使用 Qt6-mingw 编译 OpenCV 源码-Toy模板网

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版本

Qt 6.6.0 win11 x86_64

安装 CMake

网址: https://cmake.org/download/
选择对应的版本下载
将 cmake.exe 所在的 bin 目录添加到环境变量中

安装 openCV

网址: https://opencv.org/releases/
选择对应的版本下载 Source资源包
使用 Qt6-mingw 编译 OpenCV 源码,OpenCV,opencv,qt6.3,c++

解压 “opencv-4.9.0.zip”, 将其解压的 “opencv-4.9.0” 存放到指定路径 “Path” (例如在我的电脑上 “Path” 则为 “I:\opencv-4.9.0”)

在解压的文件夹下新建一个 build 目录

打开 /cmake/bin/cmake-gui.exe

在红线处入 “Path”

选择将其编译在 build 目录下

点击 configure
出现配置对话框->在“Specify the generator for this project”内选择“MinGW Makefiles”选项，
在下边的编译器类型中，选择：
“Specify native compilers”，单击“Next”->在编译器选择器选择界面，在C后面选择C编译路径(我的为D:\qt\qt6\Tools\mingw1120_64\bin\gcc.exe")，同理选择C++编译器路径，点击 Finshed, 点击 configure

待配置完成后，点击 Add Entry (若下面的列表中已经有 QT_MAKE_EXECUTABLE这一项则直接双击修改即可)

Name：处填入 QT_MAKE_EXECUTABLE
Type：选择 PATH
Value：填入 Qt 的 qmake路径 (我的为 “D:\qt\qt6\6.4.3\mingw_64\bin\qmake.exe”)
Description: 空

在下面的列表中搜索 WITH_QT WITH_OPENGL,将其勾选；搜索 WITH_IPP，将其取消勾选

设置 Qt5Concurrent_DIR, Qt5Core_DIR, Qt5Gui_DIR, Qt5Test_DIR,
Qt5Widgets_DIR, Qt5OpenGL_DIR, CMAKE_BUILD_TYPE (我的是Qt6)
$使用 min g w 编译时$ ，不要勾选 BUILD_opencv_world ，否则很可能会编译失败

点击 configure

进入 “Path”\下的 build 目录, 打开一个 CMakeDownloadLog的文本文件。(我的电脑上是 “I:\opencv-4.9.0\build\CMakeDownloadLog.txt”)
例如：
使用 Qt6-mingw 编译 OpenCV 源码,OpenCV,opencv,qt6.3,c++

#do_copy "opencv_videoio_ffmpeg.dll" "9b755ecbbade0a5b78332e9b4ef2dd1b" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/fbac408a47977ee4265f39e7659d33f1dfef5216/ffmpeg/opencv_videoio_ffmpeg.dll" "C:/openCV/3rdparty/ffmpeg"
#missing "C:/openCV/3rdparty/ffmpeg/opencv_videoio_ffmpeg.dll"
#check_md5 "H:/opencv-4.9.0/opencv-4.9.0/.cache/ffmpeg/9b755ecbbade0a5b78332e9b4ef2dd1b-opencv_videoio_ffmpeg.dll"
#mismatch_md5 "H:/opencv-4.9.0/opencv-4.9.0/.cache/ffmpeg/9b755ecbbade0a5b78332e9b4ef2dd1b-opencv_videoio_ffmpeg.dll" "d41d8cd98f00b204e9800998ecf8427e"
#delete "H:/opencv-4.9.0/opencv-4.9.0/.cache/ffmpeg/9b755ecbbade0a5b78332e9b4ef2dd1b-opencv_videoio_ffmpeg.dll"
#cmake_download "H:/opencv-4.9.0/opencv-4.9.0/.cache/ffmpeg/9b755ecbbade0a5b78332e9b4ef2dd1b-opencv_videoio_ffmpeg.dll" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/fbac408a47977ee4265f39e7659d33f1dfef5216/ffmpeg/opencv_videoio_ffmpeg.dll"
#try 1
# timeout on name lookup is not supported
# getaddrinfo(3) failed for raw.githubusercontent.com:443
# Could not resolve host: raw.githubusercontent.com
# Closing connection 0
#

里面提示编译时因网络下载，缺失部分文件

"https://raw.githubusercontent.com/opencv/opencv_3rdparty/fbac408a47977ee4265f39e7659d33f1dfef5216/ffmpeg/opencv_videoio_ffmpeg.dll" "C:/openCV/3rdparty/ffmpeg"
第一行带有 raw 的网址则是我们需要下载的文件，将其复制并在浏览器中打开

