[Freeswitch-users] Mod_shout using with icecast Big delay

Anthony Minessale anthony.minessale at gmail.com
Mon Aug 19 19:22:22 MSD 2013 

Is there a a real significance to it being 12 seconds of delay?  The people
listening will not know it.  I am just wondering if there is a tangible
problem with it or if its just obsession when listening to it in a test env.




On Mon, Aug 19, 2013 at 8:40 AM, Michael Jerris <mike at jerris.com> wrote:

> But this would still include buffering… although it should be less than 12
> seconds.
>
> On Aug 16, 2013, at 8:04 PM, Seven Du <dujinfang at gmail.com> wrote:
>
>  Another solution would to use flash with mod_rtmp.  And to make that work
> better you need to change the flash code to remove the sound input device
> since you don't need it and this also helps to remove the confirmation
> prompt anytime you use a sound input in flash.
>
> I think I had written a plugin for flowplayer long time ago which works
> well.
>
>
> --
> Seven Du
> http://www.freeswitch.org.cn
> http://about.me/dujinfang
> http://www.dujinfang.com
>
> Sent with Sparrow <http://www.sparrowmailapp.com/?sig>
>
> On Saturday, August 17, 2013 at 2:22 AM, Jorge Núñez wrote:
>
> So Can anybody tell any other solution instead of webrtc and icecast to
> broadcast a conference in realtime without delay or maybe just a little bit
> of delay 1s or 2s?
>
> Thank you very much for your help
>
> Jorge
>
>
> 2013/8/15 Jeff Leung <jleung at v10networks.ca>
>
> 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****
> ------------------------------
> _________________________________________________________________________
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> --
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> ** **
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> --
> Anthony Minessale II
>
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> --
> Anthony Minessale II
>
> FreeSWITCH http://www.freeswitch.org/
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-- 
Anthony Minessale II

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