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From Тимур Тлеукенов <timur.tleuke...@gmail.com>
Subject Re: SoundCodec in SIP Integration
Date Wed, 22 Feb 2012 17:08:16 GMT
The 8KHz required by NellyMozer implementation in SIP-transport.
I think there must be some opportunity to make it work with another
sampling rate, the codec specification allows it.
May be codec implementation should be replaced.

On Wed, Feb 22, 2012 at 11:53 PM, seba.wagner@gmail.com <
seba.wagner@gmail.com> wrote:

> Yes,
>
> but my problem is that I did exactly that, I was switching the codec to
> Speex in OpenMeetings and tested the recording, the problem was that FFMPEG
> was not able to strip the audio correctly from the stream.
>
> However I think there are also some changes in your code required to
> transcode Speex2GSM and GSM2Speex.
>
> The 8KHz sample rate is a strict requirement? I think 8KHz is rather bad
> quality, is it possible to use higher sampling rate? Maybe 16 or 32 KHz?
>
> Sebastian
>
>
> 2012/2/22 Тимур Тлеукенов <timur.tleukenov@gmail.com>
>
>> Hi Sebastian,
>>
>> It uses NellyMoser and g.711 U-law. Stream from openmeetings encoded with
>> NellyMozer, SIP transport transcodes its to g.711.
>> g.711 packets from SIP-server are transferred to red5 without any changes.
>>
>> Currently it supports only NellyMozer codec with 8KHz sampling frequency,
>> so in openmeetings config.xml microphoneRateBest must be set to value 8.
>>
>> Codec g.711 U-law has been selected because it is supported by both flash
>> player and Asterisk.
>>
>> ActionSctipt 3 gives ability to specify codec, so when we switch
>> openmeetings to new video component, NellyMozer codec will not be required
>> at all.
>>
>> On Wed, Feb 22, 2012 at 10:54 PM, seba.wagner@gmail.com <
>> seba.wagner@gmail.com> wrote:
>> > Hi Timur,
>> >
>> > your SIP integration implementation, does it require to configure a
>> special
>> > Codec for the Audio in the Flash Stream?
>> > It does work currently with NellyMoser right?
>> >
>> > Sebastian
>> >
>> > --
>> > Sebastian Wagner
>> > http://www.openmeetings.de
>> > http://incubator.apache.org/openmeetings/
>> > http://www.webbase-design.de
>> > http://www.wagner-sebastian.com
>> > seba.wagner@gmail.com
>>
>>
>>
>> --
>> Timur Tleukenov
>>
>>
>
>
> --
> Sebastian Wagner
> http://www.openmeetings.de
> http://incubator.apache.org/openmeetings/
> http://www.webbase-design.de
> http://www.wagner-sebastian.com
> seba.wagner@gmail.com
>



-- 
Timur Tleukenov

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