[Freeswitch-users] Conference vs codec sample rate and CPU

Thu Oct 8 00:37:25 MSD 2015

I thought for some reason (probably something I read) eavesdrop was limited
to only one other user and also not sure what would happen if one of the
original users wanted to drop off.

Not to mention that I also wanted the ability for one of the original users
to drop off first and only then another user to join when they are ready.
Without conference, I would have to put the other original user back into
park.  With conference, no processing at all is required on that line.
Like I said - conference is just too convenient for my use cases.

On Wed, Oct 7, 2015 at 1:19 PM, Stanislav Sinyagin <ssinyagin at gmail.com>
wrote:

> You can also use park to connect two users, and use eavesdrop when you
> need to connect the third one
> On Oct 7, 2015 9:56 PM, "Oleg Stolyar" <olegstolyar at gmail.com> wrote:
>
>> Basically I am willing to burn some extra electricity for the ability to
>> have other people easily join the call, automatically record when a second
>> person joins and other features I get from conference for free (or at least
>> at the cost of extra electricity)
>>
>> Besides, all my calls from both internal and external users are incoming,
>> so if I did not use conference, I would have to use park and I am not sure
>> that a common codec could be negotiated in this case.
>>
>>
>>
>> On Wed, Oct 7, 2015 at 12:31 PM, Michael Jerris <mike at jerris.com> wrote:
>>
>>> If you only have 2 calls, why not just bridge them instead of having all
>>> the extra overhead of a conference?  Also, if you have only 2 people, one
>>> is wideband and the other narrow, you get no benefit other than you get to
>>> create a bit more extra heat and use some more electricity.  If this was a
>>> bridged call, you could negotiate common codecs.
>>>
>>> On Oct 7, 2015, at 2:12 PM, Oleg Stolyar <olegstolyar at gmail.com> wrote:
>>>
>>> Yes, it's almost always one internal and one external user.
>>>
>>> On Wed, Oct 7, 2015 at 12:00 PM, Michael Jerris <mike at jerris.com> wrote:
>>>
>>>> I think down is a bit cheaper cpu than up, but also, do you have the
>>>> same number of internal and external users?
>>>>
>>>> On Oct 7, 2015, at 11:09 AM, Oleg Stolyar <olegstolyar at gmail.com>
>>>> wrote:
>>>>
>>>> Interestingly, when I switched my conferences from 8000 to 16000 sample
>>>> rate and left the codecs at G722 for internal users and G711 for external,
>>>> the CPU usage went down by as much as 15%.
>>>>
>>>> Is there an explanation for this?
>>>>
>>>> On Wed, Oct 7, 2015 at 7:53 AM, Oleg Stolyar <olegstolyar at gmail.com>
>>>> wrote:
>>>>
>>>>> Thanks guys!
>>>>>
>>>>> On Wed, Oct 7, 2015 at 5:58 AM, Steven Ayre <steveayre at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> http://tools.ietf.org/html/rfc3551
>>>>>>
>>>>>>    Even though the actual sampling rate for G.722 audio is 16,000 Hz,
>>>>>>    the RTP clock rate for the G722 payload format is 8,000 Hz because
>>>>>>    that value was erroneously assigned in RFC 1890 <http://tools.ietf.org/html/rfc1890> and must remain
>>>>>>    unchanged for backward compatibility.  The octet rate or sample-pair
>>>>>>    rate is 8,000 Hz.
>>>>>>
>>>>>>
>>>>>> On 7 October 2015 at 00:01, Michael Jerris <mike at jerris.com> wrote:
>>>>>>
>>>>>>> G722/8000 is actually 16k not 8, an accident of history...
>>>>>>>
>>>>>>>
>>>>>>> On Tuesday, October 6, 2015, Oleg Stolyar <olegstolyar at gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Yeah but Chrome seems to only be offering G722 at 8000
>>>>>>>> a=rtpmap:9 G722/8000
>>>>>>>>
>>>>>>>> Am I reading this correctly?
>>>>>>>>
>>>>>>>> On Tue, Oct 6, 2015 at 3:32 PM, Anthony Minessale <
>>>>>>>> anthony.minessale at gmail.com> wrote:
>>>>>>>>
>>>>>>>>> G722 is actually 16khz which can pass for hd
>>>>>>>>> isac will do higher sample rates as well like 16 and 32 but it
>>>>>>>>> will probably also be cpu intensive.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Tue, Oct 6, 2015 at 5:17 PM, Giovanni Maruzzelli <
>>>>>>>>> gmaruzz at gmail.com> wrote:
>>>>>>>>>
>>>>>>>>>> With browsers/webrtc I believe your choice is only between opus
>>>>>>>>>> and g711
>>>>>>>>>>
>>>>>>>>>> sent from my mobile,
>>>>>>>>>> Giovanni Maruzzelli
>>>>>>>>>> cell: +39 347 266 56 18
>>>>>>>>>> On Oct 7, 2015 12:04 AM, "Oleg Stolyar" <olegstolyar at gmail.com>
>>>>>>>>>> wrote:
>>>>>>>>>>
>>>>>>>>>>> My endpoint is Chrome/WebRTC.  Here is what the current version
>>>>>>>>>>> sends in the the INVITE.
>>>>>>>>>>>
>>>>>>>>>>> Doesn't look like G722/16000 is there.  How is ISAC in terms of
>>>>>>>>>>> CPU consumption?
>>>>>>>>>>>
>>>>>>>>>>> a=rtpmap:111 opus/48000/2
>>>>>>>>>>> a=fmtp:111 minptime=10; useinbandfec=1
>>>>>>>>>>> a=rtpmap:103 ISAC/16000
>>>>>>>>>>> a=rtpmap:104 ISAC/32000
>>>>>>>>>>> a=rtpmap:9 G722/8000
>>>>>>>>>>> a=rtpmap:0 PCMU/8000
>>>>>>>>>>> a=rtpmap:8 PCMA/8000
>>>>>>>>>>> a=rtpmap:106 CN/32000
>>>>>>>>>>> a=rtpmap:105 CN/16000
>>>>>>>>>>> a=rtpmap:13 CN/8000
>>>>>>>>>>> a=rtpmap:126 telephone-event/8000
