Unknown modules in qt multimedia windows

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 o...


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  • 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.

  • @qcoderpro said in How to install module «QtMultimedia» on Windows:

    How to install those two modules?

    How did you install Qt and which version?

  • @jsulm

    Qt 5.12.2 and using the online installer.

  • @qcoderpro Can you show how you’re importing these modules?

  • @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.

  • @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

  • @jsulm
    Still exists

    Capture_3.PNG

  • Hi,

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

  • @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
}

  • Did you re-run qmake after adding that line ?

  • @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.

    Capture.PNG

    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?

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

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

  • 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! :|

    1.PNG

    2.PNG

  • @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

  • @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?

    1.PNG

  • @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.

  • @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.

  • @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?

  • @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

  • One more question.
    Should we update Qt to the latest version (Qt6 or 6.1) to be able to use QtQuick3D? If so, how to use libraries like QtMultimedia which are not supported in those up-to-date versions yet? :(

  • @qcoderpro said in How to install module «QtMultimedia» on Windows:

    Should we update Qt to the latest version (Qt6 or 6.1) to be able to use QtQuick3D?

    Qt Quick 3D is available in Qt 5.15: https://doc.qt.io/qt-5/qtquick3d-index.html

  • @JKSH

    I’m trying to implement the following example of this page but get errors!

    Untitled.png

  • @qcoderpro said in How to install module «QtMultimedia» on Windows:

    I’m trying to implement the following example of this page but get errors!

    Did you install the Qt Quick 3D module?

    Open your MaintenanceTool and select «Add Components». Select Qt > Qt 5.15.2 > Qt Quick 3D

  • @JKSH

    Probably still can’t be done using 5.15.2!

    Capture.PNG

  • @qcoderpro said in How to install module «QtMultimedia» on Windows:

    Probably still can’t be done using 5.15.2!

    I just realized that you’re trying to use Instanced Rendering.
    This feature is only available from Qt 6.1 onwards: https://www.qt.io/blog/qtquick3d-instanced-rendering

    Qt 6.1 is not yet released.

    Have a look at the link I posted before; it contains examples that work with Qt 5.15.2.

Источник

I am trying to compile qGo, after installing qt5

git clone https://github.com/pzorin/qgo.git
cd qgo
qmake
make
sudo make install

Right now the latest error is saying it can’t find multimedia

# make
cd src/ && ( test -e Makefile || /usr/lib/x86_64-linux-gnu/qt5/bin/qmake /home/jdm/Downloads/qgo/src/src.pro -o Makefile ) && make -f Makefile 
Project ERROR: Unknown module(s) in QT: multimedia
make: *** [sub-src-make_first] Error 3

I guessed the library libqt5multimedia5 based on this question, but the computer it says its already there and the error persists.

libqt5multimedia5 is already the newest version.

There is another similar question but the user answered his own question. I am not sure how it applies here:

  • «Project ERROR: Unknown module(s) in QT: multimedia» when building my project with fresh static Qt5.3.0

Community's user avatar

asked Nov 15, 2014 at 17:16

john mangual's user avatar

john mangualjohn mangual

7,38812 gold badges55 silver badges92 bronze badges

1

I’m not able to post a comment, so I will write it as an answer. Your problem has been solved here:
https://forum.qt.io/topic/27608/unknown-module-multimedia/6

In order to handle the issue you should try installing packages that are absent:

sudo apt-get install qtmultimedia5-dev libqt5multimediawidgets5 libqt5multimedia5-plugins libqt5multimedia5

and restart your Qt Creator after that.
Cheers.

UPDATE. If it will not work, try another solution:

sudo apt-get update
sudo apt-get build-dep qtmultimedia5-dev
sudo apt-get source --compile qtmultimedia5-dev

UPDATE 2 For me the solution was the following:

  1. Download sources from http://download.qt.io/development_releases/qt/5.4/5.4.0-rc/submodules/

  2. Build them, add the library manually.

answered Mar 17, 2015 at 7:20

gsa's user avatar

2

Источник

I installed the qtmultimedia5-dev package and that got me a little farther. The qmake command ran fine and then tried make. The next error I got was this:

mythserver:CasterSoundboard $ make
g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -fPIE -DQT_NO_DEBUG -DQT_MULTIMEDIA_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -I. -I/usr/include/qt5 -I/usr/include/qt5/QtMultimedia -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtCore -I. -o main.o main.cpp
main.cpp:23:24: fatal error: MainWindow.h: No such file or directory
 #include "MainWindow.h"

