[AG-TECH] Vic Windows Coming & Going

Mike Daw mike.daw at man.ac.uk
Wed Apr 17 09:28:55 CDT 2002


It's not the bridge. (In fact, other sites going through our bridge seemed
to solve it.)

Where might I get rtpdump? (I can find documentation from Google, but no
executables.) If I was being lazy, I might also ask how I run it (do I just
point it at the mcast add/port of the VV?).
  -----Original Message-----
  From: Robert Olson [mailto:olson at mcs.anl.gov]
  Sent: 17 April 2002 14:40
  To: Mike Daw; AG Technical Developers (E-mail)
  Subject: Re: [AG-TECH] Vic Windows Coming & Going


  At 09:14 AM 4/17/2002 +0100, Mike Daw wrote:

    We seem to be getting a problem we've not seen before. Namely vic
windows
    disappearing and then immediately reappearing as a new thumbnail on our
    display machine. This seems only to happen to one video feed at a time
(i.e.
    not all windows at a site), but was happening yesterday to all
participants
    at one time or another.

  The only time I've seen that was in a VRVS session once. Is this through
one of your bridges perhaps?



    Does anyone know what causes this? And, better still, is there a
solution?

  Vic will drop the window when it thinks the stream is done. This could be
because it received an RTP BYE packet, or if the stream has not received any
traffic for a time. I'm not sure what sort of flaw in the video stream would
cause this. Catching a chunk of it with rtpdump for analysis would be good..

  --bob
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