[Freeswitch-users] setting recording codec

Tue Nov 11 17:46:30 MSK 2014

Getting the lib to do it is easy.  It's mainly an API problem- how will FS
expose something like this?

On Tue, Nov 11, 2014 at 9:38 AM, Brian West <brian at freeswitch.org> wrote:

> Looking at the libsndfile API this should be doable but I would need to
> read up on it more, If you require this feature email
> consulting at freeswitch.org for a quote on adding this functionality.
>
> Thanks
>
> On Tue, Nov 11, 2014 at 8:33 AM, Brian West <brian at freeswitch.org> wrote:
>
>> If he wants to record without transcoding it is the only viable way to do
>> so currently via mod_native_file.  The task was a nice exercise as it
>> exposed a nice little segfault in the stop record. (FS-6980).
>>
>> I fully understood what he wanted, and that it wasn't possible, offering
>> up what we currently can do with mod_native_file.
>>
>>
>> On Tue, Nov 11, 2014 at 7:49 AM, Ben Langfeld <ben at langfeld.co.uk> wrote:
>>
>>> Brian, was this answer supposed to be to some other question? The
>>> question here was about transcoding the recording, not about stereo vs two
>>> mono recordings...
>>>
>>> On 11 November 2014 11:35, Brian West <brian at freeswitch.org> wrote:
>>>
>>>> just record to a file without any extension.
>>>>
>>>>     <extension name="testing">
>>>>
>>>>
>>>>
>>>>       <condition field="destination_number" expression="^(1213)$">
>>>>
>>>>
>>>>
>>>>         <action application="answer"/>
>>>>
>>>>
>>>>
>>>>         <action application="record_session" data=
>>>> "/tmp/${uuid}-testing"/>
>>>>
>>>>
>>>>         <action application="sleep" data="50000"/>
>>>>
>>>>
>>>>
>>>>       </condition>
>>>>
>>>>
>>>>
>>>>     </extension>
>>>>
>>>>
>>>> 2014-11-11 07:32:26.713403 [INFO] mod_native_file.c:101 Opening File
>>>> [/tmp/6f1e83a6-1d06-4e31-b641-7d4f825c99d6-testing-in.G722] 16000hz
>>>>
>>>> 2014-11-11 07:32:26.713403 [INFO] mod_native_file.c:101 Opening File
>>>> [/tmp/6f1e83a6-1d06-4e31-b641-7d4f825c99d6-testing-out.G722] 16000hz
>>>>
>>>> Now you'll be all set to waste more time dealing with two files vs the
>>>> single wav file.
>>>>
>>>> On Tue, Nov 11, 2014 at 4:33 AM, ik <idokan at gmail.com> wrote:
>>>>
>>>>> In this specific case, I'm using g711, but can have either a-law or
>>>>> u-law but the service that requires the recording understand only a-law, at
>>>>> the moment I'm using ffmpeg to convert after the call ended,  and then send
>>>>> it to that service.
>>>>>
>>>>> Thanks
>>>>> Ido
>>>>> On Nov 11, 2014 12:24 PM, "Stanislav Sinyagin" <ssinyagin at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> as far as I understand, FreeSWITCH chooses the WAV parameters which
>>>>>> are matching the current channel sampling frequency and codec. For
>>>>>> example, if you record a G722 call, you would get a 16kHZ WAV file.
>>>>>>
>>>>>> Forcing it into one specific encoding would add real-time CPU load. I
>>>>>> think it's still more preferable to run a post-processing job in low
>>>>>> priority -- this way you ensure that the ongoing calls get the best
>>>>>> serving.
>>>>>>
>>>>>> You can easily catch the event of call ending and trigger the
>>>>>> conversion job, by listening to the events via ESL connection.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Tue, Nov 11, 2014 at 10:52 AM, ik <idokan at gmail.com> wrote:
>>>>>> > Thinking in learning better the source code, and might create my
>>>>>> first patch
>>>>>> > to FS :)
>>>>>> >
>>>>>> > On Tue, Nov 11, 2014 at 8:09 AM, Seven Du <dujinfang at gmail.com>
>>>>>> wrote:
>>>>>> >>
>>>>>> >> No. Maybe bounty it?
>>>>>> >>
>>>>>> >> On Monday, November 10, 2014 at 8:53 PM, ik wrote:
>>>>>> >>
>>>>>> >> Hello,
>>>>>> >>
>>>>>> >> I could not find any documentation on this subject.
