How to install module "QtMultimedia" on Windows

qcoderpro

When I run a QML project on my Windows machine, I get the errors below on Qt Creator:
qrc:/main.qml:4:1: module "QtMultimedia" is not installed
qrc:/main.qml:5:1: module "QtQuick.Dialogs" is not installed

How to install those two modules? I look them up on the web but couldn't find a handy resource on how to that.

jsulm

@qcoderpro said in How to install module "QtMultimedia" on Windows:

How to install those two modules?

How did you install Qt and which version?

qcoderpro

@jsulm

Qt 5.12.2 and using the online installer.

jsulm

@qcoderpro Can you show how you're importing these modules?

qcoderpro

@jsulm

import QtQuick 2.12
import QtQuick.Window 2.12
import QtQuick.Controls 2.5
import QtMultimedia 5.15
import QtQuick.Dialogs 1.5
import QtQuick.LocalStorage 2.12

Lines 4 and 5 have read lines beneath them.

jsulm

@qcoderpro said in How to install module "QtMultimedia" on Windows:

import QtMultimedia 5.15

I think it should be 5.12 as you're using Qt 5.12 not 5.15

qcoderpro

@jsulm
Still exists

SGaist

Hi,

Did you add QT += multimedia to your .pro file ?

qcoderpro

@SGaist

I get the error below after adding that line in the .pro file:
:-1: error: Project ERROR: Unknown module(s) in QT: multimedia

And this is the .pro file contents:

QT += quick
CONFIG += c++11
QT += multimedia

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Refer to the documentation for the
# deprecated API to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
        main.cpp

RESOURCES += qml.qrc

# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =

# Additional import path used to resolve QML modules just for Qt Quick Designer
QML_DESIGNER_IMPORT_PATH =

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

DISTFILES += \
    android/AndroidManifest.xml \
    android/build.gradle \
    android/gradle/wrapper/gradle-wrapper.jar \
    android/gradle/wrapper/gradle-wrapper.properties \
    android/gradlew \
    android/gradlew.bat \
    android/res/values/libs.xml

contains(ANDROID_TARGET_ARCH,armeabi-v7a) {
    ANDROID_PACKAGE_SOURCE_DIR = \
        $$PWD/android
}

SGaist

Did you re-run qmake after adding that line ?

qcoderpro

@SGaist

Yes, I did it but no change in the outcome! :(

I thought of making a new project with the same title and files this time using the CMake build system.

I've not used CMake yet. Should I add the QT += multimedia line in the CMakeLists.txt file and retest the project after re-running CMake?

eyllanesc

@qcoderpro Are you sure you are using Qt5? I suspect you are using Qt6

jsulm

@qcoderpro Do you have more than one Kit? If so do you use the one where Qt has multimedia module?

qcoderpro

I've configurated only the Desktop kit as follows. Also, the Help menu says I'm using 5.15 while the kit is 6! I don't know which one is more correct! :|

eyllanesc

@qcoderpro As I suspected, you are confusing the version with which QtCreator was compiled (5.15.2) with the Qt you have installed (Qt 6.0.0). If you analyze the second image you will see that "C:/Qt/6.0.0/mingw81_64/lib/..." says where it is concluded that you are using Qt 6.0.0. Solution: Download Qt5 and remove Qt6 so you don't have that kind of problem

qcoderpro

@eyllanesc

the version with which QtCreator was compiled (5.15.2) with the Qt you have installed (Qt 6.0.0).

Can't we have Qt 6 for both the compiled and installed versions to get rid of this problem and also have the most up-to-date Qt version?

Download Qt5 and remove Qt6 so you don't have that kind of problem

You mean to unselect Qt 6.0.0 and select Qt 5.15.2?
So what are those Qt 6.0.0 and Qt 6.0.1 for?

eyllanesc

@qcoderpro I recommend you select 5.15.2 and deselect Qt 6.0.0.

Qt 6.x.y is a new version (with many internal changes) but so far the multimedia module has not been added. See this https://stackoverflow.com/questions/65213872/qt6-and-multimedia-module.

jsulm

@qcoderpro said in How to install module "QtMultimedia" on Windows:

Help menu says I'm using 5.15 while the kit is 6!

No, it says what Qt version was used to build QtCreator, not what Qt you're using.

qcoderpro

@eyllanesc
Thanks.

@jsulm

No, it says what Qt version was used to build QtCreator, not what Qt you're using.

So is the proper way to see the Qt version installed to look at the version of the kits' Qt, please?

jsulm

@qcoderpro said in How to install module "QtMultimedia" on Windows:

So is the proper way to see the Qt version installed to look at the version of the kits' Qt, please?

Yes