qt实现简单的视频播放器

1、界面展示

2、功能简介

视频播放器的功能主要有打开文件添加视频、暂停/播放，上一个/下一页，改变音量、进度条等

3、实现思路

1、打开视频（QFielDialog）
一下选择多个视频，用QFileDialog::getOpenFileNames实现，将文件放到一个数据成员QStringlist中，使用QFileInfo info获取详细信息，filename()获取名字，再将之添加到listWidget中
2、视频列表（QlistWidget）
使用QFileInfo info获取详细信息，filename()获取名字，再将之添加到listWidget中。
3、暂停/继续（QMediaPlayer）
mediaPlayer play/[pause进行播放/暂停，记得修改图标
4、上一个/下一个（QFileInfo）
将下标修改，然后重新播放，需要重新设置媒体源
5、快退快进（QSlider）
修改进度条的value
6、截图
QScreen
9、播放顺序（QComboBox）
根据播放模式的不同。对下标进行对应的处理
10、进度条（QSlider）
时间/声音，可以滑动，修改value值
11、显示名字（QLineEdit）
滚动显示视频名字做的时候是做了一个服务器端（Linux），一个客户端（QT），用到服务器的地方主要是登录注册以及查看历史观看的地方，只实现视频播放器的话不需要用到服务器端。

