rtpproto: Allow specifying a separate rtcp port in ff_rtp_set_remote_url

A separate rtcp port can already be set when opening the rtp
protocol normally, but when doing port setup as in RTSP (where
we first need to open the local ports and pass them to the peer,
and only then receive the remote peer port numbers), we didn't
check the same url parameter as in the normal open routine.

Signed-off-by: Martin Storsjö <martin@martin.st>

1 files changed, 11 insertions, 2 deletions

diff --git a/libavformat/rtpproto.c b/libavformat/rtpproto.c
index b21c1219c8..974aa351a5 100644
--- a/libavformat/rtpproto.c
+++ b/libavformat/rtpproto.c
@@ -61,18 +61,27 @@ int ff_rtp_set_remote_url(URLContext *h, const char *uri)
 {
     RTPContext *s = h->priv_data;
     char hostname[256];
-    int port;
+    int port, rtcp_port;
+    const char *p;
 
     char buf[1024];
     char path[1024];
 
     av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port,
                  path, sizeof(path), uri);
+    rtcp_port = port + 1;
+
+    p = strchr(uri, '?');
+    if (p) {
+        if (av_find_info_tag(buf, sizeof(buf), "rtcpport", p)) {
+            rtcp_port = strtol(buf, NULL, 10);
+        }
+    }
 
     ff_url_join(buf, sizeof(buf), "udp", NULL, hostname, port, "%s", path);
     ff_udp_set_remote_url(s->rtp_hd, buf);
 
-    ff_url_join(buf, sizeof(buf), "udp", NULL, hostname, port + 1, "%s", path);
+    ff_url_join(buf, sizeof(buf), "udp", NULL, hostname, rtcp_port, "%s", path);
     ff_udp_set_remote_url(s->rtcp_hd, buf);
     return 0;
 }