On Wed, 2002-05-15 at 11:02, Adrian Cox wrote:
> On 15 May 2002 00:05:59 +0200
> Michel D <[EMAIL PROTECTED]> wrote:
> 
> > On Mon, 2002-05-13 at 22:04, Rogério Brito wrote: 
> > > On May 12 2002, Michel Dänzer wrote:
> > > > 
> > > > Well, the actual movies shouldn't be interlaced.
> > > 
> > >   Well, I read that also in Ben's reply and got surprised, since
> > >   without exception all DVDs that I have seen to this day are
> > >   interlaced.
> > 
> > Sounds like bad encodings. The original movies as shown in theaters 
> > obviously
> > aren't interlaced so if a DVD is that's purely artificial.
> 
> Are you sure about this? I thought most DVDs carried either interlaced
> NTSC or interlaced PAL.  In the NTSC case the movie is converted to
> 30fps interlaced by a 3:2 pulldown (3 fields from one frame, 2 fields
> from the next). In the PAL case each frame is split into two fields,
> which speeds the film up slightly. Adjusting the pitch of the audio is
> optional in this case. I believe that in both cases this is normally
> done when mastering the DVD, to allow for manual tweaking of the
> process.

You're right, forgot about this, but in the PAL case the two fields are
basically the same as one frame, right? Maybe that's why I haven't
noticed any interlacing yet.


-- 
Earthling Michel Dänzer (MrCooper)/ Debian GNU/Linux (powerpc) developer
XFree86 and DRI project member   /  CS student, Free Software enthusiast


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