Qt6 录制屏幕、录制声音项目实战（完整源码，可直接编译使用）

#include "widget.h" #include "ui_widget.h" #include "capturerecorder.h" #include <vector> #include <QDebug> #include <QMediaFormat> #include <QMediaRecorder> #include <QMediaDevices> #include <QAudioDevice> #include <QTime> #include <QDesktopServices> #include <QDir> #include <QStandardPaths> #include <QFileDialog> #include <QDateTime> #include <QMessageBox> Widget::Widget(QWidget *parent) : QWidget(parent) , ui(new Ui::Widget) { ui->setupUi(this); setWindowFlags(windowFlags() & ~Qt::WindowMaximizeButtonHint); this->setFixedWidth(400); this->setFixedHeight(400); ui->cmbOutputFormat->addItem("WMV", QMediaFormat::WMV); ui->cmbOutputFormat->addItem("AVI", QMediaFormat::AVI); ui->cmbOutputFormat->addItem("MP4", QMediaFormat::MPEG4); ui->cmbOutputFormat->addItem("WebM", QMediaFormat::WebM); ui->cmbOutputFormat->addItem("MP3", QMediaFormat::MP3); ui->cmbOutputFormat->setCurrentIndex(2); std::vector<int> frameRate = {0, 1, 5, 10, 24, 25, 30, 50, 60}; for (auto i : frameRate) { if (i == 0) ui->cmbVideoFrameRate->addItem("自适应", i); else ui->cmbVideoFrameRate->addItem(QString::number(i), i); } ui->cmbVideoCodec->addItem("MPEG4", (int)QMediaFormat::VideoCodec::MPEG4); ui->cmbVideoCodec->addItem("H264", (int)QMediaFormat::VideoCodec::H264); ui->cmbVideoCodec->addItem("H265", (int)QMediaFormat::VideoCodec::H265); ui->cmbVideoCodec->addItem("VP8", (int)QMediaFormat::VideoCodec::VP8); ui->cmbVideoCodec->addItem("VP9", (int)QMediaFormat::VideoCodec::VP9); ui->cmbVideoCodec->setCurrentIndex(1); ui->cmbVideoQuality->addItem("非常低", QMediaRecorder::VeryLowQuality); ui->cmbVideoQuality->addItem("低", QMediaRecorder::LowQuality); ui->cmbVideoQuality->addItem("默认", QMediaRecorder::NormalQuality); ui->cmbVideoQuality->addItem("高", QMediaRecorder::HighQuality); ui->cmbVideoQuality->addItem("非常高", QMediaRecorder::VeryHighQuality); ui->cmbVideoQuality->setCurrentIndex(2); connect(ui->btnRefresh, SIGNAL(clicked()), SLOT(slotRefreshAudioInput())); connect(ui->btnSelectDir, SIGNAL(clicked()), SLOT(slotSelectDirClicked())); connect(ui->btnOpenDir, SIGNAL(clicked()), SLOT(slotOpenDirClicked())); connect(ui->btnRestore, SIGNAL(clicked()), SLOT(slotRestoreClicked())); connect(ui->btnStart, SIGNAL(clicked()), SLOT(slotStart())); connect(ui->btnStop, SIGNAL(clicked()), SLOT(slotStop())); slotRefreshAudioInput(); ui->edtOutput->setText(QDir::homePath()); ui->edtOutput->setText(QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation)); ui->chkScreen->setChecked(true); ui->chkAudio->setChecked(true); ui->lblStatus->setText("就绪"); ui->btnStart->setText("开始"); ui->btnStop->setEnabled(false); } Widget::~Widget() { delete ui; } void Widget::slotRefreshAudioInput() { const auto &devices = QMediaDevices::audioInputs(); ui->cmbAudioInput->clear(); for (const QAudioDevice &device : devices) { ui->cmbAudioInput->addItem(device.description()); } ui->cmbAudioInput->setCurrentIndex(0); } void Widget::slotOpenDirClicked() { QString path = ui->edtOutput->text(); if (path.isEmpty() || !QDir(path).exists()) { return ; } QUrl