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

Wed Oct 7 18:53:02 MSD 2015

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
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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
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>>>>>>>>>
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>>>>>>>>> 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
>>>>>>>> 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
>>>>>
>>>>> Official FreeSWITCH Sites
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>>>>> http://www.cluecon.com
>>>>>
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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
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>>>>
>>>> ClueCon Testimonials <https://www.youtube.com/watch?v=9XXgW34t40s>
>>>> ClueCon This Summer <https://www.youtube.com/watch?v=NLaDpGQuZDA>
>>>>
>>>>
>>>> _________________________________________________________________________
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>>>>
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>>>
>>>
>> _________________________________________________________________________
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>>
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>
>
> _________________________________________________________________________
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> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
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>
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