Re: [GnomeMeeting-list] ratio problem with NTSC camera

[Damien Sandras <dsandras seconix com>]

Le lun 20/01/2003 à 02:16, Florin Andrei a écrit :

> 
> > Check that it is not your driver.
> 
> How do i do that?

Try to force the 176x144 or 352x288 format with another program to check
that you don't have the same problem.

> 
> > what GnomeMeeting is doing is requesting QCIF size to the driver and
> > displaying the buffers it gets. If the ratio is not correct, it is
> > because your driver sends back a picture with an incorrect ratio.
> 
> So, basically you're saying it is the bttv driver that provides the
> wrong format, is that what you're saying? (i'm using the standard bttv
> driver to get my Bt878 card working, and my camcorder is connected
> through the Bt878 to the computer)

I think, but I'm not sure, that the driver is "scaling" the picture in
176x144 from a 120x160 picture, or in 352x288 from 320x240. GnomeMeeting
is unable to do that, so I guess it can only be the driver...
What you can do if it is disturbing, is adding a hint in
pwlib/src/ptlib/unix/video4linux.cxx for your driver, and "tell" to
pwlib to open your device in 120x160 or 320x240, but "crop" the picture.
That way, you will have a black border around the picture. That is what
the driver should do IMHO.

-- 
 _	Damien Sandras
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