[MPlayer-users] mencoder: ripping a dvd to a 700MB avi questions

Farrell Farahbod upgrdman at mindspring.com
Sat Jul 6 08:18:02 CEST 2002

I think it has to do with the way codecs encode movies....they split
them into 8x8 pixel squares, where are then arranged into 16x16 blocks
(2 wide, high). For an example of this, watch a dvd that is scratched,
and u will see some frames with a blocky messed-up picture. (this also
happens on dvd players with a dirty head or laser or whatever, or in AVI
downloaded over the Internet that are partially corrupted.)

On Fri, 2002-07-05 at 02:37, Dominik Benninger wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> > > use mplayer -voc cropdetect input.avi, but it's written in RTFM.
> > >              ^^^
> >
> > Actually, that's mplayer -vop cropdetect input.avi. (typo) :-)
> ok, it was a little late last night. ;-)
> > Cropdetect tells the absolute maximum cropping, though, and as such is
> > only half the story: it's always best to keep the resolution as a
> > multiple of 8 (I've heard 16 is better, but I've never had trouble with
> > 8). Anyway, this necessitates either scaling a bit differently or
> > padding the crop estimates slightly with very small black borders.
> also heard that. but what's the reason?
> db
> -- 
> Stallman is a saint in the Church of Emacs---Saint IGNUcius.
> http://www.stallman.org/saint.html
> _______________________________________________
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Farrell Farahbod <upgrdman at mindspring.com>

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