[MPlayer-users] Encoding issues.

[Pablo Morales]

When I encode I se that mencoder detects telecine, and switch to inverse
telecine automatically,  I'm using pre3 under freebsd 4.8, anyway, do I have
to explicity tell mencoder to do inverse telecine?

Thanx

----- Original Message ----- 
From: "D Richard Felker III" <dalias at aerifal.cx>
To: "MPlayer usage questions, features, bugreports"
<mplayer-users at mplayerhq.hu>
Sent: Thursday, January 22, 2004 10:38 PM
Subject: Re: [MPlayer-users] Encoding issues.


> On Thu, Jan 22, 2004 at 03:29:45PM -0800, avery lewis wrote:
> > Hey guys,
> >
> > I'm rather new to the encoding scene, but I've RTFM'd a few times over
now,
> > and though I'm not getting everything, I get enough to get by..
> >
> > But I've got some issues.  :)
> >
> > I'm encoding animation using lavc, and I'll give you one of my example
> > cmdlines here:
>
> First of all, animation is almost certainly _telecined_, not
> _interlaced_, so you should not be using deinterlacers but inverse
> telecine filters.
>
> > mencoder dvd://1 -alang en -o /encode/output/ohpain_1.avi -ovc lavc
> > -lavcopts vcodec=mpeg4:vhq:vbitrate=1000 -oac mp3lame -lameopts
cbr:vol=3
> > -vop pp=(linblenddeint or mediandeint or 0x2000)
> >
> > Here's the problem I'm getting...
> >
> > If I encode at too high a bitrate (over 800) I get serious artifacts but
a
> > very nice picture quality.  Deinterlacing seems to be perfect.  I don't
> > know how to describe the artifacts exactly.. they usually happen when a
> > screen goes from something to nothing (black out before commercials,
etc).
> > It's sort of like what's described as freezed frames on
> > (http://www31.brinkster.com/kaiousama/artifacts.htm) except that it only
> > stays up for a second, and then goes away.
> >
> > However.. should I encode at a LOWER bitrate than 800, the major
artifacts
> > go away and I'm left with what's referred to as ringing (at least on
> > http://www31.brinkster.com/kaiousama/artifacts.htm)
> >
> > I'm really at a loss here.. I'm using lavc, but I've also tried xvid
(which
> > is way worse), and ffmpeg (equally bad).  Filesize isn't so much as
issue,
> > I'm willing to take files up to 200Mg on 22 minutes of encoded
animation.
> > I've tried variable bitrate, with no success.  Is the "perfect encode"
> > unattainable?  Am I chasing a dream?
>
> Well you should try proper inverse telecine, and see if the problem
> persists. If so, upload a clip of the source dvd that shows the
> problem and hopefully someone can identify what's causing it.
>
> Rich
>
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