[MPlayer-users] please help test my mplayer widescreen converter wrapper script

[RC]

On Sun, 2 Jul 2006 09:39:46 -0500
"Daniel Manjarres" <danmanj2 at gmail.com> wrote:

> Would that work for a non wide-screen display? I wrote this script in
> a general enough way that it also works for 4:3 screens.

With a 4:3 video on a 4:3 display, -panscan wouldn't do anything, for
obvious reasons.

> > In fact I use a threshold of 30.

Typo. That should be 20, actually.

> Ok, now do it with white letterbox bars and I'll be happy. 

I don't have any such videos, nor have I ever seen one (same goes for
grey borders), so it's rather difficult to come up with a solution for
them.

> > Speaking of which, a round parameter of "1" won't work.  2 is the
> > minimum.  Few formats can be cropped to odd dimentions.
> 
> Oh yeah, It was 2 before, but crop detect outputed a y size of 404 and
> a y offset of 2 for a file with a height of 405 (404 + 2 = 406, 406 >
> 405) so it wouldn't play, so I changed it to a round of 1 with -zoom
> to make it work on that file. 

I don't think I was clear enough.  A round value of 1 is just ignored.

vf_cropdetect.c line 117:
    if (vf->priv->round <= 1)
      vf->priv->round = 16;

And you should upload that file with un-even dimentions so someone can
reproduce that problem, and fix that bug in MPlayer.

> I am curious about your script, why don't you post it so I can try it
> out?

Attached.  It's part of a much larger encoding script, so it's not very
user-friendly in this form, or fast.  You can speed it up by:

 reducing the number of rounds
 using -vo null instead of md5sum (old bug)
 using -nosound instead of -ao null 
 removing -identify and related code
 using pipes instead of intermediate files
 etc.

> do you handle that case, or is there some paramater to force
> cropdetect to not print crazy numbers?

None of the above.  I suppose those "crazy" values are just
statistically insignificant in my script.
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