The sdp_find_media_rtpmap() function searches the attribute list of the media structure that is specified by the media parameter for the format entry that is specified by the format parameter.
Return Values: The sdp_find_media_rtpmap() function returns a pointer to the format entry (sdp_attr_t *) that is specified by the name parameter when the function completes successfully. In all other cases, the sdp_find_media() function returns a value of NULL.
The incomplete SDP description in this example has two sections, an audio section and a video section.
m=audio 49170 RTP/AVP 0 8 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 m=video 51372 RTP/AVP 31 32 a=rtpmap:31 H261/90000 a=rtpmap:32 MPV/90000 /* * Assuming that above description is parsed using sdp_parse() and that * the parsed structure is in "session" sdp_session_t structure. */ sdp_media_t *video; sdp_attr_t *mpv; video = sdp_find_media(session->s_media, "video); mpv = sdp_find_media_rtpmap(video, "32"); /* * Now the attribute structure sdp_attr_t, mpv will be having * values from the attribute field "a=rtpmap:32 MPV/90000" */