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+--- Thread: [HELP] No preview window (/thread-4159.html)
RE: No preview window - Miranda - 19.07.2025
Still no preview, but the job now runs.
Just got this error on another small file. Crashed with exit status 0
RE: No preview window - Selur - 19.07.2025
Usually, if the preview does not work, neither will the encoding.
Does the Preview show an error?
Seeing that you are using:
* mcdegrainsharp
* nnedi3
does it work if either of them is disabled? (I suspect the issue is still with libmvtools and MCDeGrainSharp; then it could also be an incompatibility with zsnedi3)
RE: No preview window - Selur - 19.07.2025
Uploaded a new dev, let me know whether that one works.
If it does not: Please properly check what filter is causing the issue. MCDegrainSharp or NNEDI3.
Cu Selur
RE: No preview window - Miranda - 19.07.2025
Thanks - should I remove the old Hybrid first, and its folders and files?
RE: No preview window - Selur - 19.07.2025
It should be okay, to just install this one over, assuming your had a previous dev installed.
Cu Selur
RE: No preview window - Miranda - 19.07.2025
New dev version:
A new job has just completed (ProRes to ProRes Upscale) with MCDegrainSharp and Resize, but still no preview window.
I tried preview with no filters - still no preview window. It pops up grey, then disappears.
Is there any other way to find the preview display error without having to have preview open?
DeBug attached with no filter, no preview, yet job completes
RE: No preview window - Selur - 19.07.2025
Quote: Is there any other way to find the preview display error without having to have preview open?Opening the script in vspipe should also work.
Problem is, Hybrid will have deleted the preview script.
Quote:I tried preview with no filters - still no preview window. It pops up grey, then disappears.okay, then it must be still something with the Vapoursynth environment that is messed up.
1. Do you have Python or Vapoursynth installed on your system ? (not counting the one coming with Hybrid)
2. If you open vsViewer, does it now work or do you still get some error?
3. If it does open without an error (aside from that the previous file is gone), clear the text field, enter:
# Imports
import vapoursynth as vs
# getting Vapoursynth core
import sys
import os
core = vs.core
# Import scripts folder
scriptPath = 'C:/Program Files/Hybrid/64bit/vsscripts'
sys.path.insert(0, os.path.abspath(scriptPath))
# loading plugins
core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/vsfilters/SourceFilter/LSmashSource/LSMASHSource.dll")
# Import scripts
import validate
# Source: 'M:\5994 - 2997 Prog-OUT\Trailer-28 Minutes-FCP_SD 768_576.mov'
# Current color space: YUV422P10, bit depth: 10, resolution: 768x576, frame rate: 23.976fps, scanorder: progressive, yuv luminance scale: limited, matrix: 470bg, transfer: bt.709, primaries: bt.601 pal, format: prores
# Loading M:\5994 - 2997 Prog-OUT\Trailer-28 Minutes-FCP_SD 768_576.mov using LibavSMASHSource
clip = core.lsmas.LibavSMASHSource(source="M:/5994 - 2997 Prog-OUT/Trailer-28 Minutes-FCP_SD 768_576.mov")
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_BT709), if it is not set.
if validate.transferIsInvalid(clip):
clip = core.std.SetFrameProps(clip=clip, _Transfer=vs.TRANSFER_BT709)
# 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 23.976fps
clip = core.std.AssumeFPS(clip=clip, fpsnum=24000, fpsden=1001)
# making sure the detected scan type is set (detected: progressive)
clip = core.std.SetFrameProps(clip=clip, _FieldBased=vs.FIELD_PROGRESSIVE) # progressive
original = clip
original = core.text.Text(clip=original,text="Original",scale=1,alignment=7)
clip = core.text.Text(clip=clip,text="Filtered",scale=1,alignment=7)
stacked = core.std.StackHorizontal([original,clip])
# set output frame rate to 23.976fps (progressive)
stacked = core.std.AssumeFPS(clip=stacked, fpsnum=24000, fpsden=1001)
# output
stacked.set_output()What happens? Do you see a preview or an error message?
Please, answer question 1.-3., thanks.
Cu Selur
Ps.: Also do not post debug outputs about encoding unless the preview works,... that part of the debug output doesn't help at all in this situation. Until the preview works, encoding is of no interest.
RE: No preview window - Miranda - 19.07.2025
1. Do you have Python or Vapoursynth installed on your system ? (not counting the one coming with Hybrid)
No.
2. If you open vsViewer, does it now work or do you still get some error?
No errors.
3. Pasted text, pressed F5 - same thing, window pops up, displays grey briefly, then vanishes.
RE: No preview window - Selur - 19.07.2025
Quote: 3. Pasted text, pressed F5 - same thing, window pops up, displays grey briefly, then vanishes.The Window where you pasted the text into, has a Log at the bottom, that should show an error or at least some additional output.
=> what does it show if you press F5 ?
Cu Selur
RE: No preview window - Miranda - 19.07.2025
Before the viewer window disappears, I see the start of a warning that says "QT Warning... PixMap is a null PixMap.