Re: Skype and libv4l

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

	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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