I tried renaming the file from mainwindow.h to MainWindow.h and that got a little farther but then this error occurred:

mythserver:CasterSoundboard $ mv mainwindow.h MainWindow.h
mythserver:CasterSoundboard $ make
g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -fPIE -DQT_NO_DEBUG -DQT_MULTIMEDIA_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -I. -I/usr/include/qt5 -I/usr/include/qt5/QtMultimedia -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtCore -I. -o main.o main.cpp
g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -fPIE -DQT_NO_DEBUG -DQT_MULTIMEDIA_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -I. -I/usr/include/qt5 -I/usr/include/qt5/QtMultimedia -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtCore -I. -o CasterPlayer.o CasterPlayer.cpp
CasterPlayer.cpp: In member function ‘virtual void CasterPlayerWidget::dropEvent(QDropEvent*)’:
CasterPlayer.cpp:320:22: warning: unused variable ‘ret’ [-Wunused-variable]
                  int ret = msgBox.exec();
                      ^
CasterPlayer.cpp: At global scope:
CasterPlayer.cpp:357:6: warning: unused parameter ‘event’ [-Wunused-parameter]
 void CasterPlayerWidget::mouseMoveEvent(QMouseEvent *event)
      ^
CasterPlayer.cpp:363:6: warning: unused parameter ‘event’ [-Wunused-parameter]
 void CasterPlayerWidget::paintEvent(QPaintEvent *event)
      ^
g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -fPIE -DQT_NO_DEBUG -DQT_MULTIMEDIA_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -I. -I/usr/include/qt5 -I/usr/include/qt5/QtMultimedia -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtCore -I. -o CasterBoard.o CasterBoard.cpp
g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -fPIE -DQT_NO_DEBUG -DQT_MULTIMEDIA_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -I. -I/usr/include/qt5 -I/usr/include/qt5/QtMultimedia -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtCore -I. -o mainwindow.o mainwindow.cpp
g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -fPIE -DQT_NO_DEBUG -DQT_MULTIMEDIA_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -I. -I/usr/include/qt5 -I/usr/include/qt5/QtMultimedia -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtCore -I. -o CasterLabelColorPicker.o CasterLabelColorPicker.cpp
CasterLabelColorPicker.cpp:33:1: warning: unused parameter ‘parent’ [-Wunused-parameter]
 CasterLabelColorPicker::CasterLabelColorPicker(QWidget *parent)
 ^
CasterLabelColorPicker.cpp:114:6: warning: unused parameter ‘value’ [-Wunused-parameter]
 void CasterLabelColorPicker::slider_HSL_valueChanged(int value)
      ^
g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -fPIE -DQT_NO_DEBUG -DQT_MULTIMEDIA_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -I. -I/usr/include/qt5 -I/usr/include/qt5/QtMultimedia -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtCore -I. -o CSS.o CSS.cpp
CSS.cpp: In constructor ‘HSL_C::HSL_C(RGB_C)’:
CSS.cpp:277:10: warning: ‘h’ may be used uninitialized in this function [-Wmaybe-uninitialized]
     H = h;
          ^
/usr/lib/x86_64-linux-gnu/qt5/bin/rcc -name res res.qrc -o qrc_res.cpp
g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -fPIE -DQT_NO_DEBUG -DQT_MULTIMEDIA_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -I. -I/usr/include/qt5 -I/usr/include/qt5/QtMultimedia -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtCore -I. -o qrc_res.o qrc_res.cpp
/usr/lib/x86_64-linux-gnu/qt5/bin/moc -DQT_NO_DEBUG -DQT_MULTIMEDIA_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -I. -I/usr/include/qt5 -I/usr/include/qt5/QtMultimedia -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtCore -I. -I/usr/include/c++/4.8 -I/usr/include/x86_64-linux-gnu/c++/4.8 -I/usr/include/c++/4.8/backward -I/usr/lib/gcc/x86_64-linux-gnu/4.8/include -I/usr/local/include -I/usr/lib/gcc/x86_64-linux-gnu/4.8/include-fixed -I/usr/include/x86_64-linux-gnu -I/usr/include CasterPlayer.h -o moc_CasterPlayer.cpp
g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -fPIE -DQT_NO_DEBUG -DQT_MULTIMEDIA_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -I. -I/usr/include/qt5 -I/usr/include/qt5/QtMultimedia -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtCore -I. -o moc_CasterPlayer.o moc_CasterPlayer.cpp
/usr/lib/x86_64-linux-gnu/qt5/bin/moc -DQT_NO_DEBUG -DQT_MULTIMEDIA_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -I. -I/usr/include/qt5 -I/usr/include/qt5/QtMultimedia -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtCore -I. -I/usr/include/c++/4.8 -I/usr/include/x86_64-linux-gnu/c++/4.8 -I/usr/include/c++/4.8/backward -I/usr/lib/gcc/x86_64-linux-gnu/4.8/include -I/usr/local/include -I/usr/lib/gcc/x86_64-linux-gnu/4.8/include-fixed -I/usr/include/x86_64-linux-gnu -I/usr/include CasterBoard.h -o moc_CasterBoard.cpp
g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -fPIE -DQT_NO_DEBUG -DQT_MULTIMEDIA_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -I. -I/usr/include/qt5 -I/usr/include/qt5/QtMultimedia -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtCore -I. -o moc_CasterBoard.o moc_CasterBoard.cpp
make: *** No rule to make target `mainwindow.h', needed by `moc_mainwindow.cpp'.  Stop.

