How do I "telecide" de-interlace?

[Holomatrix]

Hello, I have this interlaced AVI and would like to know the best way to telecide de-interlace it for VCD creation? Is there a filter in VirtualDub for that? so I can frame serve to TMPG?
Thanks

[bb]

VCD uses MPEG1, which has no interlacing support. So no need to do IVTC or deinterlacing, depending on your source. If it's telecined, you can use Donald Graft's telecide filter (or his decomb package, if you prefer to frameserve through AviSynth). If it's truly interlaced, you need a deinterlacer, e.g. SmartDeinterlace (by Donald Graft, too). There's an AviSynth version for that one, too.

bb

[Holomatrix]

Thanks for responding. I'm trying to convert my VHS tape AVI files to VCD which are interlaced when I record them using VDUB. Do I need to de-interlace them? (not sure if you mean VCD does not support interlaced video) Also when I backup DVD's that are interlaced, I apply the "Telecide" de-interlace filter in DVD2SVCD which looks better than all the other de-interlacers, even smartdeinterlace. What is the difference between Interlaced and Telecined? sorry for all the question but I'm trying to clear some things up in my mind?
Thanks

[bb]

You can find a bunch of information about telecining, IVTC, and de-interlacing by searching the forums (sorry, it would take too long to explain everything again).

Yes: VCD does not support interlaced video.

If Telecide works for you, then your video is probably phase-shifted, maybe field-swapped, too, but not truly interlaced. Some people use an intelligent deinterlacer like smart deinterlace after telecide to clean up the combing artefacts that survived telecide's threshold. (BTW: I'm using a threshold of 30 most of the time).

You could also simply try to open your AVI in TMPGEnc and fiddle out the correct settings there (interlaced source, etc.). Should be much faster than frameserving through VirtualDub.

bb

[Holomatrix]

So when I load the AVI into TPMEG and load the VCD NTSC template, does it automatically de-interlace it?

[bb]

After loading the profile click on the "Setting" button.

On the "Video" tab choose "Encode mode: Non-interlace".

On the "Advanced" tab choose "Video source type: Interlace".
There's a list of available filters; if necessary check the Deinterlace filter and choose an appropriate method (you can try a short sequence and test the result).

bb

[zambelli]

If you captured these AVIs from VHS and they are interlaced, I assume their resolution is 352x480 (NTSC) or 352x576 (PAL). VCD doesn't support interlaced video because it only has half of the vertical resolution (240 or 288). So you don't really need to deinterlace at all. Instead, simply discard half of your fields and encode to VCD. Or resize to VCD resolution. Either works.

[WarpEnterprises]

@zambelli:

So you don't really need to deinterlace at all
That's not true. If the source can be deinterlaced or even de-telecined and then resized you get a much better picture (noise reduction because you captured more pixel, no staircases on lines,...)

See also a very good explanation at www.100fps.com (the aim there isn't yours but the facts are really good explained).

[zambelli]

I've read 100fps.com stuff and that's exactly what I based my suggestion on. Discarding fields is quoted as a good deinterlacing method, and since the format is VCD, I don't see why he would bother with something better. I am, however, aware that there are better methods.