[Asterisk-Users] Re: Meetme option 'b'

[John Daragon]

Tony Mountifield wrote:
> In article <43907889.60004 at argv.co.uk>, John Daragon <john at argv.co.uk> wrote:
> 
>>Hi;
>>
>>I've been looking for an arbitrary way of discovering when the last
>>user has left a Meetme conference...
>>
>>It occurred to me that I could launch an agi script to keep watch over
>>the conference and do something when the user count reaches zero... And
>>of course, I can do that directly from the dialplan.
>>
>>But I was looking at app_meetme, and the docs say:
>>
>>
>>     *  'b' — run AGI script specified in ${MEETME_AGI_BACKGROUND}
>>
>>
>>           o Default: conf-background.agi (Note: This does not work
>>             with non-Zap channels in the same conference)
>>
>>
>>I can't see anything in the code to explain this; does anyone understand 
>>why it might be ?
> 
> 
> To explain which part? That it doesn't work with non-Zap channels?
> 
> For Zap channels, the mixing is automatically done at the driver level
> once MeetMe has told the driver which channels to mix.
> 
> For a non-Zap channel, a proxy Zap channel (pseudo) is created to
> participate in the driver-level mix. The meetme thread on the channel
> then enters a loop to copy audio back and forth between the non-Zap
> channel and the proxy pseudo-channel.
> 
> When an AGI background script is specified, it runs INSTEAD OF the
> copying loop mentioned above. Therefore there is nothing to move the
> audio to and from the non-Zap channel.
> 
> Hope this helps!


It does, indeed !  Thanks for the succinct explanation.

I owe you a beer.

jd

-- 

John Daragon                                          john at argv.co.uk
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