代码:
```c++
QAudioDevice defaultDevice = QMediaDevices::defaultAudioOutput();
QAudioOutput * audioOutput = new QAudioOutput(defaultDevice);
audioOutput->setVolume (0.1);
QMediaPlayer * player = new QMediaPlayer();
player->setAudioOutput (audioOutput);
player->setSource (QUrl ("/music/那些年.mp3"));
player->play ();
```
将中文文件名"那些年.mp3"改为"a.mp3"则播放成功