url("file:" + path, QUrl::TolerantMode); if (!QDesktopServices::openUrl(url)){ qDebug() << url << "打开失败"; } } void Widget::slotSelectDirClicked() { QString dir = QFileDialog::getExistingDirectory(this, "请选择输出目录", "/", QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks); if (!dir.isEmpty()) { ui->edtOutput->setText(dir); } } void Widget::slotRestoreClicked() { ui->cmbOutputFormat->setCurrentIndex(2); ui->cmbVideoFrameRate->setCurrentIndex(0); ui->cmbVideoCodec->setCurrentIndex(1); ui->cmbVideoQuality->setCurrentIndex(2); } void Widget::slotStart() { if (m_running) { if (m_paused) { m_paused = false; ui->btnStart->setText("暂停"); ui->btnStart->setIcon(QIcon(":/images/pause.png")); m_pCapture->resume(); } else { m_paused = true; ui->btnStart->setText("继续"); ui->btnStart->setIcon(QIcon(":/images/start.png")); m_pCapture->pause(); } } else { QString outputPath = ui->edtOutput->text(); QDir output(outputPath); if (outputPath.isEmpty() || !output.exists()) { QMessageBox::critical(this, "错误", "请选择输出目录"); return ; } if (!ui->chkAudio->isChecked() && !ui->chkScreen->isChecked()) { QMessageBox::critical(this, "错误", "没有要录制的内容"); return ; } QString fileName = QDateTime::currentDateTime().toString("yyyyMMdd_hhmmss"); if (!m_pCapture) { m_pCapture = new CaptureRecorder(this); connect(m_pCapture, &CaptureRecorder::durationChanged, this, &Widget::slotDurationChanged); connect(m_pCapture, &CaptureRecorder::recorderStateChanged, this, &Widget::slotRecorderStateChanged); } m_pCapture->enableScreenCapture(ui->chkScreen->isChecked()); if (ui->chkAudio->isChecked()) { //设置声音输入设备 } ui->btnStart->setText("暂停"); ui->btnStart->setIcon(QIcon(":/images/pause.png")); ui->btnStop->setEnabled(true); m_paused = false; m_running = true; m_pCapture->setVideoFrameRate(ui->cmbVideoFrameRate->currentData().toInt()); m_pCapture->setVideoCodec(ui->cmbVideoCodec->currentData().toInt()); m_pCapture->setQuality(ui->cmbVideoCodec->currentData().toInt()); m_pCapture->setFileFormat(ui->cmbOutputFormat->currentData().toInt()); m_pCapture->setOutputLocation(output.filePath(fileName)); m_pCapture->record(); } } void Widget::slotStop() { if (m_running) { m_running = false; m_paused = false; ui->btnStart->setText("开始"); ui->btnStart->setIcon(QIcon(":/images/start.png")); ui->btnStop->setEnabled(false); m_pCapture->stop(); } } void Widget::slotDurationChanged(qint64 duration) { m_duration = QDateTime::fromMSecsSinceEpoch(duration, QTimeZone(QTimeZone::UTC)); ui->lblStatus->setText(QString("录制中: %1").arg(m_duration.toString("hh:mm:ss"))); } void Widget::slotRecorderStateChanged(QMediaRecorder::RecorderState state) { if (state == QMediaRecorder::RecorderState::StoppedState) { ui->lblStatus->setText(QString("已停止: %1").arg(m_duration.toString("hh:mm:ss"))); } else if (state == QMediaRecorder::RecorderState::RecordingState) { ui->lblStatus->setText(QString("录制中: %1").arg(m_duration.toString("hh:mm:ss"))); } else if (state == QMediaRecorder::RecorderState::PausedState) { ui->lblStatus->setText(QString("暂停中: %1").arg(m_duration.toString("hh:mm:ss"))); } }