4、部分代码

#include "widget.h"
#include "ui_widget.h"
#include "clientwinmanager.h"
#include <QHostAddress>
static int socket_flag = 0;
QTcpSocket *Widget::tcpSocket = nullptr;
Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget)
{ui->setupUi(this);this->setWindowTitle("ZZH视频播放器");this->setWindowIcon(QIcon(":/image/太空兔.png"));//创建定时器对象this->timer = new QTimer(this);this->timer2 = new QTimer(this);this->timer2->start(1000);this->resize(1280,720);//实例化媒体播放器及视频播放this->mediaPlayer = new QMediaPlayer(this);this->videoWidget = new QVideoWidget(this);//实例化布局this->vbox = new QVBoxLayout(this);this->vbox1 = new QVBoxLayout(this);this->setLayout(this->vbox);//设置整个窗口为垂直布局this->hbox1 = new QHBoxLayout(this);this->hbox2 = new QHBoxLayout(this);this->hbox3 = new QHBoxLayout(this);this->hbox4 = new QHBoxLayout(this);this->hbox5 = new QHBoxLayout(this);//实例化按钮this->openBtn = new QPushButton("打开",this);this->preBtn = new QPushButton("上一个",this);this->rewindBtn = new QPushButton("快退",this);this->playBtn = new QPushButton("播放",this);this->playBtn->setIcon(this->style()->standardIcon(QStyle::SP_MediaPlay));this->forwardBtn = new QPushButton("快进",this);this->nextBtn = new QPushButton("下一个",this);this->shotBtn = new QPushButton("截图",this);this->loginBtn = new QPushButton("登录",this);this->loginBtn->setMaximumWidth(100);this->historyBtn = new QPushButton("历史",this);this->historyBtn->setMaximumWidth(100);//实例化标签this->timeLable = new QLabel("00:00:00/00:00:00",this);this->volumeLabel = new QLabel("50",this);this->volumeLabel->setMaximumWidth(200);this->videoNameLabel = new QLabel("未播放",this);this->userNameLabel = new QLabel("未登录",this);//this->playLabel = new QLabel("无视频",this);//实例化进度条this->timeSlider = new QSlider(this);this->volumeSlider = new QSlider(this);this->volumeSlider->setOrientation(Qt::Horizontal);this->timeSlider->setOrientation(Qt::Horizontal);this->volumeSlider->setMaximumWidth(200);this->volumeSlider->setRange(-1,101);this->volumeSlider->setValue(50);//实例化listWidgetthis->listWidget = new QListWidget(this);this->listWidget->setMaximumWidth(300);this->listWidget->setMinimumWidth(300);// this->playWidget = new QListWidget(this);//this->videoWidget->setGeometry(50,50,720,480);//this->playWidget->setGeometry(50,40,720,480);// this->videoWidget->setMinimumSize(this->playWidget->width(),this->playWidget->height());//实例化下拉框this->comboBox = new QComboBox(this);this->comboBox->addItem("顺序播放");this->comboBox->addItem("随机播放");this->comboBox->addItem("循环播放");//实例化lcdthis->lcdNumber = new QLCDNumber(this);this->lcdNumber->setDigitCount(8);this->lcdNumber->setStyleSheet("background-color: green");//修改背景connect(this->timer2,SIGNAL(timeout()),this,SLOT(updateTime()));this->inde = 0;this->n = 0;this->dis_flag = 0;this->his_flag = 0;//进行布局this->hbox1->addWidget(this->videoNameLabel);this->hbox1->addWidget(this->lcdNumber);this->hbox1->addWidget(this->userNameLabel);this->hbox1->addWidget(this->historyBtn);this->hbox1->addWidget(this->loginBtn);//this->hbox1->addWidget(this->testBtn);this->hbox2->addStretch();this->hbox2->addLayout(this->vbox1);//this->hbox2->addWidget(this->playWidget);this->hbox2->addWidget(this->listWidget);this->hbox3->addWidget(this->timeLable);this->hbox3->addWidget(this->volumeLabel);this->hbox4->addWidget(this->timeSlider);this->hbox4->addWidget(this->volumeSlider);this->hbox5->addWidget(this->openBtn);this->hbox5->addWidget(this->preBtn);this->hbox5->addWidget(this->rewindBtn);this->hbox5->addWidget(this->playBtn);this->hbox5->addWidget(this->forwardBtn);this->hbox5->addWidget(this->nextBtn);this->hbox5->addWidget(this->shotBtn);this->hbox5->addWidget(this->comboBox);//垂直布局this->vbox->addLayout(this->hbox1);this->vbox->addLayout(this->hbox2);this->vbox->addLayout(this->hbox3);this->vbox->addLayout(this->hbox4);this->vbox->addLayout(this->hbox5);//关联connect(this->loginBtn,SIGNAL(clicked()),this,SLOT(do_loginBtn())); //登录connect(this->openBtn,SIGNAL(clicked()),this,SLOT(do_openBtn())); //打开文件connect(this->playBtn,SIGNAL(clicked()),this,SLOT(do_playBtn())); //播放/暂停connect(this->preBtn,SIGNAL(clicked()),this,SLOT(do_preBtn())); //上一首connect(this->nextBtn,SIGNAL(clicked()),this,SLOT(do_nextBtn())); //下一首connect(this->mediaPlayer,SIGNAL(positionChanged(qint64)),this,SLOT(updateTimeSlider(qint64))); //进度条变化connect(this->mediaPlayer,SIGNAL(durationChanged(qint64)),this,SLOT(setTimeSlider(qint64)));connect(this->timer,SIGNAL(timeout()),this,SLOT(updateTime_NameShow())); //滚动显示名字、显示歌曲已播放时间/总时间connect(this->rewindBtn,SIGNAL(clicked()),this,SLOT( do_rewindBtn())); //快退connect(this->forwardBtn,SIGNAL(clicked()),this,SLOT( do_forwardBtn()));//快进connect(this->listWidget,SIGNAL(itemDoubleClicked(QListWidgetItem*)),this,SLOT(doubleClickPlay(QListWidgetItem*)));//双击播放connect(this->volumeSlider,SIGNAL(sliderMoved(int)),this,SLOT(updateVolume(int))); //音量调节connect(this->historyBtn,SIGNAL(clicked()),this,SLOT(do_historyBtn())); //查看历史connect(this->shotBtn,SIGNAL(clicked()),this,SLOT(do_shotBtn())); //截图//connect(this->testBtn,SIGNAL(clicked()),this,SLOT(do_testBtn()));//通信}Widget::~Widget()
{delete ui;
}void Widget::setName(QString name)
{this->userNameLabel->setText(name);this->loginBtn->setText("登出");
}void Widget::updateTime()
{//获取当前时间并转换成QstringQString currentTime = QDateTime::currentDateTime().toString("hh:mm:ss");//更新lcd时间this->lcdNumber->display(currentTime);}
//登录
#include <QMessageBox>
void Widget::do_loginBtn()
{if(this->loginBtn->text() == "登录"){//1、切换到登录界面this->tcpSocket = new QTcpSocket(this);//每次登录得时候实例化套接字connect(this->tcpSocket, SIGNAL(connected()), this, SLOT(connectedSlot()));clientWinManager *p = clientWinManager::getClientWin();this->close();p->loginWin->show();//2、连接服务器并提示if(socket_flag == 0){this->tcpSocket->connectToHost(QHostAddress("192.168.206.212"), 9999);socket_flag = 1;}}else if (this->loginBtn->text() == "登出") {socket_flag = 0;this->loginBtn->setText("登录");this->userNameLabel->setText("未登录");//断开,拼接字符串，发给服务器char str[100] = {'\0'};sprintf(str,"dis");Widget::tcpSocket->write(str);this->tcpSocket->disconnectFromHost();this->tcpSocket = nullptr;//bug，断开之后不能重新连接QMessageBox::information(this,"tips","退出，断开服务器");}
}
//打开视频文件
#include <QFileDialog>
void Widget::do_openBtn()
{this->nameList.clear();this->listWidget->clear();//清空表单this->nameList = QFileDialog::getOpenFileNames(this,"select",".","MKV(*.mkv)");if(nameList.size() == 0){return;}for(int i = 0;i < nameList.size();i++)  //循环的将选中的文件加入到listWidget{QFileInfo info(nameList.at(i));QListWidgetItem *item = new QListWidgetItem(info.fileName(),this->listWidget);this->listWidget->addItem(item);item->setToolTip(nameList.at(i));//----------}QString fileName = nameList.at(0);//默认播放打开的第一个视频this->mediaPlayer->setMedia(QUrl(fileName));//设置媒体源QFileInfo info(fileName);//获取文件全部信息this->videoName = info.fileName() + "      ";this->videoNameLabel->setText(this->videoName);this->mediaPlayer->setVolume(50);//设置音量this->vbox1->addWidget(this->videoWidget);this->mediaPlayer->setVideoOutput(this->videoWidget);//this->mediaPlayer->setVideoOutput(this->videoWidget);this->mediaPlayer->play();this->timer->start(1000);this->playBtn->setIcon(this->style()->standardIcon(QStyle::SP_MediaPause));if(this->userNameLabel->text() != "未登录"){//有用户登录，将该用户看过的视频存放到数据库//先转换类型char str[100] = {'\0'};QByteArray userName = this->userNameLabel->text().toLatin1();//用户名QByteArray vidName = this->videoName.toLatin1(); //视频名字sprintf(str,"His#%s#%s",userName.data(),vidName.data()); //拼接字符串qDebug() << videoName.data();Widget::tcpSocket->write(str);}
}
//播放/暂停
void Widget::do_playBtn()
