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QT5杂谈（四）------Qt5中利用mplayer播放视频 [复制链接]

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离线青春岁月
侠客
 
只看楼主 倒序阅读 楼主  发表于: 2014-04-28
Qt5中利用mplayer播放视频，可以暂停，重播，上一个，下一个，循环播放！
showvideo.cpp
复制代码
  1. #include "showvideo.h"
  3. ShowVideo::ShowVideo(QWidget *parent,QListWidgetItem *item,QListWidget *list,QString path) :
  4.     QDialog(parent)
  5. {
  6.     //初始化窗口
  7.     this->resize(1024,768);
  8.     this->move(0,0);
  9.     this->setStyleSheet(tr("background-color: rgba(255,255,255,100%)"));
  10.     this->setWindowFlags(Qt::FramelessWindowHint);
  12.     //初始化状态信息
  13.     isFinish = false;
  14.     isPause = false;
  17.     //当前路径
  18.     currentPath = path;
  20.     //初始化图片数据
  21.     showList = list;
  22.     rowNum = showList->currentRow();
  23.     rowCount = showList->count();
  24.     currentItem = item;
  26.     //文件名
  27.     nameLabel = new QLabel(this);
  28.     nameLabel->move(60,720);
  29.     nameLabel->setText(currentItem->text());
  31.     //显示图像的QLabel
  32.     videoLabel = new QLabel(this);
  33.     videoLabel->setStyleSheet("background-color: rgb(0,0,0)");
  34.     videoLabel->move(10,10);
  35.     videoLabel->resize(1004,678);
  38.     //初始化进度条
  39.     bar = new QProgressBar(this);
  40.     bar->move(10,688);
  41.     bar->resize(1004,15);
  42.     bar->setMinimum(0);
  43.     bar->setMaximum(99);
  44.     bar->setTextVisible(true);
  45.     bar->setValue(0);
  47.     //设置return按钮属性
  48.     retBtn = new QPushButton(this);
  49.     retBtn->setIconSize(QSize(32,32));
  50.     retBtn->setIcon(QIcon(tr(":/images/return.ico")));
  51.     retBtn->resize(32,32);
  52.     retBtn->setStyleSheet(tr("border-radius:10px;"));
  53.     retBtn->setFocusPolicy(Qt::NoFocus);
  54.     retBtn->move(984,715);
  55.     connect(retBtn,SIGNAL(clicked()),this,SLOT(closeShowVideo()));
  58.     //设置player\pause按钮属性
  59.     startBtn = new QPushButton(this);
  60.     startBtn->setIconSize(QSize(32,32));
  61.     startBtn->setIcon(QIcon(tr(":/images/pause.ico")));
  62.     startBtn->resize(32,32);
  63.     startBtn->setStyleSheet("border-radius:10px;");
  64.     startBtn->setFocusPolicy(Qt::NoFocus);
  65.     startBtn->move(495,715);
  66.     connect(startBtn,SIGNAL(clicked()),this,SLOT(start_pauseVideo()));
  68.     //上一个视频按钮属性
  69.     forwardBtn = new QPushButton(this);
  70.     forwardBtn->setIconSize(QSize(32,32));
  71.     forwardBtn->setIcon(QIcon(tr(":/images/forward.ico")));
  72.     forwardBtn->resize(32,32);
  73.     forwardBtn->setStyleSheet(tr("background-color: rgba(50%,50%,50%,0%);border-radius:10px;"));
  74.     forwardBtn->setFocusPolicy(Qt::NoFocus);
  75.     forwardBtn->move(440,715);
  76.     connect(forwardBtn,SIGNAL(clicked()),this,SLOT(forwardVideo()));
  78.     //下一个视频按钮属性
  79.     nextBtn = new QPushButton(this);
  80.     nextBtn->setIconSize(QSize(32,32));
  81.     nextBtn->setIcon(QIcon(tr(":/images/next.ico")));
  82.     nextBtn->resize(32,32);
  83.     nextBtn->setStyleSheet(tr("background-color: rgba(50%,50%,50%,0%);border-radius:10px;"));
  84.     nextBtn->setFocusPolicy(Qt::NoFocus);
  85.     nextBtn->move(550,715);
  86.     connect(nextBtn,SIGNAL(clicked()),this,SLOT(nextVideo()));
  88.     //删除图片按钮属性
  89.     deleteBtn = new QPushButton(this);
