decode an RTP/H264 elementary stream without using SDP

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>
(cherry picked from commit 39349f5c16dbf4d7dc7e474e7b596bd34c380730)

modules/access/rtp/rtp.c

@@ -435,7 +435,6 @@ static void codec_decode (demux_t *demux, void *data, block_t *block)
         block_Release (block);
 }
 
-
 static void *stream_init (demux_t *demux, const char *name)
 {
     return stream_DemuxNew (demux, name, demux->out);
@@ -458,6 +457,11 @@ static void stream_decode (demux_t *demux, void *data, block_t *block)
     (void)demux;
 }
 
+static void *demux_init (demux_t *demux)
+{
+    return stream_init (demux, demux->psz_demux);
+}
+
 /*
  * Static payload types handler
  */
@@ -683,7 +687,22 @@ int rtp_autodetect (demux_t *demux, rtp_session_t *session,
         break;
 
       default:
-        return -1;
+        /*
+         * If the rtp payload type is unknown then check demux if it is specified
+         */
+        if ((strcmp(demux->psz_demux, "h264") == 0) || (strcmp(demux->psz_demux, "ts") == 0))
+        {
+          msg_Dbg (demux, "rtp autodetect specified demux=%s", demux->psz_demux);
+          pt.init = demux_init;
+          pt.destroy = stream_destroy;
+          pt.decode = stream_decode;
+          pt.frequency = 90000;
+          break;
+        }
+        else
+        {
+          return -1;
+        }
     }
     rtp_add_type (demux, session, &pt);
     return 0;