rtsp: In the muxer, show the generated with verbose log level

It is only useful for debugging, so it doesn't have to be shown every time.

Originally committed as revision 25323 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/rtsp.c

@@ -1359,7 +1359,7 @@ static int rtsp_setup_output_streams(AVFormatContext *s, const char *addr)
         av_free(sdp);
         return AVERROR_INVALIDDATA;
     }
-    av_log(s, AV_LOG_INFO, "SDP:\n%s\n", sdp);
+    av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
     ff_rtsp_send_cmd_with_content(s, "ANNOUNCE", rt->control_uri,
                                   "Content-Type: application/sdp\r\n",
                                   reply, NULL, sdp, strlen(sdp));