  90.     deleteBtn->setIconSize(QSize(32,32));
  91.     deleteBtn->setIcon(QIcon(tr(":/images/delete.ico")));
  92.     deleteBtn->resize(32,32);
  93.     deleteBtn->setStyleSheet(tr("background-color: rgba(50%,50%,50%,0%);border-radius:10px;"));
  94.     deleteBtn->setFocusPolicy(Qt::NoFocus);
  95.     deleteBtn->move(20,715);
  96.     connect(deleteBtn,SIGNAL(clicked()),this,SLOT(deleteVideo()));
  98.     //初始化进程
  99.     play_process = new QProcess(this);
  100.     play_process->setProcessChannelMode(QProcess::MergedChannels);
  101.     connect(play_process,SIGNAL(readyReadStandardOutput()),this,SLOT(getVideoInfo()));
  104.     //定时获取播放进度
  105.     timer = new QTimer(this);
  106.     connect(timer,SIGNAL(timeout()),this,SLOT(sendPosCmd()));
  108.     playVideo(currentPath + currentItem->text());
  109. }
  111. //获取视频信息
  112. void ShowVideo::getVideoInfo()
  113. {
  114.     while(play_process->canReadLine())
  115.     {
  116.         QString message(play_process->readLine());
  117.         if(message.left(21) == tr("ANS_PERCENT_POSITION="))
  118.         {
  119.             bar->setValue(message.remove(0,21).toInt(NULL,10));
  120.         }
  121.         //message即为读取的信息我们可以根据需要取我们要的信息如
  122.         //文件总时间为：ANS_LENGTH=23.00
  123.         //当前时间为：ANS_TIME_POSITION=23.00
  124.     }
  125. }
  127. //播放视频
  128. void ShowVideo::playVideo(QString fileName)
  129. {
  130.     QString str;
  131.     str = tr("mplayer -slave -quiet -fps 15 ");
  132.     str.append(fileName);
  133.     str.append(tr(" -wid "));
  134.     str.append(QString::number(videoLabel->winId()));
  135.     play_process->start(str,QIODevice::ReadWrite);
  136.     connect(play_process,SIGNAL(finished(int)),this,SLOT(getFinishStatus(int)));
  137.     timer->start(30);
  138.     nameLabel->setText(fileName.right(16));
  139.     isFinish = false;
  140. }
  143. //获取播放进度百分比的命令
  144. void ShowVideo::sendPosCmd()
  145. {
  146.     play_process->write("get_percent_pos\n");
  147. }
  149. //获取播放完成的状态
  150. void ShowVideo::getFinishStatus(int status)
  151. {
  152.     if(status == 0)
  153.     {
  154.         bar->setValue(0);
  155.         timer->stop();
  156.         play_process->close();
  158.         isFinish = true;
  159.         startBtn->setIcon(QIcon(tr(":/images/start.ico")));
  160.         isPause = true;
  161.     }
  162. }
  164. //开始\暂停\重播 播放
  165. void ShowVideo::start_pauseVideo()
  166. {
  167.     if(isPause == false)
  168.     {
  169.         timer->stop();
  170.         startBtn->setIcon(QIcon(tr(":/images/start.ico")));
  171.         isPause = true;
  172.         play_process->write("pause\n");
  174.     }else
  175.     {
  176.         startBtn->setIcon(QIcon(tr(":/images/pause.ico")));
  177.         isPause = false;
  179.         if(!isFinish)
  180.         {
  181.             timer->start(30);
  182.             play_process->write("pause\n");
  184.         }else
  185.         {
  186.             this->playVideo(currentPath + showList->item(rowNum)->text());
  187.         }
  188.     }
  189. }
  192. //播放上一个视频
  193. void ShowVideo::forwardVideo()
  194. {
  195.     QListWidgetItem *item;
  197.     bar->setValue(0);
  198.     timer->stop();
  199.     play_process->close();
  201.     startBtn->setIcon(QIcon(tr(":/images/pause.ico")));
