头文件： 

#ifndef MEDIA_H
#define MEDIA_H

#include
#include
#include
#include
#include

}

class Media : public QMainWindow
{
    Q_OBJECT

public:
    explicit Media(QWidget *parent = 0);
    ~Media();

private:
    Ui::Media *ui;
    QLabel *label;
    QProcess *process;
    QWidget widget;
    QPixmap pix;
    QString file_name;
private slots:
    void on_pushButton_5_clicked();
    void on_kuaijin_clicked();
    void on_pushButton_2_clicked();
    void on_jinying_clicked();
    void on_small_clicked();
    void on_pushButton_clicked();
    void on_pushButton_4_clicked();
    void on_down_clicked();
    void on_up_clicked();
    void on_start_clicked();
    void on_open_clicked();

};

#endif // MEDIA_H

主函数：

#include
#include "media.h"
#include
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QTextCodec::setCodecForTr(QTextCodec::codecForName("GBK"));
    QTextCodec::setCodecForLocale(QTextCodec::codecForName("GBK"));
    QTextCodec::setCodecForCStrings(QTextCodec::codecForName("GBK"));

    Media w;
    w.setDisabled(false);
    w.setFixedSize(w.width(),w.height());
    w.show();
    return a.exec();
}

 cpp函数：

#include "media.h"
#include "ui_media.h"
int i=0,j=0;
QString medialist[100];//存放播放的音频
QStringList::Iterator it;//迭代器

Media::Media(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::Media)
{
    ui->setupUi(this);
/*************************************添加背景图片*************************************/
    QImage image1;
    image1.load(":/55.png");    //括号内为图片的相对目录
    QImage image2 = image1.scaled(320,240);
    QPalette palette;
    palette.setBrush(this->backgroundRole(),QBrush(image2));
    this->setPalette(palette);
     process=new QProcess(this);
     this->setWindowTitle(tr("播放器-----菜鸟营制作中心"));
    this->setWindowIcon(QIcon("../../Media/100.png"));

}

Media::~Media()
{
    delete ui;
}
/*************************************打开文件*************************************/
void Media::on_open_clicked()
{
    int k=0;
    QStringList list=QFileDialog::getOpenFileNames(this,"selecct media","/","*.*");
    for(it=list.begin();it

}
/*************************************上一曲*************************************/
void Media::on_up_clicked()
{
    process->close();
    i++;
    if(i>j)
        i=0;
    process->close();
    QString path="../../Media/mplayer.exe";
    QStringList list1;
    list1<<"-slave";
    list1<<"-quiet";
    list1<<"-wid";//这两个不能分开写
    list1<

}
/*************************************停止播放*************************************/
void Media::on_pushButton_4_clicked()
{
    process->write("p\n");
}
/*************************************增大音量*************************************/
void Media::on_pushButton_clicked()
{
    process->write("volume +1\n");
}
/*************************************减小音量*************************************/
void Media::on_small_clicked()
{
    process->write("volume -1\n");
}
/*************************************开启静音*************************************/
void Media::on_jinying_clicked()
{
    process->write(" mute 1\n");
}
/*************************************关闭静音*************************************/
void Media::on_pushButton_2_clicked()
{
     process->write(" mute 0\n");
}
/*************************************快进*************************************/
void Media::on_kuaijin_clicked()
{
    process->write("seek +1\n");
}
/*************************************快退*************************************/
void Media::on_pushButton_5_clicked()
{
    process->write("seek -2\n");
}

效果图：