How to deinterlace this sample?

[beav]

I was just curious what i should use in an avisynth script to deinterlace this music video dvd. I usually only work with anime so I'm clueless.

[manono]

Depending on how picky you are, this seems to work pretty well:

TFM(PP=0,Chroma=True)
TDecimate()

[beav]

Thank you! Don't worry I'm not really picky for this source it's only a music video.

[manono]

PP=0 can be risky as it turns off the post-processor. The post-processor (deinterlacer) messed up a few frames that looked good without it, but it's very possible to get some interlacing, especially at scene changes. I might stick on Vinverse in such situations, to take care of any leftover interlacing.

[beav]

yea in the scene i put a sample of the deinterlacing looks fine, but the rest looks a little bit bad. What is vinverse?

[manono]

Yeah, all I had to go on is the sample. The rest looks worse in what way? Some interlacing remains? You might try just removing the PP=0:

TFM(Chroma=True)
TDecimate()

Unless you're eagle-eyed you might not spot the few frames the deinterlacer messes up. As for Vinverse, it's a 'conditional' deinterlacer. It only deinterlaces those frames that need deinterlacing, and only those parts of the frames it 'sees' as being interlaced. You can find it here:

http://bengal.missouri.edu/~kes25c/vinverse.zip

You might use it like this:

TFM(PP=0,Chroma=True)
TDecimate()
Vinverse()

[beav]

V inverse fixed the few interlaced frames I saw. Now just one more question. My computer has 6 cores and I was just curious how to use this script with avisynth_mt. I have everything set up, I just don't know how to use in the actual script.LoadPlugin("C:\Users\Ryan\Downloads\MeGUI_2 418_x86\tools\dgindex\DGDecode.dll")
LoadPlugin("C:\Program Files (x86)\AviSynth 2.5\plugins\checkmate.dll")
LoadPlugin("C:\Program Files (x86)\AviSynth 2.5\plugins\TIVTC.dll")
LoadPlugin("C:\Program Files (x86)\AviSynth 2.5\plugins\vinverse.dll")
LoadPlugin("C:\Program Files (x86)\AviSynth 2.5\plugins\RemoveGrainS.dll")
LoadPlugin("C:\Program Files (x86)\AviSynth 2.5\plugins\FFT3DFilter.dll")
LoadPlugin("C:\Program Files (x86)\AviSynth 2.5\plugins\MSharpen.dll")


DGDecode_mpeg2source("C:\BRITNEY_SPEARS\VIDEO_TS\V TS_02_2.d2v", cpu=6)
checkmate()
TFM(PP=0,Chroma=True)
TDecimate()
Vinverse()
RemoveGrain(mode=1)
FFT3DFilter()
MSharpen(threshold=1,strength=50)
Crop(4, 0, -4, -0)
Spline36resize(640,480)

[manono]

I guess you know the CPU=6 setting in the DGDecode line has nothing to do with how many cores your CPU has, but tells DGDecode to deblock and dering everything. I never use it myself as it smooths the hell out of a video.

Using MT can be tricky as you have to tune it and some filters can use the '2' setting and others can't. So you have to do a lot of testing. It's often suggested to use a light setting at the top:

SetMTMode(5,12)#12 for twice the number of cores, but may have to experiment

And then put what you really want after the DGDecode_mpeg2source line:

SetMTMode(2)

More info here:

http://forum.doom9.org/showthread.php?t=148782

http://web.archive.org/web/20130308191718/http://avisynth.org/mediawiki/MT_support_page

Or just try what you want from the beginning:

SetMTMode(2,12)

That's what I often do.

[beav]

ok so this is a different video from the same dvd. Can i use the same method of deinterlacing on it?

[manono]

You could, yes. I noticed that one frame getting deinterlaced by Vinverse was pretty obviously blended (which is what Vinverse does). So I decided maybe this is a bit better:

TFM(Clip2=Nnedi3,Chroma=True)
TDecimate()

That 'Clip2' setting says to use Nnedi3 as the deinterlacer when needed. Doing it that way a lot of frames get deinterlaced and using Nnedi3 keeps those deinterlaced frames looking good. There are lots of ways of doing this.

[beav]

on the dvd there is this last dvd extra. how do I deinterlace this?

[manono]

That was shot using video cameras. If for DVD you don't deinterlace at all. If it has to be progressive, then you use a deinterlacer in single or double-rate (bob) mode. Yadif, QTGMC, whatever.