• Qt ffmpeg音视频转换工具

    Qt ffmpeg音视频转换工具，QProcess方式调用ffmpeg，对音视频文件进行格式转换，支持常见的音视频格式，主要在于QProcess的输出处理以及转换的文件名和后缀的处理，可以进一步加上音视频剪切合并和音视频文件属性查询修改的功能。

    1. #include "mainwindow.h"
    2. #include "ui_mainwindow.h"
    3. #include 
    4. #include 
    5. #include 
    6. #include 
    7.  
    8. MainWindow::MainWindow(QWidget *parent) :
    9.     QMainWindow(parent),
    10.     ui(new Ui::MainWindow)
    11. {
    12.     ui->setupUi(this);
    13.     QFont font;
    14.     font.setPixelSize(16);
    15.     setFont(font);
    16.  
    17.     setWindowTitle(QStringLiteral("ffmpeg工具"));
    18.  
    19.     ui->listWidget->setMaximumWidth(200);
    20.     connect(ui->listWidget, SIGNAL(clicked(QModelIndex)), this, SLOT(convert()));
    21.  
    22.     ui->checkBox->setChecked(true);
    23.  
    24.     mProcess = new QProcess;
    25.     connect(mProcess, SIGNAL(readyReadStandardError()), this, SLOT(readError()));
    26.     connect(mProcess, SIGNAL(readyReadStandardOutput()), this, SLOT(readOutput()));
    27.     connect(mProcess, SIGNAL(finished(int,QProcess::ExitStatus)), this, SLOT(finished(int,QProcess::ExitStatus)));
    28.  
    29.     mTimer = new QTimer(this);
    30.     connect(mTimer, SIGNAL(timeout()), this, SLOT(updateTimer()));
    31.     mTimer->start(1000);
    32.  
    33.     initListWidget();
    34. }
    35.  
    36. MainWindow::~MainWindow()
    37. {
    38.     delete ui;
    39. }
    40.  
    41. void MainWindow::readError()
    42. {
    43.     QString str = mProcess->readAllStandardError().data();
    44.  
    45.     if (str == "\r")
    46.     {
    47.         ui->textBrowser->append(mTmpStr);
    48.         mTmpStr.clear();
    49.     }
    50.     else
    51.     {
    52.         mTmpStr += str;
    53.         if (str.contains("\r\n"))
    54.         {
    55.             ui->textBrowser->append(mTmpStr);
    56.             mTmpStr.clear();
    57.         }
    58.     }
    59. }
    60.  
    61. void MainWindow::readOutput()
    62. {
    63.     QByteArray qba = mProcess->readAllStandardOutput();
    64.     QTextCodec* tc = QTextCodec::codecForName("System");
    65.     QString str = tc->toUnicode(qba);
    66.  
    67.     if (str == "\r")
    68.     {
    69.         ui->textBrowser->append(mTmpStr);
    70.         mTmpStr.clear();
    71.     }
    72.     else
    73.     {
    74.         mTmpStr += str;
    75.         if (str.contains("\r\n"))
    76.         {
    77.             ui->textBrowser->append(mTmpStr);
    78.             mTmpStr.clear();
    79.         }
    80.     }
    81. }
    82.  
    83. void MainWindow::finished(int exitCode, QProcess::ExitStatus exitStatus)
    84. {
    85.     ui->textBrowser->append(QStringLiteral("finished : %1 %2").arg(exitCode).arg(exitStatus));
    86.     mProcess->close();
    87.  
    88.     if (exitCode == 0 && exitStatus == 0)
    89.     {
    90.         informationMessageBox(QStringLiteral("提示"), QStringLiteral("%1\n转换\n%2\n完成").arg(mSourceFile).arg(mTargetFile));
    91.     }
    92.     else
    93.     {
    94.         informationMessageBox(QStringLiteral("提示"), QStringLiteral("%1\n转换\n%2\n失败").arg(mSourceFile).arg(mTargetFile));
    95.     }
    96. }
    97.  
    98. void MainWindow::updateTimer()
    99. {
    100.     if (!mTmpStr.isEmpty())
    101.     {
    102.         ui->textBrowser->append(mTmpStr);
    103.         mTmpStr.clear();
    104.     }
    105. }
    106.  
