2.2.5.3 RTP Payload Format for ASF Data Packets

The RTP payload format for ASF data packets, as specified in section 2.2.1, MUST be identified by the MIME type "audio/x-asf-pf" for audio streams, "video/x-asf-pf" for video streams, and "application/x-asf-pf" for streams that are neither audio nor video.

The RTP clock frequency MUST be 1,000 Hz.

Example:

 m=audio 0 RTP/AVP 96
 a=rtpmap:96 x-asf-pf/1000