Creating a progress bar for audio playback in Qt Widgets - c++

Question

I'm currently working on a Qt Widget (using Qt 6.3) that plays audio and shows a progressbar. But I'm struggling to find a way to connect the audio progress value with the progress bar status.
Here's my code:
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
mMediaPlayer = new QMediaPlayer(this);
audio_output = new QAudioOutput(this);
//this is the part I need help with
connect(mMediaPlayer, SIGNAL(positionChanged(qint64)), this, SLOT(positionChanged(qint64)));
void MainWindow::on_Button_open_media_clicked()
{
QString file_name = QFileDialog::getOpenFileName(this, "Open");
if(file_name.isEmpty()){
return;
}
mMediaPlayer->setSource(QUrl::fromLocalFile(file_name));
mMediaPlayer->setAudioOutput(audio_output);
audio_output->setVolume(ui->volume_slider->value());
on_play_button_clicked();
}
void MainWindow::on_stop_button_clicked()
{
mMediaPlayer->stop();
}
void MainWindow::on_pause_button_clicked()
{
mMediaPlayer->pause();
}
void MainWindow::on_play_button_clicked()
{
audio_output->setVolume(100);
mMediaPlayer->play();
}
void MainWindow::on_mute_button_clicked()
{
if(ui->mute_button->text() == "Mute"){
audio_output->setMuted(true);
ui->mute_button->setText("Unmute");
}
else{
audio_output->setMuted(false);
ui->mute_button->setText("Mute");
}
}
void MainWindow::on_volume_slider_valueChanged(int value)
{
audio_output->setVolume(value);
}
}
I couldn't find a way to do it using the documentation. It might be simple, but I need help.
Any help is gladly appreciated.