关于ffmpeg:项目实战QtFFmpeg录屏应用支持帧率清晰度设置

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本文章博客地址：https://blog.csdn.net/qq21497936/article/details/109827936
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红瘦子(红模拟)的博文大全：开发技术汇合（蕴含Qt实用技术、树莓派、三维、OpenCV、OpenGL、ffmpeg、OSG、单片机、软硬联合等等）继续更新中...（点击传送门）

Qt开发专栏：我的项目实战（点击传送门）

需要

  实现录屏性能。

原理

  应用抓屏模块依照指定范畴和帧率抓屏，同时应用录像模块依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”搜寻“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_OBJECTpublic:    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;         // 抓屏治理类    QThread *_pGrabWindowManagerThread;             // 抓屏线程    FFmpegRecordManager *_pFFmpegRecordManager;     // 录制治理类    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：红瘦子(AAA红模拟) 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, "保留到文件夹", ".");    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