Dev 2026.08.18 version error

[Selur]

The error happens if Hybrid can't access the named pip 5 seconds after its creation.

The script seems fine:

# Imports import ctypes import sys import os import vapoursynth as vs # using Vapoursynth R-1 # 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/Vapoursynth/Lib/site-packages/vapoursynth/plugins2/cas.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/vsfilters/SharpenFilter/AWarpSharp2/libawarpsharp2.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/vsfilters/Support/TCanny.dll") core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/Vapoursynth/Lib/site-packages/vapoursynth/plugins2/deblock.dll") 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/DGDecNV/DGDecodeNV_AVX2.dll") # Import scripts import edi_rpow2 import sharpen import dehalo import degrain import deblock import qtgmc import validate # Source: 'C:\Users\Computer\Videos\RJ videos\Misc\VDub\VDub test\Misc\(1998) Decade.mkv' # clip current meta; color space: YUV420P8, bit depth: 8, resolution: 720x480, fps: 29.97, color matrix: 470bg, color primaries: Unspecific, color transfer: Unspecified, yuv luminance scale: limited, scanorder: top field first, full height: true (Source) # Loading 'C:\Users\Computer\Videos\RJ videos\Misc\VDub\VDub test\Misc\(1998) Decade.mkv' using DGSource clip = core.dgdecodenv.DGSource("C:/Users/Computer/AppData/Local/Temp/2026-08-18@23_18_20_2610.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. 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 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) # scan type: top field first # ColorMatrix: adjusting color matrix from fcc to 709 # adjusting luma range to 'limited' due to post clipping clip = core.resize.Bicubic(clip, matrix_in_s="fcc", matrix_s="709", range_in=0, range=0) # Deinterlacing using QTGMC clip = qtgmc.QTGMC(Input=clip, Preset="Very Slow", InputType=0, TFF=True, TR2=3, SourceMatch=3, Lossless=2, NoiseProcess=2, GrainRestore=0.7) # new fps: 59.94 # Making sure content is perceived as frame based clip = core.std.SetFrameProps(clip=clip, _FieldBased=vs.FIELD_PROGRESSIVE) # scan type: progressive # applying deblocking using DeBlock QED clip = deblock.Deblock_QED(clip) # removing grain using MCDegrain clip = degrain.mcdegrainsharp(clip) # applying dehalo using DeHalo_alpha clip = dehalo.DeHalo_alpha(clip, rx=2.50) # applying dehalo using YAHR clip = dehalo.YAHR(clip) # resizing using NNEDI3 on the GPU # current: 720x480 target: 1440x960 clip = edi_rpow2.nnedi3cl_rpow2(clip, rfactor=2, nsize=3, nns=4) # 1440x960 # contrast sharpening using CAS clip = core.cas.CAS(clip, sharpness=1.000) # adding Grain using noise clip = core.noise.Add(clip) # letterboxing 1440x960 to 1920x1080 clip = core.std.AddBorders(clip, left=240, right=240, top=60, bottom=60) # set output frame rate to 59.94fps (progressive) clip = core.std.AssumeFPS(clip=clip, fpsnum=60000, fpsden=1001) # output clip.set_output() # clip current meta; color space: YUV420P8, bit depth: 8, resolution: 1920x1080, fps: 59.94, color matrix: 709, color primaries: Unspecific, color transfer: Unspecified, yuv luminance scale: limited, scanorder: progressive, full height: true (Meta) # script was created by Hybrid 2026.08.18.1

The encoding calls:

"C:\Program Files\Hybrid\64bit\Vapoursynth\vspipe.exe" "C:\Users\Computer\AppData\Local\Temp\encodingTempSynthSkript_2026-08-18@23_18_20_2610_0.vpy" \\.\pipe\2026-08-18@23_18_20_2610_07_video --outputindex 0 -c y4m --progress "C:\Program Files\Hybrid\64bit\x264.exe" --preset fast --crf 21.50 --profile high --level 5.1 --sync-lookahead 48 --psy-rd 1.00:0.15 --vbv-maxrate 300000 --vbv-bufsize 300000 --sar 1:1 --qpfile "C:\Users\Computer\AppData\Local\Temp\(1998) Decade_1_2026-08-18@23_18_20_2610_06.qp" --deblock -1:-1 --non-deterministic --range tv --colormatrix smpte170m --demuxer y4m --input-range tv --fps 60000/1001 --output-depth 8 --output "C:\Users\Computer\AppData\Local\Temp\2026-08-18@23_18_20_2610_07.264" \\.\pipe\2026-08-18@23_18_20_2610_07_video

seem fine too.
Hmm,... (I did change a lot the last few days, but only in the Avisynth sections of Hybrid,.. iirc.)
Did some small tests, but couldn't reproduce the problem so far.

A. Try whether it helps to use a temp folder to a dedicated folder outside AppData. (maybe Windows Defender or some other virus scanner is causing issues)
B. Does the Vapoursynth Preview work fine?
C. Does it also happen with Hybrid_dev_2026.08.19-185814.exe ?
D. Does it also happen with other source files?
(Do you know which version you used before? Mainly asking to know whether this is really an issue with the named pipe usage, which isn't that old. It was added around 2026-07-11.)

Will look at it some more after work.

Cu Selur