So I guess there are other references to mainwindow.h or MainWindow.h throughout other files. But at least I am getting closer!

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Регистрация: 10.09.2018

Сообщений: 2

1

10.09.2018, 10:26. Показов 5508. Ответов 2

разбираюсь с программированием под Astra Linux,
установлен QT
когда в проекте подключаю модуль multimedia в .pro файле

QT += gui network core multimedia

и потом делаю «собрать» — пишет:
Unknown module(s) in QT: multimedia

как так?
И что нужно сделать, чтоб этот модуль подключить?

подскажите пжлста прямо тут, или киньте ссылкой, на крайний случай…

__________________
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94731 / 64177 / 26122

Регистрация: 12.04.2006

Сообщений: 116,782

 10.09.2018, 10:26

2

Источник
Max Payne

Гость

Доброе время суток, собрал Qt статически по одному из гайдов, все собралось без ошибок , определил настройка в Qt Creator, но в файле  проекта не определяется multimedia модуль.

configure -static -platform win32-g++ -debug-and-release -opensource -nomake examples -no-compile-examples -qt-sql-sqlite
-audio-backend

при сборке появляется следующая ошибка

error: Unknown module(s) in QT: multimedia

хотя при обычной линковке все работает. Кто сталкивался со сборкой Qt с модулем multimedia подскажите как правильно собрать этот модуль.
Заранее спасибо .
« Последнее редактирование: Март 13, 2014, 18:28 от Max Payne »
Записан
saim

Гость

Здравствуйте  !! Нужна помощь !! Сборка Qt 5.2.1 статик …

1) конфигурация

configure -static -prefix «D:Qtqt5.2.1Static» -openg
l desktop -qt-sql-sqlite -debug-and-release -qt-libpng -qt-libjpeg -qmake -audio
-backend -wmf-backend -opensource -static -plugin-sql-sqlite

2) но на этапе

mingw32-make

возникает ошибка см.прикр. файл.

Подскажите еще , какие ключи конфигурации нужны для сборки QtMultimedia ??

Заранее спасибо !!

Записан
saim

Гость

Ага , спасибо уже разобрался , не ужели все нужно начинать сначала , в смысле конфигурить и заново все запускать ??

На повторное : mingw32-make
Выкидывает ошибку см.прикр.файл

Записан
Serr500

Гость

mingw32-make clean
mingw32-make

По крайней мере, переконфигурировать не придётся.  Подмигивающий

Записан
saim

Гость

Собрал со след. параметрами:

configure -static -prefix «D:QtQt521_Install» -opengl
 desktop -qt-sql-sqlite -release -qt-libpng -qt-libjpeg -qmake -audio-backend -w
mf-backend -opensource -static -plugin-sql-sqlite -c++11 -opensource -no-compile
-examples -no-vcproj -nomake examples -nomake tests -nomake examples

1) mingw32-make — >прошла на ура , без ошибок
2) mingw32-make install — > прошла на ура , без ошибок

настроил комплект в Qt creator но при сборке элементарного примера сыпет ряд ошибок см. прикр. файлы ..

так же в Path добавил:

D:QtQt521_Installbin;D:QtQt521_Installinclude;D:QtQt521_Installlib

Записан
saim

Гость

1) Конфигурация

configure -static -prefix «G:QtQt521_Install» -debug-
and-release -opensource -c++11 -ltcg -qt-sql-sqlite -opengl desktop -platform wi
n32-g++ -qt-libpng -qt-libjpeg -qmake -audio-backend -wmf-backend -plugin-sql-sq
lite

прошла успешно !!
2) mingw32-make

прошло успешно

3)mingw32-make install

прошло успешно

После настройки Qt Creator, при сборке просто примера выводит ошибку :

:ошибка: cannot find -lz

c:/qt/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../../mingw32/bin/ld.exe: cannot find -lz
collect2: ld returned 1 exit status
mingw32-make[1]: *** [releasetestStatic.exe] Error 1
mingw32-make[1]: Leaving directory `G:/Qt/build-testStatic-Qt521_Static-Release_1′
mingw32-make: *** [release] Error 2
17:40:42: Процесс «C:QtMinGWbinmingw32-make.exe» завершился с кодом 2.
Ошибка при сборке/установке проекта testStatic (комплект: Qt521_Static)
Во время выполнения этапа «Сборка»

Может я чего то не до собрал ??
При настройке Qt Creator (коплекта),qmake.exe я брал с G:QtQt521_Build

Записан
saim

Гость

Так , к чему я в конце концов пришел ?..
К начальному вопросу то есть вопрос с QtMultimedia …

error: Unknown module(s) in QT: multimedia

Какой модуль в Qt 5.2.1 нужно собирать , и как подключить его в *.pro файле !!??

