diff --git a/video_io/sv_video_base.cpp b/video_io/sv_video_base.cpp
index aaf716a..e98941f 100644
--- a/video_io/sv_video_base.cpp
+++ b/video_io/sv_video_base.cpp
@@ -1118,19 +1118,24 @@ void CameraBase::_run()
 }
 bool CameraBase::read(cv::Mat& image)
 {
-  bool ret = false;
+    bool ret = false;
   if (this->_type == CameraType::WEBCAM || this->_type == CameraType::G1 || this->_type == CameraType::MIPI)
   {
+    static int falseCount=0;
     std::lock_guard<std::mutex> locker(this->_frame_mutex);
-    if(this->_frame_empty.wait_for(this->_frame_mutex,std::chrono::milliseconds(2000)) == std::cv_status::no_timeout)
+    if(this->_frame_empty.wait_for(this->_frame_mutex,std::chrono::milliseconds(10)) == std::cv_status::timeout)
     {
-      this->_frame.copyTo(image);
-      ret = true;
+      falseCount ++;
+      if(falseCount >= 1000)
+      {
+        throw std::runtime_error("SpireCV (101) Camera has offline, check CAMERA!");
+      }
     }
-    else
-    {
-      throw std::runtime_error("SpireCV (101) Camera cannot OPEN, check CAMERA_ID!");
+    else{
+      falseCount = 0;
     }
+    this->_frame.copyTo(image);
+    ret = true;
   }
   return ret;