Re: [GnomeMeeting-list] My cpia_usb initialization problem

[Damien Sandras <dsandras seconix com>]

It simply means that your camera has problems with YUV420P colour
format.

You should run gnomemeeting with the -d option and mail me what you see
in the output when you click on the preview button and that it fails.

Doing so, we can see what exaclty fail and put some tips in pwlib for
your particular webcam and it will always work.

PS/ the order in which you call the Set* functions should not have an
effect on the driver.

Damien

le lun 19-11-2001 à 07:38, Arthur Kahlich a écrit :
> I am running Redhat 7.1, with the kernel updated to
> 2.4.3-13, using the cpia_usb kernel module that comes
> with it from Redhat, with the gnomemeeting-0.11 rpm's
> for both sources and binaries, except where re-compiled.
> 
> With this change, the initialization on video test may
> fail the first time, but it suceeds in subsequent tries.
> Before, it would only fail.  The difference is that all
> of the setup calls are done regardless of previous
> failures, rather than quitting at the first failure.  When
> I did this the first time by commenting out individual
> terms to see which was giving the failure, it was in
> the SetColourFormatConverter call.  There may be
> an order dependency there, but I wasn't able to get
> it to work by merely moving that call to the end.
> There is some driver state being affected, because
> once the camera has been initialized properly by
> my changed version of gnomemeeting, I can then
> exit and run the unchanged version, and it works
> fine until I unplug and re-plug in the camera, then I
> have to run the changed version to get the setup
> right again.
> 
> Included below are my changes to the webcam.cpp file,
> with the old file first, changed file second:
> 
> 157,164c157,164
> <   if (grabber->Open (opts->video_device, FALSE) &&
> <       grabber->SetVideoFormat
> <       (opts->video_format ? PVideoDevice::NTSC : PVideoDevice::PAL) &&
> <       grabber->SetChannel (opts->video_channel) &&
> <       grabber->SetColourFormatConverter ("YUV420P") &&
> <       grabber->SetFrameRate (opts->tr_fps)  &&
> <       grabber->SetFrameSizeConverter (height, width, FALSE))
> <
> ---
> >   if (grabber->Open (opts->video_device, FALSE)
> >       && (grabber->SetChannel (opts->video_channel)
> >       & grabber->SetVideoFormat
> >       (opts->video_format ? PVideoDevice::NTSC : PVideoDevice::PAL)
> >       & grabber->SetColourFormatConverter ("YUV420P")
> >       & grabber->SetFrameRate (opts->tr_fps)
> >       & grabber->SetFrameSizeConverter (height, width, FALSE)
> >       ))
> 189a190
> >       // this assumes that delete will close first...
> 
> I hope this is helpful in making the code more robust.
> 
> Art
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