Independence Day Special Edition Interlaced ?

[iparout]

Hi there.

I am trying to encode the Special Edition of ID4 and I am facing the following weird phenomenon :

Although GKnot and DVD2AVI preview windows show that the picture is Interlaced (see attached photo), the output DivX video is *NOT* interlaced, even if I don't choose to deinterlace through GKnot !?!

http://users.panafonet.gr/iparout/ID4.jpg

How is this possible ? Has anyone experienced the same thing with this movie or other movies ?

Should I deinterlace no matter what, or will de-interlacing make the picture quality worse without showing any obvious advantage ?

Thanks in advance.

[TheWEF]

dvd2avi is wrong very often (especially about pal). just check with your eyes whether a movie is interlaced or not - easy to check in gknots video window (not resized), just look at an action scene...
pal hollywood movies are progressive 99.9%, porn usually is interlaced (because filmed with a video cam - ask hakko ;) )

of course quality is better if you do not deinterlace if you don't need to.

wef.

[iparout]

First of all, thanks for the reply.

I am not saying that the video is interlaced because DVD2AVI says so, but because it seems to be interlaced in the preview window of GKnot (see the screenshot in my first post).

It's just very weird.

[manono]

Hi-

Try Telecide() in the script (without Decimate) and see if that fixes it up. It could just be a case of shifted fields, and may not be truly interlaced.

[hakko504]

Originally posted by TheWEF
porn usually is interlaced (because filmed with a video cam - ask hakko ;) ) Who, me? :rolleyes: *looking guilty* :p

[iparout]

Originally posted by manono
Hi-

Try Telecide() in the script (without Decimate) and see if that fixes it up. It could just be a case of shifted fields, and may not be truly interlaced.

Hi.

I think you misunderstood something. Even if I don't do *ANY* kind of De-interlacing whatsoever (or Telecide), the output DivX file is already fixed (i.e. non-interlaced).

It makes me wonder why that happens, although the frames are *heavily* interlaced in the preview window of GKnot (screenshot) !?!

[manono]

Hi-

You're right-I did misunderstand. And I don't know the answer either.

hakko504-he can't mean you-it must be one of the other 503 hakkos.

[Iznogoud]

I have seen this too on numerous PAL dvd... D2A may say it´s interlaced or progressive, but you can see the "lines" in Gknot preview resized or not, but after encoding the avs without any de-interlacing the lines are gone and the result is fine... BUT if you encode the film using Vfapi/V-Dub the lines will be visible in the result, is this what you mean iparout? I don´t know the cause or the cure for it, but seems it doesn´t affect the use of avisynth so it´s not so big problem.

:confused: or is it? AAARRGGHH!! :scared:

Ps: It sure ísn´t my business, but hakko504 appears to be the first Swede and/or forum member who has ever even heard the word "porn".

[hakko504]

Is that so? (http://forum.doom9.org/search.php?s=&action=showresults&searchid=473245&sortby=lastpost&sortorder=descending) :eek: :devil: :rolleyes:

[iparout]

Originally posted by Iznogoud
I have seen this too on numerous PAL dvd... D2A may say it´s interlaced or progressive, but you can see the "lines" in Gknot preview resized or not, but after encoding the avs without any de-interlacing the lines are gone and the result is fine... BUT if you encode the film using Vfapi/V-Dub the lines will be visible in the result, is this what you mean iparout? I don´t know the cause or the cure for it, but seems it doesn´t affect the use of avisynth so it´s not so big problem.

:confused: or is it? AAARRGGHH!! :scared:

Yes, that's exactly what I am talking about... Do you de-interlace those movies no matter what ? Should I deinterlace them too, or should I leave it without deinterlacing ?

I have already encded the movie to DivX without using de-interlace but I am afraid to delete the vobs just in case it *IS* a big problem, so as to re-encode it with de-interlacing enabled.

[N_F]

Originally posted by Iznogoud
Ps: It sure ísn´t my business, but hakko504 appears to be the first Swede and/or forum member who has ever even heard the word "porn". That was a strange sentance I can't quite put my finger on :confused:



iparout: I don't know if those lines would count as interlaced. I've seen quite a few interlaced sources and none of them lookes like that screenshoot you showed us. They are usually very thin and only very obvious when there's moving, not over the whole screen as your screenshot shows.

Anyway, since the lines isn't there in the final movie I see no reason why you should use a de-interlacer. It'll give you a blurier picture and slow down encoding.

Something you could try if you have the opportunity is doing the same thing on another computer and see if you get the same problem.

[Iznogoud]

@N_F and hakko504

It was a bad example of Finnish humor, förlot mig.