title: webrtc sdp attribute a=max-recv-ssrc
body: <p>I am receiving multiple camera tracks in single rtp session. In one of the document it is mentioned like we need to add sdp attribute <code>a=max-recv-ssrc:{*:4}</code> in the sdp offer. may i know how to add this attribute to sdp?</p>
  <p><a href="https://tools.ietf.org/id/draft-westerlund-mmusic-max-ssrc-00.html#:%7E:text=A%20given%20SSRC%20value%20is,(e.g.%20audio%20or%20video)" rel="nofollow noreferrer">https://tools.ietf.org/id/draft-westerlund-mmusic-max-ssrc-00.html#:~:text=A%20given%20SSRC%20value%20is,(e.g.%20audio%20or%20video)</a>.</p>