[Freeswitch-users] Media delay when calling FS from a WebRTC client

Fri Mar 14 07:29:54 MSK 2014

It just sleeps whenever the channel answers so not much different.
On Mar 13, 2014 7:07 PM, "Oleg Stolyar" <olegstolyar at gmail.com> wrote:

> Thanks Anthony!!!
>
> I am using the "sleep" command in my dialplan after "answer".  Is "answer_delay"
> preferrable?
>
>
> On Thu, Mar 13, 2014 at 4:54 PM, Anthony Minessale <
> anthony.minessale at gmail.com> wrote:
>
>> Its a combo of how many nic you have that are up with IP on them and the
>> dtls handshake time which is 500ms to 1500 ms depending on the speed of the
>> exchange which cannot be shortened.  You cannot send media at all until you
>> have dtls up, this is a known limitation of dtls and they chose to do it
>> that way.
>>
>> WebRTC is not spending a lot of time pondering legacy telephony and
>> post-dial-delay etc.   Its centric on a peer-2-peer model and not even
>> giving proper attention to use cases like FS where many clients are talking
>> to one meta server with many WebRTC connections.  Maybe when the
>> drunken-buzz of trying to change the paradigm wears off, they will have
>> some bloody marys and realize you can still change it while keeping the
>> things that matter in tact that the entire human race has grown to expect
>> (like communication channels establishing in a quick timeframe).
>>
>> Until then you can set up a catch-all extension at the top of your
>> dialplan with:
>> <action application="set" data="answer_delay=2500"/>
>>
>> or add it as a global to vars.xml
>>
>> This adds a 2500 ms sleep after answer to consume the time of the dtls
>> negotiation.
>>
>>
>>
>>
>> On Thu, Mar 13, 2014 at 6:29 PM, Oleg Stolyar <olegstolyar at gmail.com>wrote:
>>
>>> Thanks Markus, I might do that but first I want to get both JsSip and
>>> smpl5 working in my environment and confirm that simpl5 is faster for me.
>>>
>>>
>>> On Thu, Mar 13, 2014 at 1:17 PM, mbo <mbodbg at gmx.net> wrote:
>>>
>>>> I’ve posted an issue regarding that to the jsip user group some time
>>>> ago, but did not follow up yet.
>>>>
>>>> https://groups.google.com/forum/#!topic/jssip/RSAycYMD9Q0
>>>>
>>>> Maybe it makes sense to continue the discussion here as this problem is
>>>> not related to freeswitch, maybe some Jssip developers can help if you post
>>>> also details about your issue there.
>>>>
>>>> Thanks
>>>>
>>>> Markus
>>>>
>>>>
>>>> Am 13.03.2014 um 19:31 schrieb Oleg Stolyar <olegstolyar at gmail.com>:
>>>>
>>>> Thanks Michael!
>>>>
>>>>
>>>>
>>>>
>>>> On Thu, Mar 13, 2014 at 11:19 AM, Michael Jerris <mike at jerris.com>wrote:
>>>>
>>>>> jssip didnt, at least at the time we made that site, support firefox,
>>>>> not sure if that has changed.  sipml5 gets the candidates sent out much
>>>>> quicker than jssip does, but jssip is much simpler and nicer to use in
>>>>> other ways.
>>>>>
>>>>> On Mar 13, 2014, at 1:56 PM, Oleg Stolyar <olegstolyar at gmail.com>
>>>>> wrote:
>>>>>
>>>>> https://webrtc.freeswitch.org on chrome redirects to a JsJip demo.
>>>>>
>>>>> Same URL on Firefox redirects to smpl5 demo,
>>>>>
>>>>> so I was wondering if there is a reason for that and if the
>>>>> comparisons between JsSip and smpl5 were done on the same browser.
>>>>>
>>>>>
>>>>> On Thu, Mar 13, 2014 at 10:45 AM, Michael Jerris <mike at jerris.com>wrote:
>>>>>
>>>>>> huh?
>>>>>>
>>>>>> On Mar 13, 2014, at 12:50 PM, Oleg Stolyar <olegstolyar at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>> On the same browser?
>>>>>>
>>>>>>
>>>>>> On Thu, Mar 13, 2014 at 9:43 AM, Michael Jerris <mike at jerris.com>wrote:
>>>>>>
>>>>>>> sipml5 seems to handle this part much much better than jssip.
>>>>>>>
>>>>>>> On Mar 13, 2014, at 12:34 PM, Oleg Stolyar <olegstolyar at gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>> So, this is WebRTC browser behavior, right?  Not something specific
>>>>>>> to JsSip?
>>>>>>>
>>>>>>>
>>>>>>> On Thu, Mar 13, 2014 at 9:20 AM, mbo <mbodbg at gmx.net> wrote:
>>>>>>>
>>>>>>>> I also have seen that it sometimes takes up to 10 seconds before
>>>>>>>> the websocket message is sent, depending on the router I’m behind, but I’ve
>>>>>>>> no solution for it yet.
>>>>>>>>
>>>>>>>>
>>>>>>>> Am 13.03.2014 um 16:58 schrieb Oleg Stolyar <olegstolyar at gmail.com
>>>>>>>> >:
>>>>>>>>
>>>>>>>> Thanks guys!  Another related question.  It's not FreeSWITCH but
>>>>>>>> perhaps someone here knows.
>>>>>>>>
>>>>>>>> There is a delay in JsSip demo when gathering candidates.  The
>>>>>>>> delay occurs after the last candidate is received and before sending the
>>>>>>>> websocket message.  From looking around the web I found that it may be due
>>>>>>>> to the WebRTC trying to get more candidates and only sending the message
>>>>>>>> when that effort times out.
>>>>>>>>
>>>>>>>> Does anyone know if there is a way around it?
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Thu, Mar 13, 2014 at 6:27 AM, Brian West <brian at freeswitch.org>wrote:
>>>>>>>>
>>>>>>>>> I don’t think you can speed this up, if you try DTLS from FS to FS
>>>>>>>>> its instant, no delays but no matter what browser you selected there is
>>>>>>>>> some delay.
>>>>>>>>> --
>>>>>>>>> Brian West
>>>>>>>>> brian at freeswitch.org
>>>>>>>>> FreeSWITCH Solutions, LLC
>>>>>>>>> PO BOX 2531
>>>>>>>>> Brookfield, WI 53008-2531
>>>>>>>>> Twitter: @FreeSWITCH , @briankwest
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>>>>>>>>> http://www.freeswitchcookbook.com
>>>>>>>>>
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>>>>>>>>> PGP Key: http://www.bkw.org/key.txt (AB93356707C76CED)
>>>>>>>>>
>>>>>>>>> On Mar 13, 2014, at 4:29 AM, mbo <mbodbg at gmx.net> wrote:
>>>>>>>>>
>>>>>>>>> > we also face that problem. Is there any solution to speed up
>>>>>>>>> DTLS handshake so far?
>>>>>>>>> >
>>>>>>>>> > Thanks
>>>>>>>>> >
>>>>>>>>> > Markus
>>>>>>>>> >
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
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>>>>>
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>>>>
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>>>
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>>
>>
>> --
>> Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬
>>
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>
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