[Asterisk-video] How to know if video call is comming?

Wed May 13 10:39:27 CDT 2009

Thank you Borja, it works.

Best regards,

- Zelalem S. 

> Date: Wed, 13 May 2009 14:38:31 +0200
> From: borja.sixto at i6net.com
> To: asterisk-video at lists.digium.com
> Subject: Re: [Asterisk-video] How to know if video call is comming?
> 
> The patch is only for the ISDN Bearer Capability....
> For SIP you not need to touch your Asterisk sources.
> 
> Regards,
> 
> 
> Borja from i6net
> 
> Zelalem Sintayehu a écrit :
> > Thank you! I will try to patch and use it.
> >
> > Best regards,
> >
> > - Zelalem S.
> >
> >
> >
> > > Date: Wed, 13 May 2009 13:00:50 +0200
> > > From: borja.sixto at i6net.com
> > > To: asterisk-video at lists.digium.com
> > > Subject: Re: [Asterisk-video] How to know if video call is comming?
> > >
> > > Hi Zelalem,
> > >
> > > If you are using SIP Video calls use :
> > >
> > > exten => vxml,n,NoOp(${CHANNEL(videonativeformat)})
> > >
> > > This return the Video Codec used for the call.
> > >
> > > Regards,
> > >
> > >
> > > Borja
> > >
> > >
> > > Zelalem Sintayehu a écrit :
> > > > Thank you Borja for your prompt response. But I think I have still
> > > > some questions. I am using Asterisk 1.4.21 version. So, what is the
> > > > patch (where can I get it) for this particular version. BTW, I am 
> > also
> > > > using the app_mp4 application. The other thing, does the CHANNEL
> > > > function (that you mentioned) tell me if the call if video or 
> > audio? I
> > > > mean I was expecting a return value that I can use for the GOTOIF
> > > > function in extensions.conf file to go to a particular place if the
> > > > call is video or audio. Please elaborate on this. Particularly, I
> > > > don't understand the Traces from PRI section. I don't use ISDN at the
> > > > moment.
> > > >
> > > > Thank you.
> > > >
> > > > - Zelalem S.
> > > >
> > > >
> > > > > Date: Wed, 13 May 2009 12:10:38 +0200
> > > > > From: borja.sixto at i6net.com
> > > > > To: asterisk-video at lists.digium.com
> > > > > Subject: Re: [Asterisk-video] How to if video call is comming?
> > > > >
> > > > > Hi Zelalem,
> > > > >
> > > > > Yes that is possible.
> > > > > You have a signaling information in the SETUP packet (in case of 
> > ISDN,
> > > > > you have a similar data in SS7) :
> > > > >
> > > > > Traces from PRI :
> > > > > < Bearer Capability (len= 5) [ Ext: 1 Q.931 Std: 0 Info transfer
> > > > > capability: Unrestricted digital information (8)
> > > > > < Ext: 1 Trans mode/rate: 64kbps,
> > > > > circuit-mode (16)
> > > > > < User information layer 1: H.223/H.245
> > > > > Multimedia (38)
> > > > >
> > > > > You will probably need to patch your Asterisk to be able to 
> > differe the
> > > > > 2 calls (audio and video).
> > > > > Normally, after patching the Asterisk you will have an Asterisk
> > > > Function
> > > > > called CHANNEL(transfercapability) to get and set the corresponding
> > > > > Signaling information.
> > > > >
> > > > > exten => vxml,n,NoOp(${CHANNEL(transfercapability)})
> > > > >
> > > > > Regards,
> > > > >
> > > > >
> > > > > Borja from i6net
> > > > >
> > > > >
> > > > >
> > > > > Zelalem Sintayehu a écrit :
> > > > > > Hi all, I wanted to know if there is a mechanism to know if a 
> > call is
> > > > > > video call before answering it. I want to perform something if 
> > a call
> > > > > > is video, and do another thing if it is audio.
> > > > > >
> > > > > > Thank you.
> > > > > >
> > > > > > - Zelalem S.
> > > > > >
> > > > > >
> > > > > >
> > > > 
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