xcamera_widget.h

class XCameraWidget :public QWidget
{Q_OBJECTpublic:XCameraWidget(QWidget* p = nullptr);//渲染视频void Draw();//123//清理资源,再一个窗口被覆盖后 清理之前窗口生成的资源1~XCameraWidget();//123
private:XDecodeTask* decode_ = nullptr;//123XDemuxTask* demux_ = nullptr;XVideoView* view_ = nullptr;};

xcamera_widget.cpp

XCameraWidget::XCameraWidget(QWidget* p) :QWidget(p)
{//接收拖拽this->setAcceptDrops(true);
}//拖拽松开
void XCameraWidget::dropEvent(QDropEvent* e)
{//拿到urlqDebug() << e->source()->objectName();auto wid = (QListWidget*)e->source();qDebug() << wid->currentRow();auto cam = XCameraConfig::Instance()->GetCam(wid->currentRow());Open(cam.sub_url);}bool XCameraWidget::Open(const char* url)
{if (demux_)demux_->Stop();if (decode_)decode_->Stop();//打开解封装线程demux_ = new XDemuxTask();if (!demux_->Open(url)){return false;}//打开视频解码器线程decode_ = new XDecodeTask();auto para = demux_->CopyVideoPara();if (!decode_->Open(para->para)){return false;}//设定解码线程接收解封装数据demux_->set_next(decode_);//初始化渲染参数view_ = XVideoView::Create();view_->set_win_id((void*)winId());view_->Init(para->para);//启动解封装和解码线程demux_->Start();decode_->Start();return true;
}//渲染视频
void XCameraWidget::Draw()
{if (!demux_ || !decode_ || !view_)return;auto f = decode_->GetFrame();if (!f)return;view_->DrawFrame(f);XFreeFrame(&f);
}//清理资源
XCameraWidget::~XCameraWidget()
{if (demux_){demux_->Stop();delete demux_;demux_ == nullptr;}if (decode_){decode_->Stop();delete decode_;decode_ == nullptr;}if (view_){view_->Close();delete view_;view_ = nullptr;}
}

xviewer.h        

   public://定时器渲染视频 回调函数void timerEvent(QTimerEvent* ev) override;//123

xviewer.cpp

//定时器渲染视频 回调函数
void XViewer::timerEvent(QTimerEvent* ev)//123
{//总窗口数量int wid_size = sizeof(cam_wids) / sizeof(QWidget*);for (int i = 0; i < wid_size; i++){if (cam_wids[i]){//渲染多窗口视频cam_wids[i]->Draw();}}}在xviewer的构造函数中最后一行添加  startTimer(1);即可启动计时器调用timerEvent函数来进行渲染