QMediaPlayer doesn't play anything on Ubuntu 14.04/ Qt 5.7



  • I have an problem, I can't play videos on QML on ubuntu 14.04. I have alreay try to build QT5.7 white gstreamer 1.0 but i have those errors.

    Also when I comment all class on my .pro file, and I kept only the main.cpp file. the Qmediaplayer wroks !!!

    I'm using Qthread in 3 class :

    controler.cpp
    httprequestworker.cpp
    opencvworker.cpp

    .pro file :

    TEMPLATE = app
    
    QT += core gui multimedia qml quick widgets serialport printsupport sql
    CONFIG += c++11 extserialport
    
    
    LIBS += -L/usr/local/lib -lPISCAN -lm -lpng -ljpeg  -lopencv_videoio -lopencv_core -lopencv_imgcodecs -lopencv_imgproc -lopencv_objdetect -lopencv_highgui
    
    INCLUDEPATH += /usr/local/include/opencv
    
    DESTDIR = runFiles
    #seial lib
    include(/home/qextserialport-master/src/qextserialport.pri)
    
    SOURCES += main.cpp \
        scanidcard.cpp \
        print.cpp \
        serialcom.cpp \
        smartphoneexract.cpp \
        restapi.cpp \
        barcode.cpp \
        imgprocessing.cpp \
        dbmanager.cpp \
        dbrun.cpp \
        ocr.cpp \
        controler.cpp \
        config.cpp \
        diagnostic.cpp \
        validator.cpp \
        httprequestworker.cpp \
        camera.cpp \
        opencvworker.cpp \
        extract.cpp
    
    RESOURCES += qml.qrc \
        externalresources.qrc
    
    
    # Additional import path used to resolve QML modules in Qt Creator's code model
    QML_IMPORT_PATH =
    
    # Default rules for deployment.
    include(deployment.pri)
    
    DISTFILES += \
    
    HEADERS += \
        types.h \
        PIScan.h \
        scanidcard.h \
        print.h \
        serialcom.h \
        smartphoneexract.h \
        restapi.h \
        barcode.h \
        ocr.h \
        imgprocessing.h \
        dbmanager.h \
        dbrun.h \
        controler.h \
        config.h \
        diagnostic.h \
        validator.h \
        main.h \
        httprequestworker.h \
        camera.h \
        opencvworker.h \
        extract.h
    
    
    #### QML Code ###
     
      Rectangle{
            id:rectvideo
            width: rootrect.width
            height: rootrect.height
            MediaPlayer {
              id: mediaplayer
              source: Qt.resolvedUrl("file:///home/user/video1/video1.mp4")
              autoPlay: true
              loops: Animation.Infinite
            }
            VideoOutput {
                id: previewvid
                width: rootrect.width
                height: rootrect.height
                anchors.fill: parent
                source: mediaplayer
                visible: true
            }
        }
    
        ######  MAIN #####
         
        int main(int argc, char *argv[])
        {
            QApplication app(argc, argv);
            QQmlApplicationEngine engine;
         
            controler contrInst;
            Camera *camInstMain = new Camera;
         
            QQmlContext *ctx = engine.rootContext();
          [B]  contrInst.start(); // thread[/B]
         
            QObject::connect(&contrInst, SIGNAL(onIMEI_Cont(QString)), &restapiInst, SLOT(sendQueryGetIMEI(QString)));
            QObject::connect(&contrInst, SIGNAL(onPostImages_Cont(QString)), &restapiInst, SLOT(sendQueryPostImage(QString)));
            QObject::connect(&restapiInst, SIGNAL(signalRqApi(QStringList)), &contrInst, SLOT(apiRequest(QStringList)));
            QObject::connect(&contrInst, SIGNAL(onStartCapture(int)), camInstMain, SLOT(startCapture(int)));
            QObject::connect(&contrInst, SIGNAL(onStopCapture()), camInstMain, SLOT(stopCapture()));
         
            ctx->setContextProperty("controler", &contrInst);
        [B]    engine.rootContext()->setContextProperty("ProvedorImagem", camInstMain);
            engine.addImageProvider("provedor", camInstMain);[/B]  
         
            engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
            return app.exec();
        }
    

    Error :

        (recy-interface-FO:12010): GLib-GObject-WARNING **: g_object_set_valist: object class 'GstPlayBin' has no property named 'flags'
         
        (recy-interface-FO:12010): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.40.2/./gobject/gsignal.c:2462: signal 'video-changed' is invalid for instance '0x1dce1d0' of type 'GstPlayBin'
         
        (recy-interface-FO:12010): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.40.2/./gobject/gsignal.c:2462: signal 'audio-changed' is invalid for instance '0x1dce1d0' of type 'GstPlayBin'
         
        (recy-interface-FO:12010): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.40.2/./gobject/gsignal.c:2462: signal 'text-changed' is invalid for instance '0x1dce1d0' of type 'GstPlayBin'
         
        (recy-interface-FO:12010): GLib-GObject-WARNING **: cannot register existing type 'GstObject'
         
        (recy-interface-FO:12010): GLib-CRITICAL **: g_once_init_leave: assertion 'result != 0' failed
         
        (recy-interface-FO:12010): GLib-GObject-CRITICAL **: g_type_register_static: assertion 'parent_type > 0' failed
         
        (recy-interface-FO:12010): GLib-CRITICAL **: g_once_init_leave: assertion 'result != 0' failed
         
        (recy-interface-FO:12010): GStreamer-CRITICAL **: gst_pad_get_current_caps: assertion 'GST_IS_PAD (pad)' failed
    

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