test video io

CMakeLists.txt

@@ -59,8 +59,8 @@ if(QT_VERSION_MAJOR EQUAL 6)
 endif()
 
 
-include_directories("C:/msys64/mingw64/include/opencv4")
+include_directories("C:/msys64/mingw64/include/opencv4")#改为 opencv2文件夹所在位置
 
-file(GLOB CVLIBS "C:/msys64/mingw64/lib/libopencv*.a")
+file(GLOB CVLIBS "C:/msys64/mingw64/lib/libopencv*.a")#改为 libopencv*.a所在的位置
 
 target_link_libraries(cap0 PRIVATE ${CVLIBS})

mainwindow.cpp

@@ -6,7 +6,7 @@ MainWindow::MainWindow(QWidget *parent)
     , ui(new Ui::MainWindow)
 {
     ui->setupUi(this);
-    cap = new VideoCapture(0);
+    cap = new VideoCapture();
     onCap = false;
     vt = new QTimer(this);
     //    vt->start(20);
@@ -26,6 +26,15 @@ void MainWindow::on_pushButton_clicked()
         onCap = false;
     }
     else{
+        bool isnum;
+        int z = ui->lineEdit->text().toUInt(&isnum);
+        if(isnum){
+            cap->open(z);
+
+        }
+        else{
+            cap->open(ui->lineEdit->text().toStdString());
+        }
         vt->start(20);
         onCap = true;
     }

mainwindow.ui

@@ -18,7 +18,7 @@
     <property name="geometry">
      <rect>
       <x>20</x>
-      <y>30</y>
+      <y>90</y>
       <width>80</width>
       <height>21</height>
      </rect>
@@ -40,18 +40,15 @@
      <string/>
     </property>
    </widget>
-   <widget class="QPushButton" name="pushButton_2">
+   <widget class="QLineEdit" name="lineEdit">
     <property name="geometry">
      <rect>
-      <x>20</x>
-      <y>70</y>
-      <width>80</width>
-      <height>21</height>
+      <x>10</x>
+      <y>30</y>
+      <width>113</width>
+      <height>22</height>
      </rect>
     </property>
-    <property name="text">
-     <string>save</string>
-    </property>
    </widget>
   </widget>
   <widget class="QMenuBar" name="menubar">

readme.md

@@ -0,0 +1,4 @@
+# opencv 练习工程
+
+1. 使用mingw64工具链
+2. 使用qt相关库