[Freeswitch-users] Mod_shout using with icecast Big delay

Jeff Leung jleung at v10networks.ca
Thu Aug 15 21:40:15 MSD 2013 

Icecast is known to have a relatively high latency for audio.


On Thu, Aug 15, 2013 at 10:34 AM, Anthony Minessale <
anthony.minessale at gmail.com> wrote:

> enable_file_write_buffering=false
> stream_prebuffer=0
>
> On the leg doing the recording.  It does't stop the iceast server or
> libshout from buffering it more.
>
>
>
>
>
> On Thu, Aug 15, 2013 at 12:07 PM, Jorge Núñez <jorgefren12 at gmail.com>wrote:
>
>> Anthony and just for test how can I reduce the latency? and thanks
>> Michael for use webrtc Do I need to use Sipml5 or JSSIP o are there any
>> othe way to use because I was trying to find some information about
>> mod_html5 but I didn´t find
>>
>> thanks
>>
>> Jorge
>>
>>
>> 2013/8/15 Michael Jerris <mike at jerris.com>
>>
>>> The alternative if you want in sync audio would be to use webrtc
>>> endpoints to listen.
>>>
>>> On Aug 14, 2013, at 7:19 PM, Anthony Minessale <
>>> anthony.minessale at gmail.com> wrote:
>>>
>>> Icecast is not designed for low-latency and realtime audio.  Its
>>> designed for higher quality reliable audio.  The servers and the client
>>> libs both use latency and buffering to guarantee this.  There are some
>>> techniques to reduce the buffering on at least the FS side but then you
>>> will start getting skips and resets if you miss any packets.
>>>
>>> This comes up all the time when people first try doing this.  Either you
>>> need to just accept the delay since most people will not even know its
>>> there or use some other method.
>>>
>>>
>>>
>>>
>>> On Wed, Aug 14, 2013 at 5:12 PM, Stephen Dame <sdame at 207me.com> wrote:
>>>
>>>> Did you restart the freeswitch server after changes to the config
>>>> files,   I’m not sure 100% if reloadxml resets the conference settings.
>>>> ****
>>>>
>>>> ** **
>>>>
>>>> Also I use some flash based players, I think there where client
>>>> settiings for buffering.   Can you set buffer in HTML tag?****
>>>>
>>>> ** **
>>>>
>>>> Regards,****
>>>>
>>>> Stephen****
>>>>
>>>> ** **
>>>>
>>>> 207 Technology Group Inc.   1-888-229-9756  skype: Stephen_Dame****
>>>>
>>>> ** **
>>>>
>>>> *From:* freeswitch-users-bounces at lists.freeswitch.org [mailto:
>>>> freeswitch-users-bounces at lists.freeswitch.org] *On Behalf Of *Jorge
>>>> Núñez
>>>> *Sent:* Wednesday, August 14, 2013 4:18 PM
>>>>
>>>> *To:* FreeSWITCH Users Help
>>>> *Subject:* Re: [Freeswitch-users] Mod_shout using with icecast Big
>>>> delay****
>>>>
>>>> ** **
>>>>
>>>> Hi thanks, I set your configuration but nothing changed, I reduced the
>>>> burst size and it takes me just 11s and also I tried with 8k, 16k and 32k
>>>> and nothing change****
>>>>
>>>> ** **
>>>>
>>>>     <limits>****
>>>>
>>>>         <clients>100</clients>****
>>>>
>>>>         <sources>10</sources>****
>>>>
>>>>         <threadpool>5</threadpool>****
>>>>
>>>>         <queue-size>524288</queue-size>****
>>>>
>>>>         <!-- <queue-size>524288</queue-size> -->****
>>>>
>>>>         <client-timeout>30</client-timeout>****
>>>>
>>>>         <header-timeout>15</header-timeout>****
>>>>
>>>>         <source-timeout>10</source-timeout>****
