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

Wed Oct 7 03:01:24 MSD 2015

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
> <javascript:_e(%7B%7D,'cvml','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
>> <javascript:_e(%7B%7D,'cvml','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
>>> <javascript:_e(%7B%7D,'cvml','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
>>>> <javascript:_e(%7B%7D,'cvml','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
>>>>> <javascript:_e(%7B%7D,'cvml','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
>>>>>> <javascript:_e(%7B%7D,'cvml','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
>>>>>>> <javascript:_e(%7B%7D,'cvml','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
>>>>>>>> <javascript:_e(%7B%7D,'cvml','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?
>>>>>>>> >
>>>>>>>> >
>>>>>>>> _________________________________________________________________________
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>>>>>>>> >
>>>>>>>> > Official FreeSWITCH Sites
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>>>>>>>> >
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>>>>>>>>
>>>>>>>> _________________________________________________________________________
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>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬
>>>>>>>
>>>>>>> ☞ http://freeswitch.org/  ☞ http://cluecon.com/  ☞
>>>>>>> http://twitter.com/FreeSWITCH
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>>>>>>>
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>>>>>>
>>>>>>
>>>>>>
>>>>>> _________________________________________________________________________
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>>>>>> consulting at freeswitch.org
>>>>>> <javascript:_e(%7B%7D,'cvml','consulting at freeswitch.org');>
>>>>>> http://www.freeswitchsolutions.com
>>>>>>
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>>>>>>
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>>>>>
>>>>>
>>>>>
>>>>> _________________________________________________________________________
>>>>> Professional FreeSWITCH Consulting Services:
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>>>>>
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>>>>
>>>>
>>>>
>>>> _________________________________________________________________________
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>>>
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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+>*
>>
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>> +19193869900
>>
>> ClueCon Testimonials <https://www.youtube.com/watch?v=9XXgW34t40s>
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>>
>> _________________________________________________________________________
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>> <javascript:_e(%7B%7D,'cvml','consulting at freeswitch.org');>
>> http://www.freeswitchsolutions.com
>>
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>>
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>
>
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