can't see a video play but only music in Qt

[baluk]

Hi,

I want to play a video in my application. But whenever I try to runt he application, I get the message "WARNING: Phonon::createPath: Cannot connect Phonon::MediaObject ( no objectName ) to Phonon::VideoWidget ( no objectName )." And I can hear the music but not video. Here is my code

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    Phonon::VideoPlayer *player =
             new Phonon::VideoPlayer(Phonon::VideoCategory, this);
         player->play(QUrl("path"));
         player->show();
}
 
#include <QMainWindow>
#include <phonon/VideoPlayer>
#include <phonon/backendcapabilities.h>
#include <QUrl>
#include <phonon>
namespace Ui {
    class MainWindow;
}
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
 
private:
    Ui::MainWindow *ui;
};

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    Phonon::VideoPlayer *player =
             new Phonon::VideoPlayer(Phonon::VideoCategory, this);
         player->play(QUrl("path"));
         player->show();
}

#include <QMainWindow>
#include <phonon/VideoPlayer>
#include <phonon/backendcapabilities.h>
#include <QUrl>
#include <phonon>
namespace Ui {
    class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private:
    Ui::MainWindow *ui;
};

To copy to clipboard, switch view to plain text mode 

I tried to run the code from http://www.qtcentre.org/threads/3048...w-black-screen but didn't work. Can any one please tell me what else should be required to play a video.

Thank You,
Baluk