Hi Melchior,

On Saturday 31 October 2009 21:15:08 Melchior FRANZ wrote:
> Hi,
> 
> * Laurent Pinchart -- Saturday 31 October 2009:
> > Could you please tell me the commercial name of the webcam, or in which
> > laptop model it can be found ?
> 
> I didn't mention that because the shop sells it under its own brand as just
> "Conrad Webcam mit Schwanenhals" (engl. "Webcam with Gooseneck") and an
>  article number (97 19 72). There's no producer mentioned or a 'proper'
>  article name. Just see the link that I posted -- that's all there is, and
>  nothing more on the box:
> 
>  
>  http://shop.conrad.at/ce/de/product/971972/CONRADWEBCAMMITSCHWANENHALS/132
> 0051
> 
> This cam is separate, not built into a laptop. Interesting design:
> 
>  
>  http://shop.conrad.at/medias/global/ce/9000_9999/9700/9710/9719/971972_AB_
> 00_FB.EPS_400.jpg
> 
> I assume(d) that it's produced by some "no-name" company (no, I don't mean
> eMPIA), and that every seller just slaps its brand on it. Then it would
> probably also be available under different, possibly better known names.

Thanks for the information.

> > >   $ cat /dev/video0
> > >   cat: /dev/video0: No such device
> > >
> > > although that device node works for video software.
> >
> > That's normal. The uvcvideo driver doesn't support the read() method.
> 
> Well, but the answer is still wrong and misleading. Wouldn't it be better
> to just return no data? IOW: the device *does* exist, but doesn't return
> anything that way.

Good point. The driver currently returns -ENODEV while the V4L2 spec states 
that it should return -EINVAL instead. I'll fix it.
 
> > Your luvcview version defaults to MJPEG and doesn't fall back to YUV
> > automatically. Your camera supports YUV only, so the default won't work.
> > luvcview -f yuv should work.
> 
> Oh, indeed! Thanks. (BTW: I had also tried the latest version from
> SVN (r19), but that doesn't compile due to missing header files.)

Could you complain to the luvcview maintainer on quickcamteam.net ? :-)

> > >    Oh, right. That's *so* going to work well. 500% enlargement through
> > >    interpolation, or "making up 24 pixel for every given pixel".   :-}
> 
> BTW: there are apps which deliver quite reasonable 500% or more
>  enlargement, but they'd be too slow for live pics. This Qt4/GPL3 one, for
>  example:
> 
>   http://imageenlarger.sourceforge.net/
>   $ svn co
>  https://imageenlarger.svn.sourceforge.net/svnroot/imageenlarger/trunk
>  imageenlarger $ qmake && make
> 
> Worth trying out if you are into such things!  :-)

-- 
Regards,

Laurent Pinchart
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