stream: Fix randomly missing streams from SDP with dynamic elements

When using dynamic elements, gst_rtsp_stream_join_bin() is called from
"pad-added" signal. In that case priv->srcpad could already have its caps,
and they'll be sent to priv->send_src[0] pad. That means that when it
connects "notify::caps" signal, that pad could already have received its
caps and the signal won't be emitted anymore.

In that case priv->caps stay to NULL and when building the SDP that stream
gets ignored. Leading to missing video or audio when playing in client side.

https://bugzilla.gnome.org/show_bug.cgi?id=772478

diff --git a/gst/rtsp-server/rtsp-stream.c b/gst/rtsp-server/rtsp-stream.c
index 9125314..9fd3e00 100644 (file)
--- a/gst/rtsp-server/rtsp-stream.c
+++ b/gst/rtsp-server/rtsp-stream.c
@@ -2759,6 +2759,7 @@ gst_rtsp_stream_join_bin (GstRTSPStream * stream, GstBin * bin,
     /* be notified of caps changes */
     priv->caps_sig = g_signal_connect (priv->send_src[0], "notify::caps",
         (GCallback) caps_notify, stream);
+    priv->caps = gst_pad_get_current_caps (priv->send_src[0]);
   }
 
   priv->joined_bin = bin;