视频播放的关键代码如下：

使用Qt6的QMediaPlayer，QVideoWidget实现

void FunnyWidget::initVideo()
{player = new QMediaPlayer(this);videoWidget = new QVideoWidget(this);playButton = new QPushButton("Play", this);pauseButton = new QPushButton("Pause", this);stopButton = new QPushButton("Stop", this);// 设置视频输出player->setVideoOutput(videoWidget);// 设置按钮布局QHBoxLayout *buttonLayout = new QHBoxLayout;buttonLayout->addWidget(playButton);buttonLayout->addWidget(pauseButton);buttonLayout->addWidget(stopButton);// 主窗口布局QVBoxLayout *mainLayout = new QVBoxLayout;mainLayout->addWidget(videoWidget);mainLayout->addLayout(buttonLayout);QWidget *centralWidget = new QWidget;