tech-invite   World Map     

IETF     RFCs     Groups     SIP     ABNFs    |    3GPP     Specs     Glossaries     Architecture     IMS     UICC    |    search

 

ABNF for SDP – Session Description Protocol

|   Session Description   |   v=   |   o=   |   s=   |   i=   |   u=   |   e=   |   p=   |   c=   |   b=   |   t=  r=  z=   |   k=   |   a=   |   m=   |   SDP Addressing   |   SDP generic rules   |   "a=" SDP Attributes   |

Here          Top          Up          Prev          Next

 

a=ssrc:   (media-level)
a=ssrc-group:   (media-level)
;  a=ssrc:<ssrc-id>   cname:<cname>:   (source-level)
;  a=ssrc:<ssrc-id>   previous-ssrc: ...   (source-level)
;  a=ssrc:<ssrc-id>   fmtp:<format> <format specific parameters>   (source-level)


attribute   =/
ssrc-attr   =
"ssrc:"   ssrc-id   SP   attribute

ssrc-group-attr   =
"ssrc-group:"   semantics   *( SP   ssrc-id )

semantics   =
"FEC"  /     ;  see   RFC 5576
"FID"  /     ;  see   RFC 5576
"FEC-FR"  /     ;  see   RFC 5956 – Section 4.3
"DUP"  /     ;  see   RFC 7104 – Section 3.2
token

cname-attr   =
"cname:"   cname

previous-ssrc-attr   =
"previous-ssrc:"   ssrc-id   *( SP   ssrc-id )

cname   =
byte-string
;  following the syntax conventions for CNAME as defined in   RFC 3550 – Section 6.5.1,
; with guidelines in   RFC 7022

ssrc-id   =

Up