>>>>
>>>>         <!-- If enabled, this will provide a burst of data when a
>>>> client ****
>>>>
>>>>              first connects, thereby significantly reducing the startup
>>>> ****
>>>>
>>>>              time for listeners that do substantial buffering. However,
>>>> ****
>>>>
>>>>              it also significantly increases latency between the source
>>>> ****
>>>>
>>>>              client and listening client.  For low-latency setups, you*
>>>> ***
>>>>
>>>>              might want to disable this. -->****
>>>>
>>>>         <burst-on-connect>0</burst-on-connect>****
>>>>
>>>>         <!-- same as burst-on-connect, but this allows for being more**
>>>> **
>>>>
>>>>              specific on how much to burst. Most people won't need to**
>>>> **
>>>>
>>>>              change from the default 64k. Applies to all mountpoints **
>>>> **
>>>>
>>>> ** **
>>>>
>>>>  -->****
>>>>
>>>>         <burst-size>4096</burst-size>****
>>>>
>>>>     </limits>****
>>>>
>>>> ** **
>>>>
>>>> Regards****
>>>>
>>>> ** **
>>>>
>>>> Jorge****
>>>>
>>>> ** **
>>>>
>>>> ** **
>>>>
>>>> 2013/8/14 Stephen Dame <sdame at 207me.com>****
>>>>
>>>> Jorge, ****
>>>>
>>>>  ****
>>>>
>>>> Play around with the burst size and queue size…  here is my xml config
>>>> around 3-4 second delay from 16k freeswitch conference. ****
>>>>
>>>> To small a buffer and the players disconnect… Im also running icecast
>>>> on same server.****
>>>>
>>>>  ****
>>>>
>>>> <icecast>****
>>>>
>>>>     <limits>****
>>>>
>>>>         <clients>100</clients>****
>>>>
>>>>         <sources>10</sources>****
>>>>
>>>>         <threadpool>5</threadpool>****
>>>>
>>>>         <queue-size>524288</queue-size>****
>>>>
>>>>         <client-timeout>30</client-timeout>****
>>>>
>>>>         <header-timeout>15</header-timeout>****
>>>>
>>>>         <source-timeout>10</source-timeout>****
>>>>
>>>>         <burst-on-connect>1</burst-on-connect>****
>>>>
>>>>         <!-- same as burst-on-connect, but this allows for being more**
>>>> **
>>>>
>>>>              specific on how much to burst. Most people won't need to**
>>>> **
>>>>
>>>>              change from the default 64k. Applies to all mountpoints
>>>> -->****
>>>>
>>>>         <burst-size>65535</burst-size>****
>>>>
>>>>     </limits>****
>>>>
>>>>  ****
>>>>
>>>> Regards,****
>>>>
>>>> Stephen****
>>>>
>>>>  ****
>>>>
>>>> *From:* freeswitch-users-bounces at lists.freeswitch.org [mailto:
>>>> freeswitch-users-bounces at lists.freeswitch.org] *On Behalf Of *Ken Rice
>>>> *Sent:* Wednesday, August 14, 2013 12:35 PM
>>>> *To:* FreeSWITCH Users Help
>>>> *Subject:* Re: [Freeswitch-users] Mod_shout using with icecast Big
>>>> delay****
>>>>
>>>>  ****
>>>>
>>>> You have to keep in mind that icecast itself has a fair bit of
>>>> buffering involved with it and theres not a lot you can do about that
>>>>
>>>>
>>>> On 8/14/13 11:30 AM, "Jorge Núñez" <jorgefren12 at gmail.com> wrote:****
>>>>
>>>> Hi I am using mod_shout to send a conference call to icecast and hear
>>>> it from a tag audio in html5 in realtime, but it has a big delay like 12
>>>> seconds. How can I reduce the latency of the audio sent from freeswitch or
>>>> what can I do to improve this.
