Add Codec Column to main interface

[pksml85]

Hi Kaian. I am doing some codec analysis and it would be very helpful to have a column option for the agreed-upon codec in SIP invite dialogs. This would save me from having to inspect each dialog individually to see which codec was used.

For example, the last SDP message from the dialog has this data:
m=audio 19064 RTP/SAVP 9 101
a=rtpmap:9 G722/8000
a=rtpmap:101 telephone-event/8000

My feature request would be for a Codec column option on the main interface on sngrep that would show something like 9/G722/8000.
(I assume that the last SDP message would be the most accurate, considering the possibility of late-inbound negotiation.)

Perhaps this column would be populated only for COMPLETED dialogs, since CANCELLED/BUSY dialogs do not have a completed codec exchange between both parties.

Thanks for your consideration!

[LCEbay]

I also would really like this feature.

I assume that the last SDP message would be the most accurate

Calls sometimes switch codecs multiple times throughout the call. For example, a call could start off at an IVR, be answered by a phone, be placed on hold, and then be answered by a different phone. Any combination of those might support one or more codecs (that is in common with the caller). The call might start off with G711 for the IVR, re-negotiate to G722 for the first phone and hold music, and then go back to G711 for the second phone.

A few thoughts on what could be displayed if multiple codecs were actually used:

• Display the one that was used for the most amount of time
• Display one of them (which one?), followed by an asterisk
• Display some keyword, to indicate multiple codecs were used, such as MULTIPLE or maybe just an asterisk
• Display them all, which may cause issues with the width
• Display all codecs that were used for more than x seconds