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ABNF Notation
Session Description
Addressing
generic rules
"a=" SDP Attributes
SDP attributes defined in
RFC 8285 – RTP Header Extensions
RFC 8285
–
Section 8
–
Section 6
a=
extmap
a=
extmap‑allow‑mixed
attribute
=/
extmap
/
extmap‑allow‑mixed
extmap
=
mapentry
SP
enc-extensionname
extensionname
[
SP
extensionattributes
]
mapentry
=
"
extmap:
" 1*5
DIGIT
[ "
/
"
direction
]
direction
=
"
sendonly
" / "
recvonly
" / "
sendrecv
" / "
inactive
"
enc-extensionname
=
%x75.72.6e.3a.69.65.74.66.3a.70.61.72.61.6d.73.3a %x72.74.70.2d.68.64.72.65.78.74.3a.65.6e.63.72.79.70.74
; "urn:ietf:params:rtp-hdrext:encrypt" in lower case
; See:
RFC 6904 – Section 4
extensionname
=
URI
extensionattributes
=
byte-string
extmap-allow-mixed
=
"
extmap-allow-mixed
"