diff --git a/trunk/src/app/srs_app_http_api.cpp b/trunk/src/app/srs_app_http_api.cpp
index 41c752dde..10f932f1c 100644
--- a/trunk/src/app/srs_app_http_api.cpp
+++ b/trunk/src/app/srs_app_http_api.cpp
@@ -530,9 +530,7 @@ int SrsApiVhosts::do_process_request(SrsStSocket* skt, SrsHttpMessage* req)
     ss << __SRS_JOBJECT_START
         << __SRS_JFIELD_ERROR(ret) << __SRS_JFIELD_CONT
         << __SRS_JFIELD_ORG("server", stat->server_id()) << __SRS_JFIELD_CONT
-        << __SRS_JFIELD_ORG("vhosts", __SRS_JARRAY_START)
-            << data.str()
-        << __SRS_JARRAY_END
+        << __SRS_JFIELD_ORG("vhosts", data.str())
         << __SRS_JOBJECT_END;
     
     return res_json(skt, req, ss.str());
@@ -562,9 +560,7 @@ int SrsApiStreams::do_process_request(SrsStSocket* skt, SrsHttpMessage* req)
     ss << __SRS_JOBJECT_START
         << __SRS_JFIELD_ERROR(ret) << __SRS_JFIELD_CONT
         << __SRS_JFIELD_ORG("server", stat->server_id()) << __SRS_JFIELD_CONT
-        << __SRS_JFIELD_ORG("streams", __SRS_JARRAY_START)
-            << data.str()
-        << __SRS_JARRAY_END
+        << __SRS_JFIELD_ORG("streams", data.str())
         << __SRS_JOBJECT_END;
     
     return res_json(skt, req, ss.str());
diff --git a/trunk/src/app/srs_app_rtmp_conn.cpp b/trunk/src/app/srs_app_rtmp_conn.cpp
index b7bb4d815..9881e4e01 100644
--- a/trunk/src/app/srs_app_rtmp_conn.cpp
+++ b/trunk/src/app/srs_app_rtmp_conn.cpp
@@ -398,7 +398,8 @@ int SrsRtmpConn::stream_service_cycle()
     
     // update the statistic when source disconveried.
     SrsStatistic* stat = SrsStatistic::instance();
-    if ((ret = stat->on_client(_srs_context->get_id(), req)) != ERROR_SUCCESS) {
+    int client_id = _srs_context->get_id();
+    if ((ret = stat->on_client(client_id, req)) != ERROR_SUCCESS) {
         srs_error("stat client failed. ret=%d", ret);
         return ret;
     }
@@ -445,9 +446,15 @@ int SrsRtmpConn::stream_service_cycle()
                 return ret;
             }
             
+            if ((ret = stat->on_client_play_start(client_id)) != ERROR_SUCCESS) {
+                srs_error("stat client play start failed. ret=%d", ret);
+                return ret;
+            }
+
             srs_info("start to play stream %s success", req->stream.c_str());
             ret = playing(source);
             http_hooks_on_stop();
+            stat->on_client_play_stop(client_id);
             
             return ret;
         }
diff --git a/trunk/src/app/srs_app_statistic.cpp b/trunk/src/app/srs_app_statistic.cpp
index 45e0019c7..f03b78fbc 100644
--- a/trunk/src/app/srs_app_statistic.cpp
+++ b/trunk/src/app/srs_app_statistic.cpp
@@ -50,6 +50,7 @@ SrsStatisticStream::SrsStatisticStream()
 {
     id = __srs_generate_id();
     vhost = NULL;
+    clients = 0;
 }
 
