+#define RTSP_FLAG_CUSTOM_IO 0x4 /**< Do all IO via the AVIOContext. */
+#define RTSP_FLAG_RTCP_TO_SOURCE 0x8 /**< Send RTCP packets to the source
+ address of received packets. */
+
+typedef struct RTSPSource {
+ char addr[128]; /**< Source-specific multicast include source IP address (from SDP content) */
+} RTSPSource;