Fernando,  if it’s BigBluebutton your referring to  a couple of things.

Since it is currently a flash client,  you are limited to codecs you can use.  BBB is using speex/16 which takes more cpu cycles to mix in mod conference.   Getting 8-10 speex users mixing takes up a standard core,   so you can project how it scales based on hardware thrown at it.

Also red5 is used for streaming video, etc, and this needs cpu cycles.

There are no limits to BBB in software, and you can run very much larger conference than 25 if you scale the hardware appropriately.  You can even distribute the app across multiple servers.

Getting a proprietary codec from client to FreeSWITCH would be a challenge.

The <25 in BBB forums is intended to set expectations for user setting up standard single server implementations.

Regards,

Stephen

Hostbbb.com

From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Fernando Hernandez
Sent: Thursday, May 16, 2013 3:41 AM
To: freeswitch-users@lists.freeswitch.org
Cc: 黃俊嘉; 蔡定一
Subject: [Freeswitch-users] New codec integration and concurrent calls limitquestions

Hello everyone,

we are working on a videoconferece platform with freeSWITCH integrated. Now we have a the possibility to try a new codec, proprietary, and we have never gone too deep with freeSWITCH. I have tried to take a look at the wiki but I didn´t find the answer to the next question,

Is it possible to integrate that new codec into freeSWITCH? according to the codec provider it is a G.279 implementation, with several improvements. Any licence issue? difficulty to achieve the integration? 

On the other hand, we also have another issue. I have checked freeSWITCH wiki trying to find any possible limit for concurrent calls, and according to it, it doesn't seem to be a limit of SIP but purely the RTP. But with the open source video conference platform we are working now this is limited to 25, and according to the developers it is due to the audio. Do you have any idea about this issue? We have run some test and we go over 25 people in the meeting freeSWITCH uses 125% of CPU (ref. 8 cores machine and each core represent 100% capacity => 800%), is this a normal behavior?

Thank you very much,

Fernando Hernandez