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一、下載安裝相關編譯環境軟件

1.1 Python3.8：安裝路徑:C:\Users\Administrator\AppData\Local\Programs\Python\Python38-32????安裝包：python3.8.exe
1.2 QT5.14.2：安裝路徑:C:\Qt\Qt5.14.2????
1.3 opencv4.5：解壓路徑D:\opencv\；安裝包：opencv-4.5.0-vc14_vc15.exe
1.4 cmake-3.24：安裝路徑:C:\Program Files\CMake ?安裝包：cmake-3.24.0-win32-x86.exe
1.5?Java18：安裝路徑:C:\Program Files\Java\jdk-18.0.1?安裝包：JavaSEDevelopmentKit.exe

二、打開我的電腦屬性，設置環境變量Path包含如下配置：

C:\Program Files\CMake\bin;
C:\Qt\Qt5.14.2\5.14.2\mingw73_64\bin;
C:\Qt\Qt5.14.2\Tools\mingw73_64\bin;
C:\opencv\build\x64\vc15\bin;

3、打開CMake軟件進行配置

?點擊 Configure，設置編譯器
Specify the generator for this project: MinGW Makefiles
Specify native compilers
Next
Compilers C: C:/Qt/Qt5.14.2/Tools/mingw730_64/bin/gcc.exe
Compilers C++: C:/Qt/Qt5.14.2/Tools/mingw730_64/bin/g++.exe
Finish

設置源碼位置：D:/opencv/sources

設置生成項目位置：D:/opencv/build_mingw64

點擊Configure按鈕后配置對應選項

WITH_OPENGL????勾選
WITH_QT????不勾選
OPENCV_ENABLE_ALLOCATOR_STATS????不勾選
WITH_OPENCL_D3D11_NV 不勾選
其中：OPENCV_VS_VERSIONINFO_SKIP需要點擊Add Entry按鈕手工新增,OPENCV_VS_VERSIONINFO_SKIP BOOL 1.

?4、下載ffmpeg文件到指定位置
下載網址：
https://raw.githubusercontent.com/opencv/opencv_3rdparty/6152e132572dfdaa32887eabeb7199bef49b14dc/ffmpeg/ffmpeg_version.cmake
https://raw.githubusercontent.com/opencv/opencv_3rdparty/40b4666d1aa374205fd61373496e15d92ecd5313/ffmpeg/opencv_videoio_ffmpeg.dll
https://raw.githubusercontent.com/opencv/opencv_3rdparty/40b4666d1aa374205fd61373496e15d92ecd5313/ffmpeg/opencv_videoio_ffmpeg_64.dll
存放地址：
D:\opencv\build_mingw64\3rdparty\ffmpeg\ffmpeg_version.cmake?
D:\opencv\build_mingw64\3rdparty\ffmpeg\opencv_videoio_ffmpeg.dll
D:\opencv\build_mingw64\3rdparty\ffmpeg\opencv_videoio_ffmpeg_64.dll

5、編譯項目文件：
點擊Generate按鈕后，生成項目文件完成。

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6、開始菜單中打開Qt目錄下的mingw64菜單，進入編譯窗口。

中跳轉到到指定目錄，執行下面命令：
D:\opencv\build_mingw64>mingw32-make -j 8
D:\opencv\build_mingw64>mingw32-make install

編譯到68%時候會出錯，需要運行新的mingw64窗口，執行命令
切換目錄cd D:\opencv\build_mingw64\modules\word\CMakeFiles\opencv_world.dir
執行指令：C:\Qt\Qt5.14.2\Tools\mingw730_64\bin\windres.exe D:\opencv\build_mingw64\modules\world\vs_version.rc -O coff .\vs_version.rc.obj

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日志記錄如下：
D:\opencv\build_mingw64\modules>cd world

D:\opencv\build_mingw64\modules\world>cd CMakeFiles

D:\opencv\build_mingw64\modules\world\CMakeFiles>cd opencv_world.dir

D:\opencv\build_mingw64\modules\world\CMakeFiles\opencv_world.dir>C:\Qt\Qt5.14.2\Tools\mingw730_64\bin\windres.exe .\vs_version.rc -O coff .\vs_version.rc.obj
gcc: error: .\vs_version.rc: No such file or directory
gcc: warning: '-x c' after last input file has no effect
gcc: fatal error: no input files
compilation terminated.
C:\Qt\Qt5.14.2\Tools\mingw730_64\bin\windres.exe: preprocessing failed.

D:\opencv\build_mingw64\modules\world\CMakeFiles\opencv_world.dir>C:\Qt\Qt5.14.2\Tools\mingw730_64\bin\windres.exe D:\opencv\build_mingw64\modules\world\vs_version.rc -O coff .\vs_version.rc.obj

D:\opencv\build_mingw64\modules\world\CMakeFiles\opencv_world.dir>mingw32-make.exe -j 8
mingw32-make.exe: *** No targets specified and no makefile found. ?Stop.

D:\opencv\build_mingw64\modules\world\CMakeFiles\opencv_world.dir>cd ../../../

D:\opencv\build_mingw64\modules>mingw32-make.exe -j 8
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直到正確編譯結束后，執行安裝指令：mingw32-make install

?至此完成opencv對應的mingw-64版本軟件的編譯和安裝