用QT制作本地视频播放器

mac2025-12-05 9

用QT制作本地视频播放器

先创建一个Qwidget工程在工程里第一行加上QT += core gui multimedia multimediawidgets sql

widget.H文件

#ifndef WIDGET_H #define WIDGET_H #include <QWidget> #include <QPushButton> #include <QMediaPlayer> #include <QVideoWidget> #include <QHBoxLayout> #include <QVBoxLayout> #include <QListWidget> #include <QDir> #include <QFile> #include <QFileDialog> #include <QFileInfo> #include <QSplitter> #include <QPalette> #include <QImage> #include <QSqlDatabase> #include <QSqlQuery> #include <QSqlError> #include <QCloseEvent> #include <QMessageBox> #include <QListWidgetItem> #include <QTime> #include <QSlider> #include <QDateTime> #include <QLabel> class Widget : public QWidget { Q_OBJECT public: Widget(QWidget *parent = 0); ~Widget(); private slots: void closeEvent(QCloseEvent *event); void List_file(); void Play(); void Pause(); void Del_file(); void Move(qint64 position); void seekChange(int position); private: QListWidget *list; QMediaPlayer *player; QVideoWidget *video; QSplitter *splitter; QSlider *Slider; QSqlDatabase db; QString name_file; QString dirname; QLabel *label; QPushButton *bt1; QPushButton *bt2; QPushButton *bt3; QPushButton *bt4; QPushButton *bt5; int flag=0; }; #endif // WIDGET_H

