[AG-TECH] Problems using webcam?

[Benjamin Khoo]

Hi Todd...
it is nice to know that someone out there is sharing my woe..

i have a Aiptek Camera which is supported through the ov511 drivers
using V4L.
All my other webcam applications works fine except AG.

A friend of mine was telling me that if we use a Webcam to connect in
Windows, there is a "resolution selection" option to ensure that the
resolution captured is not too high (beyond what the camera supports).

i have been looking at how i can setup the camera so that it only
captures at a certain resolution (e.g. 320x240) but i haven't gotten any
clues. i have looked at V4L as well as the ov511 drivers.

one thing i realized is that the v4l settings presented in the VIC menu
options corresponds only the the v4l controls given in the v4lctl
command. it doesn't allow any additional configurations.

my guess is that if like windows, we are allowed to choose the
resolution for capture, it should work...

Does anyone have a clue on how we can define the webcam capture
resolution in AG?


On Fri, 2004-07-30 at 01:51, Todd Zimmerman wrote:
> I'm having a similar issue using a Logitech Pro 4000 on FC 2.  The 
> Logitech drivers are slightly different in that you have to install the 
> standard pwc module plus the pwcx binary kernel module to get some of 
> the larger resolution capabilities - but I'm still getting the 'green' 
> output.
> 
> The camera works using xawtv and gnomemeeting - so I assume Vic is 
> asking for a resolution that the driver is not capable of delivering. 
> Any vic and/or webcam experts in the crowd??
> 
> Todd
> --
> Collaboration & Visualization Technician
> WestGrid - www.westgrid.ca
> IRMACS - www.irmacs.com
> Ph. 604.268.6979
> Todd Zimmerman - toddz at sfu.ca
> 
> 
> 
> Benjamin Khoo wrote:
> > hi
> > 
> > i recently got a V4L supported webcam hoping to be able to get it to
> > work under Linux with AG.
> > 
> > i managed to setup the VideoProducer to obtain the device of the webcam
> > under /dev/video0
> > 
> > however, i keep getting a blank Green screen for my own video feed.
> > investigation for the error messages shows the following errors..
> > is there anything i can do to limit the dimensions of the video?
> > 
> > my webcam can support up to a max of 640x480, it is a Aiptek model using
> > the ov511 drivers. i use FC2.
> > 
> > thanks lots for anyone's help in advance.
> > 
> > 14:59:32 kernel: drivers/usb/media/ov511.c: VIDIOCMCAPTURE: requested
> > dimensions too big
> > 15:20:54 kernel: drivers/usb/media/ov511.c: VIDIOCMCAPTURE: requested
> > dimensions too big
> > 15:22:25 kernel: drivers/usb/media/ov511.c: VIDIOCMCAPTURE: requested
> > dimensions too big
> > 
> > 
> > 
> > 
-- 
--
bENJAMIN kHOO
qIU wENDA
http://www.copperblue.per.sg