sip-media-negotiation

Installation
SKILL.md

SIP Media Negotiation

Master Session Description Protocol (SDP) offer/answer model, codec negotiation, and media session establishment for building robust VoIP applications with optimal media handling.

Understanding SDP and Media Negotiation

SDP (RFC 4566) is used in SIP to describe multimedia sessions. The SDP offer/answer model (RFC 3264) enables endpoints to negotiate media capabilities, codecs, and transport parameters.

SDP Structure and Syntax

Basic SDP Message

v=0
o=alice 2890844526 2890844527 IN IP4 atlanta.example.com
s=VoIP Call
c=IN IP4 192.0.2.1
t=0 0
m=audio 49170 RTP/AVP 0 8 97
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