widget.cpp代码（main.cpp文件不用修改

#include "widget.h" Widget::Widget(QWidget *parent) : QWidget(parent) { this->setWindowTitle("爱奇艺"); this->setWindowIcon(QIcon(":/ico/aqy.bmp")); this->resize(QSize(700,500)); //设置Widget窗口初始大小 //创建数据库 db = QSqlDatabase::addDatabase("QSQLITE"); //添加sqlite驱动 db.setDatabaseName("my.db"); db.open(); QString mlist = "create table mlist(filename text,path text);"; db.exec(mlist); //添加水平布局器和垂直布局器 QHBoxLayout *hbox_1 = new QHBoxLayout; QHBoxLayout *hbox_2 = new QHBoxLayout; QVBoxLayout *vbox = new QVBoxLayout; //添加控件 list = new QListWidget(this); Slider = new QSlider(Qt::Horizontal); label = new QLabel(this); video = new QVideoWidget(this); //video->setMinimumSize(400,300); list->setMaximumWidth(200); this->setAutoFillBackground(true); //控制控件背景是否填充 video->setAutoFillBackground(true); QPalette palette_1; QPalette palette_2; palette_1.setColor(QPalette::Background,QColor(0,0,0)); //palette_1.setBrush(QPalette::Background,QBrush(QPixmap(":/ico/13.jpg"))); palette_2.setBrush(QPalette::Background,QBrush(QPixmap(":/ico/aqi1.bmp"))); video->setPalette(palette_2); this->setPalette(palette_1); player = new QMediaPlayer(this); //设置图片按钮 QIcon ico1(":/ico/china.png"); bt1 = new QPushButton(this); bt1->setIcon(ico1); bt1->setIconSize(QSize(50,50)); bt1->setFlat(true); //去掉按钮边框 bt1->setToolTip("添加文件"); //按钮标签 QIcon ico2(":/ico/zant.png"); bt2 = new QPushButton(this); bt2->setIcon(ico2); bt2->setIconSize(QSize(60,60)); bt2->setFlat(true); bt2->setToolTip("暂停"); QIcon ico3(":/ico/bo.png"); bt3 = new QPushButton(this); bt3->setIcon(ico3); bt3->setIconSize(QSize(80,80)); bt3->setFlat(true); //去掉按钮边框 bt3->setToolTip("播放"); //按钮标签 QIcon ico4(":/ico/Trash.png"); bt4 = new QPushButton(this); bt4->setIcon(ico4); bt4->setIconSize(QSize(50,50)); bt4->setFlat(true); bt4->setToolTip("删除文件"); hbox_1->addWidget(list); hbox_1->addWidget(video); hbox_2->addWidget(bt1); //把按钮放入布局器 hbox_2->addWidget(bt2); hbox_2->addWidget(bt3); hbox_2->addWidget(bt4); hbox_2->addWidget(Slider); hbox_2->addWidget(label); vbox->addLayout(hbox_1); vbox->addLayout(hbox_2); this->setLayout(vbox); //把布局器贴到界面 Slider = new QSlider(Qt::Horizontal);//把进度条贴到界面 connect(bt1,SIGNAL(clicked(bool)),this,SLOT(List_file())); connect(bt2,SIGNAL(clicked(bool)),this,SLOT(Pause())); connect(bt3,SIGNAL(clicked(bool)),this,SLOT(Play())); connect(bt4,SIGNAL(clicked(bool)),this,SLOT(Del_file())); connect(player,SIGNAL(positionChanged(qint64)),this,SLOT(updatePosition(qint64))); connect(Slider,SIGNAL(sliderMoved(int)),this,SLOT(seekchange(int))); //播放列表 QString sql = "select * from mlist;"; QSqlQuery query; if( query.exec(sql)){ qDebug()<<"显示列表"; } else{ qDebug()<<"显示失败"; } while( query.next() ){ QString file_name =QString( query.value("filename").toString() ); //转换类型 list->addItem(file_name); } } void Widget::List_file() { QString dirname = QFileDialog::getExistingDirectory(); //QString dirname = QFileDialog::getOpenFileName(); //打开文件对话框，获取打开的文件名 QDir dir(dirname); //定义QDir对象 QStringList filter; //设置过滤器 filter <<"*.mp3"<<"*.mp4"<<"*.flv"<<"*.avi"; /* QList <QString> lst; lst = dir.entryList(filter); //获取文件夹下的所有文件名 for(int i=0;i<lst.size();i++) { list->addItem(lst.at(i)); qDebug()<<lst.at(i); } */ QList <QFileInfo> lst; lst = dir.entryInfoList(filter); for(int i=0;i<lst.size();i++){ list->addItem(lst.at(i).fileName()); QString name = lst.at(i).fileName(); QString path = lst.at(i).absoluteFilePath(); QString sql = QString("insert into mlist values('%1','%2');").arg(name).arg(path); qDebug()<<sql; QSqlQuery query; if( query.exec(sql)){ qDebug()<<"插入数据库成功"; } else{ qDebug()<<"插入数据库失败"; } //qDebug()<<lst.at(i).absoluteFilePath()<<":"<<lst.at(i).size(); } } void Widget::Play() { QString filename; //选择文件播放 QListWidgetItem* item = list->currentItem(); //获取当前item name_file = item->text(); QString sql = QString("select * from mlist where filename='%1';").arg(name_file); QSqlQuery query; if(query.exec(sql)){ qDebug()<<"查询成功"; } else { qDebug()<<"查询失败"; } if( query.next()){ qDebug()<<"登录成功"; filename = query.value("path").toString(); } else{ qDebug()<<"登录失败"; } player->setMedia(QUrl::fromLocalFile(filename)); qDebug()<<"name:"<<filename; //显示视频 player->setVideoOutput(video); video->show(); player->play(); /* if(flag==1){ player->pause(); flag=0; } else if(flag==0){ player->play(); flag=1; } //player->play(); //qDebug()<<item->text(); */ } void Widget::Del_file() { QListWidgetItem* item = list->currentItem(); //获取当前item name_file = item->text(); QString sql = QString("delete from mlist where filename='%1';").arg(name_file); QSqlQuery query; if(query.exec(sql)){ qDebug()<<"删除成功"; } else { qDebug()<<"删除失败"; } delete item; } void Widget::Pause() { //停止 /* connect(bt2, SIGNAL(clicked()), video, SLOT(stop())); connect(bt2, SIGNAL(stateChanged(QMediaPlayer::State)), this, SLOT(OnStateChanged(QMediaPlayer::State))); bt2->setEnabled(false); */ if(player->state()==QMediaPlayer::PlayingState) { bt2->setToolTip("暂停"); player->pause(); } else { bt2->setToolTip("开始"); player->play(); } } //窗口关闭弹窗 void Widget::closeEvent(QCloseEvent *event) { //event->ignore(); if(QMessageBox::question(this,tr("Quit"),tr("你确定要退出这个应用吗？"),QMessageBox::Yes,QMessageBox::No) == QMessageBox::Yes){ event->accept(); } else { event->ignore(); } } void Widget::Move(qint64 position) { this->Slider->setMaximum(player->duration()/1000); this->Slider->setValue(position/1000); qint64 moved = position; QTime movetime(0,(moved/60000)%60,(moved/1000)%60); this->label->setText(movetime.toString("mm:ss")); } void Widget::seekChange(int position) //---------拖动进度条 { player->setPosition(position*1000); int moved = position*1000; QTime movetime(0,(moved/60000)%60,(moved/1000)%60); this->label->setText(movetime.toString("mm:ss")); } Widget::~Widget() { }

运行成功后的界面

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