linux qt4 mp3

#include <QApplication>
#include <QMediaPlayer>
#include <QAudioOutput>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QMediaPlayer player;
    QAudioOutput audioOutput;

    player.setSource(QUrl::fromLocalFile("/path/to/your/music.mp3"));
    player.setAudioOutput(&audioOutput);
    player.play();

    return app.exec();
}