Black Bar at Bottom of mpeg

[belyshev]

Last 2 releases of Hybrid have same problem, when processing 1080i original camcorder video with QTGMC, a black bar will cover bottom of the video.  But when using same clip repackaged in mkv, the problem goes away. Here are 2 samples of videos:

https://drive.google.com/file/d/12DIyWEo...sp=sharing

https://drive.google.com/file/d/1T-wxPEh...sp=sharing

[Selur]

Taking the original camcorder extract (1440x1080@29.97fps, tff, PAR 4:3) applying QTGMC (with Bob), Hybrid uses:

# 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/DenoiseFilter/ZSmooth/zsmooth.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/libmvtools.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")
# Import scripts
import qtgmc
import validate
# Source: 'C:\Users\Selur\Desktop\Original Camcorder Extract.mpeg'
# Current color space: YUV420P8, bit depth: 8, resolution: 1440x1080, frame rate: 29.97fps, scanorder: top field first, yuv luminance scale: limited, matrix: 709, transfer: bt.709, primaries: bt.709, format: mpeg-2
# Loading C:\Users\Selur\Desktop\Original Camcorder Extract.mpeg using DGSource
clip = core.dgdecodenv.DGSource("J:/tmp/mpeg_5d33dc3845a0123b005b16659fd70139_853323747.dgi",fieldop=0)# 29.97 fps, scanorder: top field first
frame = clip.get_frame(0)
# setting color matrix to 709.
clip = core.std.SetFrameProps(clip, _Matrix=vs.MATRIX_BT709)
# 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_BT709), if it is not set.
if validate.primariesIsInvalid(clip):
  clip = core.std.SetFrameProps(clip=clip, _Primaries=vs.PRIMARIES_BT709)
# 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
# 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
# adjusting output color from: YUV420P8 to YUV420P10 for NVEncModel
clip = core.resize.Bicubic(clip=clip, format=vs.YUV420P10, range_s="limited")
# set output frame rate to 59.94fps (progressive)
clip = core.std.AssumeFPS(clip=clip, fpsnum=60000, fpsden=1001)
# output
clip.set_output()

and I see no black bars like you mentioned.

converting the content to 1:1 PAR and 1920x1080

I also see no black bars:

I also uploaded an encode of this to mediafire.
=> I can't reproduce your problem, but my guess is you messed up the settings somewhere. This does not look like a bug in Hybrid.

Cu Selur

Ps.: loading the 'Repackaged to mkv without re-encoding.mkv', I basically get the same script (https://pastebin.com/179HcuKR) and outputs.

[Selur]

Ahh, it's the source filter. Using DGDecode seems to be the problem:

Depending on your setup enable either 'Use DGDecNV when available', 'Prefer BestSource' seems to help.

Cu Selur

Ps.: created a bug report in the dgmpegdec forum https://www.rationalqm.us/board/viewtopi...f=7&t=1444. => DG is on it.
There were some older versions of Hybrid that by default had 'Prefer BestSource' enabled. Also, since DGDecode doesn't support mkv, another source filter is used when the content is inside a mkv.

[belyshev]

I forgot to mention that I completely uninstalled & reinstalled using default settings.  Thank you for finding the solution.

[Selur]

Uploaded a new dev version which comes with fixed version of DGDecode (thanks to DG) which helps with the sample on my system.

Cu Selur

[belyshev]

Thank Cu Selur you for fixing the problem.

[Selur]

Cu=c u=see you
Selur <- my name