#missing 这一行表明了缺失文件应该存储的地方，将下载的文件复制粘贴到这即可

点击generate

build 目录下，打开终端，执行 mingw32-make，便开始编译

编译无错后，在终端中输入 mingw32-make.exe install 会打包编译后的文件,执行完成后, build 目录下会有一个生成一个 install 目录,包含了编译好的 OpenCV

添加环境变量
将 install 目录的 x64架构的 mingw 版本下的 bin 和 lib 添加到环境变量中

Qt6 下使用 OpenCV

创建 CMake 构建的 Qt6 项目
添加如下语句
所跟的路径如下，请根据自己电脑设定
set(OpenCV_DIR "I:/opencv-4.9.0/build/install/x64/mingw/lib")

find_package(OpenCV REQUIRED)

include_directories(${OpenCV_INCLUDE_DIRS})

target_link_libraries(${PROJECT_NAME} PRIVATE ${OpenCV_LIBS}) {PROJECT_NAME} 是项目的名字
例如 project(untitled VERSION 0.1 LANGUAGES CXX) 这里的 {PROJECT_NAME} 就是 untitled

也可根据 CMake Modules 添加的 opencv模块下的 OpenCVConfig.cmke 对主目录的 CMakeLists.txt 更该
使用 Qt6-mingw 编译 OpenCV 源码,OpenCV,opencv,qt6.3,c++

效果展示

使用 Qt6-mingw 编译 OpenCV 源码,OpenCV,opencv,qt6.3,c++

我的主目录 CMakeLists.txt

cmake_minimum_required(VERSION 3.5)

project(untitled VERSION 0.1 LANGUAGES CXX)

set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

set(CMAKE_MODULE_PATH "I:/opencv-4.9.0/build/install/x64/mingw/bin")
set(OpenCV_DIR "I:/opencv-4.9.0/build/install/x64/mingw/lib")
set(CMAKE_PREFIX_PATH "D:/qt/qt6/6.4.3/mingw_64/lib/cmake")

include_directories(${OpenCV_INCLUDE_DIRS})

find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets)
find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets)
find_package(OpenCV REQUIRED)

set(PROJECT_SOURCES
        main.cpp
        mainwindow.cpp
        mainwindow.h
        mainwindow.ui
)

if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
    qt_add_executable(untitled
        MANUAL_FINALIZATION
        ${PROJECT_SOURCES}
    )
# Define target properties for Android with Qt 6 as:
#    set_property(TARGET untitled APPEND PROPERTY QT_ANDROID_PACKAGE_SOURCE_DIR
#                 ${CMAKE_CURRENT_SOURCE_DIR}/android)
# For more information, see https://doc.qt.io/qt-6/qt-add-executable.html#target-creation
else()
    if(ANDROID)
        add_library(untitled SHARED
            ${PROJECT_SOURCES}
        )
# Define properties for Android with Qt 5 after find_package() calls as:
#    set(ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android")
    else()
        add_executable(untitled
            ${PROJECT_SOURCES}
        )
    endif()
endif()

target_link_libraries(untitled PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)
target_link_libraries(untitled PRIVATE ${OpenCV_LIBS})

# Qt for iOS sets MACOSX_BUNDLE_GUI_IDENTIFIER automatically since Qt 6.1.
# If you are developing for iOS or macOS you should consider setting an
# explicit, fixed bundle identifier manually though.
if(${QT_VERSION} VERSION_LESS 6.1.0)
  set(BUNDLE_ID_OPTION MACOSX_BUNDLE_GUI_IDENTIFIER com.example.untitled)
endif()
set_target_properties(untitled PROPERTIES
    ${BUNDLE_ID_OPTION}
    MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
    MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
    MACOSX_BUNDLE TRUE
    WIN32_EXECUTABLE TRUE
)
include(GNUInstallDirs)
install(TARGETS untitled
    BUNDLE DESTINATION .
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
)
if(QT_VERSION_MAJOR EQUAL 6)
    qt_finalize_executable(untitled)
endif()

注意事项

使用MSVC编译时可以选择 BUILD_opencv_world 选项，但是使用 mingw64 编译时，选择 BUILD_opencv_world 总会失败，因此在使用mingw64的时候取消该选项。文章来源地址https://www.toymoban.com/news/detail-820573.html