Windows10+VSCode+cmake+opencv+ffmpeg+sdl2环境配置
一、概述
在Windows10上配置一个C++开发环境：
工具：VSCode
编译器：Mingw64（使用gcc进行编译）
构建工具：CMake
第三方库：集成OpenCV、FFmpeg、SDL2
二、操作步骤
1.安装mingw64并配置bin目录到环境变量
2.下载VSCode并安装
3.安装CMake并将bin目录配置到环境变量
4.下载OpenCV、FFmpeg、SDL2库备用
5.安装VSCode插件
6.Ctrl+Shift+P配置C++头文件路径，如果不配置则没有代码提示
{
"configurations": [
{
"name": "Win32",
"includePath": [
"${workspaceFolder}/**",
"D:/ffmpeg/dev/SDL2-2.28.5-dev/x86_64-w64-mingw32/include",
"D:/opencv/build_install/install/include",
"D:/ffmpeg/dev/ffmpeg-5.1.2-dev/include",
"E:/tony/demo/script/cmake_demo/cmake_opencv/src"
],
"defines": [
"_DEBUG",
"UNICODE",
"_UNICODE"
],
"compilerPath": "D:/mingw64/bin/gcc.exe",
"cStandard": "c89",
"cppStandard": "gnu++98",
"intelliSenseMode": "windows-gcc-x86"
}
],
"version": 4
}
7.创建一个CMakeLists.txt构建项目
#参考样例(Cmake保姆级教程)：https://subingwen.cn/cmake/CMake-primer/
cmake_minimum_required(VERSION 3.0.0)
#设置C++的编译版本，其中CMAKE_CXX_STANDARD是固定的，11代表C++11
set(CMAKE_CXX_STANDARD 11)
#设置项目名称
project(opencv_demo VERSION 0.1.0)
#定义一个宏在代码中使用
# add_definitions(-DDEBUG)
#include(CTest)
#enable_testing()
set(CURRENT_DIR ${CMAKE_CURRENT_SOURCE_DIR})
message("项目当前路径,也就是CMakeLists.txt所在的路径:"${CURRENT_DIR})
#设置可执行文件的输出路径,会在bin目录下输出scrcpy_demo.exe
set(EXECUTABLE_OUTPUT_PATH ${CURRENT_DIR}/bin)
#生成一个可构建的执行程序，在根目录下的build文件夹
#这里的项目名scrcpy_demo和project中的（scrcpy_demo）没有一毛钱关系
#设置源码路径
# set(SRC_LIST main.cpp)
#包含头文件（其實就是搜索頭文件）
# include_directories(${PROJECT_SOURCE_DIR}/src)
# #搜索源文件 SRC_LIST代表變量名
# file(GLOB SRC_LIST ${CMAKE_CURRENT_SOURCE_DIR}/src/*.c)
# message("搜索源码Lu经:"${SRC_LIST})
##############添加opencv相关类库的支持
#编译opencv(opencv引入始终不成功)
include_directories("D:/opencv/build_install/install/include")
link_directories("D:/opencv/build_install/install/x64/mingw/bin")
#导入sdl2
include_directories("D:/ffmpeg/dev/SDL2-2.28.5-dev/x86_64-w64-mingw32/include")
link_directories("D:/ffmpeg/dev/SDL2-2.28.5-dev/x86_64-w64-mingw32/bin")
#导入ffmpeg
include_directories("D:/ffmpeg/dev/ffmpeg-5.1.2-dev/include")
link_directories("D:/ffmpeg/dev/ffmpeg-5.1.2-dev/bin")
# file(GLOB sources ${PROJECT_SOURCE_DIR}/src/*.cpp ${PROJECT_SOURCE_DIR}/*.h)
# set(SRC_1 main.cpp)
#搜索src目录下的源文件
include_directories(${CMAKE_CURRENT_SOURCE_DIR}/src/sdl/include)
aux_source_directory(${CMAKE_CURRENT_SOURCE_DIR}/src/sdl SRC_LIST)
#生成可執行文件
add_executable(opencv_demo main.cpp ${SRC_LIST})
target_link_libraries(opencv_demo
SDL2
libopencv_calib3d453
libopencv_features2d453
libopencv_gapi453
libopencv_flann453
libopencv_core453
libopencv_dnn453
libopencv_ml453
libopencv_highgui453
libopencv_imgcodecs453
libopencv_imgproc453
#引入ffmpeg
avformat-59
avutil-57
avcodec-59
avdevice-59
avfilter-8
)
set(CPACK_PROJECT_NAME ${PROJECT_NAME})
set(CPACK_PROJECT_VERSION ${PROJECT_VERSION})
include(CPack)
#message用于输出信息
message("项目名称："${PROJECT_NAME})
