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

Wed Oct 7 03:01:45 MSD 2015

That is correct its always represented as 8k in the sdp

Sent from my iPhone

> On Oct 6, 2015, at 5:38 PM, 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?
>>>>>>>> >
>>>>>>>> > _________________________________________________________________________
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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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>>>>>> 
>>>>>> _________________________________________________________________________
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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+
>> 
>> ClueCon Weekly Development Call 
>> ☎ sip:888 at conference.freeswitch.org  ☎ +19193869900 
>> 
>> https://www.youtube.com/watch?v=9XXgW34t40s
>> https://www.youtube.com/watch?v=NLaDpGQuZDA
>> 
>> _________________________________________________________________________
>> 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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> 
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