diff --git a/modules/ANSCV/ANSFLV.cpp b/modules/ANSCV/ANSFLV.cpp
index 1079e80..af8bab0 100644
--- a/modules/ANSCV/ANSFLV.cpp
+++ b/modules/ANSCV/ANSFLV.cpp
@@ -62,8 +62,11 @@ namespace ANSCENTER {
             }
             clientToClose = std::move(_playerClient);
         }
+        // reset() runs the destructor which calls close() exactly once.
+        // Do NOT call close() explicitly before reset() — second close would
+        // re-enter decoder Stop/flush on already-torn-down state.
         if (clientToClose) {
-            clientToClose->close();
+            clientToClose.reset();
         }
     }
     static void VerifyGlobalANSFLVLicense(const std::string& licenseKey) {
@@ -144,7 +147,8 @@ namespace ANSCENTER {
             std::lock_guard<std::recursive_mutex> lock(_mutex);
             _isPlaying = false;
         }
-        _playerClient->close();
+        // CHttpFlvPlayer::open() calls close() internally at the top —
+        // no need to close explicitly (would be a double-close).
         std::lock_guard<std::recursive_mutex> lock(_mutex);
         Setup();
         _isPlaying = _playerClient->play();
diff --git a/modules/ANSCV/ANSMJPEG.cpp b/modules/ANSCV/ANSMJPEG.cpp
index cee454e..191179a 100644
--- a/modules/ANSCV/ANSMJPEG.cpp
+++ b/modules/ANSCV/ANSMJPEG.cpp
@@ -59,8 +59,11 @@ namespace ANSCENTER {
             }
             clientToClose = std::move(_playerClient);
         }
+        // reset() runs the destructor which calls close() exactly once.
+        // Do NOT call close() explicitly before reset() — second close would
+        // re-enter decoder Stop/flush on already-torn-down state.
         if (clientToClose) {
-            clientToClose->close();
+            clientToClose.reset();
         }
     }
     static void VerifyGlobalANSMJPEGLicense(const std::string& licenseKey) {
@@ -141,7 +144,8 @@ namespace ANSCENTER {
             std::lock_guard<std::recursive_mutex> lock(_mutex);
             _isPlaying = false;
         }
-        _playerClient->close();
+        // CHttpMjpegPlayer::open() calls close() internally at the top —
+        // no need to close explicitly (would be a double-close).
         std::lock_guard<std::recursive_mutex> lock(_mutex);
         Setup();
         _isPlaying = _playerClient->play();
diff --git a/modules/ANSCV/ANSRTMP.cpp b/modules/ANSCV/ANSRTMP.cpp
index b88f655..a679bca 100644
--- a/modules/ANSCV/ANSRTMP.cpp
+++ b/modules/ANSCV/ANSRTMP.cpp
@@ -61,8 +61,11 @@ namespace ANSCENTER {
             }
             clientToClose = std::move(_playerClient);
         }
+        // reset() runs the destructor which calls close() exactly once.
+        // Do NOT call close() explicitly before reset() — second close would
+        // re-enter decoder Stop/flush on already-torn-down state.
         if (clientToClose) {
-            clientToClose->close();
+            clientToClose.reset();
         }
     }
     static void VerifyGlobalANSRTMPLicense(const std::string& licenseKey) {
@@ -138,7 +141,8 @@ namespace ANSCENTER {
             std::lock_guard<std::recursive_mutex> lock(_mutex);
             _isPlaying = false;
         }
-        _playerClient->close();
+        // CRtmpPlayer::open() calls close() internally at the top —
+        // no need to close explicitly (would be a double-close).
         std::lock_guard<std::recursive_mutex> lock(_mutex);
         Setup();
         _isPlaying = _playerClient->play();
diff --git a/modules/ANSCV/ANSRTSP.cpp b/modules/ANSCV/ANSRTSP.cpp
index b793a16..cccdb0f 100644
--- a/modules/ANSCV/ANSRTSP.cpp
+++ b/modules/ANSCV/ANSRTSP.cpp
@@ -128,8 +128,11 @@ namespace ANSCENTER {
         // close() destroys the NVDEC decoder ONLY.  Pool slot buffers
         // (regular cudaMallocPitch allocations) are untouched — they
         // belong to the global GpuNV12SlotPool, not the decoder.
