diff --git a/cloudphone/src/main/cpp/CasController.cpp b/cloudphone/src/main/cpp/CasController.cpp
index 87b91d2971d86d39678bc92356188c6a5306759d..d6cde26ac1acdbcaaa79f7c6dc5a07a08a596be6 100644
--- a/cloudphone/src/main/cpp/CasController.cpp
+++ b/cloudphone/src/main/cpp/CasController.cpp
@@ -88,6 +88,7 @@ CasController::CasController()
     m_frameType = FrameType::H264;
     m_rotationDegrees = 0;
     m_mtrans = nullptr;
+    m_isMTransValid = false;
 }
 
 CasController::~CasController()
@@ -113,6 +114,7 @@ CasController::~CasController()
     cmdCallBack = nullptr;
     m_orientation = 0;
     m_mtrans = nullptr;
+    m_isMTransValid = false;
 }
 
 void CasController::SetJniConf(string key, string value)
@@ -519,6 +521,7 @@ bool CasController::DestroyWorkers()
         m_mtrans->Stop();
     }
 #endif
+    m_isMTransValid = false;
 
     INFO("Succeed to destroy workers");
     return true;
@@ -781,7 +784,7 @@ int CasController::JniSendData(CasMsgType type, uint8_t *data, int length)
 {
     std::lock_guard<std::mutex> lockGuard(this->m_lock);
 #if MTRANS_ENABLED
-    if (m_mtrans != nullptr) {
+    if (m_mtrans != nullptr && m_isMTransValid) {
         if (type == VirtualCamera) {
             return length == m_mtrans->SendVideoData(data, length, "h264");
         } else if (type == VirtualMicrophone) {
@@ -1071,6 +1074,7 @@ void CasController::RecvdVideoData(uint8_t *data, int length)
         memcpy(videoData, data, length);
         m_videoPacketStream->Handle(videoData);
     }
+    m_isMTransValid = true;
 }
 
 void CasController::RecvdAudioData(uint8_t *data, int length)
diff --git a/cloudphone/src/main/cpp/CasController.h b/cloudphone/src/main/cpp/CasController.h
index 5e8beb66a58f89a13fd3d13ecabb8141456aaef9..400c0e12468392d4fb2b73a09368304ad6564b97 100644
--- a/cloudphone/src/main/cpp/CasController.h
+++ b/cloudphone/src/main/cpp/CasController.h
@@ -176,6 +176,7 @@ private:
     std::map<std::string, std::string> m_mediaConfig;
     int m_orientation = 0;
     int m_rotationDegrees = 0;
+    bool m_isMTransValid = false;
 };
 
 #endif // CLOUDAPPSDK_CASCONTROLLRT_H
\ No newline at end of file