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;
};

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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

[tbscope]

You have the correct decoder installed?

[baluk]

I am sorry but what decoder I should use. I thought Qt takes the default one that is provided in my windows vista, isn't it so. I don't have much idea about decoder stuff I am trying to find it anyway.

Thank You,
Baluk

[squidge]

Unless you have a codec capable of playing the video, all you'll get is audio.

We can't tell you which decoder to use as we don't know your file format.

[baluk]

I want to play avi, mp3 and mkv format file.

[squidge]

avi and mkv are only containers, what is the file type that you will be playing inside those containers? eg. xvid.

[baluk]

oke. File type is VLC media file.

[squidge]

No, it's not.

That's just the registered player you are using to play the file.

[baluk]

Oke. Now I got to understand what is file format. I want to play avc1 and MPGV codec files.

[squidge]

Install FFDShow

[baluk]

I have it installed on my system. My audio was playing with this codec support only.