diff --git a/util/RTCContext.cpp b/util/RTCContext.cpp
index 452c2b9..8ad2b19 100644
--- a/util/RTCContext.cpp
+++ b/util/RTCContext.cpp
@@ -42,7 +42,9 @@ void RTCContext::onAudioProcess(const char* roomId, const char* peerId,
     namespace py = boost::python;
     std::cout << "-----------------------------------" << std::endl;
     std::cout << "dataCount:" << audioFrame.dataCount << audioSourceType << std::endl;
-    if (!py_callback_.is_none()) {
+    if (audioFrame.data == nullptr) {
+        std::cout << "sudioFrame data is null" << std::endl;
+    } else if (!py_callback_.is_none()) {
         std::cout << "python callback" << std::endl;
         npy_intp dims[1] = {audioFrame.dataCount};
         std::cout << "step1" << std::endl;