{int state = this->mediaPlayer->state();if(state == QMediaPlayer::PlayingState){//正在播放,暂停播放，图标修改成播放this->mediaPlayer->pause();this->playBtn->setText("播放");this->playBtn->setIcon(this->style()->standardIcon(QStyle::SP_MediaPlay));}else if (state == QMediaPlayer::PausedState) {//暂停,继续播放，图标修改为暂停this->mediaPlayer->play();this->playBtn->setText("暂停");this->playBtn->setIcon(this->style()->standardIcon(QStyle::SP_MediaPause));}
}
//上一个
void Widget::do_preBtn()
{this->inde--;if(this->inde < 0){this->inde = this->nameList.size() - 1;}this->mediaPlayer->stop();QFileInfo fileName(this->nameList.at(this->inde));//获取文件信息this->mediaPlayer->setMedia(QUrl(this->nameList.at(this->inde)));//设置媒体源this->videoNameLabel->setText(fileName.fileName());//修改标题this->mediaPlayer->setVideoOutput(this->videoWidget);this->videoName = fileName.fileName();this->mediaPlayer->play();this->timer->start(1000);if(this->userNameLabel->text() != "未登录"){//有用户登录，将该用户看过的视频存放到数据库//先转换类型char str[100] = {'\0'};QByteArray userName = this->userNameLabel->text().toLatin1();//用户名QByteArray vidName = fileName.fileName().toLatin1(); //视频名字sprintf(str,"His#%s#%s",userName.data(),vidName.data()); //拼接字符串Widget::tcpSocket->write(str);}
}
//下一个
void Widget::do_nextBtn()
{this->inde++;if(this->inde > this->nameList.size() - 1){this->inde = 0;}this->mediaPlayer->stop();QFileInfo fileName(this->nameList.at(this->inde));//获取文件信息this->mediaPlayer->setMedia(QUrl(this->nameList.at(this->inde)));//设置媒体源this->videoNameLabel->setText(fileName.fileName());//修改标题this->mediaPlayer->setVideoOutput(this->videoWidget);this->videoName = fileName.fileName();this->mediaPlayer->play();this->timer->start(1000);if(this->userNameLabel->text() != "未登录"){//有用户登录，将该用户看过的视频存放到数据库//先转换类型char str[100] = {'\0'};QByteArray userName = this->userNameLabel->text().toLatin1();//用户名QByteArray vidName = fileName.fileName().toLatin1(); //视频名字sprintf(str,"His#%s#%s",userName.data(),vidName.data()); //拼接字符串Widget::tcpSocket->write(str);}
}//给进度条设置范围
void Widget::setTimeSlider(qint64 duration)
{this->timeSlider->setRange(0,int(duration));
}
//根据视频播放的位置修改进度条
void Widget::updateTimeSlider(qint64 position)
{this->timeSlider->setValue(int(position));
}//滚动显示名字、修改文本时间
//实现播放模式
#include <QFileInfo>
void Widget::updateTime_NameShow()
{/*根据n的值显示内容*/this->n++;if(this->n == this->videoName.size()){this->n = 0;}this->videoNameLabel->setText(this->videoName.mid(this->n));//滚动显示//获取总时间跟当前播放时长qint64 dur = this->mediaPlayer->duration();qint64 pos = this->mediaPlayer->position();//实例化两个对象，用来显示QTime durTime(0,0,0);QTime posTime(0,0,0);this->timeLable->setText(posTime.addMSecs(int(pos)).toString("mm:ss") + "/" + durTime.addMSecs(int(dur)).toString("mm:ss"));//根据播放模式进行播放/** 1、顺序播放，下标++，最后一首的时候，下标置为0（dur == pos的时候结束）* 2、随机播放，qrand()给下标一个随机值* 3、循环播放，下表不变*/if(dur == pos){if(this->comboBox->currentText() == "顺序播放"){this->inde++;if(this->inde > this->nameList.size() - 1){this->inde = 0;}}else if (this->comboBox->currentText() == "随机播放") {this->inde = qrand() % this->nameList.size();}else if (this->comboBox->currentText() == "循环播放"){this->inde = this->inde+0;}// 开始播放（）QFileInfo fileName(this->nameList.at(this->inde));//获取文件信息this->mediaPlayer->setMedia(QUrl(this->nameList.at(this->inde)));//设置媒体源this->videoNameLabel->setText(fileName.fileName());//修改标题this->mediaPlayer->setVideoOutput(this->videoWidget);this->mediaPlayer->play();this->timer->start(1000);}
}
//快退，播放时间减少5s
#include <QMessageBox>
void Widget::do_rewindBtn()
{//判断当前播放时间是否小于5s//判断完之后要修改文本、滑动块，//获取总时间跟当前播放时长qint64 dur = this->mediaPlayer->duration();qint64 pos = this->mediaPlayer->position();//实例化两个对象，用来显示qDebug() << int(pos);QTime durTime(0,0,0);QTime posTime(0,0,0);if(int(pos) <= 5000){this->timeSlider->setValue(0);this->mediaPlayer->setPosition(0);this->timeLable->setText(posTime.addMSecs(0).toString("mm:ss") + "/" + durTime.addMSecs(int(dur)).toString("mm:ss"));}else {this->timeSlider->setValue(int(pos) - 5000);this->mediaPlayer->setPosition(int(pos) - 5000);this->timeLable->setText(posTime.addMSecs(int(pos)-5000).toString("mm:ss") + "/" + durTime.addMSecs(int(dur)).toString("mm:ss"));}
