[BUG] Filter: Line/Darken (GLSL-A4K) = defective

[Selur]

According to the debug output, FastLineDarkenMOD was used,...

# Imports import ctypes import sys import os import vapoursynth as vs # using Vapoursynth R79 # getting Vapoursynth core core = vs.core # Import scripts folder scriptPath = 'C:/Program Files/Hybrid/64bit/vsscripts' sys.path.insert(0, os.path.abspath(scriptPath)) # Loading Support Files Dllref = ctypes.windll.LoadLibrary("C:/Program Files/Hybrid/64bit/vsfilters/Support/libfftw3f-3.dll") # loading plugins core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/vsfilters/DenoiseFilter/NEO_FFT3DFilter/neo-fft3d.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/vsfilters/DenoiseFilter/DFTTest/DFTTest.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/Vapoursynth/Lib/site-packages/vapoursynth/plugins2/bwdif.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/Vapoursynth/Lib/site-packages/vapoursynth/plugins2/fmtconv.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/Vapoursynth/Lib/site-packages/vapoursynth/plugins2/znedi3.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/Vapoursynth/Lib/site-packages/vapoursynth/plugins2/sneedif/libsneedif.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/Vapoursynth/Lib/site-packages/vapoursynth/plugins2/eedi3m.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/Vapoursynth/Lib/site-packages/vapoursynth/plugins2/vszip/vszip.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/Vapoursynth/Lib/site-packages/vapoursynth/plugins2/addnoise.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/Vapoursynth/Lib/site-packages/vapoursynth/plugins2/mvutensils/mvutensils.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/Vapoursynth/Lib/site-packages/vapoursynth/plugins2/akarin/libakarin.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/Vapoursynth/Lib/site-packages/vapoursynth/plugins2/zsmooth/zsmooth.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/vsfilters/SourceFilter/d2vSource/DGDecode.dll") # Import scripts import linedarken import qtgmc import validate # Source: 'S:\youtube_temp\KHG-Abi-1996_Teil-2-Kurioses.mpg' # clip current meta; color space: YUV420P8, bit depth: 8, resolution: 720x576, fps: 25, color matrix: 470bg, color primaries: Unspecific, color transfer: BT.601, yuv luminance scale: limited, scanorder: top field first, full height: true (Source) # Loading 'S:\youtube_temp\KHG-Abi-1996_Teil-2-Kurioses.mpg' using DGDecode clip = core.dgdecode.MPEG2Source("D:/temp_hybrid/mpg_89c1c02461a1f11c770077d6e8011af2_853323747.d2v",info=3)# 25 fps, scanorder: top field first frame = clip.get_frame(0) # setting color matrix to 470bg. clip = core.std.SetFrameProps(clip, _Matrix=vs.MATRIX_BT470_BG) # setting color transfer (vs.TRANSFER_BT601), if it is not set. if validate.transferIsInvalid(clip): clip = core.std.SetFrameProps(clip=clip, _Transfer=vs.TRANSFER_BT601) # setting color primaries info (to vs.PRIMARIES_BT470_BG), if it is not set. if validate.primariesIsInvalid(clip): clip = core.std.SetFrameProps(clip=clip, _Primaries=vs.PRIMARIES_BT470_BG) # setting color range to TV (limited) range. prop_name = '_Range' if core.core_version.release_major >= 74 else '_ColorRange' clip = core.std.SetFrameProps(clip=clip, **{prop_name: vs.RANGE_LIMITED}) # making sure frame rate is set to 25fps clip = core.std.AssumeFPS(clip=clip, fpsnum=25, fpsden=1) # making sure the detected scan type is set (detected: top field first) clip = core.std.SetFrameProps(clip=clip, _FieldBased=vs.FIELD_TOP) # scan type: top field first # Deinterlacing using QTGMC clip = qtgmc.QTGMC(clip, Preset="Fast", TFF=True) # new fps: 50 # Making sure content is perceived as frame based clip = core.std.SetFrameProps(clip=clip, _FieldBased=vs.FIELD_PROGRESSIVE) # scan type: progressive clip = clip[::2] # selecting previously even frames, new fps: 25 # Using FastLineDarkenMOD for line darkening clip = linedarken.FastLineDarkenMOD(clip) # adjusting output color from YUV420P8 to YUV420P10 for NVEncModel clip = core.resize.Bicubic(clip=clip, format=vs.YUV420P10) # adjusted resizing to achieve PAR 1:1 for preview # resizing for preview to square pixel to 768x576 clip = core.resize.Bicubic(clip=clip, width=768, height=576) # set output frame rate to 25fps (progressive) clip = core.std.AssumeFPS(clip=clip, fpsnum=25, fpsden=1) # output clip.set_output() # clip current meta; color space: YUV420P10, bit depth: 10, resolution: 768x576, fps: 25, color matrix: 470bg, color primaries: Unspecific, color transfer: BT.601, yuv luminance scale: limited, scanorder: progressive, full height: true (Meta) # script was created by Hybrid 2026.08.21.1

Both FastLineDarkenMOD and "Darken (GLSL-A4K)" work fine here.

Cu Selur