[Freeswitch-users] Record and live stream WAV to HTTP server

Tue Apr 5 13:36:10 MSD 2016

Ok thanks.
It looks promising !
I'll dig into mod_vlc.

Best

Vincent

On Tue, Apr 5, 2016 at 10:04 AM, Sergey Safarov <s.safarov at gmail.com> wrote:

> Think is requred streaming feature of freeswitch.
> Look at mod_esf
> <https://freeswitch.org/confluence/display/FREESWITCH/mod_esf> and mod_vlc
> <https://wiki.freeswitch.org/wiki/Mod_vlc>
> Instruction to compile mod_vlc on provided link is to old but helpfull to
> undestand how to stream media to http server.
>
> For compiling mod_vlc please use vlc repo
> <https://freeswitch.org/stash/projects/SD/repos/vlc/browse> and centos
> instruction
> <https://freeswitch.org/confluence/display/FREESWITCH/Creating+RPM+repositary>
> .
> After you intall vlc, then you can enable mod_vlc module in freeswitch
> sources(SPEC file) and compile freeswitch.
>
> Sergey
>
>
> вт, 5 апр. 2016 г. в 10:31, Vincent Gire <vincent.gire at gmail.com>:
>
>> webdav, mod_http_cache or mod_httapi all results in sending the recording
>> only *after* it is complete.
>> They all write the recording to a file, wait for the recording to
>> complete and the file to close and then send it over HTTP.
>>
>> I would like to start sending the recording to the remove server as soon
>> as it starts (max 1 sec latency).
>> mod_http_cache or mod_httapi would be perfect if they were streaming the
>> recording like mod_shout.
>>
>>
>> On Mon, Apr 4, 2016 at 8:50 PM, Sergey Safarov <s.safarov at gmail.com>
>> wrote:
>>
>>> Input/output latency is not problem.  I use Kazoo on my servers and call
>>> recording is stored to database during 5 seconds after hangup.
>>> What is broken in your case if save file using webdav or http_cache?
>>>
>>> On Mon, Apr 4, 2016, 21:10 Vincent Gire <vincent.gire at gmail.com> wrote:
>>>
>>>> Hello Sergey,
>>>>
>>>> Thank you for your answer.
>>>> I've looked into webdav mounted filesystem.
>>>>
>>>> Unfortunately, most WebDav clients (especially davfs2 on debian) do a
>>>> lot of buffering, caching and even lock-null requests (lock a non existent
>>>> resource before writing to it). I also suspect that they wait for the end
>>>> of the write operation.
>>>> The result is a latency of a few seconds witch is not much better than
>>>> what I achieve with mod_shout if I transcode the MP3.
>>>>
>>>> Any other idea ?
>>>>
>>>> Thank you !
>>>>
>>>> Best regards
>>>>
>>>> Vincent
>>>>
>>>> On Sun, Apr 3, 2016 at 7:30 PM, Sergey Safarov <s.safarov at gmail.com>
>>>> wrote:
>>>>
>>>>> Please look at webdav mounted filesystem.
>>>>>
>>>>> On Sun, Apr 3, 2016, 19:17 Vincent Gire <vincent.gire at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> Hi all,
>>>>>>
>>>>>> Thank you to all contributing to FreeSWITCH !
>>>>>>
>>>>>> I'm working on a IVR project where logic is implemented on a HTTP
>>>>>> server.
>>>>>> We are leaving Twilio because we now need to record and live stream
>>>>>> the session to the HTTP server in WAV format (chunked transfer encoding).
>>>>>>
>>>>>> *mod_httapi* looks great (HT TAPI very similar to Twilio's) but it
>>>>>> seems that the records are first saved to disk before there are sent to the
>>>>>> server as chunked data.
>>>>>> We need the transfer to start as soon as the recording starts.
>>>>>>
>>>>>> *mod_shout* does start the request almost as the records starts but
>>>>>> it does not support WAV file and shout:// is not exactly a HTTP request
>>>>>> (SOURCE method instead of PUT).
>>>>>>
>>>>>> Is there a way to use these modules to achieve our goal ?
>>>>>>
>>>>>> If not, we are willing to author a specific module or rather
>>>>>> contribute to the existing ones.
>>>>>>
>>>>>> We've identified two approaches:
>>>>>>
>>>>>>    1. From *mod_httapi* Modify mod_httapi to directly stream the
>>>>>>    record instead of completely saving it to disk before the HTTP chunked
>>>>>>    transfer starts.
>>>>>>    This seems the most logical but with more than 3000 lines,
>>>>>>    mod_httapi does not seem to be the easiest module to build upon for
>>>>>>    newcomers!
>>>>>>
>>>>>>    2. From *mod_shout*
>>>>>>       1. Modify libshoot to replace the custom SOURCE method with
>>>>>>       standard HTTP PUT method
>>>>>>       2. Modify mod_shout to support wav files
>>>>>>       3. Implement our IVR in script (javascript/lua)
>>>>>>
>>>>>> What do you think ?
>>>>>>
>>>>>> Thank you for your help.
>>>>>>
>>>>>> Cheers,
>>>>>> Vincent
>>>>>>
>>>>>> _________________________________________________________________________
>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>> consulting at freeswitch.org
>>>>>> http://www.freeswitchsolutions.com
>>>>>>
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>>>>>
>>>>>
>>>>>
>>>>> _________________________________________________________________________
>>>>> Professional FreeSWITCH Consulting Services:
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>>>>>
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>>>>
>>>>
>>>>
>>>> --
>>>> Vincent Gire
>>>>
>>>> _________________________________________________________________________
>>>> Professional FreeSWITCH Consulting Services:
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>>>> http://www.freeswitchsolutions.com
>>>>
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>>>
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>>
>>
>>
>> --
>> Vincent Gire
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://confluence.freeswitch.org
>> http://www.cluecon.com
>>
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>
>
> _________________________________________________________________________
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>
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>
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-- 
Vincent Gire
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