From owner-freebsd-multimedia@FreeBSD.ORG  Tue Mar  6 16:54:52 2012
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Date: Tue, 6 Mar 2012 16:29:34 +0000
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From: Tom Evans <tevans.uk@googlemail.com>
To: Xavier xfm <xavierfreebsdmultimedia@gmail.com>
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Cc: freebsd-multimedia@freebsd.org
Subject: Re: PWCVIEW(1) say errors
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On Tue, Mar 6, 2012 at 3:48 PM, Xavier xfm
<xavierfreebsdmultimedia@gmail.com> wrote:
> Hi,
>
> Why PWCVIEW(1) don't work ?:
>
>> su
> Password:
> casa# pwcview -d /dev/video8
> Webcam set to: 320x240 (sif) at 5 fps
> libv4l2: error queuing buf 0: Invalid argument
> libv4l2: error queuing buf 1: Invalid argument
> libv4l2: error queuing buf 2: Invalid argument
> libv4l2: error queuing buf 3: Invalid argument
> libv4l2: error reading: Device busy
> Error reading from webcam: Device busy
> casa#
>
> Any idea ?
>
> Thanks.

What is /dev/video8? For a simple usb webcam, webcamd and pwcview work
perfectly for me:

> $ pwcview -s vga -d /dev/video0
Webcam set to: 640x480 (vga) at 5 fps

and I can then see my face.

Cheers

Tom