QMediaPlayer stream via QIODevice

[RandomRagingGuy]

Hi,
I am trying to play a video using QMediaPlayer streaming functionality. My OS is Windows 7.
The purpose is to play an encrypted stream, I am planning to do this by writing my custom QIODevice. Unfortunately QMediaPlayer::setMedia does not seem to work with the stream argument.

My code looks like this:

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    
    QWidget *widget = new QWidget;
    widget->resize(400, 300);
    
    QVBoxLayout *layout = new QVBoxLayout;
    QMediaPlayer* player = new QMediaPlayer;
    QVideoWidget* vw = new QVideoWidget;
    
    QObject::connect(player, static_cast<void(QMediaPlayer::*)(QMediaPlayer::Error)>(&QMediaPlayer::error),
                     []( QMediaPlayer::Error err)
    {
        qDebug() <<"Error " << err;
    });
    
    QObject::connect(player, &QMediaPlayer::stateChanged,
                     []( QMediaPlayer::State s)
    {
        qDebug() <<"State " << s;
    });
    
    layout->addWidget(vw);
    widget->setLayout(layout);
    
    player->setVideoOutput(vw);
    
    QFile file ("Wildlife.wmv");
    if(!file.open(QIODevice::ReadOnly))
        qDebug() << "Could not open file";
   #ifdef OK
    player->setMedia(QUrl::fromLocalFile("video.wmv") );
   #else
    player->setMedia(QUrl::fromLocalFile("video.wmv"), &file);
   #endif
    player->play();
    widget->show();
    qDebug() << player->availableMetaData() << player->currentMedia().canonicalUrl();
    return app.exec();
}

When I run this code, State QMediaPlayer::PlayingState is printed to the stdout, but the video does not play, nor the positionChanged signal is emitted. Obviously if I define OK the video is played correctly.

This page seems to suggest that streaming source is supported with DirectShow.

How can I troubleshoot this issue?