I have a simple tutorial with QMovie to display an animated gif image. I download the gif file from this link http://www.gifs.net/Animation11/Anim...d_dog_face.gif.

However calling movie->isValid() always returns false for me. What are the supported file types for QMovie? I thought animated GIF was one of them.

Thanks in advance for your help.

Qt Code: 
  1. #include <QtGui/QApplication>
  2. #include<QWidget>
  3. #include<QHBoxLayout>
  4. #include<QLabel>
  5. #include<QMovie>
  6. #include<QPushButton>
  7. #include<QSlider>
  8. int main(int argc, char *argv[])
  9. {
  10.     QApplication a(argc, argv);
  11.     QWidget *win=new QWidget();
  13.     QPushButton *play=new QPushButton("PLAY");
  14.     QPushButton *stop=new QPushButton("STOP");
  15.     QSlider *slider=new QSlider();
  16.     slider->setMinimum(0);
  17.     slider->setMaximum(200);
  18.     QLabel *label=new QLabel;
  19.     QMovie *movie = new QMovie("anim03.gif");
  20.     if (movie->isValid())
  21.         label->setMovie(movie);
  22.     else
  23.         label->setText("asdfasdf");
  24.     QObject::connect(play,SIGNAL(clicked()),movie,SLOT(start()));
  25.     QObject::connect(stop,SIGNAL(clicked()),movie,SLOT(stop()));
  26.     QObject::connect(slider,SIGNAL(valueChanged(int)),movie,SLOT(setSpeed(int)));
  27.     lay->addWidget(label);
  28.     lay->addWidget(play);
  29.     lay->addWidget(stop);
  30.     lay->addWidget(slider);
  31.     win->setLayout(lay);
  32.     win->show();
  33.     return a.exec();
  34. }
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