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List:       theora
Subject:    Re: [theora] Poor encoding quality with etheora and aspect ratio
From:       Manuel Dahmen <manuel.dahmen () gmail ! com>
Date:       2008-02-29 18:44:33
Message-ID: 20080229194433.3b3e51e7 () manuel-desktop
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On Fri, 29 Feb 2008 09:55:22 -0800
Ralph Giles <giles@xiph.org> wrote:

> On 29-Feb-08, at 2:19 AM, Manuel Dahmen wrote:
> 
> > And when I play the movie with mplayer or totem, the video
> > resolution is changed from 640x480 to 854x480 (when i use  
> > ETHEORA_ASPECT_NORMAL in etheora_enc_setup).
> 
> This is a bug in etheora. It's passing the frame aspect ratio where  
> libtheora expects the pixel aspect ratio, which is why it looks  
> stretched.
> 
> For 640x480 computer-sourced video like processing produces, the  
> pixels are square anyway, but ETHEORA_ASPECT_PRESERVE is  
> unfortunately also wrong (it sets a square frame aspect ratio). So  
> you'll just have to wait until the bug is fixed.
> 
> (if you want to hack it, change the default aspect_numerator and  
> aspect_denominator in etheora.c to 1 and use ASPECT_PRESERVE.)
> 
>   -r

Thank you, -r.

I'll take a look at etheora.c and try to find a solution.

Bye.

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-- 
Manuel Dahmen
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