Записан
Источник
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  • Cannot add Multimedia Widgets to Qt Creator C++ project

  1. 10th February 2016, 12:14


    #1

    Default Cannot add Multimedia Widgets to Qt Creator C++ project

    Hi,
    I am trying to compile and run the official Media Player Example in Qt:
    http://doc.qt.io/qt-5/qtmultimediawi…r-example.html
    for a Raspberry Pi running Raspbian Jessie. I still have no success: when I build the project, the following error appears:

    1. :-1: error: Unknown module(s) in QT: multimedia multimediawidgets
    

    To copy to clipboard, switch view to plain text mode 

    I installed «sudo apt-get install qtmultimedia5-dev» but without any success. Is it the right module to install?
    My Qt should be up to date, and I don’t know where the problem can be. Could anyone help please?
    Thanks!

    Last edited by Cazzaniga; 10th February 2016 at 12:27.

  2. 11th February 2016, 15:04


    #2

    Default Re: Cannot add Multimedia Widgets to Qt Creator C++ project

    Please, could anyone give some hints? The multimedia package seems to be installed well, but in Qt the folowing error remains:

    1. error: Unknown module(s) in QT: multimedia
    

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    Maybe the package has to be manually installed into Qt in some way?
    Thanks!

  3. 11th February 2016, 16:43


    #3

    Default Re: Cannot add Multimedia Widgets to Qt Creator C++ project

    Have you tried on a desktop just to see if it might be Raspberry Pi related?

    Cheers,
    _

  4. 11th February 2016, 16:48


    #4

    Default Re: Cannot add Multimedia Widgets to Qt Creator C++ project

    Thanks anda_skoa,
    I think it’s not a problem related to the Raspberry Pi, because the build fails in Qt at the desktop side!
    EDIT:
    perhaps you mean that I should try to not cross-platform for RPi and try to compile for desktop?

  5. 11th February 2016, 17:10


    #5

    Default Re: Cannot add Multimedia Widgets to Qt Creator C++ project

    Yes, try a desktop build.

    Also, if you are cross-compiling, make sure the cross compiled Qt has these modules built.

    Cheers,
    _

  6. 12th February 2016, 08:44


    #6

    Default Re: Cannot add Multimedia Widgets to Qt Creator C++ project

    Also, if you are cross-compiling, make sure the cross compiled Qt has these modules built.

    How can I check this? Is it an option in the Qt project Properties?

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Я пытаюсь скомпилировать и запустить официальный пример Media Player в Qt: http://doc.qt.io/qt-5/qtmultimediawidgets-player-example.html для Raspberry Pi работает Raspbian Джесси. У меня все еще нет успеха: при сборке проекта появляется следующая ошибка:

:-1: error: Unknown module(s) in QT: multimedia multimediawidgets

Это называется кодом .pro: 

QT += multimedia

Мой Qt должен быть современным, и я не знаю, где может быть проблема.
Может ли кто-нибудь помочь, пожалуйста?
Спасибо!

РЕДАКТИРОВАТЬ: я установил «sudo apt-get install qtmultimedia5-dev», но безуспешно. Правильный ли модуль для установки?

РЕДАКТИРОВАТЬ 2: пакет qtmultimedia5, кажется, хорошо установлен, но ошибка «Неизвестный модуль (и)» в Qt остается! Возможно, после установки библиотека должна быть каким-то образом добавлена ​​вручную? Пожалуйста помоги!

0

Решение

У меня есть малина 1 модель B, и первое, что я хотел сделать, — это медиацентр с нуля. Конечно, в Qt.

К сожалению, я много боролся, прежде чем сдаться и откатиться на обертку для omxplayer, которую я все еще разрабатываю.

Однако несколько недель назад gstreamer все еще не поддерживал бэкэнд OMX (поэтому вы не можете воспроизводить прилично любой вид медиа).

Обратите внимание, что вам нужно купить лицензии MPEG-2 и VC-1, чтобы получить аппаратное ускорение для мультимедиа, в противном случае вы можете легко получить очень низкий fps (и плохой звук) во время воспроизведения mpegs и так далее.

Взгляни на эта страница для недавней версии Qt.

Удачи!

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