>>>>
>>>> Regards
>>>>
>>>> Jorge****
>>>> ------------------------------
>>>>
>>>>
>>>> _________________________________________________________________________
>>>> Professional FreeSWITCH Consulting Services:
>>>> consulting at freeswitch.org
>>>> http://www.freeswitchsolutions.com
>>>>
>>>> 
>>>> 
>>>>
>>>> Official FreeSWITCH Sites
>>>> http://www.freeswitch.org
>>>> http://wiki.freeswitch.org
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>>>>
>>>> FreeSWITCH-users mailing list
>>>> FreeSWITCH-users at lists.freeswitch.org
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>>>>
>>>>
>>>> --
>>>> Ken
>>>> *http://www.FreeSWITCH.org <http://www.freeswitch.org/>
>>>> http://www.ClueCon.com <http://www.cluecon.com/>
>>>> http://www.OSTAG.org <http://www.ostag.org/>
>>>> *irc.freenode.net #freeswitch****
>>>>
>>>>
>>>>
>>>> _________________________________________________________________________
>>>> Professional FreeSWITCH Consulting Services:
>>>> consulting at freeswitch.org
>>>> http://www.freeswitchsolutions.com
>>>>
>>>> 
>>>> 
>>>>
>>>> Official FreeSWITCH Sites
>>>> http://www.freeswitch.org
>>>> http://wiki.freeswitch.org
>>>> http://www.cluecon.com
>>>>
>>>> FreeSWITCH-users mailing list
>>>> FreeSWITCH-users at lists.freeswitch.org
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>>>> UNSUBSCRIBE:
>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>> http://www.freeswitch.org****
>>>>
>>>> ** **
>>>>
>>>>
>>>> _________________________________________________________________________
>>>> Professional FreeSWITCH Consulting Services:
>>>> consulting at freeswitch.org
>>>> http://www.freeswitchsolutions.com
>>>>
>>>> 
>>>> 
>>>>
>>>> Official FreeSWITCH Sites
>>>> http://www.freeswitch.org
>>>> http://wiki.freeswitch.org
>>>> http://www.cluecon.com
>>>>
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>>>> FreeSWITCH-users at lists.freeswitch.org
>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
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>>>>
>>>>
>>>
>>>
>>> --
>>> Anthony Minessale II
>>>
>>> FreeSWITCH http://www.freeswitch.org/
>>> ClueCon http://www.cluecon.com/
>>> Twitter: http://twitter.com/FreeSWITCH_wire
>>>
>>> AIM: anthm
>>> MSN:anthony_minessale at hotmail.com
>>> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
>>> IRC: irc.freenode.net #freeswitch
>>>
>>> FreeSWITCH Developer Conference
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>>> googletalk:conf+888 at conference.freeswitch.org
>>> pstn:+19193869900
>>> _________________________________________________________________________
>>> Professional FreeSWITCH Consulting Services:
>>> consulting at freeswitch.org
>>> http://www.freeswitchsolutions.com
>>>
>>> 
>>> 
>>>
>>> Official FreeSWITCH Sites
>>> http://www.freeswitch.org
>>> http://wiki.freeswitch.org
>>> http://www.cluecon.com
>>>
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>>>
>>>
>>>
>>> _________________________________________________________________________
>>> Professional FreeSWITCH Consulting Services:
>>> consulting at freeswitch.org
>>> http://www.freeswitchsolutions.com
>>>
>>> 
>>> 
>>>
>>> Official FreeSWITCH Sites
>>> http://www.freeswitch.org
>>> http://wiki.freeswitch.org
>>> http://www.cluecon.com
>>>
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>>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-users mailing list
>> FreeSWITCH-users at 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
>
> FreeSWITCH http://www.freeswitch.org/
> ClueCon http://www.cluecon.com/
> Twitter: http://twitter.com/FreeSWITCH_wire
>
> AIM: anthm
> MSN:anthony_minessale at hotmail.com
> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
> IRC: irc.freenode.net #freeswitch
>
> FreeSWITCH Developer Conference
> sip:888 at conference.freeswitch.org
> googletalk:conf+888 at conference.freeswitch.org
> pstn:+19193869900
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>
>
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