Standards Track A. Rao Netscap - RFC Editor

RFC 2326 Real Time Streaming Protocol April 1998Overview of RTSP header fields12.1 AcceptThe Accept request-header field can be used to specify certainpresentation description content types which are acceptable for theresponse.The "level" parameter for presentation descriptions is properlydefined as part of the MIME type registration, not here.See [H14.1] for syntax.Example of use:Accept: application/rtsl, application/sdp;level=212.2 Accept-EncodingSee [H14.3]12.3 Accept-LanguageSee [H14.4]. Note that the language specified applies to thepresentation description and any reason phrases, not the mediacontent.12.4 AllowThe Allow response header field lists the methods supported by theresource identified by the request-URI. The purpose of this field isto strictly inform the recipient of valid methods associated with theresource. An Allow header field must be present in a 405 (Method notallowed) response.Example of use:Allow: SETUP, PLAY, RECORD, SET_PARAMETER12.5 AuthorizationSee [H14.8]12.6 BandwidthThe Bandwidth request header field describes the estimated bandwidthavailable to the client, expressed as a positive integer and measuredin bits per second. The bandwidth available to the client may changeduring an RTSP session, e.g., due to modem retraining.Schulzrinne, et. al. Standards Track [Page 46]