[Freeswitch-users] Mod_shout using with icecast Big delay

Thu Aug 15 17:27:38 MSD 2013

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
> 
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>  
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> -- 
> Anthony Minessale II
> 
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