Cartoon with chroma one frame ahead of luma and lots of ringing?

[aramkolt]

Hello all, I have a clip from a U-Matic capture that I'd like to learn how to improve. Chroma appears to be leading the luma by a frame which I have not observed before. There's also a fair amount of ringing everywhere. Ringing with U-Matic isn't unexpected, but I'm not sure what the best deringing filter would be when it is this severe.

Any advice/sample scripts or suggestions would be very appreciated!

[Sharc]

Try something like

BSSource("SC1ATK303_Trim.mov")
crop(0,2,-0,-0)
assumeBFF()
QTGMC(preset="fast").Srestore(frate=23.976)
chromashiftSP(3.0,0.0)
FineDehalo(rx=2.0,ry=1.0,edgeproc=1.0,brightstr=3.0)

[aramkolt]

Thanks Sharc, that does look a lot better!

I was going to also ask about the deinterlace. This is from a 50th birthday of Donald Duck that I guess must have aired on CBS in 1984, so it contains quite a mix of non-cartoon footage as well. I'm wondering if there's a deinterlacing algorithm that would work on the entire show and end up with a deinterlaced framerate of 59.94.

Logically, I'd think you'd want the algorithm to identify ~23.98 sections IVTC first, then create duplicate progressive frames as needed out of those as opposed to doing a direct to 59.94FPS with QTGMC, but I'm not sure if that is actually possible. I suppose variable ending framerate would be ok to bounce between either 23.98 and 59.94, but my guess is YouTube won't support that?

Here's a more regular clip from the same show just as an example of ideally the same script being used on both those types of scenes as well as the cartoon portions. Trying to avoid chopping up the clip into many many clips.

[Sharc]

Your first clip is not telecined but field blended. So one should deblend it first and then 2-3 telecine 23.98->29.97fps
The second clip is true interlaced, BFF.
If you want to combine the 2 clips for 59.94fps progressive you could do it like

v1=BSSource("SC1ATK303_Trim.mov")
v2=BSSource("SC1ATK303_Trim2.mov")

last=v1
assumeBFF()
QTGMC(preset="fast").Srestore(frate=23.976) 
chromashiftSP(3.0,0.0)
FineDehalo(rx=2.0,ry=1.0,edgeproc=1.0,brightstr=3.0)

v1tc=separatefields().changefps(59.94).weave() #3-2 telecining

v=v1tc.assumeTFF().QTGMC()++v2.assumeBFF().QTGMC()  #concatenating the 2 bob-deinterlaced clips (59.94p)
v=v.MCDegrainSharp() #denoise

return v

(You may apply the same/similar dehalo filter to the 2nd clip as well, as needed)
Maybe someone has a better proposal.