Quantcast Deinterlace a DVD lossy using QTGMC hybrid? - digitalFAQ Forum
  #1  
04-16-2022, 07:54 AM
jedi55 jedi55 is offline
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HI
Im trying to deinterlace a DVD lossy using QTGMC hybrid.
Could someone explain what are the best settings.
Im trying to preserve as much quality as possible.
I hope to upscale it and transfer to blu-ray
Is the quality better from doubled framerate or not?
Any help would be greatly appreciated.
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  #2  
04-16-2022, 01:42 PM
msgohan msgohan is offline
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Note for context: VideoHelp thread on same topic is currently on post #12; waiting on proper re-done sample so targeted advice can be offered.
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  #3  
04-16-2022, 03:07 PM
themaster1 themaster1 is online now
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If you want quality , you most likely want to use the lossless mode of qtgmc, thus the most basic:
Quote:
# Note: Twice refined source-match with true lossless. Exact detail, but likely combing and shimmer
QTGMC( Preset="fast", SourceMatch=2, Lossless=1, Sharpness=0.4, TR2=2, EdiThreads=4)
SelectEven()
If it's a movie you may want to decimate to get 23.9 fps, thus

Quote:
QTGMC( Preset="fast", SourceMatch=2, Lossless=1, Sharpness=0.4, TR2=2, EdiThreads=4)
SelectEven()
TDecimate() ### TDecimate(mode=1) # for cartoon
for tricky vhs content i had great success with this:
Quote:
QTGMC( Preset="fast", SourceMatch=3, Lossless=2, Sharpness=0.2, TR2=3, EdiThreads=4)
SelectEven()
# Note: TR2=3 to keep fine details and keep certain oblique lines perfect (again tested on tricky vhs)
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The following users thank themaster1 for this useful post: The_Outsider (04-21-2022)
  #4  
04-19-2022, 03:58 PM
jedi55 jedi55 is offline
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Thank you its starting to make sense.
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  #5  
04-20-2022, 04:51 AM
lollo2 lollo2 is offline
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Quote:
QTGMC ... SelectEven()
Is there a reason why you propose deinterlacing and then remove a field throwing away half of the information? An interlaced video consists on a field based time resolution having a vertical resolution that is half the resolution of the frame.

To OP: beware that lots of material on DVDs is coded interlaced but it is not.

A channel on S-VHS / VHS capture and AviSynth restoration https://bit.ly/3mHWbkN
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