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Tue, Oct 6, 2015 at 1:49 PM, Stanislav Sinyagin <
>>>>>>>>>>> ssinyagin at gmail.com> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> If your endpoint supports it, G722 at 16000h gives a very decent
>>>>>>>>>>>> voice quality. SILK also supports 16KHz.
>>>>>>>>>>>>
>>>>>>>>>>>> here's some information related to codec complexity:
>>>>>>>>>>>>
>>>>>>>>>>>> https://txlab.wordpress.com/2015/04/10/testing-freeswitch-performance-on-scaleway-c1/
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> On Tue, Oct 6, 2015 at 10:40 PM, Oleg Stolyar <
>>>>>>>>>>>> olegstolyar at gmail.com> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks guys!
>>>>>>>>>>>>>
>>>>>>>>>>>>> Anthony, using your suggestion means that I won't have HD
>>>>>>>>>>>>> voice, correct?  HD voice is the primary reason I am considering OPUS
>>>>>>>>>>>>> instead of G.722.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Is there some codec/setting that will let me have HD voice for
>>>>>>>>>>>>> less CPU and perhaps more bandwidth?
>>>>>>>>>>>>>
>>>>>>>>>>>>> It's not a must - I can scale up if needed, just wondering.
>>>>>>>>>>>>>
>>>>>>>>>>>>> On Tue, Oct 6, 2015 at 1:35 PM, Anthony Minessale <
>>>>>>>>>>>>> anthony.minessale at gmail.com> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> typo: opus at 8000h@20i
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> On Tue, Oct 6, 2015 at 3:33 PM, Stanislav Sinyagin <
>>>>>>>>>>>>>> ssinyagin at gmail.com> wrote:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> OPUS is an expensive codec, so any conversion between OPUS
>>>>>>>>>>>>>>> and
>>>>>>>>>>>>>>> uncompressed audio is CPU-consuming. I don;t think that
>>>>>>>>>>>>>>> resampling
>>>>>>>>>>>>>>> would play much of a role in CPU consumption.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On Tue, Oct 6, 2015 at 10:29 PM, Oleg Stolyar <
>>>>>>>>>>>>>>> olegstolyar at gmail.com> wrote:
>>>>>>>>>>>>>>> > Hi guys,
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> > I have a bunch of conferences on my FS.  Users are either
>>>>>>>>>>>>>>> G.711/8000 or
>>>>>>>>>>>>>>> > G.722/8000.  Conference sample rate is set to 8000.
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> > When I switched some users to OPUS instead, the CPU
>>>>>>>>>>>>>>> consumption jumped 3-4
>>>>>>>>>>>>>>> > times even though the conference rate is still 8000.  Is
>>>>>>>>>>>>>>> this expected?
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> > I was hoping to be able to save some CPU by setting the
>>>>>>>>>>>>>>> conference sample
>>>>>>>>>>>>>>> > rate to auto (so it only used high-quality sampling for
>>>>>>>>>>>>>>> users that can
>>>>>>>>>>>>>>> > support it)  but it seems it won't work.  Any ideas?
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> _________________________________________________________________________
>>>>>>>>>>>>>>> > Professional FreeSWITCH Consulting Services:
>>>>>>>>>>>>>>> > consulting at freeswitch.org
>>>>>>>>>>>>>>> > http://www.freeswitchsolutions.com
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> > Official FreeSWITCH Sites
>>>>>>>>>>>>>>> > http://www.freeswitch.org
>>>>>>>>>>>>>>> > http://confluence.freeswitch.org
>>>>>>>>>>>>>>> > http://www.cluecon.com
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> > FreeSWITCH-users mailing list
>>>>>>>>>>>>>>> > FreeSWITCH-users at lists.freeswitch.org
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>>>>>>>>> > UNSUBSCRIBE:
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>>>>>>>>>>>>>>> > http://www.freeswitch.org
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> _________________________________________________________________________
>>>>>>>>>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>>>>>>>>> consulting at freeswitch.org
>>>>>>>>>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Official FreeSWITCH Sites
>>>>>>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>>>>>> http://confluence.freeswitch.org
>>>>>>>>>>>>>>> http://www.cluecon.com
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> FreeSWITCH-users mailing list
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>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> --
>>>>>>>>>>>>>> Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> ☞ http://freeswitch.org/  ☞ http://cluecon.com/  ☞
>>>>>>>>>>>>>> http://twitter.com/FreeSWITCH
>>>>>>>>>>>>>> ☞ irc.freenode.net #freeswitch ☞ *http://freeswitch.org/g+
>>>>>>>>>>>>>> <http://freeswitch.org/g+>*
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> ClueCon Weekly Development Call
>>>>>>>>>>>>>> ☎ sip:888 at conference.freeswitch.org  ☎ +19193869900
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> ClueCon Testimonials
>>>>>>>>>>>>>> <https://www.youtube.com/watch?v=9XXgW34t40s>
>>>>>>>>>>>>>> ClueCon This Summer
>>>>>>>>>>>>>> <https://www.youtube.com/watch?v=NLaDpGQuZDA>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> _________________________________________________________________________
