url_split(NULL, 0, hostname, sizeof(hostname), &port,
url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port,
int rtp_set_remote_url(URLContext *h, const char *uri){    RTPContext *s = h->priv_data;    char hostname[256];    int port;    char buf[1024];    char path[1024];        url_split(NULL, 0, hostname, sizeof(hostname), &port,               path, sizeof(path), uri);    snprintf(buf, sizeof(buf), "udp://%s:%d%s", hostname, port, path);    udp_set_remote_url(s->rtp_hd, buf);    snprintf(buf, sizeof(buf), "udp://%s:%d%s", hostname, port + 1, path);    udp_set_remote_url(s->rtcp_hd, buf);    return 0;}