Encoding Interlaced YV12 Chroma to Progressive

[SaurusX]

I've got an animated DVD source where the video was digitally created and stored at 60i on the disc. It IS interlaced as there are many scenes with 60i fast moving effects, but being 2D animation is largely progressive in appearance. I'm using DGIndex and MPEG2SOURCE to frameserve to AVISynth using MeGUI. Both the video preview window and the final encode have an exaggerated stair step effect that is most pronounced on diagonals and anything red. After much reading my understanding is that this is caused by the general low resolution of chroma in the first place, halving it again due to being interlaced, and perhaps coupled with the chroma upsampling error.

I cannot find a hard and fast solution to this. My approach is to use the following code to smooth the chroma and then apply a bit of resharpening. But is there a better way?

mpeg2source("clip.d2v")
TFM()
KNLMeansCL()
clean=last
maa2mod(chroma=true, aac=32).awarpsharp2(depth=2)
mergechroma(clean, last)

SAMPLE HERE

[davexnet]

As in any situation where cadence may be an issue, post a
20 seconds or so clip from the source

[SaurusX]

See the original post for the added sample.

[davexnet]

For this kind of telecined clip use tdecimate to reduce to 23.976 fps


video=mpeg2source("C:\your_path\Sample2.demuxed.d2 v")
video=video.tfm().tdecimate()
return video

[jagabo]

Strong chroma deblocking:

#progressive frames
luma=last
Deblock_QED(quant1=30, quant2=30)
Santiag()
aWarpSharp(depth=10)
MergeChroma(luma,last)

[LigH.de]

The filters TFM and TDecimate are provided by the TIVTC plugin. The rest ... even more plugins (*.dll) and possibly also import scripts (*.avsi).

[SaurusX]

Thanks everyone. I'll consider all of your suggestions.