>>>>>>>>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>>>>>>>> consulting at freeswitch.org
>>>>>>>>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Official FreeSWITCH Sites
>>>>>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>>>>> http://confluence.freeswitch.org
>>>>>>>>>>>>>> http://www.cluecon.com
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> FreeSWITCH-users mailing list
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>>>>>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> _________________________________________________________________________
>>>>>>>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>>>>>>> consulting at freeswitch.org
>>>>>>>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>>>>>>>
>>>>>>>>>>>>> Official FreeSWITCH Sites
>>>>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>>>> http://confluence.freeswitch.org
>>>>>>>>>>>>> http://www.cluecon.com
>>>>>>>>>>>>>
>>>>>>>>>>>>> FreeSWITCH-users mailing list
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>>>>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> _________________________________________________________________________
>>>>>>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>>>>>> consulting at freeswitch.org
>>>>>>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>>>>>>
>>>>>>>>>>>> Official FreeSWITCH Sites
>>>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>>> http://confluence.freeswitch.org
>>>>>>>>>>>> http://www.cluecon.com
>>>>>>>>>>>>
>>>>>>>>>>>> FreeSWITCH-users mailing list
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>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> _________________________________________________________________________
>>>>>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>>>>> consulting at freeswitch.org
>>>>>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>>>>>
>>>>>>>>>>> Official FreeSWITCH Sites
>>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>> http://confluence.freeswitch.org
>>>>>>>>>>> http://www.cluecon.com
>>>>>>>>>>>
>>>>>>>>>>> FreeSWITCH-users mailing list
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>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> _________________________________________________________________________
>>>>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>>>> consulting at freeswitch.org
>>>>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>>>>
>>>>>>>>>> Official FreeSWITCH Sites
>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>> http://confluence.freeswitch.org
>>>>>>>>>> http://www.cluecon.com
>>>>>>>>>>
>>>>>>>>>> FreeSWITCH-users mailing list
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>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬
>>>>>>>>>
>>>>>>>>> ☞ http://freeswitch.org/  ☞ http://cluecon.com/  ☞
>>>>>>>>> http://twitter.com/FreeSWITCH
>>>>>>>>> ☞ irc.freenode.net #freeswitch ☞ *http://freeswitch.org/g+
>>>>>>>>> <http://freeswitch.org/g+>*
>>>>>>>>>
>>>>>>>>> ClueCon Weekly Development Call
>>>>>>>>> ☎ sip:888 at conference.freeswitch.org  ☎ +19193869900
>>>>>>>>>
>>>>>>>>> ClueCon Testimonials <https://www.youtube.com/watch?v=9XXgW34t40s>
>>>>>>>>> ClueCon This Summer <https://www.youtube.com/watch?v=NLaDpGQuZDA>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> _________________________________________________________________________
>>>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>>> consulting at freeswitch.org
>>>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>>>
>>>>>>>>> Official FreeSWITCH Sites
>>>>>>>>> http://www.freeswitch.org
>>>>>>>>> http://confluence.freeswitch.org
>>>>>>>>> http://www.cluecon.com
>>>>>>>>>
>>>>>>>>> FreeSWITCH-users mailing list
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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
>>>>>> http://confluence.freeswitch.org
>>>>>> http://www.cluecon.com
>>>>>>
>>>>>> FreeSWITCH-users mailing list
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>>>>>>
>>>>>
>>>>>
>>>>
>>>> _________________________________________________________________________
>>>> Professional FreeSWITCH Consulting Services:
>>>> consulting at freeswitch.org
>>>> http://www.freeswitchsolutions.com
>>>>
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>>>>
>>>>
>>>>
>>>> _________________________________________________________________________
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>>>> http://www.freeswitchsolutions.com
>>>>
>>>> Official FreeSWITCH Sites
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>>>>
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>>>
>>> _________________________________________________________________________
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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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>>
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>>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
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>
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