VideoWidget problem

[baluk]

Hi,

I am using videoWidget to play a video file. But i want to play a video with original aspect ration which means i have to set videoWidget::AspectrationAuto property. But when I play with original aspect ration the video is played in the middle of the videowidget and the rest (upper and bottom side) is seen as a black screen. I can't set the videowidget screen size to the original video frame size. I would be thankful for any suggestions.

Thank You,
Baluk

[wysota]

Is the video widget in a layout? If so, set its SizePolicy to Fixed/Fixed, that should be enough.

[baluk]

Thanks for the reply. I am getting some syntax errors when setting QSizePolicy. Here I am copying my code can please check whats wrong.

QSizePolicy policy = new QSizePolicy();
      policy.setHorizontalPolicy(QSizePolicy::Fixed);
      policy.setVerticalPolicy(QSizePolicy::Fixed);
      videoWidget->setSizePolicy(policy);

QSizePolicy policy = new QSizePolicy();
      policy.setHorizontalPolicy(QSizePolicy::Fixed);
      policy.setVerticalPolicy(QSizePolicy::Fixed);
      videoWidget->setSizePolicy(policy);

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Thank You,
baluk

[wysota]

Obviously the first line is wrong, it should be:

QSizePolicy policy;

QSizePolicy policy;

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[baluk]

I still can't rid of the main problem. I have 3 QFrames and I applied grid layout to all. And I used one frame for video play. QSizePolicy doesn't solve the problem.

[wysota]

Please show us some code reproducing the problem. Just please don't post your whole application.

[baluk]

Sure.

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
   ui->setupUi(this);
 
 
   this->mediaObject = new Phonon::MediaObject(this);
   this->audioOutput = new Phonon::AudioOutput(Phonon::VideoCategory,this);
     Phonon::createPath(mediaObject, audioOutput);
     Phonon::VideoWidget *videoWidget = new Phonon::VideoWidget(ui->frame);
 
     QSizePolicy policy;
     policy.setHorizontalPolicy(QSizePolicy::Fixed);
     policy.setVerticalPolicy(QSizePolicy::Fixed);
     videoWidget->setSizePolicy(policy);
     videoWidget->setAspectRatio(Phonon::VideoWidget::AspectRatioAuto);
 
     Phonon::createPath(mediaObject, videoWidget);
     QUrl url("output_1.avi");
 
     mediaObject->setCurrentSource(url);
     mediaObject->setTickInterval(1000);
 
    connect(mediaObject, SIGNAL(finished()), mediaObject, SLOT(deleteLater()));
    connect(ui->pause,SIGNAL(clicked()),mediaObject,SLOT(pause()));
    connect(ui->play,SIGNAL(clicked()),mediaObject,SLOT(play()));
    connect(ui->stop,SIGNAL(clicked()),mediaObject,SLOT(stop()));    
}

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
   ui->setupUi(this);


   this->mediaObject = new Phonon::MediaObject(this);
   this->audioOutput = new Phonon::AudioOutput(Phonon::VideoCategory,this);
     Phonon::createPath(mediaObject, audioOutput);
     Phonon::VideoWidget *videoWidget = new Phonon::VideoWidget(ui->frame);

     QSizePolicy policy;
     policy.setHorizontalPolicy(QSizePolicy::Fixed);
     policy.setVerticalPolicy(QSizePolicy::Fixed);
     videoWidget->setSizePolicy(policy);
     videoWidget->setAspectRatio(Phonon::VideoWidget::AspectRatioAuto);

     Phonon::createPath(mediaObject, videoWidget);
     QUrl url("output_1.avi");
    
     mediaObject->setCurrentSource(url);
     mediaObject->setTickInterval(1000);

    connect(mediaObject, SIGNAL(finished()), mediaObject, SLOT(deleteLater()));
    connect(ui->pause,SIGNAL(clicked()),mediaObject,SLOT(pause()));
    connect(ui->play,SIGNAL(clicked()),mediaObject,SLOT(play()));
    connect(ui->stop,SIGNAL(clicked()),mediaObject,SLOT(stop()));    
}

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Thank You,

Baluk

[wysota]

Looks like someone forgot to put the video widget in a layout.