+        // reset() runs ~CRtspPlayer which calls close() exactly once —
+        // do NOT call close() explicitly here (the destructor would call
+        // it again, which re-enters torn-down decoder state).
         if (clientToClose) {
-            clientToClose->close();
+            clientToClose.reset();
 
             // Force CUDA runtime to release all cached memory from the destroyed
             // NVDEC decoder.  Without this, cuMemFree returns memory to the CUDA
diff --git a/modules/ANSCV/ANSSRT.cpp b/modules/ANSCV/ANSSRT.cpp
index 01621d3..af04c0f 100644
--- a/modules/ANSCV/ANSSRT.cpp
+++ b/modules/ANSCV/ANSSRT.cpp
@@ -61,8 +61,11 @@ namespace ANSCENTER {
             }
             clientToClose = std::move(_playerClient);
         }
+        // reset() runs the destructor which calls close() exactly once.
+        // Do NOT call close() explicitly before reset() — second close would
+        // re-enter decoder Stop/flush on already-torn-down state.
         if (clientToClose) {
-            clientToClose->close();
+            clientToClose.reset();
         }
     }
     static void VerifyGlobalANSSRTLicense(const std::string& licenseKey) {
@@ -136,7 +139,8 @@ namespace ANSCENTER {
             std::lock_guard<std::recursive_mutex> lock(_mutex);
             _isPlaying = false;
         }
-        _playerClient->close();
+        // CSrtPlayer::open() calls close() internally at the top —
+        // no need to close explicitly (would be a double-close).
         std::lock_guard<std::recursive_mutex> lock(_mutex);
         Setup();
         _isPlaying = _playerClient->play();
diff --git a/tests/ANSCV-UnitTest/ANSCV-UnitTest.cpp b/tests/ANSCV-UnitTest/ANSCV-UnitTest.cpp
index 7afdff7..da22b30 100644
--- a/tests/ANSCV-UnitTest/ANSCV-UnitTest.cpp
+++ b/tests/ANSCV-UnitTest/ANSCV-UnitTest.cpp
@@ -849,11 +849,11 @@ int RSTPTestCVClient() {
     while (true) {
         index++;
         std::cout << "Index=" << index << std::endl;
-        //if ((index == 200) || (index == 800) || (index == 1200)) { StopRTSP(&rtspClient); }
-        //if ((index == 400) || (index == 1000) || (index == 1500)) { StartRTSP(&rtspClient);  }
+        if ((index == 200) || (index == 800) || (index == 1200)) { StopRTSP(&rtspClient); }
+        if ((index == 400) || (index == 1000) || (index == 1500)) { StartRTSP(&rtspClient);  }
         //if ((index == 1800) || (index == 2200) || (index == 2500)) { StartRTSP(&rtspClient); }
         //if ((index == 2000) || (index == 2300) || (index == 2700)) { StartRTSP(&rtspClient); }
-        //if (index > 20000) break;
+        if (index > 20000) break;
         auto start = std::chrono::system_clock::now();
         cv::Mat* image = nullptr;  // ✅ Use a pointer to hold the allocated image
         GetRTSPCVImage(&rtspClient, width, height, pts,&image);
@@ -1645,7 +1645,7 @@ int main()
     // so this works without the unit test having to link FFmpeg itself.
     //ANSCV_PrintFFmpegLicense_S();
     //FilePlayerClientDoubleDestroy();
-    FilePlayerClientCVTest();
+    //FilePlayerClientCVTest();
     //VideoPlayerClientTest();
     //VideoPlayerClientDoubleDestroy();
    // VideoPlayerClientTest();
@@ -1655,7 +1655,7 @@ int main()
   // TestGetImage();
    //PureOpenCV();
   //  RSTPTestClient();
-   //RSTPTestCVClient();
+   RSTPTestCVClient();
    //TestCreateImageFromJpegStringFile();
    //TestCreateImageFromFile();
    //for (int i = 0; i < 100; i++) {