Re: [Ekiga-list] Remote video display issue

[Chris Vine <chris cvine freeserve co uk>]

On Thu, 19 Nov 2009 11:31:53 +0530
Sohil Shah <sohil shah einfochips com> wrote:
> Hi,
>          To add to the below given details:
> I think this issue is somewhat similar to Bug #203885
> 
> https://bugs.launchpad.net/ubuntu/+source/ekiga/+bug/203885
> 
> "/A further data point on more testing.
> First, the problem also occurs on the windows version of ekiga,
> although less often. Secondly, it only ever seems to occur to the
> caller. The person called always seems to be able to see the remote
> video. For the caller, it seems to be a matter of chance, with not
> seeing the remote video being the more likely outcome.
> Both machines are 32 bit x86.
> Chris/ "
> 
> On 11/19/2009 11:11 AM, Sohil Shah wrote:
> > Hi,
> >           I am unable to see remote video on ekiga 3.2.6.
> >
> > Scenario:
> > When I connect 3 ekiga end points ( ekiga 3.2.6 ) with Aethra Vega
> > X3 MCU ( + endpoints ) using H.323 protocol, 1 or 2 endpoints can
> > see the remote video but the other end point(s) can see only local
> > video. Will it be one or two ekiga endpoints which can display
> > remote video is not predictable. Audio is transmitted and received
> > perfectly at all ends.
> >
> > Ekiga is running on windows XP desktop PC, Dell laptop with windows
> > XP and  a PC with Fedora 11.

It's also now in gnome bugzilla:
https://bugzilla.gnome.org/show_bug.cgi?id=601882

Just out of interest, are you using single core machines?  One user
reported on the launchpad bug that the problem ceased to manifest itself
when he used a dual-core machine.  There looks to be a race condition
and if the effect differs with the number of cores it would most likely
be caused by an incorrect use of threads.

Since (I believe) ekiga is not multi-threaded but opal is, it may be a
problem with the way in which ekiga interfaces with opal.  I had a
quick look at the ekiga and opal code but the relationships between the
library components was too complex, and my knowledge of voip too
limited, to make very much sense of it.

Chris