[AG-TECH] AG in a virtual machine

[Douglas Kosovic]

Hi Jon,

With kernel 2.6.27 and later, VIC needs to built with the libv4l
package, as the proprietary pixelformat support for that webcam has be
moved from the kernel driver to the userspace libv4l package (which now
does the conversion to more common pixelformats).

Chris has rebuilt the Ubuntu AG VIC package with a dependency on the
libv4l package, try updating the VIC package and see if it fixes your
issue.

You can confirm that you have a vic built with the libv4l package by
issuing:

$ ldd /usr/bin/vic | grep libv4l
	libv4l1.so.0 => /usr/lib/libv4l1.so.0 (0x00890000)
	libv4l2.so.0 => /usr/lib/libv4l2.so.0 (0x00884000)
	libv4lconvert.so.0 => /usr/lib/libv4lconvert.so.0 (0x00897000)

Cheers,
Doug

Jon Johansson wrote:
> Hi Doug,
> 
> When I select the V4L2 device and then select Transmit, I get:
> jonj at ubuntu:~$ vic 234.5.6.7/12000
> Attached to V4L device: V4L-USB Camera (046d:08ad) /dev/video0
> Attached to V4L2 device: V4L2-USB Camera (046d:08ad) /dev/video0
> Segmentation fault
> 
> When I select the V4L device and then select Transmit, I get:
> jonj at ubuntu:~$ vic 234.5.6.7/12000                              
> Attached to V4L device: V4L-USB Camera (046d:08ad) /dev/video0  
> Attached to V4L2 device: V4L2-USB Camera (046d:08ad) /dev/video0
> ioctl VIDIOCSYNC: Invalid argument                              
> Syncerror SyncCount 1                                           
> ioctl VIDIOCSYNC: Invalid argument                              
> Syncerror SyncCount 1                                           
> ioctl VIDIOCSYNC: Invalid argument                              
> Syncerror SyncCount 1
> ...
> 
> and there is a video stream displayed (NTSC) but it's green as
> shown in the attached image. Trying Pal and Secam doesn't change
> this.
> 
> With a bit more care adding services to the venue client, 
> I can add either a VideoService, or a VideoProducerService pointing
> at the V4L source, but the producer vic doesn't start - I do get
> a consumer vic though, just "Waiting for video...". 
> Disabling and enabling the video results in a vic window appearing
> briefly, just a flash of the frame, and then it disappears. 
> 
> Thanks,
> Jon.
> 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ~~   Jon I Johansson, Ph.D.              * Tel.: (780) 492-9304   ~~
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> ~~   Visualization Analyst       http://sciviz.aict.ualberta.ca   ~~
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> 
> -----Original Message-----
> From: ag-tech-bounces at lists.mcs.anl.gov
> [mailto:ag-tech-bounces at lists.mcs.anl.gov] On Behalf Of Douglas
Kosovic
> Sent: Tuesday, May 26, 2009 6:14 PM
> To: Jon Johansson; ag-tech
> Subject: Re: [AG-TECH] AG in a virtual machine
> 
> Hi Jon,
> 
>> Xawtv grabs the Logitech camera and shows video just fine, but
>> vic chokes and dies with either v4l or v4l2 as a source.
> 
> What is the console output of vic? i.e. start vic on the command-line
> and then click transmit in the GUI, e.g.:
>    vic 234.5.6.7/12000
> 
> The error output might give a hint.
> 
> 
> Doug