[Selur]

Encoding call:

"C:\PROGRA~1\Hybrid\ffmpeg_32.exe" -y -loglevel fatal -threads 8 -i "C:\Users\Administrator\AppData\Local\Temp\2\encodingTempSynthSkript_19_58_47_5210.avs" -an -sn  -vsync 0 -pix_fmt yuv420p  -f rawvideo - | "C:\PROGRA~1\Hybrid\x264.exe" --preset superfast --pass 1 --bitrate 2048 --profile high --level 4.1 --direct auto --qcomp 0.5 --slices 4 --aq-mode 0 --sar 40:33 --non-deterministic --range tv --stats "C:\Users\ADMINI~1\AppData\Local\Temp\2\Lethal_Weapon_2_t01_new_19_58_47_5210_06.stats" --demuxer raw --input-depth 8 --input-res 1280x646 --input-csp i420 --fps 24000/1001 --output NUL -

looks fine, Avisynth script:

SetMemoryMax(1536)
SetMTMode(5,8) # change MT mode
LoadPlugin("C:\PROGRA~1\Hybrid\AVISYN~1\LoadDll.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\AVISYN~1\LSMASHSource.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\AVISYN~1\dfttest.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\AVISYN~1\RgTools.dll")
LoadDll("C:\PROGRA~1\Hybrid\AVISYN~1\fftw3.dll")
# loading source: D:\bd\Lethal_Weapon_2_t01.mkv
#  input luminance scale tv
LWLibavVideoSource("D:\bd\Lethal_Weapon_2_t01.mkv",cache=false,stacked=true,format="YUV420P8",repeat=true)
# current resolution: 1920x1080
SetMTMode(2) # change MT mode
# cropping to 1920x800
Crop(0,140,0,-140)
# current resolution: 1920x800 
# denoising using dfttest
dfttest()
# grain handling
Removegrain()
# scaling
Spline36Resize(1280,646)
distributor()
return

looks fine, no QTGMC used (source is progressive so no deinterlacing needed).
Videosource is VC-1/WVC1. Disable 'Avisynth->Filtering->Misc->LibavVideoSource instead of FFmpegSource', enabled 'Avisynth->Filtering->Misc->Support FRIM' and check the Avisynth script in Hybrid to see if Hybrid uses FRIM and whether that helps with the decoding problem.
Also if you can reproduce the problem with a small sample, it would help if you can share that sample with me so that I can try whether this also happens here.
You can also try, whether enabling 'Avisynth->Filtering->Misc->Force DirectShowSource' helps. Remember to check the Avisynth Preview, it the preview doesn't work or shows those Problems the encoding will too, so no reason to encode then.
Sadly since you don't have any card in your system that could be used for video decoding, that option is useless.
-> If neither FRIM or DirectShowSource helps the problem might be that no available decoder can handle the source. (sadly there is nothing I can do about that)

Cu Selur