Probably downsampling is cheaper than upsampling. Also each outgoing stream is encoded and compressed separately, so depends on how many channels of each type you have. On Oct 7, 2015 8:10 PM, "Oleg Stolyar" <olegstolyar@gmail.com> wrote:
Interestingly, when I switched my conferences from 8000 to 16000 sample rate and left the codecs at G722 for internal users and G711 for external, the CPU usage went down by as much as 15%.
Is there an explanation for this?
On Wed, Oct 7, 2015 at 7:53 AM, Oleg Stolyar <olegstolyar@gmail.com> wrote:
Thanks guys!
On Wed, Oct 7, 2015 at 5:58 AM, Steven Ayre <steveayre@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@jerris.com> wrote:
G722/8000 is actually 16k not 8, an accident of history...
On Tuesday, October 6, 2015, Oleg Stolyar <olegstolyar@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@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@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@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@gmail.com> wrote: >> >>> If your endpoint supports it, G722@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-sca... >>> >>> >>> >>> On Tue, Oct 6, 2015 at 10:40 PM, Oleg Stolyar < >>> olegstolyar@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@gmail.com> wrote: >>>> >>>>> typo: opus@8000h@20i >>>>> >>>>> On Tue, Oct 6, 2015 at 3:33 PM, Stanislav Sinyagin < >>>>> ssinyagin@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@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@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 >>>>>> > FreeSWITCH-users@lists.freeswitch.org >>>>>> > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users >>>>>> > UNSUBSCRIBE: >>>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users >>>>>> > http://www.freeswitch.org >>>>>> >>>>>> >>>>>> _________________________________________________________________________ >>>>>> Professional FreeSWITCH Consulting Services: >>>>>> consulting@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 >>>>>> FreeSWITCH-users@lists.freeswitch.org >>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users >>>>>> UNSUBSCRIBE: >>>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users >>>>>> http://www.freeswitch.org >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> 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 >>>>> ☎ sip:888@conference.freeswitch.org ☎ +19193869900 >>>>> >>>>> ClueCon Testimonials >>>>> <https://www.youtube.com/watch?v=9XXgW34t40s> >>>>> ClueCon This Summer >>>>> <https://www.youtube.com/watch?v=NLaDpGQuZDA> >>>>> >>>>> >>>>> _________________________________________________________________________ >>>>> Professional FreeSWITCH Consulting Services: >>>>> consulting@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 >>>>> FreeSWITCH-users@lists.freeswitch.org >>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users >>>>> UNSUBSCRIBE: >>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users >>>>> http://www.freeswitch.org >>>>> >>>> >>>> >>>> >>>> _________________________________________________________________________ >>>> Professional FreeSWITCH Consulting Services: >>>> consulting@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 >>>> FreeSWITCH-users@lists.freeswitch.org >>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users >>>> UNSUBSCRIBE: >>>> http://lists.freeswitch.org/mailman/options/freeswitch-users >>>> http://www.freeswitch.org >>>> >>> >>> >>> >>> _________________________________________________________________________ >>> Professional FreeSWITCH Consulting Services: >>> consulting@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 >>> FreeSWITCH-users@lists.freeswitch.org >>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users >>> UNSUBSCRIBE: >>> http://lists.freeswitch.org/mailman/options/freeswitch-users >>> http://www.freeswitch.org >>> >> >> >> >> _________________________________________________________________________ >> Professional FreeSWITCH Consulting Services: >> consulting@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 >> FreeSWITCH-users@lists.freeswitch.org >> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users >> UNSUBSCRIBE: >> http://lists.freeswitch.org/mailman/options/freeswitch-users >> http://www.freeswitch.org >> > > > _________________________________________________________________________ > Professional FreeSWITCH Consulting Services: > consulting@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 > FreeSWITCH-users@lists.freeswitch.org > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users > UNSUBSCRIBE: > http://lists.freeswitch.org/mailman/options/freeswitch-users > http://www.freeswitch.org >
-- Anthony Minessale II ♬ @anthmfs ♬ @FreeSWITCH ♬
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_________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@freeswitch.org http://www.freeswitchsolutions.com
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_________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@freeswitch.org http://www.freeswitchsolutions.com
Official FreeSWITCH Sites http://www.freeswitch.org http://confluence.freeswitch.org http://www.cluecon.com
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_________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@freeswitch.org http://www.freeswitchsolutions.com
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