Re: [GnomeMeeting-list] Unexpected behavior between GM and RadVision MCU after MCU upgrade

[Malcolm Caldwell <malcolm caldwell ntu edu au>]

On Sat, 2004-02-28 at 09:39, Craig Southeren wrote:
> On Fri, 27 Feb 2004 15:31:34 -0800
> "Kevin Oberman" <oberman es net> wrote:
> 
> ..deleted
> 
> > > This could be something as simple as the ViaVideo client using the H.263
> > > video codec, which allows larger video sizes than the H.261 codec
> > > supported by GM. Perhaps the new MCU does not support split screen for
> > > H.261 endpoints?
> > 
> > Now we are getting somewhere. This is just what I was looking for. I've
> > looked at debug logs for connects to both the old and new MCUs and see
> > the following for the new MCU:
> 
> ..deleted
> 
> > So the old MCU is sending CIF while the new is doing QCIF. The question

This was what I was going to suggest may be the problem.

Have you tried changing the video size for transmission from within gm? 
It *may* change what the mcu decides to send.

Also,  I would have a look around the mcu settings - there may be
options to change this behaviour.

> > is why? I presume it's something in the negotiation of the link, but I
> > don't know quite what to look for. I can set he debug level higher and
> > get all of the details, but it would be great to have some idea what to
> > look for. --debug=5 generates a LOT of stuff, most of which is not too
> > meaningful to me.
> 
> We need to look at the capability tables being exchanged during the call
> setup to determine what is happening here. My guess is that the new MCU
> has a different capability set from the old MCU, which causes a
> different video mode to be negotiated.
> 
> I'd be happy to look at some level 5 trace logs for calls with both MCUs,
> if you can email them to me direct (please compress them as well!). I'll
> post the relavant parts back to the list after analysing them.
>  
> > Again, thanks so much for your comments. At least I'm now moving in the
> > right direction.
> 
> No problems.
> 
>    Craig
> 
> 
> -----------------------------------------------------------------------
>  Craig Southeren, craigs postincrement com http://www.postincrement.com
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