语音文件被占用，不能写 [复制链接]

语音文件被Phonon/MediaObject播放器播放后，再想删除或写语音文件，会出现：
cannot write the file：The process cannot access the file because it is being used by another process..
当然注销播放器就会释放文件被占用，请问除此之外用什么方法可以让播放器释放文件占用？
不胜感谢！

现在改为播放内存块，用QBuffer解决：
  QFile *myfile;
    myfile = new QFile("D:/music/3min.wav");
    myfile->open(QIODevice::ReadWrite);
    QByteArray ByteArray = myfile->readAll();
    Phonon::MediaObject* player = Phonon::createPlayer( Phonon::MusicCategory );
    QBuffer* soundData = new QBuffer( player );
    soundData->setData( ByteArray );
    player->setCurrentSource( soundData );
    player->setParent( this );
    player->play();
    ByteArray.clear();