[Freeswitch-docs] Jitterbuffer

Sat Nov 14 22:55:13 MSK 2015

OK, I just watched the Wednesday conference video during which Brian demonstrated the jitter buffer. I caught it live, but got in late.

Does the new jb only apply to Opus with FEC turned on? Or all codecs that support FEC? Or all codecs, period?

It would help me immensely if I had a list of current commands that are applicable to the jitter buffer, as Brian says that there are incorrect ones that need to be cleaned out. I’m only fair to middling at reading source code and figuring out what’s happening.

I saw on the video he typed “1p” at the end of a jb command and a guy on the mailing list just offered a similar construct in a thread discussing the jb, which puzzled both of us.

Thanks.

Bote

From: freeswitch-docs-bounces at lists.freeswitch.org [mailto:freeswitch-docs-bounces at lists.freeswitch.org] On Behalf Of Anthony Minessale
Sent: Saturday, 14 November, 2015 10:57
To: FreeSWITCH Docs Team
Subject: Re: [Freeswitch-docs] [Freeswitch-users] Jitterbuffer

Its there under the cluecon weekly from a few weeks ago.

http://youtube.com/freeswitch

On Friday, November 13, 2015, Bote Man <bote_radio at botecomm.com> wrote:

This is a good idea, except which docs are invalid now?

I added the use-jb-lookahead under a new section about Opus and the note at the bottom of the Confluence page from ”Bipin”, but don’t know what to delete, if anything.

I looked for on YouTube for your excellent demo of the new jitter buffer performance but it’s not up there yet; I was hoping it had some of the new stuff outlined on a screen capture.

Thanks.

Bote

From: freeswitch-docs-bounces at lists.freeswitch.org <javascript:_e(%7B%7D,'cvml','freeswitch-docs-bounces at lists.freeswitch.org');>  [mailto:freeswitch-docs-bounces at lists.freeswitch.org <javascript:_e(%7B%7D,'cvml','freeswitch-docs-bounces at lists.freeswitch.org');> ] On Behalf Of Brian West
Sent: Friday, 13 November, 2015 12:45
To: FreeSWITCH Users Help; FreeSWITCH Docs Team
Subject: Re: [Freeswitch-docs] [Freeswitch-users] Jitterbuffer

We probably need to wipe confluence clean of the incorrect jitter buffer docs now that its been completely rewritten in the past few months.

On Thu, Nov 12, 2015 at 4:06 AM, Ola Bäckström <Ola.Backstrom at loxysoft.se <javascript:_e(%7B%7D,'cvml','Ola.Backstrom at loxysoft.se');> > wrote:

Dragos,

Your example to enable jitter buffering uses the letter ”p”. Is that a typo or does it indeed mean something? 

>  You can enable the Jitter Buffer in the dial plan:
>  <action application="set" data="jitterbuffer_msec=2p:25p:"/>

I see no such usage in the documentation at https://freeswitch.org/confluence/display/FREESWITCH/JitterBuffer , but just “60:200:20”. 

Best regards

/Ola

From: freeswitch-users-bounces at lists.freeswitch.org <javascript:_e(%7B%7D,'cvml','freeswitch-users-bounces at lists.freeswitch.org');>  [mailto:freeswitch-users-bounces at lists.freeswitch.org <javascript:_e(%7B%7D,'cvml','freeswitch-users-bounces at lists.freeswitch.org');> ] On Behalf Of Dragos Oancea
Sent: den 12 november 2015 10:14
To: freeswitch-users at lists.freeswitch.org <javascript:_e(%7B%7D,'cvml','freeswitch-users at lists.freeswitch.org');> 
Subject: Re: [Freeswitch-users] Jitterbuffer

Hi Josh,

Use FS master, it has a new audio Jitter Buffer.

Then you can use Opus with this setting in the codec config:
<param name="use-jb-lookahead" value="1"/> . 
The other side must be sending FEC so you could profit from it.

You can enable the Jitter Buffer in the dial plan:
<action application="set" data="jitterbuffer_msec=2p:25p:"/>
And then enable PLC :
<action application="set" data="rtp_jitter_buffer_plc=true"/>

Regards,
Dragos

On 11/12/2015 07:51 AM, Josh Richesin wrote: 

Hello,

I am running FreeSwitch for our small Wireless ISP.   Obviously, as a wireless ISP and ITSP, we have a lot of jitter and some packet loss.  Have a few questions for this setup.

1) What is the best codec to use when there is going to be jitter and some packetloss?

2) The ATA's that we are using have adaptive jitter buffers, should I enable jitterbuffer on Freeswitch as well?  If so, should it be via sofia profiles?

The problem that I am trying to solve is this...

Our voice customers on our freeswitch have a lot of issues with "calls breaking up"  When they use another voice provider, like say vonage or something running off of a metaswitch, they do not have the same issues.  

Any help with this would be appreciated!  Thanks in advance.

Josh

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