User:Joger

My build setup

OS: Windows 11 with dev drive mounted on D:

Qt source tree: D:\qt\qt6\

Build directory containing all builds: D:\qt\build\

Main (host) build for dev branch: D:\qt\build\dev\

Visual Studio 2022 (MSVC)

Don't have perl in path

Developer setup for Qt Multimedia

Initializing Qt Repo for Qt 6 with necessary dependencies for QtMultimedia

This init-repository initializes the necessary Qt submodules for working with QtMultimedia. By only initializing the repository with the necessary modules, the main Qt build is faster than doing a full build.

C:\Strawberry\perl\bin\perl init-repository --module-subset=qtbase,qtquick3d,qtdeclarative,qtsvg,qtshadertools,qtmultimedia,qtrepotools -f --codereview-username johanseg

Building FFmpeg on Windows

1. Install 7-zip from provisioning: Run qt6\coin\provisioning\common\windows\install-sevenzip.ps1 as admin
   1. Needed by provisioning script for FFmpeg
2. Install msys2 from provisioning: Run qt6\coin\provisioning\common\windows\install-msys2.ps1 as admin
   1. Needed by provisioning script for FFmpeg because FFmpeg requires tools from msys to configure
3. Install FFmpeg from provisioning: Run qt6\coin\provisioning\common\windows\install-ffmpeg.ps1 as admin
   1. Since I only need MSVC build, I edit the install-ffmpeg.ps1 first, to comment out unnecessary versions
   2. This sets FFMPEG_DIR=C:\FFmpeg-n6.0\build\msvc\installed\

Configure Qt main build

I build Qt as stand-alone module to make builds run faster when working in QtMultimedia. But first, we need to build the necessary dependencies. I do this from command line with D:\qt\build\dev as current directory:

..\..\qt6\configure.bat -debug -developer-build -submodules QtMultimedia -nomake tests -nomake examples -- -DFFMPEG_DIR=C:\FFmpeg-n6.0\build\msvc\installed --fresh & ninja

Configure Qt multimedia

I configure QtMultimedia using a CMakeUserPresets.json file that is located in D:\qt\qt6\qtmultimedia instead of using a configure script. This way, I can open the D:\qt\qt6\qtmultimedia as a folder in Visual Studio and configure it from there.

The benefit of using CMakeUserPresets.json is that Visual Studio knows how to debug the tests and examples.

{
    "version": 5,
    "configurePresets": [
        {
            "name": "msvc-64",
            "hidden": true,
            "condition": {
                "type": "equals",
                "lhs": "${hostSystemName}",
                "rhs": "Windows"
            },
            "generator": "Ninja",
            "cacheVariables": {
                "CMAKE_CXX_COMPILER": "cl.exe",
                "CMAKE_C_COMPILER": "cl.exe"
            },
            "toolset": {
                "value": "v143,host=x64",
                "strategy": "external"
            },
            "architecture": {
                "value": "x64",
                "strategy": "external"
            }
        },
        {
            "name": "Debug",
            "hidden": true,
            "cacheVariables": {
                "CMAKE_BUILD_TYPE": "Debug"
            }
        },
        {
            "name": "qt6-dev-base",
            "hidden": true,
            "cacheVariables": {
                "FEATURE_developer_build": true,
                "BUILD_qttools": false,
                "BUILD_qtdoc": false,
                "BUILD_qttranslations": false,
                "QT_BUILD_EXAMPLES": false,
                "QT_BUILD_EXAMPLES_BY_DEFAULT": false,
                "QT_BUILD_EXAMPLES_AS_EXTERNAL": false,
                "QT_BUILD_TESTS": false,
                "QT_BUILD_TESTS_BY_DEFAULT": false
            },
            "environment": {
                "PATH": "D:/qt/build/dev/qtbase/bin;$penv{PATH}"
            }
        },
        {
            "name": "qt6-dev-debug",
            "hidden": true,
            "inherits": [
                "qt6-dev-base",
                "msvc-64",
                "Debug"
            ],
            "cacheVariables": {
                "CMAKE_PREFIX_PATH": "D:/qt/build/dev/qtbase/"
            },
            "environment": {
                "PATH": "D:/qt/build/dev/qtbase/bin;$penv{PATH}"
            }
        },
        {
            "name": "QtMultimedia",
            "inherits": "qt6-dev-debug",
            "binaryDir": "D:/qt/build/qtmultimedia/",
            "cacheVariables": {
                "QT_BUILD_EXAMPLES": true,
                "QT_BUILD_EXAMPLES_BY_DEFAULT": true,
                "QT_BUILD_TESTS": true,
                "QT_BUILD_TESTS_BY_DEFAULT": true,
                "QT_BUILD_EXAMPLES_AS_EXTERNAL": false,
                "QT_BUILD_MANUAL_TESTS": false,
                "QT_DEPLOY_FFMPEG": true,
                "FEATURE_ffmpeg": true,
                "FFMPEG_DIR": "C:\\ffmpeg-n6.0\\build\\msvc\\installed"
            }
        }
    ],
    "buildPresets": [
        {
            "name": "Build-Qt-Multimedia-MSVC-Debug-64",
            "displayName": "Build Qt Multimedia MSVC Debug 64",
            "configurePreset": "QtMultimedia"
        }
    ]
}

