Phonon: не понятная ошибка

/*
 * File:   main.cpp
 * Author: u0807
 *
 * Created on 10 марта 2015 г., 15:57
 */
 
#include "myClass.h"
 
 
    QString ping_Around;
    QStringList arguments;
    QStringList arguments1;
    QStringList arguments2;
    QStringList arguments3;
    QProcess myProcess;
    QProcess myProcess1;
    QProcess myProcess2;
    QProcess myProcess3;
    QStringList strlstPingResults;
    QStringList strlstPingResults1;
    QStringList strlstPingResults2;
    QStringList strlstPingResults3;
    QStringList Ss[4];
    QGraphicsTextItem* itemText[4];
    QString count_Pack[4];
    QPushButton* Add_Host;
    Phonon::MediaObject *mediaO;
 
 
void myClass::timer_overflow() {
    myProcess.start(ping_Around, arguments);
    myProcess.waitForFinished(1000);
    myProcess1.start(ping_Around, arguments1);
    myProcess1.waitForFinished(1000);
    myProcess2.start(ping_Around, arguments2);
    myProcess2.waitForFinished(1000);
    myProcess3.start(ping_Around, arguments3);
    myProcess3.waitForFinished(1000);
    
    strlstPingResults<<myProcess.readAll();
    Ss[0] = strlstPingResults[0].split('\n');
    strlstPingResults1<<myProcess1.readAll();
    Ss[1] = strlstPingResults1[0].split('\n');
    strlstPingResults2<<myProcess2.readAll();
    Ss[2] = strlstPingResults2[0].split('\n');
    strlstPingResults3<<myProcess3.readAll();
    Ss[3] = strlstPingResults3[0].split('\n');
    for (int i = 0; i < 4; i++) {
        if (Ss[i].count() > 1) {
            count_Pack[i] = Ss[i][4].mid(23, 1);
        }
    }
    for (int i = 0; i < 4; i++) {
        if (count_Pack[i].count() > 0) {
            if (count_Pack[i] == "1") {
                item[i]->setBrush(QBrush(Qt::green));
 
            }
        }
        else {
            item[i]->setBrush(QBrush(Qt::red));
        }
    }
    
}
 
 
void myClass::btnClicked() {
    
}
 
 
void myClass::slotFinished() {
    
}
 
myClass::myClass(QObject *parent): QGraphicsScene(parent) {
    QFont fontForButton;
    fontForButton.setPointSize(7);
    
    mediaO = new Phonon::MediaObject(this);
    
    QObject::connect(mediaO, SIGNAL(finished()), this, SLOT(slotFinished()));
    QString str("Active.wav");
    mediaO->setCurrentSource(str);
    mediaO->play();
    
    Add_Host = new QPushButton("&Add", 0);
    Add_Host->setFixedSize(23, 20);
    Add_Host->setGeometry(-94, 30, 23, 20);
    Add_Host->setFont(fontForButton);
    
    QObject::connect(Add_Host, SIGNAL(clicked()), this, SLOT(btnClicked()));
    QGraphicsProxyWidget * item_Widget = addWidget(Add_Host);
    Add_Host->show();
    
    ping_Around = "/bin/ping";
    arguments << "-c" << "1" << "10.31.3.130";
    arguments1 << "-c" << "1" << "10.31.4.130";
    arguments2 << "-c" << "1" << "10.31.5.130";
    arguments3 << "-c" << "1" << "10.31.6.130";
    this->setSceneRect(QRectF(-90, 0, 15, 15));
    
    for (int i = 0; i < 4; i++) {    
        item[i] = new QGraphicsEllipseItem(0, this);
        item[i]->setRect(QRectF(-90, -35 + (i * 16), 15, 15));
        item[i]->setBrush(QBrush(Qt::yellow));
    }
    itemText[1] = new QGraphicsTextItem(0, this);
    timer = new QTimer;
    QObject::connect(timer, SIGNAL(timeout()), this, SLOT(timer_overflow()));
    timer->start(4500);
}
 
 
int main(int argc, char *argv[]) {
    QApplication app(argc, argv);
    myClass m;
    QGraphicsView v(&m);
    v.setWindowFlags(Qt::WindowStaysOnTopHint);
    v.setRenderHints(QPainter::Antialiasing);
    v.show();
    v.setGeometry(1350, 700, 23, 90); 
    
    return app.exec();
}

Phonon::MediaObject *mediaO;

mediaO = new Phonon::MediaObject; //это
//вместо
mediaO = new Phonon::MediaObject(this); //этого

void myClass::slotFinished() {
    QString str("Active.wav");
    mediaO->setCurrentSource(str);
    mediaO->play();
}

# This file is generated automatically. Do not edit.
# Use project properties -> Build -> Qt -> Expert -> Custom Definitions.
TEMPLATE = app
DESTDIR = dist/Debug/GNU_1-Linux-x86
TARGET = QtApplication_2
VERSION = 1.0.0
CONFIG -= debug_and_release app_bundle lib_bundle
CONFIG += debug 
PKGCONFIG +=
QT = core gui widgets
SOURCES += main.cpp
HEADERS += myClass.h
FORMS +=
RESOURCES +=
TRANSLATIONS +=
OBJECTS_DIR = build/Debug/GNU_1-Linux-x86
MOC_DIR = 
RCC_DIR = 
UI_DIR = 
QMAKE_CC = gcc
QMAKE_CXX = g++
DEFINES += 
INCLUDEPATH += 
LIBS +=

# This file is generated automatically. Do not edit.
# Use project properties -> Build -> Qt -> Expert -> Custom Definitions.
TEMPLATE = app
DESTDIR = dist/Release/GNU_1-Linux-x86
TARGET = QtApplication_2
VERSION = 1.0.0
CONFIG -= debug_and_release app_bundle lib_bundle
CONFIG += release 
PKGCONFIG +=
QT = core gui widgets
SOURCES += main.cpp
HEADERS += myClass.h
FORMS +=
RESOURCES +=
TRANSLATIONS +=
OBJECTS_DIR = build/Release/GNU_1-Linux-x86
MOC_DIR = 
RCC_DIR = 
UI_DIR = 
QMAKE_CC = gcc
QMAKE_CXX = g++
DEFINES += 
INCLUDEPATH += 
LIBS +=

    QString str("Active.wav");
    mediaO->setCurrentSource(str);
    mediaO->play();

    mediaO->setCurrentSource(str);

    mediaO->setCurrentSource(str);