[asterisk-users] Re: can't transcode ilbc

[Martin Joseph]

On 2006-10-02 04:02:56 -0700, "James Harper" 
<james.harper at bendigoit.com.au> said:

> I'm getting messages like 'WARNING[10263]: chan_sip.c:2552 sip_write:
> Asked to transmit frame type 8, while native formats is 1024 (read/write
> = 1024/1024)', where 8 = alaw and 1024 = ilbc.
> 
> If I do show translation I get this:
> *CLI> show translation
>          Translation times between formats (in milliseconds)
>           Source Format (Rows) Destination Format(Columns)
> 
>          g723   gsm  ulaw  alaw  g726 adpcm  slin lpc10  g729 speex
> ilbc
>    g723     -     -     -     -     -     -     -     -     -     -
> -
>     gsm     -     -     7     7    14     7     6    19     -    93
> -
>    ulaw     -    17     -     1     9     2     1    14     -    88
> -
>    alaw     -    17     1     -     9     2     1    14     -    88
> -
>    g726     -    23     8     8     -     8     7    20     -    94
> -
>   adpcm     -    17     2     2     9     -     1    14     -    88
> -
>    slin     -    16     1     1     8     1     -    13     -    87
> -
>   lpc10     -    24     9     9    16     9     8     -     -    95
> -
>    g729     -     -     -     -     -     -     -     -     -     -
> -
>   speex     -    27    12    12    19    12    11    24     -     -
> -
>    ilbc     -     -     -     -     -     -     -     -     -     -
> -
> 
> which I think means that there is no translation/transcoding path
> between ilbc and anything else.
> 
> Is there some configuration option I need to set somewhere to allow this
> transcoding to take place or is there something about the ilbc protocol
> which makes transcoding a bad idea?
> 
> The call in question is:
> 
> SJphoneA -> AsteriskA -> mynetfone -> AsteriskB -> SJphoneB
> 
> SJphoneA and SJphoneB both have a clear path to each other (tunnel), but
> when AsteriskA calls mynetfone, it uses nat. I don't think nat is a
> problem in this case though.
> 
> Any suggestions? I'm also seeing the same thing when I try to make a
> call like:
> SJphone -> Asterisk -> PBX (via mISDN)
> 
> SJphone is talking ilbc to Asterisk, but obviously Asterisk talks alaw
> to the PBX, and Asterisk refuses to transcode.


That seems odd to me, since I didn't do anything special to my install 
1.2.10 and ilbc can be translated for me?  Sorry I have no ideas, but 
wanted to let you know, that apparently it is just you.

If you are running 1.2.10 you should update, as there was a bug that 
affected translations as I recall.  Maybe that's the issue?

Good Luck,
Marty