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Re: OPAL autoenables video?: msg#00368

telephony.openh323.general

Subject: Re: OPAL autoenables video?

Okay, there are a couple of issues related with this bug:

1)
When using dynamic linking for PWLib/OPAL, not all media formats are registered at startup.
This causes the missing media formats to be created & registered after receiving the terminalCapabilitySet request PDU from the remote side. That's why video does not work in the first call.
When linking the libraries statically, this problem does not exist.

I know that Robert Jongbloed did a couple of changes recently, addressing some capability issues, so eventually a bug popped out there. (I don't know how it was before the changes, actually).
Also, I don't know whtere this is (again) a platform-specific problem since all these problems were observed on my MacOSX machine.
On the x86-debian machine, I could only run simpleopal linked statically (make optnoshared), so I don't know how the situation there is when linked dynamically.

2)
Although video is disabled, there is still a incoming H.261 video stream opened. This stream is closed from the remote party right after it's opening since OPAL never sends a reponse openLogicalChannelAck PDU for this stream.

3) Although the opened h.261 video stream never gets confirmed by OPAL, OnOpenMediaStream is called.
OnClosedMediaStream is never called, however.

I hope to have made these things clear... if not, please ask... In the meantime, I'll try to find out more

Hannes

Am 22. Feb 2005 um 22:00 schrieb Hannes Friederich:


Am 22. Feb 2005 um 21:11 schrieb Damien Sandras:

I can tell you nobody has worked on that, so you are free to do it.

However, if you set autoStartReceive/TransmitVideo to FALSE, it
shouldn't happen.

Yes, it shouldn't, but it does... I'll have a closer look at this

Le mardi 22 février 2005 à 21:06 +0100, Hannes Friederich a écrit :
I have noticed that the second time the opal-application (simpleopal or
XMeeting) has a call with another endpoint, video streams are opened in
both directions even if video is disabled.

I'd like to offer my help in debugging the opal library, but I don't
want to spend time on bugs others are working on or have already
fixed...

Hannes

--
_ Damien Sandras
(o- GnomeMeeting: http://www.gnomemeeting.org/
//\ FOSDEM 2005 : http://www.fosdem.org
v_/_ H.323 phone : callto:ils.seconix.com/dsandras@xxxxxxxxxxx



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