Re: xawtv 'webcam' & uvcvideo webcam: ioctl error

[Hans de Goede <j.w.r.degoede@hhs.nl>]

Colin Brace wrote:
> Hi all,
> 
> I am trying to get the 'webcam' utility of xwatv working with my uvcvide 
> webcam, a Creative Optia. My Fedora 9 system recognizes the webcam fine; 
> here is the dmesg line:
> 
> uvcvideo: Found UVC 1.00 device Live! Cam Optia (041e:4057)
> 
> The webcam works with apps like Skype.
> 
> I'd like to configure it to upload images periodically to my website 
> using the xawtv 'webcam' utility. I create ~/.webcamrc as indicated in 
> the man page, but when I run it, it return an error message:
> 
> $ webcam
> reading config file: /home/colin/.webcamrc
> video4linux webcam v1.5 - (c) 1998-2002 Gerd Knorr
> grabber config:
>  size 320x240 [16 bit YUV 4:2:2 (packed, YUYV)]
>  input Camera 1, norm (null), jpeg quality 75
>  rotate=0, top=0, left=0, bottom=240, right=320
> write config [ftp]:
>  local transfer ~/Desktop/uploading.jpeg => ~/Desktop/webcam.jpeg
> ioctl: VIDIOC_DQBUF(index=0;type=VIDEO_CAPTURE;bytesused=0;flags=0x0 
> [];field=ANY;;timecode.type=0;timecode.flags=0;timecode.frames=0;timecode.seconds=0;timecode.minutes=0;timecode.hours=0;timecode.userbits="";sequence=0;memory=unknown): 
> Invalid argument
> capturing image failed
> 
> Any ideas what is going wrong here?

I think I do, xawtv contains a few v4l2 handling bugs. This patch fixes them 
and most likely fixes your issue:
http://cvs.fedoraproject.org/viewvc/devel/xawtv/xawtv-3.95-fixes.patch?revision=1.1

Regards,

Hans


> 
> TIA
> 

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