Deinterlace or not?

[perdomot]

I'm backing up some DVDs which are in NTSC 29.97 format and am not sure if I should deinterlace or not. I plan to use Divx to encode the vobs and then make a normal DVD with Nero that will play on the desktop DVD player. I use VDub and there is a deinterlace filter but I am not sure about this and want to have the best image quality possible. Thanks.

[junkmalle]

Are you sure your DVD is 29.97 fps interlaced not 23.976 fps marked for 3:2 pulldown? Most DVDs are the latter.

Are you using VirtualDubMPEG2 or VirtualDubMod?

[perdomot]

Yes its 29.97 Interlaced according to DVD2AVI. I will be using VirtualdubMod. Should I leave it interlaced or deinterlace with filters?

[junkmalle]

I'm not sure how DVD2AVI reports frame rates. Some programs always tell you NTSC is 29.97 fps interlaced because that's the only thing you can send to an NTSC TV.

When you open the VOB file with VirtualDubMod look at File -> File Information. Does it say 23.976 fps or 29.97 fps? That is the true encoding of frames within the file.

[lordsmurf]

I plan to use Divx to encode the vobs and then make a normal DVD with Nero that will play on the desktop DVD player.

Why?

[GreyDeath]

DVDShrink

[junkmalle]

At first I thought you were making Divx files for a Divx/DVD player. But if you're making regular movie DVDs why don't you just rip the DVDs with DVD Decryptor then run DVDShrink? There's no need to convert to Divx as an intermediate. In fact, I don't think DVDShrink will even do anything with Divx files.

[perdomot]

I use dvd shrink for single movies but this is a bunch of anime episodes and I want to get them on as few dvds as possible while still maintaining quality. The question remains though, should I deinterlace when encoding? If I understand correctly, the Nero made DVD will be interlaced so does it affect quality if I deinterlace?

[NoodleMaps]

If you plan on watching these on your Television set and not your computer monitor and you are sure they are truly 29.97, which I have my doubts being they are anime, then I would leave them interlaced.

[junkmalle]

Yes, if they're interlaced, leave them interlaced. All forms of deinterlacing (except inverse telecine) are destructive to the picture.

Divx is not the same as MPEG2. Divx is not compatible with most DVD players. There are some that can play Divx AVI files though. If you have one of these players it probably can't play interlaced Divx files properly. In that case you may want to deinterlace.

[Bodysurf]

Divx is not the same as MPEG2. Divx is not compatible with most DVD players. There are some that can play Divx AVI files though. If you have one of these players it probably can't play interlaced Divx files properly. In that case you may want to deinterlace.

Right. You would think since they play interlaced DVDs (MPEG-2 content) just fine, that DivX/XviD would be the same. And if you thought that, you would be wrong.

My Philips DVP642 plays interlaced XviD files horribly. Lots of banding and artifacts, especially in high motion scences that goes away if the AVI is deinterlaced instead.