    107. void MainWindow::initListWidget()
    108. {
    109.     QStringList nameLst;
    110.     nameLst.append(QStringLiteral("FLAC转MP3")); // ffmpeg -i input.flac -ab 320k -map_metadata 0 -id3v2_version 3 output.mp3
    111.     nameLst.append(QStringLiteral("M4A转MP3")); // ffmpeg -i 1.m4a -acodec libmp3lame -aq 0 123.mp3
    112.     nameLst.append(QStringLiteral("WAV转MP3")); // ffmpeg -i input.wav -f mp3 -acodec libmp3lame -aq 0 output.mp3
    113.     nameLst.append(QStringLiteral("APE转MP3")); // ffmpeg -i 1.ape -acodec libmp3lame -aq 0 123.mp3
    114.     nameLst.append("");
    115.     nameLst.append(QStringLiteral("MP4转M4A")); // ffmpeg -i test.mp4 -acodec copy -vn 123.m4a
    116.     nameLst.append(QStringLiteral("MP4转AAC")); // ffmpeg -i test.mp4 -acodec copy -vn 123.aac
    117.     nameLst.append(QStringLiteral("MP4转MP3")); // ffmpeg -i test.mp4 -acodec libmp3lame -aq 0 123.mp3
    118.     nameLst.append("");
    119.     nameLst.append(QStringLiteral("MP3转OGG")); // ffmpeg -i bb.mp3 -acodec libvorbis -ab 128k bb.ogg
    120.     nameLst.append(QStringLiteral("MP3转WAV")); // ffmpeg -i input.mp3 -f wav output.wav
    121.  
    122.     QMap cmdMap;
    123.     cmdMap.insert(QStringLiteral("FLAC转MP3"), QStringLiteral("ffmpeg -i \"%1\" -ab 320k -map_metadata 0 -id3v2_version 3 -aq 0 \"%2\""));
    124.     cmdMap.insert(QStringLiteral("M4A转MP3"), QStringLiteral("ffmpeg -i \"%1\" -acodec libmp3lame -aq 0 \"%2\""));
    125.     cmdMap.insert(QStringLiteral("WAV转MP3"), QStringLiteral("ffmpeg -i \"%1\" -f mp3 -acodec libmp3lame -aq 0 \"%2\""));
    126.     cmdMap.insert(QStringLiteral("APE转MP3"), QStringLiteral("ffmpeg -i \"%1\" -acodec libmp3lame -aq 0 \"%2\""));
    127.     cmdMap.insert(QStringLiteral("MP4转M4A"), QStringLiteral("ffmpeg -i \"%1\" -acodec copy -vn \"%2\""));
    128.     cmdMap.insert(QStringLiteral("MP4转AAC"), QStringLiteral("ffmpeg -i \"%1\" -acodec copy -vn \"%2\""));
    129.     cmdMap.insert(QStringLiteral("MP4转MP3"), QStringLiteral("ffmpeg -i \"%1\" -acodec libmp3lame -aq 0 \"%2\""));
    130.     cmdMap.insert(QStringLiteral("MP3转OGG"), QStringLiteral("ffmpeg -i \"%1\" -acodec libvorbis -ab 128k \"%2\""));
    131.     cmdMap.insert(QStringLiteral("MP3转WAV"), QStringLiteral("ffmpeg -i \"%1\" -f wav \"%2\""));
    132.  
    133.     foreach (QString name, nameLst)
    134.     {
    135.         QListWidgetItem *item = new QListWidgetItem;
    136.         if (!name.isEmpty())
    137.         {
    138.             item->setText(name);
    139.             item->setData(Qt::UserRole, cmdMap.value(name));
    140.         }
    141.         else
    142.         {
    143.             item->setText("");
    144.             item->setData(Qt::UserRole, "");
    145.         }
    146.         ui->listWidget->addItem(item);
    147.     }
    148. }
    149.  
    150. QString MainWindow::getFileSuffix(QString file)
    151. {
    152.     QString ret;
    153.  
    154.     if (file == "FLAC")
    155.     {
    156.         ret = QStringLiteral("flac");
    157.     }
    158.     else if (file == "MP3")
    159.     {
    160.         ret = QStringLiteral("mp3");
    161.     }
    162.     else if (file == "M4A")
    163.     {
    164.         ret = QStringLiteral("m4a");
    165.     }
    166.     else if (file == "WAV")
    167.     {
    168.         ret = QStringLiteral("wav");
    169.     }
    170.     else if (file == "APE")
    171.     {
    172.         ret = QStringLiteral("ape");
    173.     }
    174.     else if (file == "AAC")
    175.     {
    176.         ret = QStringLiteral("aac");
    177.     }
    178.     else if (file == "MP4")
    179.     {
    180.         ret = QStringLiteral("mp4");
    181.     }
    182.     else if (file == "OGG")
    183.     {
    184.         ret = QStringLiteral("ogg");
    185.     }
    186.  
    187.     return ret;
    188. }
    189.  
    190. void MainWindow::convert()
    191. {
    192.     QListWidgetItem *item = ui->listWidget->currentItem();
    193.     QString tmp = item->data(Qt::UserRole).toString();
    194.  
    195.     if (mProcess->isOpen())
    196.     {
    197.         mProcess->close();
    198.     }
    199.  
    200.     mSourceFile.clear();
    201.     mTargetFile.clear();
    202.     mSource.clear();
    203.     mTarget.clear();
    204.     mSourceSuffix.clear();
    205.     mTargetSuffix.clear();
    206.  
