[Asterisk-Dev] media stream implementation

[Steven Critchfield]

On Fri, 2004-10-08 at 18:23 -0400, m. smadi wrote:
> hi;
> 
> 1) i use asterisk as SIP to PSTN gatway and that my SIP devices use the 
> iLBC encoding:
>   a- Which file reads the RTP stream from the socket?
>   b- let's say we want to transcoding to GSM coding where is this done?
> 
> 2) if we were going the other way around (i.e. PSTN to SIP through FXO 
> ports):
>   a- which file read the media stream from the FXO port?
>   b- which file performs the transcoding to the iLBC coding?
> 
> I am interested in calculating the energy lost when transcoding, and I 
> would like to log the actual payloads of the RTP stream, meaning I would 
> like to operate on packet per packet basis and not byte by byte: where 
> is the best place to do that?
> thanks

While not necessarily the most easy way to get at the raw audio data,
pcap is an important thing to know about.  Google for pcap.
-- 
Steven Critchfield <critch at basesys.com>