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2.2.5 Session Description Protocol Extensions

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This section defines extensions to the SDP. SDP is specified in [RFC4566], but there are constraints and extensions that apply when SDP is used in conjunction with RTSP, as specified in [RFC2326] Appendix C. RTSP Windows Media Extensions define additional extensions to SDP that apply when SDP is used in conjunction with RTSP.

This section defines the syntax of SDP fields by using ABNF [RFC5234] .