Removing Interlace Jaggies from a Progressive Video

[Alwyn]

Without spending a lot of time on it, does anybody have any suggestions re AVISynth or VDub to improve the attached (from You Tube)? There also seems to be a bit of colour shifting.

I've tried ChromashiftSP but it moves the reds and the greens. Is there a way of moving only the greens?

I've also worked through this topic:

https://forum.videohelp.com/threads/332303-Removing-jagged-interlacing-artifacts-from-...ogressive-file

and used DG's smart deinterlacer filter with moderate success.

Thanks for any help.

[Selur]

I've tried ChromashiftSP but it moves the reds and the greens. Is there a way of moving only the greens?

Try ChromaShiftSP2:

#ChromaShiftSP2: Shift U & V chroma separately with subpixel accuracy, based on the ChromaShiftSP function by IanB & McCauley
function ChromaShiftSP2 (clip clp, float "UX",float "UY", float "VX",float "VY", string "ResizeMethod") {
  UX = default(UX, 0.0) # positive values shift the U chroma to left, negative values to right
  UY = default(UY, 0.0) # positive values shift the U chroma upwards, negative values downwards
  VX = default(VX, 0.0) # positive values shift the V chroma to left, negative values to right
  VY = default(VY, 0.0) # positive values shift the V chroma upwards, negative values downwards
  ResizeMethod = Default(ResizeMethod, "Spline36")

  U = clp.UToY()
  U = Eval("U." + ResizeMethod + "Resize(U.Width(), U.Height(), UX, UY, U.Width()+UX, U.Height()+UY)")

  V = clp.VToY()
  V = Eval("V." + ResizeMethod + "Resize(V.Width(), V.Height(), VX, VY, V.Width()+VX, V.Height()+VY)")

  YToUV(U, V, clp)
}

source: https://forum.doom9.org/showthread.php?p=1851933#post1851933
and only shift the U plane.

[Sharc]

Does this look a better re. jaggies than what you already got?

[Selur]

Did a quick try with Vapoursynth and BasicVSR++ (https://pastebin.com/Lj18WqBg) which might be too smooth, but might be better than having all the compression artifacts.

Cu Selur

Ps.: @Sharc: What did you do to get rid of the embedded combing artifacts?

[Sharc]

Ps.: @Sharc: What did you do to get rid of the embedded combing artifacts?

Ouch! I deleted the script accidentally. If I remeber correctly it was something like

bilinearresize(640,360) #adjust the vertical downscale for best compromise re. blurring the combing artifacts vs loss of details
awarpsharp(depth=8)
spline36resize(640,480) #restore the original frame size
QTGMC(InputType=2) #general cleanup

[Alwyn]

Selur, it is a bit smooth but otherwise it looks the best of the bunch, perhaps a bit soft. Unfortunately, I'm not into VS though.

I loaded up that ChromashiftSP2, but couldn't get it to do anything.

I'll go with Sharc's script. Thanks Sharc.

[killerteengohan]

santiag(strv=0, nns=4, nsize=5)

Should clean those right up. You wont have to blur it with resizing.

[Alwyn]

Thanks Killer. I'm not familiar with Santiag, so I checked the wiki, and it directed me to this post on Doom9.

My question is, what does one do with that code? Do I paste it into a current AVS or save it as an AVSI as a plugin?

From your code, it could be a separate plugin/DLL?