1

我编写了一个程序，该程序应该使用 QT 显示视频和音频。但是我无法弄清楚为什么视频没有播放，而音频工作正常。

vidpb.pro

QT       += core gui multimedia multimediawidgets

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = vidpb
TEMPLATE = app


SOURCES += main.cpp\
        mainwindow.cpp

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui

CONFIG += mobility
MOBILITY = multimedia

主窗口.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class QMediaPlayer;
class QVideoWidget;

class MainWindow : public QMainWindow
{
    Q_OBJECT
    QMediaPlayer *player;
    QVideoWidget *widget;

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

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

主窗口.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QMediaPlayer>
#include <QVideoWidget>
#include <QtMultimedia>
#include <qvideowidget.h>
#include "qmediaplayer.h"

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

    player = new QMediaPlayer(this);
    player->setMedia(QUrl::fromLocalFile("/sdcard/Movies/video1.mp4"));

    widget = new QVideoWidget(this);
    player->setVideoOutput(widget);
    widget->show();

    setCentralWidget(widget);
    this->show();
    player->play();
}

MainWindow::~MainWindow()
{
    delete ui;
}
4

0 回答 0