diff --git a/CMakeLists.txt b/CMakeLists.txt
index da39b89..6454f1b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -87,10 +87,10 @@ add_executable(live demo/live/live.cpp)
 target_link_libraries(live tkDNN)
 
 #install
-if (CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
-    set (CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/install" 
-         CACHE PATH "default install path" FORCE)
-endif()
+#if (CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+#    set (CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/install" 
+#         CACHE PATH "default install path" FORCE)
+#endif()
 message("install dir:" ${CMAKE_INSTALL_PREFIX})
 install(DIRECTORY include/ DESTINATION include/${CMAKE_PROJECT_NAME}
 FILES_MATCHING PATTERN "*.h")
diff --git a/demo/live/live.cpp b/demo/live/live.cpp
index d08ac2e..b502081 100644
--- a/demo/live/live.cpp
+++ b/demo/live/live.cpp
@@ -134,16 +134,12 @@ int main(int argc, char *argv[]) {
     }
     //end parsing
 
-    //std::cout<<"open video stream on device: "<<device<<"\n";
-    //cv::VideoCapture cap(device);
-		const char* pipe = "nvcamerasrc ! video/x-raw(memory:NVMM), width=(int)640, height=(int)480, format=(string)I420, framerate=(fraction)30/1 ! nvvidconv ! video/x-raw, format=(string)I420 ! videoconvert ! video/x-raw, format=(string)BGR ! appsink";
-		/*const char* pipe = "nvcamerasrc ! "
-		"video/x-raw(memory:NVMM), width=(int)2592, height=(int)1458, format=(string)I420, framerate=(fraction)30/1 ! "
-		"nvvidconv ! video/x-raw, width=(int)1280, height=(int)720, format=(string)BGRx ! "
-		"videoconvert ! appsink";*/
-
-		cv::VideoCapture cap(pipe);
-
+    std::cout<<"open video stream on device: "<<device<<"\n";  
+    cv::VideoCapture cap(device);
+/*   
+    const char* pipe = "nvcamerasrc ! video/x-raw(memory:NVMM), width=(int)640, height=(int)480, format=(string)I420, framerate=(fraction)30/1 ! nvvidconv ! video/x-raw, format=(string)I420 ! videoconvert ! video/x-raw, format=(string)BGR ! appsink";
+    cv::VideoCapture cap(pipe);
+*/
     if(!cap.isOpened())
         FatalError("unable to open video stream");
     //cap.set(CV_CAP_PROP_BUFFERSIZE, 1); // process only last frame