Video has judder after re-encoding with Avisynth. How to fix?

[VideoFanatic]

Original MPEG2 sample

H264 Sample after re-encoding with the below script

setmtmode(5,9)
Mpeg2Source("E:\Video.d2v", CPU=6)
setmtmode(2)

McTemporalDenoise(settings="medium", interlaced=true) # Sharpening strength is 150

AssumeTFF() # or AssumeBFF() depending on the source
QTGMC(Preset="Super Fast") # Removes interlacing artefacts. Strangely this is faster than Ultra Fast
Vinverse() RemoveSpots() AddGrainC(var=1.0,uvar=1.0) SeparateFields() SelectEvery(4,0,3) Weave()

Tweak(Bright=0, Sat=1.0, Cont=1.0, Hue=10.0, Coring=False)

Crop(8,0,-12,-8)
AddBorders(10,4,10,4, $000000)

I've used this script hundreds of times without problems so I don't understand what's causing the judder. You can see the judder in Windows Media Player or on your TV.

[2Bdecided]

I think the field order is wrong: encoded as TFF, flagged as BFF (or the reverse).

Cheers,
David.

[VideoFanatic]

It's interlaced though isn't it? I thought it it's interlaced then you should use TFF which I did?

Is there any way to find out if the source is TFF or BFF?

[smrpix]

Sure, use mediainfo -- but wouldn't it be just as quick to reencode a few seconds with the parameter switched and see how it looks?

That's what you'll end up doing anyway.

And no, not all interlace is TFF, DV for example.

[jagabo]

"AssumeTFF()" is probably wrong for that particular video.

[sanlyn]

Is there any way to find out if the source is TFF or BFF?

Been through this a few times earlier. Load this script and observe frames with motion in VirtualDub, one frame at a time:

AssumeTFF().SeparateFields()

If you see smooth motion, the field order is TFF. If motion is back and forth from field to field, then it's BFF().

[VideoFanatic]

Thanks I tried BFF and it's working now.

[sanlyn]

I tried BFF and it's working now.

Methinks that whoever did this earlier deinterlace/reinterlace/encode screwed up a bit and gave you some jaggies on angular lines that you don't want. A fairly clean vid for a change, all I used was MCTemporalDenosie, Deblock_QED, and some light TemporalSoften. But your black levels, contrast and gamma are way off:


[Attachment 16962 - Click to enlarge]

Adding red was good, but you also need some blue. Everybody's orange without it.