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本文章博客地址：https://blog.csdn.net/qq21497936/article/details/109827936
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红胖子(红模仿)的博文大全：开发技术集合（包含Qt实用技术、树莓派、三维、OpenCV、OpenGL、ffmpeg、OSG、单片机、软硬结合等等）持续更新中…（点击传送门）

Qt开发专栏：项目实战（点击传送门）

需求

实现录屏功能。

原理

使用抓屏模块按照指定范围和帧率抓屏，同时使用录像模块按照指定图像大小和帧率录制。

Demo

体验下载地址

CSDN：https://download.csdn.net/download/qq21497936/13126842
QQ群：1047134658（点击“文件”搜索“ffmpegRecord”，群内与博文同步更新）

v1.0.0

#ifndef RECORDWIDGET_H #define RECORDWIDGET_H #include <QWidget> #include <QThread> #include <QFileDialog> #include <QDateTime> #include "GrabWindowManager.h" #include "FFmpegRecordManager.h" namespace Ui { class RecordWidget; } class RecordWidget : public QWidget { Q_OBJECT public: explicit RecordWidget(QWidget *parent = 0); ~RecordWidget(); protected slots: void slot_timeChange(int time); private slots: void on_pushButton_startRecord_clicked(); void on_pushButton_stopRecord_clicked(); void on_pushButton_browser_clicked(); private: Ui::RecordWidget *ui; GrabWindowManager *_pGrabWindowManager; // 抓屏管理类 QThread *_pGrabWindowManagerThread; // 抓屏线程 FFmpegRecordManager *_pFFmpegRecordManager; // 录制管理类 QThread *_pFFmpegRecordManagerThread; // 录制线程 }; #endif // RECORDWIDGET_H

#include "RecordWidget.h" #include "ui_RecordWidget.h" #include <QDateTime> RecordWidget::RecordWidget(QWidget *parent) : QWidget(parent), ui(new Ui::RecordWidget), _pGrabWindowManager(0), _pGrabWindowManagerThread(0) { ui->setupUi(this); QString version = "v1.0.0"; setWindowTitle(QString("录屏Demo %1(作者：红胖子(AAA红模仿) QQ:21497936 微信:yangsir198808 博客地址:blog.csdn.net/qq21497936)").arg(version)); // 初始化抓屏线程 _pGrabWindowManagerThread = new QThread(); _pGrabWindowManager = new GrabWindowManager(); _pGrabWindowManager->moveToThread(_pGrabWindowManagerThread); connect(_pGrabWindowManager, SIGNAL(signal_timeChange(int)), this, SLOT(slot_timeChange(int))); _pGrabWindowManagerThread->start(); // 初始化录制线程 _pFFmpegRecordManagerThread = new QThread(); _pFFmpegRecordManager = new FFmpegRecordManager(); _pFFmpegRecordManager->moveToThread(_pFFmpegRecordManagerThread); connect(_pFFmpegRecordManagerThread, SIGNAL(started()), _pFFmpegRecordManager, SLOT(slot_start())); _pFFmpegRecordManagerThread->start(); // 关联信号 connect(_pGrabWindowManager, SIGNAL(signal_grapWindow(QImage)), _pFFmpegRecordManager, SLOT(slot_encoderOneFrame(QImage))); // 按键状态初始化 ui->pushButton_startRecord->setEnabled(true); ui->pushButton_stopRecord->setEnabled(false); ui->lineEdit_dirPath->setReadOnly(true); ui->lineEdit_dirPath->setText(QCoreApplication::applicationDirPath()); ui->lineEdit_value->setValidator(new QIntValidator(1, 100)); ui->lineEdit_fps->setValidator(new QIntValidator(5, 50)); } RecordWidget::~RecordWidget() { delete ui; } void RecordWidget::slot_timeChange(int time) { ui->label_time->setText(QString("%1%2:%3%4").arg(time/60/10) .arg(time/60%10) .arg(time%60/10) .arg(time%10)); } void RecordWidget::on_pushButton_startRecord_clicked() { slot_timeChange(0); QScreen *pScreen = QGuiApplication::primaryScreen(); QRect rect = pScreen->availableGeometry(); _pFFmpegRecordManager->setFps(ui->lineEdit_fps->text().toInt()); _pFFmpegRecordManager->setWidthIn(rect.width()); _pFFmpegRecordManager->setHeightIn(rect.height()); _pFFmpegRecordManager->setWidthOut(rect.width()); _pFFmpegRecordManager->setHeightOut(rect.height()); _pFFmpegRecordManager->setValue(ui->lineEdit_value->text().toInt()); _pFFmpegRecordManager->slot_startEncoder(QString("%1/%2.mp4") .arg(ui->lineEdit_dirPath->text()) .arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh_mm_ss")), AV_PIX_FMT_BGRA); _pGrabWindowManager->slot_startGrabWindow(rect.x(), rect.y(), rect.width(), rect.height(), ui->lineEdit_fps->text().toInt()); ui->pushButton_startRecord->setEnabled(false); ui->pushButton_stopRecord->setEnabled(true); ui->pushButton_browser->setEnabled(false); ui->lineEdit_fps->setEnabled(false); ui->lineEdit_value->setEnabled(false); } void RecordWidget::on_pushButton_stopRecord_clicked() { _pGrabWindowManager->slot_stopGrabWindow(); _pFFmpegRecordManager->slot_stopEncoder(); ui->pushButton_startRecord->setEnabled(true); ui->pushButton_stopRecord->setEnabled(false); ui->pushButton_browser->setEnabled(true); ui->lineEdit_fps->setEnabled(true); ui->lineEdit_value->setEnabled(true); } void RecordWidget::on_pushButton_browser_clicked() { QString dir = QFileDialog::getExistingDirectory(0, "保存到文件夹", "."); if(dir.isEmpty()) { return; } ui->lineEdit_dirPath->setText(dir); }

若该文为原创文章，转载请注明原文出处
本文章博客地址：https://blog.csdn.net/qq21497936/article/details/109827936