[AG-TECH] Wierd problems with video using VIC in fedora 3/4

Jason Bell j.bell at cqu.edu.au
Sun Sep 4 06:54:41 CDT 2005

G'day Proshanta

Just as an idea, try lowering the frame rate on the cards to see if it
makes any difference...  ie, try using a very low frame and bandwidth to
see if it makes any difference.

Let me know how you get on.


From: owner-ag-tech at mcs.anl.gov [mailto:owner-ag-tech at mcs.anl.gov] On
Behalf Of Proshanta Saha
Sent: Saturday, 3 September 2005 3:37 PM
To: ag-tech at mcs.anl.gov
Subject: [AG-TECH] Wierd problems with video using VIC in fedora 3/4


I've been debugging a non-responsive vic window problem for days, what
happens is that for the first 5 mins, I get perfect motion on all 3
cameras. All of a sudden one of them will freeze up. Stoping the session
and staring it again causes vic to show a green window, and essentially
render that capture card useless. Still works under tvtime, just not
with vic. I am almost hitting a brick wall, ie. tried almost everything
I could to find out if it was my server(dual core dell 380s), capture
card (Hauppauge Winttv 401 c88xx version), linux (fedora 4), or the vic

Step 1: was making sure that the Wintv cards were all good, and had not
problem running simultaneously for hrs, a fair amount of burn in tests
were done, the tv cards all seem to be able to run at capture mode for
hrs with no problem. 

Step 2: was to see if vic was kind of not so nvidia friendly, the video
capture server has a dual head 128mb PCI-E, which I've heard people find
not so great to work with under linux. I personally did not find any
such problems, running at 1600x1200 just fine, perfect response time and
etc. But just for kicks I brought out a dual xeon dell box I had lying
around, with more than ample horse power with a pretty simple video
card, probably an intel i810 type of a card. Unfortunatley I faced the
same problem.

Step 3: Fedora 4 versus Fedora 3. So I decided to try Fedora 3 with some
spare hard disks. Fedora 3 seems surprisingly easy to setup AG with,
unlike the mountain I had to climb for Fedora 4. However, it seems to
also mysteriously freeze one of the vic screens, after which every
session would produce a greed screen on the frozen vic. Only a reboot
will fix the green screen problem. But then after 5 mins of starting AG,
I'm back to the frozen screen problem.

Step 4: AG2.3 versus AG2.4, I was very excited when I saw that the
screen did not freeze up after five minutes. But alas after about 15
mins or so I get a frozen window, and will show up as a green screen
everytime after that. Only a reboot will fix that problem, and would
eventually freeze up again.

Step 5::Move 1 capture card to another machine, as it seems to be able
to handle 2 just fine. But it appears that even in this case VIC would
cause a frozen screen on one of the windows. And the usual green screen
appears. The one with just 1 works perfectly. 

So I'm kind of running out of ideas, since the capture cards on their
own pass the burn in test. Software capture tests all pass. The VIC
however mysteriously causes a frozen screen followed by a green screen
in next vic startup. 

Any suggestions would be most welcome. Kind of running out of hair to
pull aswell. Thanks in advance.


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