2.2.6.4 Cookie

The syntax of the Cookie header is specified in [RFC2109] section 4.2.2.

This header is defined for use in requests sent to a server. Clients SHOULD share a single repository for RTSP cookies and HTTP cookies, and treat http:// and rtsp:// URLs as a single protocol.

This means that if a cookie is set for the URL http://example.com/ by using the HTTP protocol, and the client sends an RTSP Describe request for the URL rtsp://example.com/, the cookie SHOULD be included in the Describe request even though it was originally obtained through HTTP.