Qt播放qrc中的mp3 - player=new QMediaPlayer(this);
//如果是在qrc资源文件中用fromEncoded函数获取mp3地址（记得有前缀(/new或其他的)要加哦）
player->setMedia(QUrl::fromEncoded("qrc:/new/music/bgm_1.mp3"));
player->setVolume(50);
player->play();
2.其他：来自网络 Qt媒体播放之QMediaPlayer - QMediaPlayer *player = new QMediaPlayer();
/*从本地读取*/
player->setMedia(QUrl("F:/pianai.mp3"));
player->setMedia(QMediaContent(QUrl::fromLocalFile("F:/pianai.mp3")));
player->setMedia(QUrl("qrc:/static/pianai.mp3"));
/*网络读取*/
player->setMedia(QMediaContent(QUrl("http://s320.xiami.net/348/2110080348/2102495981/1795105593_1516272907214.mp3?ccode=xiami_mac_&expire=86400&duration=210&psid=fac47f82a061b1bd1e408f6ad353a7ed&ups_client_netip=129.204.235.253&ups_ts=1608702323&ups_userid=0&utid=&vid=1795105593&fn=1795105593_1516272907214.mp3&vkey=Bed34e421fe1306ac9bf9095e5793b2a9")));
player->setVolume(50);
player->play();
3.播放多个视频（也可以播放多个音乐） - QHBoxLayout *mainLayout=new QHBoxLayout(this);
QMediaPlaylist *playlist = new QMediaPlaylist();
/*本地读取*/
playlist->addMedia(QMediaContent(QUrl::fromLocalFile("F:/1.mp4")));
playlist->addMedia(QUrl("qrc:/static/1.mp4"));
playlist->addMedia(QUrl("F:/1.mp4"));
/*网络读取*/
playlist->addMedia(QMediaContent(QUrl("https://v-cdn.zjol.com.cn/280443.mp4")));
playlist->addMedia(QMediaContent(QUrl("https://v-cdn.zjol.com.cn/276982.mp4")));
playlist->setCurrentIndex(1);
QMediaPlayer *player = new QMediaPlayer();
player->setPlaylist(playlist);
QVideoWidget *videoWidget = new QVideoWidget();
player->setVideoOutput(videoWidget);
mainLayout->addWidget(videoWidget);
player->play();
4.播放单个视频 - QHBoxLayout *mainLayout=new QHBoxLayout(this);
QVideoWidget *videoWidget = new QVideoWidget();
QMediaPlayer *player = new QMediaPlayer();
/*从本地读取*/
player->setMedia(QUrl("qrc:/static/1.mp4"));
player->setMedia(QUrl("F:/1.mp4"));
player->setMedia(QMediaContent(QUrl::fromLocalFile("F:/1.mp4")))
/*网络读取*/
player->setMedia(QMediaContent(QUrl("https://v-cdn.zjol.com.cn/280443.mp4")));
player->setVideoOutput(videoWidget);
mainLayout->addWidget(videoWidget);
player->play();
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