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

[Giovanni Maruzzelli]

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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>
>
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