Phonon - videoPlayer Error

Hello, $username!

I'm using Phonon::videoPlayer from Windows+Qt 4.6 in my music player project as core of it.

The bug is that some mp3-files cannot be opened and Phonon::videoPlayerInstance->mediaObject()->errorString() is:

Quote:

the operation cannot be performed because the pins are not connected ($80040209)

I tried to pick out the plot of error-generating code, so its something like this:

Code:

Tester::Tester(QApplication *starter = 0)
{
    this->starter = starter;
 
    core.mediaObject()->setTickInterval(1000);
    sources.clear();
 
    connect(core.mediaObject(), SIGNAL(stateChanged(Phonon::State, Phonon::State)),
            this, SLOT(stateChanged(Phonon::State, Phonon::State)));
 
    QStringList list = QFileDialog::getOpenFileNames(0,"Phonon Test",".",tr("audios (*.mp3 *.wma *.ogg *.wave *.midi)"));
 
    for (int i = 0; i < list.size(); i++){
        Phonon::MediaSource source(list.at(i));
        sources.insert(i,source);
    }
    core.mediaObject()->setCurrentSource(sources.at(0));
 
    core.play();
}
 
void Tester::stateChanged(Phonon::State newstate, Phonon::State oldstate)
{
    if (newstate == Phonon::ErrorState) {
            QMessageBox::warning(0, "Phonon Mediaplayer",
                                 core.mediaObject()->errorString(),
                                 QMessageBox::Close);
            if (core.mediaObject()->errorType() == Phonon::FatalError) {
                starter->exit();
            } else {
                core.mediaObject()->stop();
            }
     }
}

As you see, its just clean code with no extraordinary using of Qt.

Anybody knows, is it problem of Windows sound libraries or something else?