diff --git a/src/main/mainwindow.cpp b/src/main/mainwindow.cpp
index ad29714..3e6936b 100644
--- a/src/main/mainwindow.cpp
+++ b/src/main/mainwindow.cpp
@@ -14,7 +14,11 @@ MainWindow::MainWindow(int argc, char **argv, QWidget *parent) :
 
     ui->setupUi(this);
     initUis();
+    timer = new QTimer(this);
+
     connections();
+
+
 }
 
 MainWindow::~MainWindow()
@@ -155,6 +159,9 @@ void MainWindow::connections(){
         ui->stackedWidget_ros_control->setCurrentIndex(0);
     });
 
+    //label -> stream
+    connect(timer, SIGNAL(timeout()), this, SLOT(importFrame()));
+
     /*
      * 绑定速度控制按钮
      */
@@ -378,7 +385,7 @@ void MainWindow::importFrame()
 
 void MainWindow::on_Open_receive_clicked()
 {
-  capture.open(1);
+  capture.open(0);
   //capture.open("udp://@0.0.0.0:11111");
   timer->start(30);
 }