 SrsStatisticStream::~SrsStatisticStream()
@@ -121,10 +122,46 @@ int SrsStatistic::on_client(int id, SrsRequest* req)
     } else {
         stream = streams[url];
     }
+
+    // create client if not exists
+    SrsStatisticClient* client = NULL;
+    if (clients.find(id) == clients.end()) {
+        client = new SrsStatisticClient();
+        client->stream = stream;
+        clients[id] = client;
+    } else {
+        client = clients[id];
+    }
     
     return ret;
 }
 
+int SrsStatistic::on_client_play_start(int id)
+{
+    int ret = ERROR_SUCCESS;
+
+    std::map<int, SrsStatisticClient*>::iterator it;
+    it = clients.find(id);
+    if (it != clients.end()) {
+        it->second->stream->clients++;
+    }
+
+    return ret;
+}
+
+int SrsStatistic::on_client_play_stop(int id)
+{
+    int ret = ERROR_SUCCESS;
+
+    std::map<int, SrsStatisticClient*>::iterator it;
+    it = clients.find(id);
+    if (it != clients.end()) {
+        it->second->stream->clients--;
+    }
+
+    return ret;
+}
+
 int64_t SrsStatistic::server_id()
 {
     return _server_id;
@@ -134,15 +171,24 @@ int SrsStatistic::dumps_vhosts(stringstream& ss)
 {
     int ret = ERROR_SUCCESS;
 
+    ss << __SRS_JARRAY_START;
+    bool first = true;
     std::map<std::string, SrsStatisticVhost*>::iterator it;
     for (it = vhosts.begin(); it != vhosts.end(); it++) {
         SrsStatisticVhost* vhost = it->second;
+        if (first) {
+            first = false;
+        } else {
+            ss << __SRS_JFIELD_CONT;
+        }
+
         ss << __SRS_JOBJECT_START
                 << __SRS_JFIELD_ORG("id", vhost->id) << __SRS_JFIELD_CONT
                 << __SRS_JFIELD_STR("name", vhost->vhost)
             << __SRS_JOBJECT_END;
     }
-    
+    ss << __SRS_JARRAY_END;
+
     return ret;
 }
 
@@ -150,15 +196,25 @@ int SrsStatistic::dumps_streams(stringstream& ss)
 {
     int ret = ERROR_SUCCESS;
     
+    ss << __SRS_JARRAY_START;
+    bool first = true;
     std::map<std::string, SrsStatisticStream*>::iterator it;
     for (it = streams.begin(); it != streams.end(); it++) {
         SrsStatisticStream* stream = it->second;
+        if (first) {
+            first = false;
+        } else {
+            ss << __SRS_JFIELD_CONT;
+        }
+
         ss << __SRS_JOBJECT_START
                 << __SRS_JFIELD_ORG("id", stream->id) << __SRS_JFIELD_CONT
                 << __SRS_JFIELD_STR("name", stream->stream) << __SRS_JFIELD_CONT
-                << __SRS_JFIELD_ORG("vhost", stream->vhost->id)
+                << __SRS_JFIELD_ORG("vhost", stream->vhost->id) << __SRS_JFIELD_CONT
+                << __SRS_JFIELD_ORG("clients", stream->clients)
             << __SRS_JOBJECT_END;
     }
+    ss << __SRS_JARRAY_END;
     
     return ret;
 }
diff --git a/trunk/src/app/srs_app_statistic.hpp b/trunk/src/app/srs_app_statistic.hpp
index f261962ea..452254bde 100644
--- a/trunk/src/app/srs_app_statistic.hpp
+++ b/trunk/src/app/srs_app_statistic.hpp
@@ -53,6 +53,7 @@ public:
     std::string app;
     std::string stream;
     std::string url;
+    int64_t clients;
 public:
     SrsStatisticStream();
     virtual ~SrsStatisticStream();
@@ -89,6 +90,14 @@ public:
     * @param req, the client request object.
     */
     virtual int on_client(int id, SrsRequest* req);
+    /**
+    * client start play
+    */
+    virtual int on_client_play_start(int id);
+    /**
+    * client stop play
+    */
+    virtual int on_client_play_stop(int id);
 public:
     /**
     * get the server id, used to identify the server.