[AG-TECH] 2.2 video problems.

Victor M. Babson, Jr. vbabson at secsg.uga.edu
Tue Aug 17 10:41:36 CDT 2004


Thanks for the response.  It gave me some ideas...

Okay everyone,

So I can force vic to show my video streams, but I still can't get the
NodeSetupWizard to acknowledge them...

Here's what I did...

I started AGServiceManager (attached AGS2.OUT output)

Then I started the NodeSetupWizard (attached NODES.OUT) which again only
showed x11 as a video source.

So I started up the Venue Client and then started an AGNodeService instance
(AGN.OUT).  Adding the localhost as a service manager and adding a
VideoConsumer service along with a VideoProducer service (again only x11
visible), I then see ~.AccessGrid/local_services/VideoConsumerService and

I initiate vic using ./vic localhost/1283 (VIC2.OUT)  I then manipulate the
port and device and lo and behold I see my video feed.

So, did I find a bug?  What do I win?  Can I win a fix if I can't create


----- Original Message ----- 
From: "Douglas Kosovic" <douglask at itee.uq.edu.au>
To: <ag-tech at mcs.anl.gov>
Sent: Sunday, August 15, 2004 9:06 PM
Subject: Re: [AG-TECH] 2.2 video problems.

> Hi Vic,
> > So I had this linux box with 2.1.2 working just fine.
> >
> > Now that I have removed 2.1.2 and installed 2.2 I can't seem to get
> > any video feed working.  I installed xawtv (wasn't installed for
> > 2.1.2 -- but v4l2 was).
> >
> > When running a prog like xcam, I can see my video feed just fine.
> > When I try using xawtv, however, I get a blank screen.  I've tried
> > xawtv 3.54 to 3.93.
> It would be better to test it with vic, which can be found in a subdir of
> ~/.AccessGrid/local_services/ , assuming you've enabled at least one of
> Video Services in AGTk.
> Only v4lctl is used from xawtv, you could try the following to see if it
> detects the input ports:
>    /usr/bin/v4lctl -c /dev/video0 list
> > I've seen some posts that say I should edit the videopath in
> > /usr/lib/python2.2/site-packages/AccessGrid/Platform/unix/Config.py
> > to point to /dev instead of /proc/video/dev.  I've done this, but it
> > just makes the x11 feed disappear.
> You might want to have a look at the following log:
>  ~/.AccessGrid/Logs/ServiceManager.log
> or use the --debug switch with ServiceManager.py to see if there is any
> useful diagnostic info.
> The V4L devices might be busy (i.e. you have other applications accessing
> the V4L devices) when the ServiceManager tries to interogate them for
> input ports.
> Cheers,
> Doug
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