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

[Ivan Kowalenko]

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On Jul 1, 2006, at 21.23, Daniel Manjarres wrote:

> Oh yeah, I forgot to talk about ntsc overscan, and how to avoid  
> losing part
> of the video to overscan sometimes broadcasts are letterboxed on all 4
> sides, which sucks when played back on a computer where there is no
> overscan. Also simple cropdetect fails if your crop detect window  
> falls on a
> purely black part of the movie.

Well, that's not THAT big a problem. If we're talking about a pre- 
recorded or stored video file, grab the aspect data out of the file  
(assuming we're dealing with overscan ONLY), jump forward thirty  
seconds, running in video decoding only, null output, benchmark mode,  
and then use CropDetect and have it run until it gets something near  
the proper aspect ratio.

The problem is when you have non-overscanned material, but straight  
up letterboxed stuff, where the aspect ratio can't be pulled from the  
file (either as resolution data or metadata), and things like Red vs.  
Blue where something like 2.35:1 (Don't know the full res) is jammed  
in 4:3 and they stick subtitles in the blank space below (Lopez is  
hard to understand, even if you understand Spanish!).

XBMC has a feature very similar to what you're crafting for MPlayer.  
It's VERY useful, but it does happen to have the problem of cropping  
out RvB subtitles. You might want to check out how the XBMC crew  
manages to make this work. Given that XBMC is also an OSS project,  
and given that they're relying on MPlayer for their project, I'm sure  
they'd be willing to collaborate on this.

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