[SIPForum-discussion] m line with port 0 and no codec is supported ?

S, Vinish (Vinish) vinishs at avaya.com
Thu Dec 3 11:43:01 UTC 2015

Hi All ,

I have scenario , in which for one of the UA send  the hold invite (Re-invite) which has SDP with mline  with port 0 and no codecs .For which the parsing fails in the UAS.

                    m=video 0 RTP/AVP

RFC3264   mentions following

"  Existing media streams are removed by creating a new SDP with the

   port number for that stream set to zero.  The stream description MAY

   omit all attributes present previously, and MAY list just a single

   media format."

Is the attributes mentioned here is codec or it is attribute lines of SDP ?

Thanks and regards
Vinish S

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