+static int is_realtime(AVFormatContext *s)
+{
+ if( !strcmp(s->iformat->name, "rtp")
+ || !strcmp(s->iformat->name, "rtsp")
+ || !strcmp(s->iformat->name, "sdp")
+ )
+ return 1;
+
+ if(s->pb && ( !strncmp(s->filename, "rtp:", 4)
+ || !strncmp(s->filename, "udp:", 4)
+ )
+ )
+ return 1;
+ return 0;
+}
+