[Freeswitch-users] Question about large confeerence

Fri Apr 20 17:29:20 UTC 2018

I do understand that the way mod_conference work it is not efficient for my
use case, my question is about the best alternative.
Streaming would be ideal if it wouldn't be for the latency, since users
need to be able to switch to talk mode there is no way a latency of 5-10
seconds (or possibly more) is acceptable.
Another option is to use eavesdrop which I plan on testing next week to see
if it scales, if someone has any input on it I would appreciate.
The next option would be to optimize mod_conference for this use case, I
started looking at the code and identified some places that performance can
be optimized but may need to hire someone with better C skills to do the
actual coding.
another possibility may be, to use an RTP proxy that would just distribute
the RTP to all callers, this would give the best performance but would
limit features.
Last option would be to develop a new module optimized for low latency
streaming, but leave that as a last resort.

On Fri, Apr 20, 2018 at 1:15 PM, Tihomir Culjaga <tculjaga at gmail.com> wrote:

> a conference with 1000 members demands huge resources... and this is not
> efficient if only 2-5% of members will actually talk.
> you need to keep the actual conference to the minimum number of "speakers"
> and move listeners to a streaming "service".
>
> so, focus on how to get your entire conference streamed somewhere.
>
> another thing to consider.... do the "listeners" really need to be in time
> sync with the conference ? They will just hear the conversation from the
> conference a bit later... thats all.
>
> T.
>
>
>
>
>
>
> On 20 April 2018 at 14:43, Abaci B <abaci64 at gmail.com> wrote:
>
>> problem with shoutcast streaming is the extreme latency
>>
>> On Fri, Apr 20, 2018 at 1:30 AM, Giovanni Maruzzelli <gmaruzz at gmail.com>
>> wrote:
>>
>>> you definitely want to have only the speakers into conference, and
>>> stream to all others.
>>>
>>> -giovanni
>>>
>>> On 19 April 2018 at 23:37, Abaci B <abaci64 at gmail.com> wrote:
>>>
>>>> I was thinking that the muted flag (CAN_SPEAK?) is something that can
>>>> change mid conference which means there is a chance of loosing a single
>>>> frame (the last one right before muting). I was more interested in knowing
>>>> as far as performance if it makes sense.
>>>> not sure if this is safe but something like only starting
>>>> conference_loop_launch_input if that flag is not set.
>>>> I still wish there would be module that would do exactly this
>>>> (something like shoutcast but local and without the shoutcast latency)
>>>>
>>>> On Thu, Apr 19, 2018 at 5:19 PM, Steven Ayre <steveayre at gmail.com>
>>>> wrote:
>>>>
>>>>> There's already a muted flag you could use for that.
>>>>>
>>>>> On 19 April 2018 at 20:55, Abaci B <abaci64 at gmail.com> wrote:
>>>>>
>>>>>> Thanks for the reply.
>>>>>> Another idea I'm thinking of is to add a LISTEN_ONLY mflag to
>>>>>> mod_conference and only run conference_loop_input thread on channels that
>>>>>> don't have this flag, that way I don't need to set up a shoutcast server
>>>>>> and have everything contained within freeswitch, does that make sense?
>>>>>>
>>>>>> On Thu, Apr 19, 2018 at 3:20 PM, Giovanni Maruzzelli <
>>>>>> gmaruzz at gmail.com> wrote:
>>>>>>
>>>>>>> definitely conference with two participant, and 598 on localstream
>>>>>>>
>>>>>>> -giovanni
>>>>>>>
>>>>>>> On Thu, Apr 19, 2018, 18:38 Abaci B <abaci64 at gmail.com> wrote:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>> I'm trying to set up a large audio conference of over 1000 users
>>>>>>>> where only 1 or 2 users are talking and the rest are just listening, but
>>>>>>>> after 600-700 users the CPU usage gets too high and the audio gets choppy,
>>>>>>>> I understand that mod_conference is not optimized for my use case but was
>>>>>>>> wondering if someone has any suggestions on what can be done to optimize
>>>>>>>> for my use case.
>>>>>>>> I was also thinking that maybe there is a  better alternative for
>>>>>>>> what I look for, such as having just the talkers on the conference and the
>>>>>>>> listeners should listen to it via mod_local_stream or maybe use something
>>>>>>>> like eavesdrop for the listeners but not sure if and how much performance I
>>>>>>>> would gain.
>>>>>>>> Thanks for any help or input
>>>>>>>>
>>>>>>>> ____________________________________________________________
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>>>>>>>>
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>>>>>>>
>>>>>>>
>>>>>>> ____________________________________________________________
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>>>>>>>
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>>>>>>
>>>>>>
>>>>>> ____________________________________________________________
>>>>>> _____________
>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>> consulting at freeswitch.org
>>>>>> http://www.freeswitchsolutions.com
>>>>>>
>>>>>> Official FreeSWITCH Sites
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>>>>>> http://www.cluecon.com
>>>>>>
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>>>>>
>>>>>
>>>>> ____________________________________________________________
>>>>> _____________
>>>>> Professional FreeSWITCH Consulting Services:
>>>>> consulting at freeswitch.org
>>>>> http://www.freeswitchsolutions.com
>>>>>
>>>>> Official FreeSWITCH Sites
>>>>> http://www.freeswitch.org
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>>>>> http://www.cluecon.com
>>>>>
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>>>>
>>>>
>>>> ____________________________________________________________
>>>> _____________
>>>> Professional FreeSWITCH Consulting Services:
>>>> consulting at freeswitch.org
>>>> http://www.freeswitchsolutions.com
>>>>
>>>> Official FreeSWITCH Sites
>>>> http://www.freeswitch.org
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>>>
>>>
>>>
>>> --
>>>
>>> Sincerely,
>>>
>>> Giovanni Maruzzelli
>>> OpenTelecom.IT
>>> cell: +39 347 266 56 18
>>>
>>> ____________________________________________________________
>>> _____________
>>> Professional FreeSWITCH Consulting Services:
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>>>
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>>
>>
>> _________________________________________________________________________
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>>
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>
>
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