Restoring badly digitized VHS

[Selur]

To me, 4-weave doesn't really seem stable, but I agree the text is not broken.
That said, I too would have expected for your code to work, but I suspect somewhere ffmpeg does some interpolation, so upscaling before Stab and downscaling afterwards:

# Imports import vapoursynth as vs # getting Vapoursynth core import ctypes import sys import os core = vs.core # Limit frame cache to 48473MB core.max_cache_size = 48473 # Import scripts folder scriptPath = 'F:/Hybrid/64bit/vsscripts' sys.path.insert(0, os.path.abspath(scriptPath)) # Loading Support Files Dllref = ctypes.windll.LoadLibrary("F:/Hybrid/64bit/vsfilters/Support/libfftw3f-3.dll") # loading plugins core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/Support/libmotionmask.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/ColorFilter/Retinex/Retinex.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/Support/vszip.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/DenoiseFilter/CTMF/CTMF.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/Support/TCanny.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/Support/libfillborders.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/Support/libtemporalmedian.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/DenoiseFilter/Cnr2/libcnr2.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/SharpenFilter/MSmooth/libmsmoosh.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/FrameFilter/ReduceFlicker/ReduceFlicker.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/GrainFilter/AddGrain/AddGrain.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/DenoiseFilter/NEO_FFT3DFilter/neo-fft3d.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/DenoiseFilter/DFTTest/DFTTest.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/Support/EEDI3m_opencl.dll")# vsQTGMC core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/ResizeFilter/nnedi3/NNEDI3CL.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/Support/fmtconv.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/DeinterlaceFilter/Bwdif/Bwdif.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/Support/akarin.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/SourceFilter/DGDecNV/DGDecodeNV_AVX2.dll") # defining beforeDeCross-function - START def beforeDeCross(clip): core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/MiscFilter/MiscFilters/MiscFilters.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/DenoiseFilter/ZSmooth/zsmooth.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/Support/libmvtools.dll") core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/Support/DePan.dll") import stabilize clip = core.std.SeparateFields(clip, tff=True) height = clip.height clip = core.resize.Bicubic(clip, height=height*2) clip = stabilize.Stab(clp=clip, dxmax=0, dymax=1, range=1) clip = core.resize.Bicubic(clip, height=height) clip = core.std.DoubleWeave(clip, tff=True) clip = core.std.SelectEvery(clip, 2, 0) clip = core.std.SetFrameProps(clip=clip, _FieldBased=vs.FIELD_TOP) # tff return [clip] # defining beforeDeCross-function - END # Import scripts import vs_temporalfix import fromDoom9 import SpotLess import qtgmc import validate # Source: 'C:\Users\Selur\Desktop\1-source.mkv' # Current color space: YUV420P8, bit depth: 8, resolution: 704x480, frame rate: 29.97fps, scanorder: top field first, yuv luminance scale: limited, matrix: 470bg, transfer: bt.601, primaries: bt.601 ntsc, format: mpeg-2 # Loading C:\Users\Selur\Desktop\1-source.mkv using DGSource clip = core.dgdecodenv.DGSource("J:/tmp/mkv_43360fd7b44504b5cea6a7b5fab0c634_853323747.dgi",fieldop=0)# 29.97 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. clip = core.std.SetFrameProps(clip=clip, _ColorRange=vs.RANGE_LIMITED) # making sure frame rate is set to 29.97fps clip = core.std.AssumeFPS(clip=clip, fpsnum=30000, fpsden=1001) # making sure the detected scan type is set (detected: top field first) clip = core.std.SetFrameProps(clip=clip, _FieldBased=vs.FIELD_TOP) # tff [clip] = beforeDeCross(clip) # clip current meta; color space: YUV420P8, bit depth: 8, resolution: 704x480, fps: 29.97, color matrix: 470bg, yuv luminance scale: limited, scanorder: top field first, full height: true # Deinterlacing using QTGMC clip = qtgmc.QTGMC(Input=clip, Preset="Fast", TFF=True, opencl=True) # new fps: 59.94 # Making sure content is preceived as frame based clip = core.std.SetFrameProps(clip=clip, _FieldBased=vs.FIELD_PROGRESSIVE) # progressive # Spot removal using SpotLess clip = SpotLess.SpotLess(clip=clip, radT=3, rec=True, pel=1, smoother="zsmooth") # removing flickering using ReduceFlicker clip = core.rdfl.ReduceFlicker(clip=clip, strength=3, aggressive=1) # removing flickering using Small Deflicker clip = fromDoom9.Small_Deflicker(clip=clip, preset=3, cnr=True, zsmooth=True) # changing range from limited to full range for vsTemporalfix clip = core.resize.Bicubic(clip, format=vs.YUV420P8, range_in_s="limited", range_s="full") # setting color range to PC (full) range. clip = core.std.SetFrameProps(clip=clip, _ColorRange=vs.RANGE_FULL) # stabilizing using Temporalfix clip = vs_temporalfix.vs_temporalfix(clip=clip) # changing range from full to limited range for vsTemporalfix clip = core.resize.Bicubic(clip, format=vs.YUV420P8,range_in_s="full", range_s="limited") # setting color range to TV (limited) range. clip = core.std.SetFrameProps(clip=clip, _ColorRange=vs.RANGE_LIMITED) # adjusting output color from: YUV420P8 to YUV420P10 for NVEncModel clip = core.resize.Bicubic(clip=clip, format=vs.YUV420P10) # set output frame rate to 59.94fps (progressive) clip = core.std.AssumeFPS(clip=clip, fpsnum=60000, fpsden=1001) # output clip.set_output()

does seem to work. (I also added deflickering&co for stabilization and SpotLess for cleanUp.)
=> https://www.mediafire.com/file/qo0zawd6h...2.mkv/file

The custom code I used:

core.std.LoadPlugin(path="%FILTERPATH%/MiscFilter/MiscFilters/MiscFilters.dll") core.std.LoadPlugin(path="%FILTERPATH%/DenoiseFilter/ZSmooth/zsmooth.dll") core.std.LoadPlugin(path="%FILTERPATH%/Support/libmvtools.dll") core.std.LoadPlugin(path="%FILTERPATH%/Support/DePan.dll") import stabilize clip = core.std.SeparateFields(clip, tff=True) height = clip.height clip = core.resize.Bicubic(clip, height=height*2) clip = stabilize.Stab(clp=clip, dxmax=0, dymax=1, range=1) clip = core.resize.Bicubic(clip, height=height) clip = core.std.DoubleWeave(clip, tff=True) clip = core.std.SelectEvery(clip, 2, 0) clip = core.std.SetFrameProps(clip=clip, _FieldBased=vs.FIELD_TOP) # tff

Cu Selur