利用qt和ffmpeg以及opengl实现简单的视频播放器的头文件和源代码

以下是一个基本的视频播放器的头文件和源代码，使用了Qt、FFmpeg和OpenGL：

头文件 VideoPlayer.h：

#ifndef VIDEOPLAYER_H
#define VIDEOPLAYER_H

#include <QtWidgets/QMainWindow>
#include <QtAV/AVPlayer.h>
#include <QtAV/VideoOutput.h>
#include <QOpenGLWidget>

class VideoPlayer : public QMainWindow
{
    Q_OBJECT

public:
    VideoPlayer(QWidget *parent = nullptr);
    ~VideoPlayer();

private slots:
    void on_playButton_clicked();
    void on_pauseButton_clicked();
    void on_positionChanged(qint64 position);

private:
    Ui::VideoPlayerClass ui;
    QtAV::AVPlayer *m_player;
    QtAV::VideoOutput *m_videoOutput;
    QOpenGLWidget *m_glWidget;
    QSlider *m_positionSlider;
};

#endif // VIDEOPLAYER_H

源文件 VideoPlayer.cpp：

#include "VideoPlayer.h"
#include "ui_VideoPlayer.h"

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

    // 创建AVPlayer
    m_player = new QtAV::AVPlayer(this);

    // 创建VideoOutput
    m_videoOutput = new QtAV::VideoOutput(this);
    m_glWidget = new QOpenGLWidget(this); // 创建QOpenGLWidget
    m_videoOutput->setOutputWidget(m_glWidget);

    // 设置播放器的输出设备
    m_player->setRenderer(m_videoOutput);

    // 连接信号和槽
    connect(m_player, SIGNAL(positionChanged(qint64)), this, SLOT(on_positionChanged(qint64)));

    // 设置进度条的范围
    m_positionSlider = new QSlider(Qt::Horizontal);
    m_positionSlider->setRange(0, 0);

    // 将控件添加到窗口中
    ui->videoLayout->addWidget(m_glWidget);
    ui->controlLayout->addWidget(m_positionSlider);
}

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

void VideoPlayer::on_playButton_clicked()
{
    m_player->play();
}

void VideoPlayer::on_pauseButton_clicked()
{
    m_player->pause();
}

void VideoPlayer::on_positionChanged(qint64 position)
{
    m_positionSlider->setRange(0, m_player->duration());
    m_positionSlider->setValue(position);
}

以上代码只是一个简单的框架，你需要根据自己的需求进行修改和扩展。同时，你需要在.pro文件中添加以下依赖：

QT += widgets
QT += opengl
LIBS += -lQtAV
LIBS += -lavcodec
LIBS += -lavformat
LIBS += -lavutil
LIBS += -lswscale