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SDP attributes defined in RFC 5576

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Source-Specific Media Attributes
ssrc,  ssrc-group

  see also:    group

RFC 5576 – Section 4

Section 10

IANA Semantics for the "ssrc-group" SDP Attribute

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   =