diff --git a/trunk/src/app/srs_app_listener.cpp b/trunk/src/app/srs_app_listener.cpp
index d55ca775e..cd847fa36 100755
--- a/trunk/src/app/srs_app_listener.cpp
+++ b/trunk/src/app/srs_app_listener.cpp
@@ -542,10 +542,11 @@ srs_error_t SrsUdpMuxListener::cycle()
         }
         // Use pithy print to show more smart information.
         if (err != srs_success) {
-            if (pp_pkt_handler_err->can_print(err)) {
+            uint32_t nn = 0;
+            if (pp_pkt_handler_err->can_print(err, &nn)) {
                 // Append more information.
                 err = srs_error_wrap(err, "size=%u, data=[%s]", skt.size(), srs_string_dumps_hex(skt.data(), skt.size(), 8).c_str());
-                srs_warn("handle udp pkt, count=%u, err: %s", pp_pkt_handler_err->nn_count, srs_error_desc(err).c_str());
+                srs_warn("handle udp pkt, count=%u/%u, err: %s", pp_pkt_handler_err->nn_count, nn, srs_error_desc(err).c_str());
             }
             srs_freep(err);
         }
diff --git a/trunk/src/app/srs_app_pithy_print.cpp b/trunk/src/app/srs_app_pithy_print.cpp
index 3f5ca5fc8..3b53891b9 100644
--- a/trunk/src/app/srs_app_pithy_print.cpp
+++ b/trunk/src/app/srs_app_pithy_print.cpp
@@ -36,6 +36,7 @@ SrsStageInfo::SrsStageInfo(int _stage_id)
     stage_id = _stage_id;
     nb_clients = 0;
     age = 0;
+    nn_count = 0;
     
     update_print_time();
     
@@ -123,19 +124,25 @@ SrsErrorPithyPrint::~SrsErrorPithyPrint()
 {
 }
 
-bool SrsErrorPithyPrint::can_print(srs_error_t err)
+bool SrsErrorPithyPrint::can_print(srs_error_t err, uint32_t* pnn)
 {
     int error_code = srs_error_code(err);
-    return can_print(error_code);
+    return can_print(error_code, pnn);
 }
 
-bool SrsErrorPithyPrint::can_print(int error_code)
+bool SrsErrorPithyPrint::can_print(int error_code, uint32_t* pnn)
 {
-    nn_count++;
-
     bool new_stage = false;
     SrsStageInfo* stage = stages.fetch_or_create(error_code, &new_stage);
 
+    // Increase the count.
+    stage->nn_count++;
+    nn_count++;
+
+    if (pnn) {
+        *pnn = stage->nn_count;
+    }
+
     // Always and only one client.
     if (new_stage) {
         stage->nb_clients = 1;
diff --git a/trunk/src/app/srs_app_pithy_print.hpp b/trunk/src/app/srs_app_pithy_print.hpp
index 970810340..c88478c0b 100644
--- a/trunk/src/app/srs_app_pithy_print.hpp
+++ b/trunk/src/app/srs_app_pithy_print.hpp
@@ -37,6 +37,8 @@ public:
     int stage_id;
     srs_utime_t interval;
     int nb_clients;
+    // The number of call of can_print().
+    uint32_t nn_count;
 public:
     srs_utime_t age;
 public:
@@ -79,9 +81,9 @@ public:
     virtual ~SrsErrorPithyPrint();
 public:
     // Whether specified stage is ready for print.
-    bool can_print(srs_error_t err);
+    bool can_print(srs_error_t err, uint32_t* pnn = NULL);
     // We also support int error code.
-    bool can_print(int err);
+    bool can_print(int err, uint32_t* pnn = NULL);
 };
 
 // The stage is used for a collection of object to do print,
diff --git a/trunk/src/app/srs_app_rtc_conn.cpp b/trunk/src/app/srs_app_rtc_conn.cpp
index cdca35c41..4c8776b8e 100644
--- a/trunk/src/app/srs_app_rtc_conn.cpp
+++ b/trunk/src/app/srs_app_rtc_conn.cpp
@@ -501,8 +501,9 @@ srs_error_t SrsRtcPlayStream::cycle()
         // Send-out all RTP packets and do cleanup
         if (true) {
             if ((err = send_packets(source, pkts, info)) != srs_success) {
-                if (epp->can_print(err)) {
-                    srs_warn("play send packets=%u, nn=%u, err: %s", pkts.size(), epp->nn_count, srs_error_desc(err).c_str());
+                uint32_t nn = 0;
+                if (epp->can_print(err, &nn)) {
+                    srs_warn("play send packets=%u, nn=%u/%u, err: %s", pkts.size(), epp->nn_count, nn, srs_error_desc(err).c_str());
                 }
                 srs_freep(err);
             }
@@ -1986,9 +1987,12 @@ void SrsRtcConnection::update_sendonly_socket(SrsUdpMuxSocket* skt)
     // Show address change log.
     if (prev_peer_id.empty()) {
         srs_trace("RTC: session address init %s", peer_id.c_str());
-    } else if (pp_address_change->can_print(skt->get_peer_port())) {
-        srs_trace("RTC: session address change %s -> %s, cached=%d, nn_change=%u, nn_address=%u", prev_peer_id.c_str(),
-            peer_id.c_str(), (addr_cache? 1:0), pp_address_change->nn_count, peer_addresses_.size());
+    } else {
+        uint32_t nn = 0;
+        if (pp_address_change->can_print(skt->get_peer_port(), &nn)) {
+            srs_trace("RTC: session address change %s -> %s, cached=%d, nn_change=%u/%u, nn_address=%u", prev_peer_id.c_str(),
+                peer_id.c_str(), (addr_cache? 1:0), pp_address_change->nn_count, nn, peer_addresses_.size());
+        }
     }
 
     // If no cache, build cache and setup the relations in connection.