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本文章博客地址：https://blog.csdn.net/qq21497936/article/details/109827936
各位读者，知识无穷而人力有穷，要么改需求，要么找专业人士，要么自己研究

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

FFmpegRecordManag
20000
er *_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