Re: Skype and libv4l

[Lamarque Vieira Souza <lamarque@gmail.com>]

Em Tuesday 24 March 2009, Markus Rechberger escreveu:
> On Tue, Mar 24, 2009 at 7:42 PM, Lamarque Vieira Souza
>
> <lamarque@gmail.com> wrote:
> >        It must be some problem in LD_PRELOAD, even setting
> > LIBV4L2_LOG_FILENAME the file is not created. I am running skype like
> > this:
> >
> > LD_PRELOAD=/usr/lib32/libv4l2.so /opt/skype/skype
> >
> >        /opt/skype/skype is the binary executable. There is not error
> > message about LD_PRELOAD or libv4l. Skype returns:
> >
> > Skype V4L2: Could not find a suitable capture format
> > Skype V4L2: Could not find a suitable capture format
> > Starting the process...
> > Skype Xv: Xv ports available: 4
> > Skype XShm: XShm support enabled
> > Skype Xv: Using Xv port 131
> > Skype Xv: No suitable overlay format found
>
> this is a problem of your graphiccard or graphic driver, look for
> xorg.org tweaks.

	Well, there are two problems above: the "Skype V4L2: Could not find a 
suitable capture format" and the "Skype Xv: No suitable overlay format found". 
I am trying to fix the first one for now, after that I am going to try to fix 
the other. As I said before the webcam works with Kopete (64-bit) and with 
mplayer (32-bit and 64-bit), so the Xv problem must be Skype specific, but I 
cannot test this problem until I fix the first one.

> Markus
>
> >        OBS: compat-ioctl32.ko is being used by the driver so it should
> > support 32- bit ioctl.
> >
> > Em Tuesday 24 March 2009, Lamarque Vieira Souza escreveu:
> >>       Hi,
> >>
> >> Em Tuesday 24 March 2009, Hans de Goede escreveu:
> >> > On 03/23/2009 09:08 PM, Lamarque Vieira Souza wrote:
> >> > >   Hi all,
> >> > >
> >> > >   I am trying to make Skype work with my webcam (Creative PC-CAM
> >> > > 880, driver zr364xx). By what I have found Skype only supports YU12,
> >> > > YUYV and UYVY pixel formats, which libv4l supports as source formats
> >> > > only and not as destination formats.
> >> >
> >> > YU12 is the same as YUV420 (planar) which skype does support. I assure
> >> > you that skype works with libv4l for cams which have a native format
> >> > which skype does not understand.
> >>
> >>       My fault here (+/-), I created a function to decode fourcc hex
> >> numbers to names and it returns V4L2_PIX_FMT_YU12 instead of
> >> V4L2_PIX_FMT_YUV420. I did not know they are synonyms. Anyway, it seems
> >> lib4l 0.5.9 (32-bit) is not working with Skype (32-bit) while lib4l
> >> 0.5.3 (64-bit) is working with Kopete (64-bit) patched to work with
> >> libv4l (no LD_PRELOAD). I will keep on trying to figure out why.
> >>
> >> > What is an other issue with skype is that it insists on asking
> >> > 320x240, so if the driver for your cam cannot deliver 320x240 and
> >> > libv4l fails to make 320x240 out of it in someway (see below) then
> >> > skype will fail.
> >> >
> >> > libv4l will crop 352x288 to 320x240 especially for skype, and it will
> >> > downscale 640x480 to 320x240 for the same reason.
> >>
> >>       The driver delivers 320x240 as default.
> >
> > --
> > Lamarque V. Souza
> > http://www.geographicguide.com/brazil.htm
> > Linux User #57137 - http://counter.li.org/
> >
> > --
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-- 
Lamarque V. Souza
http://www.geographicguide.com/brazil.htm
Linux User #57137 - http://counter.li.org/

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