SVCD to avi, but force film or IVTC or else?

[gurabli]

Hi!

I am converting an SVCD to avi.

DGIndex shows that fram rate is 29.970 and video type NTSC.

I tried to use Forced Film, but when I look at a sample, it looks like frames are missing, jerky playback.

Tried without forced film and than to IVTC in GKnot but again, it seem to me that the playback is not smooth.

Should I leave it at 29.970 fps and don't do nothing? Is is a problem to leave?

I had never before this with DVDs but this is the first time with SVCD source.

(there are no interlaced frames in the source)

[neuron2]

If DGIndex shows NTSC, then it's either pure interlaced, hard telecined, straight progressive, or a hybrid of the three. You haven't given enough information for me to guess the nature of your source material. Please place a small source clip on my FTP server (see below).

[gurabli]

OK, I will post a sample. You mean a clip from the SVCD mpg file, right?

But I can do it only tomorrow. I'll let you know when it's uploaded.
And thanx for your help!

[neuron2]

Right, a clip from the SVCD mpg file.

[neuron2]

Did you put the clip on my server? If so, please tell me the file name. Thank you.

[gurabli]

Sorry, not yet. But now I am uploading it.
In the dir Gurabli Sample.
About 10-15 minutes and its up!

[neuron2]

You're a lucky man, my friend.

They brought that up from film rate to NTSC by duplicating every fourth frame. That means you can just do this:

MPEG2Source("rdb.d2v")
Decimate(5)

[gurabli]

Wow, thanx!

And if I leave it at default, at 29,976 fps?
what will this script do?

And why is it a luck for me?

This is what I call a bunch of questions:)

Thanx in forward!

[neuron2]

Originally posted by gurabli
And if I leave it at default, at 29,97 fps? You can do that, but you will have some motion judder due to the duplicate frames. Also, you'll waste bits on duplicates. If you are making an AVI, why wouldn't you just return it to its original 23.976?

If you must render it at 29.97 for DVD, you might consider returning it to 23.976 first and then using DGPulldown to flag it up to 29.97. There will be less judder that way.

what will this script do? The script just removes the duplicate frames. If you want to keep it at 29.97, remove the Decimate() call and do nothing.

And why is it a luck for me? The inverse telecining in this case was very easy. I meant you are lucky that they just duplicated frames instead of applying hard telecine, field blending, etc. It is very easy to recover the original progressive stream for this clip. I wish it was always that easy!

[gurabli]

Thank you very much neuron2 for ypu help and answer! Now I understand and will proceede the way you said!