网上找答案：https://qt-project.org/forums/viewthread/29185https://qt-project.org/forums/viewthread/29
阅读背景：
解决QMediaPlayer没有声音的问题
来源：互联网
网上找答案：https://qt-project.org/forums/viewthread/29185https://qt-project.org/forums/viewthread/29
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