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Re: [pwc] Logitech QuickCam Pro 4000 and ioctl(VIDIOCMCAPTURE)?

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Subject: Re: [pwc] Logitech QuickCam Pro 4000 and ioctl(VIDIOCMCAPTURE)?
From: Luc Saillard <>
Date: Tue, 18 Jul 2006 08:19:28 +0200
On Thu, Jul 13, 2006 at 09:15:59AM +0200,  wrote:
> EHLO,
> 
> I've successfully setup this webcam on this system :
> 
> - Debian GNU/Linux "Sarge"
> - Kernel 2.6.8

your kernel is pretty old like debian sarge for many application.

> - PWC 10.0.12-rc1
> 
> But I don't get webcam picture with all softwares :
> - Xawtv does not work
> 
> ioctl: VIDIOCMCAPTURE(frame=0;height=120;width=160;format=7): Invalid
> argument
> ioctl: VIDIOCMCAPTURE(frame=0;height=288;width=352;format=15): No such
> file or directory
> ioctl: VIDIOCMCAPTURE(frame=0;height=288;width=352;format=15): No such
> file or directory
> ioctl: VIDIOCMCAPTURE(frame=0;height=120;width=160;format=3): Invalid
> argument

xawtv try a lot of resolution to guess the webcam. Try for example 

        # xawtv -geom 640x480

> Is that normal or did i forget something in my setup? (maybe an argument
> for the driver module to make it work with the VIDIOCAPTURE ioctl?)

If the resolution is not correct or the format of the picture is invalid. The
driver returns an error. The driver support only YUV420P.

Luc
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