Setting up Qt Creator for Android

1. Install Qt Creator with Android option
2. In Creator preferences, install Adoptium JDK (C:\Program Files\Eclipse Adoptium\jdk-17.0.10.7-hotspot)
3. Android SDK location: C:\dev\android
4. Select Android NDK 26.1.10909125 and make default
5. Oppenssl location: C:\dev\android\android_openssl
6. Verify Android settings:

1. Add Android device for ABI x86_64, OS Version 13.0 ("Tiramisu") (SDK 33)

Building Qt for Android on Windows

Main build root Android: D:\qt\build\android

Configure Qt for Android in build root using host build

cmake -DQT_BUILD_SUBMODULES=QtMultimedia -DQT_HOST_PATH=D:/qt/build/dev/qtbase -DQT_BUILD_TESTS_BY_DEFAULT=OFF -DQT_BUILD_TESTS=ON -DANDROID_PLATFORM=android-33 -DQT_USE_TARGET_ANDROID_BUILD_DIR=TRUE -DQT_QMAKE_TARGET_MKSPEC=android-clang -DANDROID_SDK_ROOT=C:/dev/android -DANDROID_NDK_ROOT=C:/dev/android/ndk/26.1.10909125 -DANDROID_ABI=x86_64 -DQT_BUILD_EXAMPLES=FALSE -DCMAKE_BUILD_TYPE=Debug -DINPUT_developer_build=yes --fresh -G Ninja D:/qt/qt6 & ninja

Main build directory for Qt Multimedia on Android: D:\qt\build\androidmultimedia Configure Qt Multimedia for Android

cmake-DCMAKE_TOOLCHAIN_FILE=D:\qt\build\android\qtbase\lib\cmake\qt6\qt.toolchain.cmake -G Ninja  -DQT_USE_ORIGINAL_COMPILER=ON -DQT_BUILD_TESTS=ON -DQT_BUILD_TESTS_BY_DEFAULT=OFF D:/qt/qt6/qtmultimedia & ninja

Importing Qt Multimedia build into QtCreator

1. Open QtMultimedia CMakeLists.txt from D:\qt\qt6\qtmultimedia
2. Deselect all kits
3. Import build from D:\qt\build\androidmultimedia
   • This creates a Android Qt 6.8.0 (android) Clang x86_64 kit
   • Configure is run automatically again
4. Select a test to be built (tst_qmediadevices) and choose a corresponding emulator in project build settings for Android kit
5. Build target tst_qmediadevices
6. Observe error message:

19:15:12: The process "C:\Program Files\CMake\bin\cmake.exe" exited normally.

19:15:12: Starting: "D:\qt\build\dev\qtbase\bin\androiddeployqt.exe" --input D:/qt/build/androidmultimedia/tests/auto/unit/multimedia/qmediadevices/android-tst_qmediadevices-deployment-settings.json --output D:/qt/build/androidmultimedia/tests/auto/unit/multimedia/qmediadevices/android-build --android-platform android-33 --jdk "C:/Program Files/Eclipse Adoptium/jdk-17.0.10.7-hotspot" --gradle

Cannot find application binary in build dir D:/qt/build/androidmultimedia/tests/auto/unit/multimedia/qmediadevices/android-build//libs/x86_64/libtst_qmediadevices_x86_64.so.

19:15:12: The process "D:\qt\build\dev\qtbase\bin\androiddeployqt.exe" exited with code 2.

Error while building/deploying project QtMultimedia (kit: Android Qt 6.8.0 (android) Clang x86_64)

When executing step "Build Android APK"

19:15:12: Elapsed time: 01:05.