[MPlayer-users] Re: Cropdetector

[Meino Christian Cramer]

From: Martin Collins <martin at mkcollins.org>
Subject: [MPlayer-users] Re: Cropdetector
Date: Wed, 21 Jul 2004 17:00:38 +0100

Hi Martin !

 Thanks again for your valuable help ! :)

 Do you know the state of the Large File Support in recent kernels of
 Linux (2.6.7) ?

 Otherwise extracting the video in one big file is not a good idea
 since it normally exceeds 2Gigs.

 Then I have to fallback to the "cat * | mencoder" solution.
 I read the manpage of mkvmerge  -- it seems to support multiple files
 of one kind (video) and one of another kind (audio).

 Or am I wrong?

 Have a nice evening!
 Meino

> On Wed, 21 Jul 2004 15:15:42 +0200 (CEST)
> Meino Christian Cramer <Meino.Cramer at gmx.de> wrote:
> 
> >  When using -cropdetect with mplayer, mplayer will spit out a
> >  thousands of partly different lines.
> > 
> >  What do you think is a good (and in a script programmable)
> >  algorithm to extract a good choice of boundaries? These values
> >  should be the base of a "sweet-sixteen"-filter, which alined the
> >  boundaries.
> 
> I don't think this is a good candidate for automation, I use 
> -vf rectangle and my eyes. However, if you really want to do it the
> safest way is probably to find the minimum dimensions given by
> -croptdetect and round them down to be divisible by 16. Add half the
> difference to the offset. You will probably end up cropping more than
> necessary.
> 
> Martin
> 
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