GstRTSPSdp
gboolean gst_rtsp_sdp_from_media (GstSDPMessage *sdp, GstSDPInfo *info, GstRTSPMedia *media);
GstSDPMessage *sdp
GstSDPInfo *info
GstRTSPMedia *media
typedef struct { gboolean is_ipv6; const gchar *server_ip; } GstSDPInfo;