[MPlayer-users] Re: Cropdetector

[Dominik 'Rathann' Mierzejewski]

On Friday, 23 July 2004 at 04:01, rcooley wrote:
> On Thu, 22 Jul 2004 16:43:37 +0100
> Martin Collins <martin at mkcollins.org> wrote:
> 
> > With some material it can give dodgy results.
> 
> cropdetect is as reliable as you allow it to be.
> 
> > For example I have a
> > video of some wire-frame graphics with a black background. Everytime
> > the graphics change so does cropdetect's output.
> 
> cropdetect, unless it's been changed recently, will find the border for
> a frame, then start on the next frame.  If it sees a frame with larger
> dimentions, it changes to match the largest, and keeps the largest, even
> if it finds a frame with smaller video dimentions (larger border).
> 
> So, the more frames you let it process, the more accurate it should be.

Unless you're trying to crop some letterboxed music video with station
logo partially in the black border. I find automation is a Bad Thing(tm)
at almost every step of video encoding process.

R.

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