>>>>>> >> I require to have a recording of an a-law wav file (RIFF
>>>>>> (little-endian)
>>>>>> >> data, WAVE audio, ITU G.711 A-law, mono 8000 Hz).
>>>>>> >>
>>>>>> >> Can I set a variable that tells the record command what type of
>>>>>> codec to
>>>>>> >> store the file with ?
>>>>>> >>
>>>>>> >> I know how to convert a normal wav recording into it using ffmpeg
>>>>>> (for
>>>>>> >> example):
>>>>>> >>
>>>>>> >> $ ffmpeg -i 0.wav -ar 8000 -ac 1 -acodec pcm_alaw 0-alaw.wav
>>>>>> >>
>>>>>> >> But I wish to avoid it, if I can use the record app, or use the
>>>>>> >> uuid_record API for it.
>>>>>> >>
>>>>>> >> Thanks,
>>>>>> >> Ido
>>>>>> >>
>>>>>> _________________________________________________________________________
>>>>>> >> 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
>>>>>> >>
>>>>>> >> FreeSWITCH-users mailing list
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>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> _________________________________________________________________________
>>>>>> >> 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
>>>>>> >>
>>>>>> >> FreeSWITCH-users mailing list
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>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> _________________________________________________________________________
>>>>>> > 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
>>>>>> >
>>>>>> > FreeSWITCH-users mailing list
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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://confluence.freeswitch.org
>>>>>> http://www.cluecon.com
>>>>>>
>>>>>> FreeSWITCH-users mailing list
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>>>>>>
>>>>>
>>>>>
>>>>> _________________________________________________________________________
>>>>> 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
>>>>>
>>>>> FreeSWITCH-users mailing list
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>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>>
>>>> *Brian West*
>>>> brian at freeswitch.org
>>>>
>>>>
>>>> *Twitter: @FreeSWITCH , @briankwest*
>>>> http://www.freeswitchbook.com
>>>> http://www.freeswitchcookbook.com
>>>>
>>>> *T:*+19184209001 | *F:*+19184209002 | *M:*+1918424WEST (9378)
>>>> *iNUM:*+883 5100 1420 9001 | *ISN:*410*543 | *Skype:*briankwest
>>>>
>>>>
>>>> _________________________________________________________________________
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>>>> 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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>>>
>>>
>>> _________________________________________________________________________
>>> Professional FreeSWITCH Consulting Services:
>>> consulting at freeswitch.org
>>> http://www.freeswitchsolutions.com
>>>
>>> Official FreeSWITCH Sites
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>>>
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>>>
>>
>>
>>
>> --
>>
>> *Brian West*
>> brian at freeswitch.org
>>
>>
>> *Twitter: @FreeSWITCH , @briankwest*
>> http://www.freeswitchbook.com
>> http://www.freeswitchcookbook.com
>>
>> *T:*+19184209001 | *F:*+19184209002 | *M:*+1918424WEST (9378)
>> *iNUM:*+883 5100 1420 9001 | *ISN:*410*543 | *Skype:*briankwest
>>
>
>
>
> --
>
> *Brian West*
> brian at freeswitch.org
>
>
> *Twitter: @FreeSWITCH , @briankwest*
> http://www.freeswitchbook.com
> http://www.freeswitchcookbook.com
>
> *T:*+19184209001 | *F:*+19184209002 | *M:*+1918424WEST (9378)
> *iNUM:*+883 5100 1420 9001 | *ISN:*410*543 | *Skype:*briankwest
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
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> http://confluence.freeswitch.org
> http://www.cluecon.com
>
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