[asterisk-users] Problems with codec translation when using Monitor and MixMonitor

[Jim Dickenson]

Here is a matrix we put together about g729 license needs:

========================     ======================     =========================     ======     =======     ========     ========
Asterisk to SIP Provider     SIP Client to Asterisk     asterisk.conf sln defined     record     monitor     encoders     decoders
========================     ======================     =========================     ======     =======     ========     ========
ulaw                         ulaw                       yes                           yes        yes            0            0
ulaw                         ulaw                       yes                           yes        no             0            0    
ulaw                         ulaw                       yes                           no         no             0            0    
ulaw                         ulaw                       yes                           no         yes            0            0

ulaw                         ulaw                       no                            yes        yes            0            0
ulaw                         ulaw                       no                            yes        no             0            0
ulaw                         ulaw                       no                            no         no             0            0
ulaw                         ulaw                       no                            no         yes            0            0

ulaw                         g729                       yes                           yes        yes            3            3
ulaw                         g729                       yes                           yes        no	        2            3
ulaw                         g729                       yes                           no         no             1            1
ulaw                         g729                       yes                           no         yes            3            3

ulaw                         g729                       no                            yes        yes            3            3
ulaw                         g729                       no                            yes        no             2            3
ulaw                         g729                       no                            no         no             1            1
ulaw                         g729                       no                            no         yes            3            3

g729                         ulaw                       yes                           yes        yes            2            5
g729                         ulaw                       yes                           yes        no             2            5
g729                         ulaw                       yes                           no         no             1            1
g729                         ulaw                       yes                           no         yes            2            3

g729                         ulaw                       no                            yes        yes            2            5
g729                         ulaw                       no                            yes        no             2            5
g729                         ulaw                       no                            no         no             1            1
g729                         ulaw                       no                            no         yes            2            3

g729                         g729                       yes                           yes        yes            4            7
g729                         g729                       yes                           yes        no             3            7
g729                         g729                       yes                           no         no             1            1
g729                         g729                       yes                           no         yes            4            5

g729                         g729                       no                            yes        yes            4            7
g729                         g729                       no                            yes        no             3            7
g729                         g729                       no                            no         no             1            1
g729                         g729                       no                            no         yes            4            5

-- 
Jim Dickenson
mailto:dickenson at cfmc.com

CfMC
http://www.cfmc.com/



On Jan 12, 2012, at 3:00 PM, Kevin P. Fleming wrote:

> On 01/12/2012 11:57 AM, Daniel - Asterisk wrote:
>> The simplest answer, I purchased one additional license and one
>> simultaneous call is being recorded now. I do not understand why the
>> ulaw codec (or format) is involved here (... No translator path from
>> alaw to unknown ...)
>> 
>> Any entry will be very appreciated.
> 
> When you say 'call', do you mean a call between two phones (endpoints)? If so, and both endpoints are using G.729 for audio, then yes, recording that call in any format other than G.729 will require *two* G.729 decoders, one for each audio stream being received by Asterisk. Even in a case where you are only recording the combined audio from the two phones (MixMonitor), the audio must still be decoded in order to be mixed.
> 
> -- 
> Kevin P. Fleming
> Digium, Inc. | Director of Software Technologies
> Jabber: kfleming at digium.com | SIP: kpfleming at digium.com | Skype: kpfleming
> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
> Check us out at www.digium.com & www.asterisk.org
> 
> --
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