How to fix these jagged lines artifacts in Avisynth?

[elektro]

See especially the roof of that stage. The video is interlaced and has 4:2:2 chroma subsampling. After deinterlacing with QTGMC those aliasing artifacts are still noticeable. I think it could be a sampling issue. Any ideas how to get the best result besides using an antialiasing filter like Santiag (I tried TurnRight().Santiag().TurnLeft())? On a side note, should I save the video as 4:2:2 or 4:2:0?

[Selur]

Did you try 'Very Slow' as QTGMC preset? (iirc one of the parameters that changed between 'Slower' and 'Very Slow' helped with that,...)

On a side note, should I save the video as 4:2:2 or 4:2:0?

Depends on what you are planning to do with it.

[elektro]

Did you try 'Very Slow' as QTGMC preset? (iirc one of the parameters that changed between 'Slower' and 'Very Slow' helped with that,...)

On a side note, should I save the video as 4:2:2 or 4:2:0?

Depends on what you are planning to do with it.

1. I usually use the Slow parameter, more exactly QTGMC(Preset="Slow", FPSDivisor=1, MatchPreset="Slow", Sharpness=0.5). I'm gonna give it a try with Very Slow.
2. It's a show recording for my personal library.

[Selur]

2. It's a show recording for my personal library.

Assuming that means you might want to do something with it at a later on, I would keep the color sampling unless hardware decoding is necessary. (then you might even upconvert it to 4:4:4, since that often has better support than 4:2:2)

[jagabo]

The problem is the video is way over sharpened. Try something like:

LWLibavVideoSource("sample.mkv") 
QTGMC(preset="very slow", Sharpness=0.0)
Santiag(3,1)

Still some buzzing though.

[Selur]

Yeah, applying an additional QTGMC with InputType=3 and more aggressive AA can help a bit, some flickering can also be removed with masked denoising,... question is when the effort is not worth the result anymore

[elektro]

The problem is the video is way over sharpened. Try something like:

LWLibavVideoSource("sample.mkv") 
QTGMC(preset="very slow", Sharpness=0.0)
Santiag(3,1)

Still some buzzing though.

Thanks. But something strange happened: the image became much darker (with or without the Santiag filter). It seems that Very Slow preset triggers that. Do you have any idea why? I'm using the latest Avisynth+ and I installed the latest versions of all required tools for QTGMC.

[poisondeathray]

But something strange happened: the image became much darker (with or without the Santiag filter). It seems that Very Slow preset triggers that. Do you have any idea why? I'm using the latest Avisynth+ and I installed the latest versions of all required tools for QTGMC.

Possibly an old or conflicting version of masktools2 or mvtools2 . Check your plugins directory and clean it out

You can use avsinfotool to help identify versions

[elektro]

But something strange happened: the image became much darker (with or without the Santiag filter). It seems that Very Slow preset triggers that. Do you have any idea why? I'm using the latest Avisynth+ and I installed the latest versions of all required tools for QTGMC.

Possibly an old or conflicting version of masktools2 or mvtools2 . Check your plugins directory and clean it out

You can use avsinfotool to help identify versions

Thanks. I found the problem: QTGMC.avsi was out of date.