[GnomeMeeting-list] [Fwd: Re: http://smcc.demon.nl/anthill/query.php?bug=8]

[Damien Sandras <dsandras seconix com>]

-----Message suivi-----
> From: Damien Sandras <dsandras seconix com>
> To: Nemosoft Unv. <nemosoft smcc demon nl>
> Subject: Re: http://smcc.demon.nl/anthill/query.php?bug=8
> Date: 22 Sep 2003 21:41:51 +0200
> 
> Le lun 22/09/2003 à 21:24, Nemosoft Unv. a écrit :
> > Correct. Of course it's a matter of what you call a "problem". 640x480 
> > really is the largest size reported by the device. If gnomemeeting requests 
> > it, then it will get it.
> > 
> 
> GnomeMeeting relies on PWLib for portable video handling.
> What happens is that PWLib will work in 2 steps :
> - The first step is to set the colour format and create appropriate
> converters
> - The second one is to ask to the driver to capture to a give frame size
> 
> During the first step, PWLib will create a converter with default size.
> The default size is the maximum width x maximum height reported to be
> supported by the driver. It will fail because the driver doesn't support
> it if pwcx is not loaded. 
> 
> > However, since this size is determined during open(), it's easy to check if 
> > PWCX is present and adjust the maximum size accordingly. A report about 
> > this has been entered into the bugtracker. My question then is: suppose I 
> > implement this feature, and the maximum size is limited to 320x240, will 
> > gnomemeeting accept that without a problem? I know of some utilities that 
> > really insist on 352x288....
> 
> Yes, it should "crop" or "pad" the image with a black border. If you are
> doing a change to the driver, we can suggest you to try GnomeMeeting
> yourself with cameras that you think could break things. On our side we
> have ToUCam Pro, Vesta Pro Scan, and Logitech Quickcam PRO * to test
> too.
> 
> Anyway, I think that reporting a different value for max width and
> height when pwcx is unloaded shouldn't change anything with respect to
> this. But if I remember correctly you are padding yourself in the
> kernel, and perhaps you plan to remove this?
> 
> > 
> > Also, if the driver has to make a decision between either higher framerate 
> > or higher resolution, what would you prefer? Suppose you can choose between 
> > 320x240 30 and 640x480 15, what's more important (for gnomemeeting, that 
> > is).
> > 
> 
> GnomeMeeting only supports QCIF and CIF. So from the point of view of
> GnomeMeeting, higher framerate is more important than higher resolution,
> but the framerate will be limited by the available bandwidth anyway.
> 
> >  - Nemosoft
> 
> Thanks for your answer and for the quality of your driver (I'm using it
> to code on GnomeMeeting since 3 years and suggesting philips-based
> cameras to users in general)
> -- 
> Damien Sandras <dsandras seconix com>
-- 
 _	Damien Sandras
(o-	GnomeMeeting: http://www.gnomemeeting.org/
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