cmake

官网https://cmake.org/files/
环境变量D:\Program Files\CMake\bin

w64devkit

官网https://github.com/skeeto/w64devkit/tags
环境变量D:\Program Files\w64devkit\bin
minGW32-make 拷贝并重命名为make

OpenCV

在执行完后，把关于python的都给取消勾选。勾选BUILD_opencv_world，WITH_OPENGL和BUILD_EXAMPLES，不勾选WITH_IPP、WITH_MSMF和ENABLE_PRECOMPILED_HEADERS（如果有的话），CPU_DISPATCH选空。

make -j 4
make install

环境变量D:\repocpp\opencv\build\x64\mingw\bin

vscode配置和测试

打开vscode按Ctrl+Shift+p，点击“C/C++:Edit Configurations(JSON)”就可以生成.vscode文件夹

launch.json

{     // 使用 IntelliSense 了解相关属性。      // 悬停以查看现有属性的描述。     // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387     "version": "0.2.0",     "configurations": [         {             "name": "g++.exe - 生成和调试活动文件",             "type": "cppdbg",             "request": "launch",             "program": "${fileDirname}\\${fileBasenameNoExtension}.exe",             "args": [],             "stopAtEntry": false,             "cwd": "${fileDirname}",             "environment": [],             "externalConsole": true,             "MIMode": "gdb",             "miDebuggerPath": "D:\\Program Files\\w64devkit\\bin\\gdb.exe",             "setupCommands": [                 {                     "description": "为 gdb 启用整齐打印",                     "text": "-enable-pretty-printing",                     "ignoreFailures": false                 }             ],             "preLaunchTask": "C/C++: g++.exe 生成活动文件"         }     ] } 

c_cpp_properties.json

{     "configurations": [         {             "name": "Win32",             "includePath": [                 "${workspaceFolder}/**",                 "D:\\repocpp\\opencv\\build\\x64\\mingw\\install\\include",                 "D:\\repocpp\\opencv\\build\\x64\\mingw\\install\\include\\opencv2"             ],             "defines": [                 "_DEBUG",                 "UNICODE",                 "_UNICODE"             ],             "cStandard": "c11",             "cppStandard": "c++17",             "intelliSenseMode": "${default}"         }     ],     "version": 4 } 

tasks.json

{     "tasks": [         {             "type": "cppbuild",             "label": "C/C++: g++.exe 生成活动文件",             "command": "D:\\Program Files\\w64devkit\\bin\\g++.exe",             "args": [                 "-fdiagnostics-color=always",                 "-g",                 "${file}",                 "-o",                 "${fileDirname}\\${fileBasenameNoExtension}.exe",                 "-I",                 "D:\\repocpp\\opencv\\build\\x64\\mingw\\install\\include",                 "-I",                 "D:\\repocpp\\opencv\\build\\x64\\mingw\\install\\include\\opencv2",                 "-L",                 "D:\\repocpp\\opencv\\build\\x64\\mingw\\install\\x64\\mingw\\lib",                 "-llibopencv_world455"             ],             "options": {                 "cwd": "${fileDirname}"             },             "problemMatcher": [                 "$gcc"             ],             "group": "build",             "detail": "调试器生成的任务。"         },     ],     "version": "2.0.0" } 

测试

拷贝opencv_videoio_ffmpeg455_64.dll，libopencv_world455.dll到项目根目录，文件所在目录D:\repocpp\opencv\build\x64\mingw\install\x64\mingw\bin

  #include  #include    using namespace cv; using namespace std;   int main() {     VideoCapture cap(0);     Mat img;       while (1)     {         cap >> img;         if (img.empty())             break;         namedWindow("img", WINDOW_NORMAL);         imshow("img", img);         if (27 == waitKey(20))             break;     }       return 0; }