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Linker QT error

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #4

    You need to build and install the module first. After that you can use QT += multimedia

    Interested in AI ? www.idiap.ch
    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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    • Z Offline
      Z Offline
      Zola
      wrote on last edited by
      #5

      @SGaist I added it but it still doesn't work.

      jsulmJ 1 Reply Last reply
      0
      • Z Zola

        @SGaist I added it but it still doesn't work.

        jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by
        #6

        @Zola Did you do this first "You need to build and install the module first" as suggested by SGaist??

        https://forum.qt.io/topic/113070/qt-code-of-conduct

        Z 1 Reply Last reply
        0
        • jsulmJ jsulm

          @Zola Did you do this first "You need to build and install the module first" as suggested by SGaist??

          Z Offline
          Z Offline
          Zola
          wrote on last edited by Zola
          #7

          @jsulm Yes module is installed, and it doesn't work.

          Here are the steps I gone through to make project:

          1)Created new project in Qt Creator.

          1. in my main.cpp file I insterted this code

          #include "mainwindow.h"
          #include <QApplication>
          #include <QMediaPlaylist>
          #include <qmobilityglobal.h>
          #include <QVideoWidget>
          #include <QMediaPlayer>

          int main(int argc, char *argv[])
          {
          QApplication a(argc, argv);

          QMediaPlayer *player = new QMediaPlayer;
          
          QMediaPlaylist *playlist = new QMediaPlaylist(player);
          playlist->addMedia(QUrl("http://example.com/myclip1.mp4"));
          playlist->addMedia(QUrl("http://example.com/myclip2.mp4"));
          
          QVideoWidget *videoWidget = new QVideoWidget;
          player->setVideoOutput(videoWidget);
          
          videoWidget->show();
          playlist->setCurrentIndex(1);
          player->play();
          
          return a.exec();
          

          }

          and changed my pro file to this:

          #-------------------------------------------------

          Project created by QtCreator 2015-11-26T03:58:31

          #-------------------------------------------------

          QT += core gui multimedia multimediawidgets

          greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

          TARGET = videoplater
          TEMPLATE = app

          INCLUDEPATH += /usr/include/QtMobility/
          INCLUDEPATH += /usr/include/QtMultimediaKit/

          SOURCES += main.cpp
          mainwindow.cpp

          HEADERS += mainwindow.h

          FORMS += mainwindow.ui

          and it gives me errors I wrote above.

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          • jsulmJ Offline
            jsulmJ Offline
            jsulm
            Lifetime Qt Champion
            wrote on last edited by
            #8

            Same compiler error messages?

            https://forum.qt.io/topic/113070/qt-code-of-conduct

            Z 1 Reply Last reply
            0
            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #9

              Are you sure you built Qt Mobility with the right version of Qt ?

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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              • jsulmJ jsulm

                Same compiler error messages?

                Z Offline
                Z Offline
                Zola
                wrote on last edited by Zola
                #10

                @jsulm Look at post above :) I built it with 4.8.7.

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                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #11

                  One thing that looks suspicious is that you added the include path to QtMobility. If you needed to do that, you would also have to add the link part i.e. LIBS += -lQtMultiMedia -lQtMultiMediaWidgets.

                  But it looks like either Qt Mobility is not correctly installed or not built with the same version of Qt you are currently using.

                  Interested in AI ? www.idiap.ch
                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                  • Z Offline
                    Z Offline
                    Zola
                    wrote on last edited by Zola
                    #12

                    @SGaist How I can install required Qt Mobility version when building my qt 4.8.7? ./configure -mobility? or?

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                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #13

                      First clone the qt-mobility sources:
                      git clone git://code.qt.io/qt-mobility/qt-mobility.git

                      Do an out of source build:
                      mkdir qt-mobility-build
                      cd qt-mobility-build
                      /path/to/qt-mobility/configure -qmake-exec /path/to/your/qmake
                      make && make install

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                      1 Reply Last reply
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