diff --git a/3rdpart/ZLToolKit b/3rdpart/ZLToolKit
index 1f87bc42..34b42499 160000
--- a/3rdpart/ZLToolKit
+++ b/3rdpart/ZLToolKit
@@ -1 +1 @@
-Subproject commit 1f87bc42900e88d5443fb63bfb82523a2ac3ea33
+Subproject commit 34b42499ce9ee055b5c7cac9a270239984d0e839
diff --git a/src/Rtp/RtpSelector.cpp b/src/Rtp/RtpSelector.cpp
index f57081d2..bc8e7924 100644
--- a/src/Rtp/RtpSelector.cpp
+++ b/src/Rtp/RtpSelector.cpp
@@ -36,8 +36,8 @@ bool RtpSelector::inputRtp(const char *data, int data_len,const struct sockaddr
         _last_rtp_time.resetTime();
         onManager();
     }
-    auto ssrc = getSSRC(data,data_len);
-    if(!ssrc){
+    uint32_t ssrc = 0;
+    if(!getSSRC(data,data_len,ssrc)){
         WarnL << "get ssrc from rtp failed:" << data_len;
         return false;
     }
@@ -48,12 +48,13 @@ bool RtpSelector::inputRtp(const char *data, int data_len,const struct sockaddr
     return false;
 }
 
-uint32_t RtpSelector::getSSRC(const char *data, int data_len) {
+bool RtpSelector::getSSRC(const char *data,int data_len, uint32_t &ssrc){
     if(data_len < 12){
-        return 0;
+        return false;
     }
     uint32_t *ssrc_ptr = (uint32_t *)(data + 8);
-    return ntohl(*ssrc_ptr);
+    ssrc = ntohl(*ssrc_ptr);
+    return true;
 }
 
 RtpProcess::Ptr RtpSelector::getProcess(uint32_t ssrc,bool makeNew) {
diff --git a/src/Rtp/RtpSelector.h b/src/Rtp/RtpSelector.h
index bbbd9665..a701a83d 100644
--- a/src/Rtp/RtpSelector.h
+++ b/src/Rtp/RtpSelector.h
@@ -42,7 +42,7 @@ public:
 
     static RtpSelector &Instance();
     bool inputRtp(const char *data,int data_len,const struct sockaddr *addr ,uint32_t *dts_out = nullptr );
-    static uint32_t getSSRC(const char *data,int data_len);
+    static bool getSSRC(const char *data,int data_len, uint32_t &ssrc);
     RtpProcess::Ptr getProcess(uint32_t ssrc,bool makeNew);
     void delProcess(uint32_t ssrc,const RtpProcess *ptr);
 private:
diff --git a/src/Rtp/RtpSession.cpp b/src/Rtp/RtpSession.cpp
index c765997f..f807a85d 100644
--- a/src/Rtp/RtpSession.cpp
+++ b/src/Rtp/RtpSession.cpp
@@ -36,7 +36,7 @@ RtpSession::RtpSession(const Socket::Ptr &sock) : TcpSession(sock) {
 }
 RtpSession::~RtpSession() {
     DebugP(this);
-    if(_ssrc){
+    if(_process){
         RtpSelector::Instance().delProcess(_ssrc,_process.get());
     }
 }
@@ -66,11 +66,13 @@ void RtpSession::onManager() {
 }
 
 void RtpSession::onRtpPacket(const char *data, uint64_t len) {
-    if(!_ssrc){
-        _ssrc = RtpSelector::getSSRC(data + 2,len - 2);
+    if (!_process) {
+        if (!RtpSelector::getSSRC(data + 2, len - 2, _ssrc)) {
+            return;
+        }
         _process = RtpSelector::Instance().getProcess(_ssrc, true);
     }
-    _process->inputRtp(data + 2,len - 2,&addr);
+    _process->inputRtp(data + 2, len - 2, &addr);
     _ticker.resetTime();
 }