[GnomeMeeting-list] Re: Problems with V1.0.1 on Via C3/Fedora Core 1

["Damien Sandras" <dsandras seconix com>]

Hello,


Le 6/3/2004, "Les LaZar" <les_lazar compuserve com> a écrit:

>Damien,
>
>Thanks for your response.
>
>Regarding GM crashing with Floating Point Exception upon receipt of incoming
>call:
>
>Prior to gettting your message, we reformatted the HD on one of the systems
>(the one with GM 1.00 compiled from the sources) and reinstalled FC1 and
>Alsa to get a "clean" environment for installing GM (losing the saved
>bactrace in the process) .  We then reinstalled GM 1.00 from the RPM's.  It
>still crashed, so, without saving a new backtrace, we removed the GM 1.00
>and installed GM 0.98.5 from the FC distro.
>
>Now we have GM 0.98.5 on one system and GM 1.00 (from RPMs) on the
>other...and no crashes.  I had expected the GM 1.00 to crash when receiving
>a call, but no.  They can both initiate and receive calls now without the
>crash.  I find it very disturbing when a problem goes away for no apparent
>reason....I neven know when it will return!


There is a bug in OpenH323 making OpenH323 crash when LPC-10 is used.
Please have a look in the history to see if it is the case. Then it
would explain the crash. We'll try to have this fixed in 1.0.1 where
LPC10 won't be usable anymore.

>
>I plan to reinstall GM 1.00 from the RPMs on the system with GM 0.98.5 and
>see what happens.
>
>In the meantime, some other questions:
>
>On the system currently running GM 1.00....ALSA sound modules are installed,
>but the GM Audio Device preferences list only OSS and Quicknet as potential
>"Audio Plug-in".  The program seems to function correctly with OSS selected,
>buy why wouldn't ALSA be listed as a choice?
>


Probably because you have not installed the ALSA plugin from the
downloads section. It is called pwlib-plugins-alsa or similar.

>I am attempting to get the best possible video quality (30fps and highest
>resolution) and audio quality.  What are the likely bottlenecks and
>tradeoffs in setting the codec parameters considering the two systems are
>linked via a 100Mbs LAN with no contention?
>

With such a bandwidth, you can use the highest video quality available.
The only bottleneck could be packets loss or your video driver. I know
no driver able to go up to 30FPS on Linux. But setting 30 FPS in GM will
ensure it is catpuring at the highest possible rate.


>I note that the H.323 spec provides for optional video resolutions greater
>than CIF (320 x 240).  Could GM be easily modified to offer the higher
>resolutions?
>

Not easily, but it can be done. However, you have to know that most
drivers do not support more than CIF.

>Speaking of modifying GM....I have briefly examined the sources....there is
>a lot there.  Do you have any documentation on the design of GM?  I


Only in french and there is relatively few.

>understand it was a thesis project...could I get a copy of the thesis?  I am

Not sure about this, I don't know what the university allows.

>working on a telepresense project and GM does much of what I need, and a
>whole lot more.  Any pointers you could provide for getting a summary of the
>internals would be helpful.  Of course I would credit your assistance.
>
>Regards,
>
>Les
>
>
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