[MPlayer-users] Scaling interlaced video for DVD playback

[Neil Radisch]

No bother at all.

I can't help you with mencoder, I can just explain the process.

Capture the interlaced video as is (don't deinterlace or anything like
that).
Feed this interlaced video to an encoder application, but lie and say that
the
width is double and height is half.

The resultant encode shouldn't corrupt the interlace, so if it's played back
at it's original dimensions it should look correct on an interlaced device
(ie a TV).

Mencoder may or may not be able to do this. I don't use it so I have no
idea.

Neil


> > > > 2) Fake the width. Someone (Billy Biggs?) suggested this to me. Feed
> > > > the interlaced frame
> > > >     into the decoder, but tell the decoder that the frame is twice
as
> >
> > wide
> >
> > > > and half as high as
> > > >     it really is. This stops the encoder from "smearing" the
interlace
> >
> > and
> >
> > > > screwing up the motion.
> > >
> Hmm, then I don't understand. When exactly do I have to specify these
> parameters, during the mpeg encoding phase? Or directly during the first
live
> capture? And how exactly do I tell mencoder that the source is different
to
> what it detects?
> Sorry to bother! Thanks!
>