IP摄像机直播

Question

在这里，我要放置用Qt编写的代码，但是视频流无法正常工作。当IP放置在浏览器上时，视频可以完美显示，当我们运行该应用程序时，它没有任何输出。

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>
#include <QGridLayout>
#include <QMediaPlayer>
#include <QNetworkRequest>
#include <QVideoWidget>

#include <QNetworkAccessManager>


  MainWindow::MainWindow(QWidget *parent) :
  QMainWindow(parent),
 ui(new Ui::MainWindow)
 {
   ui->setupUi(this);

  setWindowTitle("IPCAM Video Streaming");
  QVideoWidget *_vw1 = new QVideoWidget;
  QMediaPlayer *_player1 = new QMediaPlayer;
  QGridLayout *layout = new QGridLayout;
  layout->addWidget(_vw1,0,0,1,1);

  QWidget *win = new QWidget();
  win->setLayout(layout);
  setCentralWidget(win);

// QMediaPlayer -> QVideoWidget
  _player1->setVideoOutput(_vw1);

const QUrl url1 = QUrl("http://ipaddress/mjpeg.cgi");
const QNetworkRequest requesturl1(url1);

_player1->setMedia(requesturl1);

_vw1->setGeometry(100,100,300,400);
_vw1->show();

_player1->play();
 }

 MainWindow::~MainWindow()
{
 delete ui;
}