[Freeswitch-users] use-vbr vs adjust-bitrate in opus.conf.xml

[E. Schmidbauer]

Thanks for the clarification!
I'm curious about the implementation of `adjust-bitrate`
How does freeswitch actually adjust the bitrate of a live call? Does
freeswitch send a RE-INVITE w/ SDP changes or some other way that I cannot
think of?
Thanks,
Emmanuel


On Mon, Nov 2, 2020 at 1:49 PM Dragos Oancea <dragos at freeswitch.org> wrote:

> "use-vbr" will configure the encoder in VBR mode - which is the opposite
> of CBR . This happens once during the call, when the encoder is initiated,
> and the payload for each packet will have different sizes based on the
> audio input.  "adjust-bitrate" enables a feature in FS that will pass
> certain information to the opus module during the call and the bitrate of
> the encoder will be modified based on packet loss / RTT .
>
> Dragos
>
> On Mon, Nov 2, 2020 at 3:18 PM E. Schmidbauer <eschmidbauer at gmail.com>
> wrote:
>
>> in opus.conf.xml what is the difference between adjust-bitrate and
>> use-vbr ?
>> doesn’t variable bit rate (vbr) adjust the bitrate? or do you need both
>> enabled for that to actually work?
>> or do they contradict each other?
>> Any info on this would be greatly appreciated and i would love to
>> document the answer on confluence
>> https://freeswitch.org/confluence/display/FREESWITCH/mod_opus
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>
> _________________________________________________________________________
>
> The FreeSWITCH project is sponsored by SignalWire https://signalwire.com
> Enhance your FreeSWITCH install with disruptive priced SMS and PSTN
> services.
> Build your next product on our scalable cloud platform.
>
> Join our online community to chat in real time
> https://signalwire.community
>
> Professional FreeSWITCH Services
> sales at freeswitch.com
> https://freeswitch.com
>
> Official FreeSWITCH Sites
> https://freeswitch.com/oss
> https://freeswitch.org/confluence
> https://cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
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