Aside from vertical blurring, what else can remove adaptive deinterlace jaggies?
Drop-frame is/was a bit easier, simple anti-aliasing needed. This specific dumb "smart" deinterlace method, not so much.
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Use a better deinterlacer? You've provided no sample, nor what script/deinterlacer you're using or have tried.
And sometimes the aliasing is in the source, and might remain after being deinterlaced, irrespective of the deinterlacer you use.
What to use to fix it after the fact? Maybe QTGMC in its progressive mode. But it's often too destructive of detail to use it. Or try one of the many anti-aliasing filyers.
I wasn't the one who use the bad deinterlacer, and it was done more than a decade ago. Original tapes long ago tossed. So a moot aspect at this point. The damage is already done.
Nope, not in the source.
Already tried QTGMC. No help on an adaptive.
What "many anti-aliasing filyers" (fillers?) do you refer to?
Not able to share sample, and this is mostly meant as brainstorming for possible methods anyway. I have my methods, and have for many years. But I'm always learning, see what's new, seeing what I may have missed in the past.
Sometimes it helps to SeparateFields(), SelecteEven() (or odd), and nned3(dh=true). Or blend both even and odd (with appropriate line shift).
Maybe try DAA or Santiag.
This isn't toons.
And I'm not really an anime fan, like maybe 10-20 at most (mostly Macross). Prefer dubs; I have books if I want to read.
I'm thinking vertical blur is still our main options, even with AA.
Key Points: Can remove horizontal shimmering effects from progressive sources. Experiment with InputType=1, 2 or 3 for best results. FPS will not be doubled.
InputType=2,3 are designed for badly deinterlaced material with considerable horizontal artefacts.
QTGMC( Preset="Slower", InputType=2, ProgSADMask=12.0 ) # Process progressive source with major artefacts, slightly favoring detail over repairs