
ConvertToRGB32(matrix="Rec601")
PreFetch(8)
return last

as preview scripts.

To check whether something changes I:

• enabled "Filtering->Avisynth->Filter view"
  
• enabled "Filtering->Avisynth->Misc->FiterView->SplitView"
  
• selected "Filtering->Avisynth->Misc->FiterView->SplitView->Placement->interleaved"
  

this way I can switch between an unfiltered and a filter view.
-> seems to be working

After this (which made it easier to spot the changed of the color matrix) I disabled "Filtering->Avisynth->Filter view" and then looked at the changes, when en- and disabling 'ColorMatrix' while it was set to '709->601'.
-> knowing what to look for the changed where there

=> can't reproduce the problem.

Cu Selur