Ivtc

[Prim3]

Hi, i'm trying to do IVTC through Decomb but the fades and the part I deinterlaced has artifacts like jagged lines and combing.

This is the script:


#Test Script

LoadPlugin("C:\Program Files\GordianKnot\DGMPGDec\DGDecode.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\Decomb521.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\Convolution3DYV12.dll")

mpeg2source("C:\Documents and Settings\Makaveli\Desktop\pot_ova1_ed2.d2v")

ConvertToYuY2()
Telecide(order=1,guide=1,post=4)
Decimate(quality=3)
ConvertToYV12()
ChangeFPS(23.976)
Convolution3D (0, 32, 128, 32, 128, 10, 0)



If anyone can explain or tell me how to fix it, it would be highly appreciated. Thanks.

[neuron2]

Please post a link to an *unprocessed* VOB fragment (or source stream) that shows the issue.

[ChiDragon]

You should remove the unnecessary ConvertToYUY2()/ConvertToYV12(). Also the ChangeFPS(23.976) shouldn't be necessary if your source is 29.97 and could be dropping or adding frames to change from 24000/1001 fps to an approximation.

[Prim3]

Please post a link to an *unprocessed* VOB fragment (or source stream) that shows the issue.

Do you mean the .MKV file that I encoded or the VOB that I used to encode? (sorry for noob questions)

[ChiDragon]

The VOB source file.

[Prim3]

http://www.uploading.com/en/files/72I7MGI5/pot_ova1_ed2.rar.html

There you go. That's the VOB file I used. If you would like the .MKV file, then I can upload that as well. Thanks.

[ChiDragon]

255MB... You should demux and cut out a sample (that's what neuron2 meant by fragment) of an area that is problematic when you encode.

[Prim3]

How do I do that?

I've tried doing it with VDub, VobEdit, VobBlanker and TMPGEnc but no luck. I know I'm doing something wrong. Is there any way you can tell me how to cut a fragment of it?

Thanks, very appreciated.

[Valeron]

dgindex can work for you, with the buttons at the right bottom corner

[Prim3]

Yeah I've tried that too. But, does DGIndex save it as a .VOB back again? I'm not quite sure if it does or not.

[foxyshadis]

It saves an m2v, which is all that people need. vobs include audio, subtitles, and all that junk that are unrelated to the problem (although it makes it more fun to watch the sample).

[Prim3]

Here you go:

http://www.uploading.com/files/K5ODJ3WA/VTS_01_1.demuxed.m2v.html

Hope I did it right and I sure hope it helps!

Thanks once again.

[ChiDragon]

Okay so I think what you're referring to are the 29.97i fades and overlays.

Interlaced fades are always tough for deinterlacers to pick up, but personally I don't mind the slight interlacing there. The deinterlacing artifacts are often more noticeable to me than the interlacing. I would just leave it instead of trying to tweak the thresholds or manually indicating the frames to deinterlace.

Now with that said, all of the interlacing caused by the text overlays in this sample happen to occur on the frames that should be decimated. Unfortunately their appearance and disappearance sometimes cause the wrong frames to be decimated.

TFM(PP=0)
TDecimate(mode=1,ovr="pot_ova1.txt")

Using this script you can tell TDecimate to drop specific frames indicated in the ovr file. Check the TDec docs for more info.