You appear to be using H.261! I am surprised that still works at all! It is certainly so old that it never gets tested.

You might have better luck if you install FFMPEG and x286 and/or VP8.

Robert Jongbloed
OPAL/OpenH323/PTLib Architect and Co-founder.
Commercial support at

On 4/06/2014 9:44 PM, Ashok Kumar wrote:
Hi Robert,

Today I pulled the opal and ptlib code from following link :

To extract a stable branch of OPAL and PTLib, use the following commands

svn co svn checkout svn:// ptlib
svn co svn checkout svn:// opal.

After building ptlib-opal, I compiled opalmcu and ran it.
I saw that it is getting crashed as soon as the second member get added to the conference.

Please find the attached log file < opalmcu.log> and the gdb back trace output file.

Please let me know if this is a genuine issue or if am I doing something wrong?


On Wed, Jun 4, 2014 at 10:05 AM, Robert Jongbloed <> wrote:
Apologies for taking so long.

This is now fixed in the Lacaille SVN branch HEAD.

Robert Jongbloed
OPAL/OpenH323/PTLib Architect and Co-founder.
Commercial support at

On 24/04/2014 9:01 PM, Pradeep Kumar wrote:
Hi All,

I've the latest, Lacaille, svn for opal-3.14 & ptlib-2.14. I compiled mcu sample example, but it did not work.What happens, end point is able to show its own video, instead of mixed video of all other including itself. Whereas, same test works fine with Eridani.

Please tell me if I need to do something else for Lacaille. 

Pradeep Kumar 

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