[baluk]

Yes. Now I applied the layout.

QHBoxLayout *hVideo = new QHBoxLayout(ui->frame);
     hVideo->addWidget(videoWidget);

QHBoxLayout *hVideo = new QHBoxLayout(ui->frame);
     hVideo->addWidget(videoWidget);

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But still the same result. I am attaching the image of my app output. So you can have a clear picture.

Thank You,
Baluk

[wysota]

What does sizeHint() of the video widget return during playback? Note, you have to query for it during playback, it won't return proper value otherwise.

[baluk]

oke. I did query the sizeHint(), it returns the QSize(640, 480). But its the same value returned for every video. What I thought is, it was returning the player(widget) size but not the video file size. I am not sure.

[wysota]

When do you query for the sizeHint()? Please show us the code.

[baluk]

Sure. Here it is

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
   ui->setupUi(this);
 
 
   this->mediaObject = new Phonon::MediaObject(this);
   this->audioOutput = new Phonon::AudioOutput(Phonon::VideoCategory,this);
     Phonon::createPath(mediaObject, audioOutput);
     Phonon::VideoWidget *videoWidget = new Phonon::VideoWidget(ui->frame);
    QHBoxLayout *hVideo = new QHBoxLayout(ui->frame);
     hVideo->addWidget(videoWidget);
     QSizePolicy policy;
     policy.setHorizontalPolicy(QSizePolicy::Fixed);
     policy.setVerticalPolicy(QSizePolicy::Fixed);
     videoWidget->setSizePolicy(policy);
     videoWidget->setAspectRatio(Phonon::VideoWidget::AspectRatioAuto);
     QSize size= videoWidget->sizeHint();
     videoWidget->setFixedSize(size);
     qDebug() << size;
     Phonon::createPath(mediaObject, videoWidget);
    QUrl url("output_1.avi");
    mediaObject->setCurrentSource(url);
 
     mediaObject->setTickInterval(1000);
 
    connect(mediaObject, SIGNAL(finished()), mediaObject, SLOT(deleteLater()));
    connect(ui->pause,SIGNAL(clicked()),mediaObject,SLOT(pause()));
    connect(ui->play,SIGNAL(clicked()),mediaObject,SLOT(play()));
    connect(ui->stop,SIGNAL(clicked()),mediaObject,SLOT(stop()));
}

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
   ui->setupUi(this);


   this->mediaObject = new Phonon::MediaObject(this);
   this->audioOutput = new Phonon::AudioOutput(Phonon::VideoCategory,this);
     Phonon::createPath(mediaObject, audioOutput);
     Phonon::VideoWidget *videoWidget = new Phonon::VideoWidget(ui->frame);
    QHBoxLayout *hVideo = new QHBoxLayout(ui->frame);
     hVideo->addWidget(videoWidget);
     QSizePolicy policy;
     policy.setHorizontalPolicy(QSizePolicy::Fixed);
     policy.setVerticalPolicy(QSizePolicy::Fixed);
     videoWidget->setSizePolicy(policy);
     videoWidget->setAspectRatio(Phonon::VideoWidget::AspectRatioAuto);
     QSize size= videoWidget->sizeHint();
     videoWidget->setFixedSize(size);
     qDebug() << size;
     Phonon::createPath(mediaObject, videoWidget);
    QUrl url("output_1.avi");
    mediaObject->setCurrentSource(url);

     mediaObject->setTickInterval(1000);

    connect(mediaObject, SIGNAL(finished()), mediaObject, SLOT(deleteLater()));
    connect(ui->pause,SIGNAL(clicked()),mediaObject,SLOT(pause()));
    connect(ui->play,SIGNAL(clicked()),mediaObject,SLOT(play()));
    connect(ui->stop,SIGNAL(clicked()),mediaObject,SLOT(stop()));
}

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[wysota]

Let me repeat - query for the sizeHint() after the video starts playing. By the way, your code doesn't work because you set a fixed size on the video widget so how do you expect it to resize to proper size?

[baluk]

Hi wysota you are right. It seems working fine now. I am getting desired output. Thank you very much for your help and sorry for my many questions .

[wysota]

No problem, we are here to help.