}
//快进
void Widget::do_forwardBtn()
{//判断剩余播放时间是否小于5s//获取总时间跟当前播放时长qint64 dur = this->mediaPlayer->duration();qint64 pos = this->mediaPlayer->position();//实例化两个对象，用来显示QTime durTime(0,0,0);QTime posTime(0,0,0);if(int(dur)-int(pos) <=5000){this->timeSlider->setValue(int(dur));this->mediaPlayer->setPosition(int(dur));this->timeLable->setText(posTime.addMSecs(int(dur)).toString("mm:ss") + "/" + durTime.addMSecs(int(dur)).toString("mm:ss"));}else {this->timeSlider->setValue(int(pos) + 5000);this->mediaPlayer->setPosition(int(pos) + 5000);this->timeLable->setText(posTime.addMSecs(int(pos)+5000).toString("mm:ss") + "/" + durTime.addMSecs(int(dur)).toString("mm:ss"));}
}
void Widget::doubleClickPlay(QListWidgetItem *item)//参数为双击的目标信息
{/** 1、获取listWidget中下标位置2、设置媒体源、播放选中的歌曲3、修改名字4、修改图标5、定时器启动*/this->inde = this->listWidget->currentRow(); //获取当前下标this->mediaPlayer->setMedia(QUrl(item->toolTip()));this->videoNameLabel->setText(item->text());this->videoName = item->text();qDebug() << videoName;this->mediaPlayer->play();this->timer->start(1000);this->playBtn->setIcon(this->style()->standardIcon(QStyle::SP_MediaPause));if(this->userNameLabel->text() != "未登录"){//有用户登录，将该用户看过的视频存放到数据库//先转换类型char str[100] = {'\0'};QByteArray userName = this->userNameLabel->text().toLatin1();//用户名QByteArray vidName = item->text().toLatin1(); //视频名字sprintf(str,"His#%s#%s",userName.data(),vidName.data()); //拼接字符串qDebug() << userName.data();Widget::tcpSocket->write(str);}
}//修改音量
#include <string.h>
void Widget::updateVolume(int positoin)
{this->mediaPlayer->setVolume(positoin); //修改媒体音量// strcat("音量：",this->volumeSlider->value());int i = this->volumeSlider->value();this->volumeLabel->setText(QString::number(i)); //将int转换成对应的类型，修改文本
}void Widget::do_historyBtn()
{//用户只有才能查看观看历史，没登录提示用户登录if(this->userNameLabel->text() == "未登录"){QMessageBox::warning(this,"tips","请先登录");}else {//获取历史记录，存放到listWidget中//先获取有几条记录，再循环的获取具体信息，先清空，通过addItem加//先给服务器端发送要接收历史记录的消息if(this->his_flag == 0){this->his_flag = 1;char str[100] = {'\0'};QByteArray userName = this->userNameLabel->text().toLatin1();//用户名sprintf(str,"Get#%s",userName.data());connect(Widget::tcpSocket,SIGNAL(readyRead()),this,SLOT(readData()));Widget::tcpSocket->write(str);}}
}
//截图
#include <QScreen>
void Widget::do_shotBtn()
{qDebug()<<"shot";QScreen *screen = QGuiApplication::primaryScreen();//拼接图片的名字QString filePathName = "cut-";filePathName += QDateTime::currentDateTime().toString("yyyy-MM-dd hh-mm-ss-zzz");filePathName += ".png";QPixmap pixmap = screen->grabWindow(0);if(!pixmap.save(filePathName,"png")){qDebug()<<"cut save png failed"<<endl;}QRect geo = this->geometry();QRect appGeo = geo; // 整个应用程序在图片中的位置。geo = this->videoWidget->geometry(); // 播放视频在图片中的位置。QRect copyGeo;copyGeo.setX(geo.x() + appGeo.x() ); // x=三个x相加copyGeo.setY(geo.y() + appGeo.y() );copyGeo.setWidth(geo.width());copyGeo.setHeight(geo.height());QPixmap pixmapCopy = pixmap.copy(copyGeo); // copy图片filePathName.prepend("Copy+");if(pixmapCopy.save(filePathName,"png")){QMessageBox::information(this,"tips","截取成功");}
}
//接收消息
void Widget::readData()
{//接收历史观看，一行一行显示，以#分割if(this->his_flag == 1){QByteArray recv = Widget::tcpSocket->read(128); //读取数据QString str = QString(recv);//格式转换，重新走下构造qDebug()<< recv;//先获取数据的数量QStringList list = str.split('#');int size = str.split("#").at(0).toInt();this->listWidget->clear();//清空之前显示的内容//以#分割开for(int i = 1;i <= size;i++){QString chr = list[i];this->listWidget->addItem(chr);}this->his_flag = 0;}
}//连接服务器端
void Widget::connectedSlot(){QMessageBox::information(this,"tips","连接服务器成功");
}

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1、界面展示

2、功能简介

3、实现思路

4、部分代码

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