  202.     isPause = false;
  204.     if(rowNum == 0)
  205.     {
  206.         rowNum = rowCount - 1;
  207.         item = showList->item(rowNum);
  208.         this->playVideo(currentPath + item->text());
  209.         return;
  210.     }
  212.     rowNum--;
  214.     item = showList->item(rowNum);
  215.     this->playVideo(currentPath + item->text());
  216.     return;
  217. }
  219. //播放下一个视频
  220. void ShowVideo::nextVideo()
  221. {
  222.     QListWidgetItem *item;
  224.     bar->setValue(0);
  225.     timer->stop();
  226.     play_process->close();
  228.     startBtn->setIcon(QIcon(tr(":/images/pause.ico")));
  229.     isPause = false;
  231.     if(rowNum == rowCount - 1)
  232.     {
  233.         rowNum = 0;
  234.         item = showList->item(rowNum);
  235.         this->playVideo(currentPath + item->text());
  237.         return;
  238.     }
  240.     rowNum++;
  242.     item = showList->item(rowNum);
  243.     this->playVideo(currentPath + item->text());
  244. }
  247. //删除视频文件
  248. void ShowVideo::deleteVideo()
  249. {
  250.     int ret;
  251.     QListWidgetItem *item;
  253.     ret = QMessageBox::warning(this,NULL,
  254.                                tr("是否删除").append(showList->item(rowNum)->text()).append(tr("?")),
  255.                                QMessageBox::Yes | QMessageBox::No);
  256.     if(ret == QMessageBox::Yes)
  257.     {
  258.         QFile::remove(currentPath + showList->item(rowNum)->text());
  259.         showList->removeItemWidget(showList->item(rowNum));
  261.         //删除item
  262.         item = showList->takeItem(rowNum);
  263.         showList->removeItemWidget(item);
  264.         delete item;
  266.         rowCount--;
  268.         if(rowCount == 0)
  269.         {
  270.             bar->setValue(0);
  271.             timer->stop();
  272.             play_process->close();
  274.             startBtn->setIcon(QIcon(tr(":/images/start.ico")));
  275.             isPause = true;
  277.             videoLabel->setStyleSheet(tr("background-color: rgba(255,255,255,255)"));
  279.             nameLabel->setText("");
  281.             return;
  282.         }
  284.         if(rowNum == rowCount)
  285.         {
  286.             rowNum = rowCount - 1;
  287.         }
  289.         item = showList->item(rowNum);
  291.         bar->setValue(0);
  292.         timer->stop();
  293.         play_process->close();
  295.         startBtn->setIcon(QIcon(tr(":/images/pause.ico")));
  296.         isPause = false;
  297.         playVideo(currentPath + item->text());
  298.     }
  299. }
  300. //返回上一级
  301. void ShowVideo::closeShowVideo()
  302. {
  303.     timer->stop();
  304.     play_process->close();
  305.     emit quitApp();
  306.     this->close();
  307. }
go!   go!  go!  go!
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离线自强不吸
侠客
只看该作者 1楼 发表于: 2014-05-06
楼主上个效果图瞅瞅啊
自强不吸！
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离线玩意儿
新手上路
只看该作者 2楼 发表于: 2014-11-03
我想问一下怎样双击视频文件时自动打开视频播放程序并播放？？？
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离线slf0205
新手上路
只看该作者 3楼 发表于: 2014-11-05
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离线bb1994525
新手上路
只看该作者 4楼 发表于: 2014-11-15
最近在学习视频播放器，楼主能不能把这个文件的完整工程上传一下？交流学习？或者发我邮箱也可： bb1994525@126.com  希望您能及时看到，谢谢！
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