[Asterisk-video] MCU architecture

[Mitul Limbani]

Sergio,

This sounds pretty interesting, well I m actually not terrified when u  
said JAVA :p, we can help you over there since we have java developers  
on board.

I would also want to revisit this entire project coz the last time I  
did that I had to install A LOT (ye a lot) of dependent libraries.

Also as I mentioned earlier my goal is to make the whole install  
SIMPLE, so we might have to build in some sorts of shell script based  
installer or mebbe gotta build relevant RPMs( yeah terror for debian  
fans like me) but I clarified myself above "SIMPLE".

So let's coordinate n make things moving,

Regards,
Mitul Limbani,
Founder & CEO,
Enterux Solutions Pvt Ltd,
The Enterprise Linux Company(r),
http://www.enterux.com/


On 30-Jan-09, at 15:48, Sergio Garcia Murillo <sergio.garcia at fontventa.com 
 > wrote:

> Hi everyone,
>
> Currently the mcu solution has two main components, the VideoMixer and
> the mcuWeb.
>
> The videomixer component handles ONLY media, i.e. it receives rtp,
> unpack audio and video, performs audio/mixing video, encoding, packing
> and rtp sending. It is completely controlled by a xmlrpc interface and
> has no service logic at all.
>
> The current xmlprc api has the following methods:
>
> -Create/Destroy conference
> -Add/Remove participant to conference
> -Set conference parameters like video size and number and distribution
> of participants on screen
> -Set audio/video send/receive ports per participant
> -Set audio/video codec and parameters (size,fps) etc per participant
> -(Un)Mute participant
> -Set conference mosaic positions: lock slot, assign slot to  
> participant,
> etc..
> -Add watch only participant to conference (experimental: flash video
> broadcasting in web)
>
> It currently supports only h263p but should not be too difficult to  
> add
> support to h264. The rest of the functionalities are completed (except
> flash support) and only a bit of testing is needed. In the near  
> future I
> would like to convert the videomixer in a MediaServer, been able not
> only to offer multivideo conference services, but also transcoding,
> flash casting, etc..
>
> As I said before everything is controlled by an xmlrpc api, so a
> component handling the service logic and signalling is needed. That
> component could app_conference and the confiance project did integrate
> the video mixer as an external unit.
>
> I decided to implement it as a complete external unit from Asterisk.
> Why? I think it was easier quicker and easier to develop, avoid the
> monolithic and sometimes obscure architecture of asterisk and could
> provide much more functionalities. And the chosen technology was..  
> java
> (I feel a great disturbance in the Force, as if millions of voices
> suddenly cried out in terror and were suddenly silenced).
>
> Yes, Java, using the Sailfin Sip Application Server
> (https://sailfin.dev.java.net/) which allows to create an application
> that handles SIP and HTTP request (an application like click to dial  
> is
> just a few lines of code
> http://wiki.glassfish.java.net/Wiki.jsp? 
> page=SipClickToDialExample2). If
> you start with your prejudges about java, speed and show on, just  
> think
> that it is a telco grade Sun and Ericsson development.
>
> The mcuWeb component implement the service logic, handles all the SIP
> signalling (receiving invite request from asterisk), controls the  
> Video
> Mixer with the xmlrpc and offers a WEB UI to manage the conferences.
>
> This part is also fully functional, but I think that is where more  
> work
> is needed in order to customize the service with the functionalities
> needed by the customers. In particular questions like the following  
> need
> to be answered:
>
> - Is it required to create the conference before the user calls? or it
> get created when it calls in?
> - Are there private conferences? How are the participants allowed to  
> get
> in, by password or by invite only?
> - Is there always a default public room?
> - etc...
>
> Any thoughts are welcome
>
> Best regards
> Sergio
>
>
>
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