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

Wed Oct 7 02:38:09 MSD 2015

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?
>>>>>>> >
>>>>>>> >
>>>>>>> _________________________________________________________________________
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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+
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>>>>>>
>>>>>>
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>>>>>>
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>>>>>
>>>>>
>>>>>
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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+
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>
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>
> https://www.youtube.com/watch?v=9XXgW34t40s
> https://www.youtube.com/watch?v=NLaDpGQuZDA
>
> _________________________________________________________________________
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>
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