diff --git a/trunk/research/librtmp/srs_bandwidth_check.c b/trunk/research/librtmp/srs_bandwidth_check.c
index 016fea7c0..94a02cd6b 100644
--- a/trunk/research/librtmp/srs_bandwidth_check.c
+++ b/trunk/research/librtmp/srs_bandwidth_check.c
@@ -69,6 +69,11 @@ int do_check(srs_rtmp_t rtmp)
         srs_human_trace("Retrieve server version failed, ret=%d", ret);
         return ret;
     }
+
+    if ((ret = srs_rtmp_play_stream(rtmp)) != 0) {
+        srs_human_trace("Play rtmp stream failed. ret=%d", ret);
+        return ret;
+    }
     
     if ((ret = srs_rtmp_bandwidth_check(rtmp,
         &start_time, &end_time, &play_kbps, &publish_kbps,
diff --git a/trunk/src/libs/srs_librtmp.cpp b/trunk/src/libs/srs_librtmp.cpp
index be62279c6..1b5d661c5 100644
--- a/trunk/src/libs/srs_librtmp.cpp
+++ b/trunk/src/libs/srs_librtmp.cpp
@@ -753,14 +753,14 @@ int srs_rtmp_connect_app(srs_rtmp_t rtmp)
     string tcUrl;
     switch(context->schema) {
         case srs_url_schema_normal:
-            tcUrl=srs_generate_normal_tc_url(context->ip, context->vhost, context->app, context->port);
+            tcUrl=srs_generate_normal_tc_url(context->ip, context->vhost, context->app, context->port, context->param);
             break;
         case srs_url_schema_via:
-            tcUrl=srs_generate_via_tc_url(context->ip, context->vhost, context->app, context->port);
+            tcUrl=srs_generate_via_tc_url(context->ip, context->vhost, context->app, context->port, context->param);
             break;
         case srs_url_schema_vis:
         case srs_url_schema_vis2:
-            tcUrl=srs_generate_vis_tc_url(context->ip, context->vhost, context->app, context->port);
+            tcUrl=srs_generate_vis_tc_url(context->ip, context->vhost, context->app, context->port, context->param);
             break;
         default:
             break;
diff --git a/trunk/src/protocol/srs_protocol_utility.cpp b/trunk/src/protocol/srs_protocol_utility.cpp
index 1a905a078..e7878b054 100644
--- a/trunk/src/protocol/srs_protocol_utility.cpp
+++ b/trunk/src/protocol/srs_protocol_utility.cpp
@@ -177,19 +177,19 @@ string srs_generate_tc_url(string ip, string vhost, string app, int port, string
     return tcUrl;
 }
 
-string srs_generate_normal_tc_url(string ip, string vhost, string app, int port)
+string srs_generate_normal_tc_url(string ip, string vhost, string app, int port, string param)
 {
-    return "rtmp://" + vhost + ":" + srs_int2str(port) + "/" + app;
+    return "rtmp://" + vhost + ":" + srs_int2str(port) + "/" + app + (param.empty() ? "" : "?" + param);
 }
 
-string srs_generate_via_tc_url(string ip, string vhost, string app, int port)
+string srs_generate_via_tc_url(string ip, string vhost, string app, int port, string param)
 {
-    return "rtmp://" + ip + ":" + srs_int2str(port) + "/" + vhost + "/" + app;
+    return "rtmp://" + ip + ":" + srs_int2str(port) + "/" + vhost + "/" + app + (param.empty() ? "" : "?" + param);
 }
 
-string srs_generate_vis_tc_url(string ip, string vhost, string app, int port)
+string srs_generate_vis_tc_url(string ip, string vhost, string app, int port, string param)
 {
-    return "rtmp://" + ip + ":" + srs_int2str(port) + "/" + app;
+    return "rtmp://" + ip + ":" + srs_int2str(port) + "/" + app + (param.empty() ? "" : "?" + param);
 }
 
 template<typename T>
diff --git a/trunk/src/protocol/srs_protocol_utility.hpp b/trunk/src/protocol/srs_protocol_utility.hpp
index 912da9e64..68816b4e1 100644
--- a/trunk/src/protocol/srs_protocol_utility.hpp
+++ b/trunk/src/protocol/srs_protocol_utility.hpp
@@ -89,19 +89,19 @@ extern std::string srs_generate_tc_url(
  * srs_detect_tools generate the normal tcUrl
  */
 extern std::string srs_generate_normal_tc_url(
-    std::string ip, std::string vhost, std::string app, int port);
+    std::string ip, std::string vhost, std::string app, int port, std::string param);
 
 /**
  * srs_detect_tools generate the normal tcUrl
  */
 extern std::string srs_generate_via_tc_url(
-    std::string ip, std::string vhost, std::string app, int port);
+    std::string ip, std::string vhost, std::string app, int port, std::string param);
 
 /**
  * srs_detect_tools generate the vis/vis2 tcUrl
  */
 extern std::string srs_generate_vis_tc_url(
-    std::string ip, std::string vhost, std::string app, int port);
+    std::string ip, std::string vhost, std::string app, int port, std::string param);
 
 /**
 * create shared ptr message from bytes.