需求

        做軟體時，點選進入介面需要播放一段視訊，該視訊的格式可相容swf、rmvb、mpg、mp4等視訊檔案。

原理

        使用QMediaPlayer播放rmvb、mpg、mp4格式

        使用windows Media Player元件播放.swf格式

（對於具體對com的介紹和操作方式以及qt如何使用，將會在後續詳細解說，盡請期待。。。）

Demo

效果圖

關鍵操作

元件初始化操作

    // 初始化QAxWidget控制元件框架相關
    _pAxWidget = new QAxWidget(this);
    _pAxWidget->setObjectName(QString::fromUtf8("axWidget"));
    _pAxWidget->setProperty("geometry", QVariant(QRect(0,0,1024,768)));
    // 繫結控制元件，下面使用UUID，共4種方式：UUID; Control's class name; Control's full name; from afile
    _pAxWidget->setControl(QString::fromUtf8("{d27cdb6e-ae6d-11cf-96b8-444553540000}"));
 

void MainWindow::resizeEvent(QResizeEvent *)
{
    // 更新_pAxWidget內部控制元件的視窗持續大小
    _pAxWidget->setProperty("geometry", QVariant(_pAxWidget->rect()));
}

原始碼

QT += multimedia
QT += multimediawidgets
QT += axcontainer

標頭檔案 mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QMediaPlayer>
#include <QVideoWidget>
#include <QMediaPlaylist>
#include <QAxWidget>
#include <QResizeEvent>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

protected:
    void resizeEvent(QResizeEvent *);

private slots:
    void btnClicked();

private:
    Ui::MainWindow *ui;
    QAxWidget * _pAxWidget;
    QVideoWidget * _pVideoWidget;
    QMediaPlayer * _pMediaPlayer;
    QMediaPlaylist * _pMediaPlaylist;
};

#endif // MAINWINDOW_H
 

原始碼檔案 mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

#include <QFileDialog>
#include <QDebug>
#include <QAxWidget>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QPushButton>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    // 初始化QAxWidget控制元件框架相關
    _pAxWidget = new QAxWidget(this);
    _pAxWidget->setObjectName(QString::fromUtf8("axWidget"));
    _pAxWidget->setProperty("geometry", QVariant(QRect(0,0,1024,768)));
    // 繫結控制元件，下面使用UUID，共4種方式：UUID; Control's class name; Control's full name; from afile
    _pAxWidget->setControl(QString::fromUtf8("{d27cdb6e-ae6d-11cf-96b8-444553540000}"));
    _pAxWidget->hide();
    // 初始化QMediaPlayer框架相關
    _pVideoWidget = new QVideoWidget(this);
    _pMediaPlayer = new QMediaPlayer(this);
    _pMediaPlaylist = new QMediaPlaylist();
    _pMediaPlayer->setVideoOutput(_pVideoWidget);

    QVBoxLayout * pLayout = new QVBoxLayout();
    QHBoxLayout * pLayout2 = new QHBoxLayout();
    QPushButton * pPushButton = new QPushButton();
    pPushButton->setText("開啟播放檔案");
    connect(pPushButton, SIGNAL(clicked()), this, SLOT(btnClicked()));
    pLayout2->addStretch(1);
    pLayout2->addWidget(pPushButton);

    // 新增到總體佈局
    pLayout->addWidget(_pAxWidget, 1);
    pLayout->addWidget(_pVideoWidget, 1);
    pLayout->addLayout(pLayout2);
    ui->centralWidget->setLayout(pLayout);
}

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

void MainWindow::resizeEvent(QResizeEvent *)
{
    // 更新_pAxWidget內部控制元件的視窗持續大小
    _pAxWidget->setProperty("geometry", QVariant(_pAxWidget->rect()));
}

void MainWindow::btnClicked()
{
    QString path = QFileDialog::getOpenFileName(this, "開啟播放檔案", ".", "所有檔案(*.*)");
    if(path.isEmpty())
        return;
    // 目前只試過這幾種格式，window Media Player（window自帶播放器） 可播放的格式，都可以使用 _pAxWidget（com元件）播放
    if (path.right(4)==".swf"
            || path.right(5)==".rmvb"
            || path.right(4)==".mpg"
            || path.right(4)==".mp4")
    {
        if(path.right(4)==".swf")
        {
            _pAxWidget->dynamicCall("LoadMovie(int,const QString&)", 0, path);
            _pAxWidget->dynamicCall("Loop",false);
            _pAxWidget->show();
            _pVideoWidget->hide();
        }else
        {
            _pMediaPlaylist->clear();
            _pMediaPlaylist->addMedia(QUrl::fromLocalFile(path));
            _pMediaPlaylist->setCurrentIndex(0);
            _pMediaPlayer->setPlaylist(_pMediaPlaylist);
            _pMediaPlayer->play();
            _pVideoWidget->show();
            _pAxWidget->hide();
        }
    }
}