    207.     if (!tmp.isEmpty())
    208.     {
    209.         mTitle = item->text();
    210.         mCmd = tmp;
    211.         setWindowTitle(QStringLiteral("ffmpeg工具 - %1").arg(mTitle));
    212.     }
    213.     else
    214.     {
    215.         mTitle.clear();
    216.         mCmd.clear();
    217.         setWindowTitle(QStringLiteral("ffmpeg工具"));
    218.     }
    219. }
    220.  
    221. bool MainWindow::informationMessageBox(const QString &title, const QString &text, bool isOnlyOk)
    222. {
    223.     QMessageBox msgBox(this);
    224.     msgBox.setFont(this->font());
    225.     msgBox.setIcon(QMessageBox::Information);
    226.     msgBox.setWindowTitle(title);
    227.     msgBox.setText(text);
    228.     if (isOnlyOk)
    229.     {
    230.         msgBox.setStandardButtons(QMessageBox::Ok);
    231.         msgBox.setButtonText(QMessageBox::Ok, QStringLiteral("确定"));
    232.     }
    233.     else
    234.     {
    235.         msgBox.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
    236.         msgBox.setButtonText(QMessageBox::Ok, QStringLiteral("确定"));
    237.         msgBox.setButtonText(QMessageBox::Cancel, QStringLiteral("取消"));
    238.     }
    239.  
    240.     return (msgBox.exec() == QMessageBox::Ok);
    241. }
    242.  
    243. void MainWindow::closeEvent(QCloseEvent *event)
    244. {
    245.     if (informationMessageBox(QStringLiteral("提示"), QStringLiteral("确定关闭"), false))
    246.     {
    247.         event->accept();
    248.     }
    249.     else
    250.     {
    251.         event->ignore();
    252.     }
    253. }
    254.  
    255. void MainWindow::on_pushButton_import_clicked()
    256. {
    257.     if (mTitle.isEmpty() || mCmd.isEmpty())
    258.     {
    259.         return;
    260.     }
    261.  
    262.     mSource = mTitle.split(QStringLiteral("转"))[0];
    263.     mTarget = mTitle.split(QStringLiteral("转"))[1];
    264.     mSourceSuffix = getFileSuffix(mSource);
    265.     mTargetSuffix = getFileSuffix(mTarget);
    266.  
    267.     if (mSourceSuffix.isEmpty() || mTargetSuffix.isEmpty())
    268.     {
    269.         informationMessageBox(QStringLiteral("提示"), QStringLiteral("不支持的文件格式"));
    270.         return;
    271.     }
    272.  
    273.     QString file = QFileDialog::getOpenFileName(this, QStringLiteral("打开%1文件").arg(mSource), QStringLiteral("."), QStringLiteral("%1文件(*.%2)").arg(mSource).arg(mSourceSuffix));
    274.     if (!file.isEmpty())
    275.     {
    276.         mSourceFile = file;
    277.         if (ui->checkBox->isChecked())
    278.         {
    279.             QString tmp = mSourceFile;
    280.             mTargetFile = tmp.replace(QStringLiteral(".%1").arg(mSourceSuffix), QStringLiteral(".%1").arg(mTargetSuffix));
    281.         }
    282.     }
    283. }
    284.  
    285. void MainWindow::on_pushButton_save_clicked()
    286. {
    287.     if (mSourceFile.isEmpty())
    288.     {
    289.         return;
    290.     }
    291.  
    292.     QString file = QFileDialog::getSaveFileName(this, QStringLiteral("保存%1文件").arg(mTarget), mTargetFile, QStringLiteral("%1文件(*.%2)").arg(mTarget).arg(mTargetSuffix));
    293.     if (!file.isEmpty())
    294.     {
    295.         mTargetFile = file;
    296.     }
    297. }
    298.  
    299. void MainWindow::on_pushButton_convert_clicked()
    300. {
    301.     if (mSourceFile.isEmpty() || mTargetFile.isEmpty())
    302.     {
    303.         return;
    304.     }
    305.  
    306.     QString cmd = mCmd.arg(mSourceFile).arg(mTargetFile);
    307.     ui->textBrowser->append("\n" + cmd + "\n");
    308.  
    309.     if (mProcess->isOpen())
    310.     {
    311.         mProcess->close();
    312.     }
    313.  
    314.     mTmpStr.clear();
    315.     mProcess->start(cmd);
    316. }
    317.
  • 相关阅读:
    Ubuntu20.04 安装QT5.9.7 环境
    c++_learning-并发与多线程
    Java Maven POM配置参考
    10分钟搞定 Spring 批处理组件 —— spring-batch
    Imaris 卡退，是不是缓存盘没有设置好？
    GaussDB数据库SQL系列-LOCK TABLE
    Linux进程（三）--进程切换&命令行参数
    我的创作纪念日的温柔与七夕的浪漫交织了在一起
    地图双屏鼠标跟随效果
    【YOLOv5/v7改进系列】引入RT-DETR的RepC3
  • 原文地址：https://blog.csdn.net/mabing993/article/details/132940995