message("项目版本："${PROJECT_VERSION})
message("项目源码路径"${PROJECT_SOURCE_DIR})
#[[
这是一个多行注释
]]
8.创建一个shell脚本用于执行CMakeLists.txt
#!/usr/bin/env bash #自动化运行的脚本 BUILD_DIR='build' #删除build目录 rm -rf $BUILD_DIR #重新编译 -B build代表编译文件存放目录 cmake -B build -G "MinGW Makefiles" echo $BUILD_DIR #进入build目录 cd $BUILD_DIR #执行make编译 mingw32-make #运行可执行文件 ../bin/opencv_demo.exe # ./opencv_demo.exe
9.创建一个main.cpp进行测试：ps：测试代码是在网上随便找的
1.测试OpenCV显示一个图片
2.测试SDL2创建一个原生窗口
3.测试打印ffmpeg的codec的版本号
#include <iostream>
#include <opencv2/opencv.hpp>
#include "SDL2/SDL.h"
extern "C"{
#include <libavcodec/avcodec.h>
}
#include "create_window.h"
using namespace std;
using namespace cv;
#undef main
int main(int argc, char *argv[]){
// CreateWindow *window = new CreateWindow();
// window->showWindow();
cout<< "hello world" <<endl;
cv::Mat src = cv::imread("e:/tony/demo/script/cmake_demo/cmake_opencv/horse.jpeg");
if(src.empty()){
cout << "this image is empty"<<endl;
}
// cvtColor(src,COLOR_BGR2GRAY);
cv::imshow("src",src);
cv::waitKey(0);
// cout <<"Hello SDL2"<< endl;
//创建一个SDL_VIDEO窗口
SDL_Window* window = NULL;
SDL_Renderer *renderer = NULL;//渲染器
SDL_Texture *texture = NULL;//纹理
SDL_Init(SDL_INIT_VIDEO);
window = SDL_CreateWindow("Title",
SDL_WINDOWPOS_UNDEFINED, // 默认x y 显示到窗口中间
SDL_WINDOWPOS_UNDEFINED,
640,
480,
SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);// 设置窗口属性
if(!window){
printf("不能创建window，%s",SDL_GetError());
}
//创建渲染器（一个窗口可以有多个渲染器）
renderer = SDL_CreateRenderer(window,-1,0);
if(NULL==renderer){
printf("渲染器创建失败:%s",SDL_GetError());
//销毁窗口释放资源
SDL_DestroyWindow(window);
SDL_Quit();
return -1;
}
//基于渲染器创建纹理
texture = SDL_CreateTexture(renderer,
SDL_PIXELFORMAT_RGBA8888,
SDL_TEXTUREACCESS_TARGET,
640,
480);
if(NULL==texture){
printf("纹理创建失败:%s",SDL_GetError());
//销毁窗口释放资源
SDL_DestroyWindow(window);
SDL_Quit();
return -1;
}
int showCnt = 0;//显示次数
int run = 1;//循环退出条件
SDL_Rect rect;//定义一个SDL举行
rect.w = 50;
rect.h = 50;
while(run){
//碎甲rect的位置
rect.x = rand()%600;
rect.y = rand() % 400;
// 设置渲染目标为纹理
SDL_SetRenderTarget(renderer, texture);
// 设置渲染绘制颜色
SDL_SetRenderDrawColor(renderer, 255, 0, 255, 255);
// 刷新渲染
SDL_RenderClear(renderer);
// 设置渲染绘制颜色
SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255);
// 绘制矩形
SDL_RenderDrawRect(renderer, &rect);
// 绘制填充矩形
SDL_RenderFillRect(renderer, &rect);
// 恢复渲染目标为窗口
SDL_SetRenderTarget(renderer, NULL);
SDL_RenderCopy(renderer, texture, NULL, NULL);
// 显示纹理
SDL_RenderPresent(renderer);
SDL_Delay(300);
if(showCnt++ >= 30)
run = 0;
}
SDL_Delay(5000);//延迟5000毫秒
SDL_DestroyWindow(window);//销毁窗口
SDL_Quit();//释放资源
// 引入ffmpeg并打印版本号
unsigned codecVer = avcodec_version();
cout << codecVer<<endl;
cout << "codec版本号:"<<codecVer <<endl;
return 0;
}
10.打开mingw64命令行工具，输入./run.sh执行脚本
11.执行结果会在项目根目录下的bin中输出可执行文件的.exe文件并自动运行，build目录为编译目录
12.效果图如下
