Qt界面使用OpenCV、RTSP加载网络摄像头，并实时显示
注意：
1、Qt界面加载网络摄像头，并实时显示
2、使用OpenCV、RTSP打开摄像头
3、适合初学者
4、本人使用Qt5.10.0、vs2015、opencv3.4.3，必须在运行根目录添加opencv动态库或将此库添加环境变量
代码：
********************LoadCamera.pro********************
#-------------------------------------------------
#
# Project created by QtCreator 2020-04-07T08:48:03
#
#-------------------------------------------------
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = LoadCamera
TEMPLATE = app
# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
SOURCES += \
main.cpp \
cframe.cpp \
CReadVideo.cpp
HEADERS += \
cframe.h \
CReadVideo.h
INCLUDEPATH += \
D:\Softwares\opencv3.4.3\build\include\
D:\Softwares\opencv3.4.3\build\include\opencv\
D:\Softwares\opencv3.4.3\build\include\opencv2\
win32:CONFIG(release, debug|release): LIBS += -LD:/Softwares/opencv3.4.3/build/x64/vc15/lib/ -lopencv_world343
else:win32:CONFIG(debug, debug|release): LIBS += -LD:/Softwares/opencv3.4.3/build/x64/vc15/lib/ -lopencv_world343d
********************main.cpp********************
#include "cframe.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
CFrame w;
w.show();
return a.exec();
}
********************cframe.h********************
#ifndef CFRAME_H
#define CFRAME_H
#include <QFrame>
#include <CReadVideo.h>
#include <QLabel>
class CFrame : public QFrame
{
Q_OBJECT
public:
explicit CFrame(QWidget *parent = 0);
~CFrame();
protected:
//窗体改变大小
void resizeEvent(QResizeEvent* event) override;
protected slots:
//接收摄像头数据
void slotRecviveQimage(const QImage& image);
private:
//摄像头显示在的QLabel控件
QLabel *m_LabelCameraView;
//读视频线程
CReadVideo* m_ReadVideo;
};
#endif // CFRAME_H
********************cframe.cpp********************
#include "cframe.h"
CFrame::CFrame(QWidget *parent) :
QFrame(parent)
{
resize(960, 540);
this->setMinimumWidth(192);
this->setMinimumHeight(108);
m_LabelCameraView = new QLabel(this);
m_LabelCameraView->setGeometry(0, 0, this->width(), this->height());
//海康摄像头rtsp://admin:admin12345@192.168.10.100/h264/ch1/main/av_stream ch2是辅码流
//大华摄像头rtsp://admin:zhhh6052@192.168.2.5:554/cam/realmonitor?channel=1&subtype=0 subtype=1是辅码流
m_ReadVideo = new CReadVideo(this);
m_ReadVideo->setVideoAddress("rtsp://admin:zhhh6052@10.0.105.101:554/cam/realmonitor?channel=1&subtype=0");connect(m_ReadVideo, SIGNAL(sendQImage(const QImage)), this, SLOT(slotRecviveQimage(const QImage)));
m_ReadVideo->start();
}
CFrame::~CFrame()
{
m_ReadVideo->stop();
delete m_ReadVideo;
m_ReadVideo = nullptr;
delete m_LabelCameraView;
m_LabelCameraView = nullptr;
}
void CFrame::resizeEvent(QResizeEvent *event)
{
Q_UNUSED(event);
//界面大小修改，则显示窗口跟随改变
m_LabelCameraView->setGeometry(0, 0, this->width(), this->height());
}
void CFrame::slotRecviveQimage(const QImage& image)
{
if(this->isHidden())
return;
m_LabelCameraView->setPixmap(QPixmap::fromImage(image));
}
********************creadvideo.h********************
#ifndef CREADVIDEO_H
#define CREADVIDEO_H
#include <QThread>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/videoio/videoio.hpp>
class CReadVideo : public QThread
{
Q_OBJECT
public:
explicit CReadVideo(QObject *parent = nullptr);
~CReadVideo();
void stop();
//设置网络摄像头地址
void setVideoAddress(const QString& str);
signals:
void sendQImage(const QImage&);
protected:
virtual void run();
private:
bool stopped;
cv::VideoCapture m_VideoCapture;
//Mat数据
cv::Mat m_MatRead, m_MatRGB;
//网络摄像头地址
QString m_sVideoAddress;
};
#endif // CREADVIDEO_H
********************CReadVideo.cpp********************
#include "CReadVideo.h"
#include <QImage>
CReadVideo::CReadVideo(QObject *parent) : QThread(parent)
{
stopped = false;
m_sVideoAddress = "";
}
CReadVideo::~CReadVideo()
{
stopped = true;
if(this->isRunning())
{
this->stop();
//等待1500毫秒，线程退出
for(int i=0; i<300; ++i)
{
if(stopped == false)
break;
//qDebug()<<"wait stop"<<i<<stopped;
msleep(5);
}
}
}
void CReadVideo::stop()
{
stopped = true;
}
void CReadVideo::setVideoAddress(const QString& str)
{
m_sVideoAddress = str;
}
void CReadVideo::run()
{
stopped = false;
while(!stopped)
{
try{
//打开摄像头
if(!m_VideoCapture.open(m_sVideoAddress.toStdString()))
{
sleep(6);
continue;
}
while(!stopped)
{
if(!stopped)
{
//读取摄像头视频
if(m_VideoCapture.read(m_MatRead))
{
//OpenCV使用BGR，QImage使用RGB，通道转换
cv::cvtColor(m_MatRead, m_MatRGB, CV_BGR2RGB);
//cv::Mat转QImage
QImage image = QImage(m_MatRGB.data, m_MatRGB.cols, m_MatRGB.rows, QImage::Format_RGB888);
//发送转换完成的QImage信号
if(!stopped)
emit sendQImage(image);
}
else
{
break;
}
}
else
{
break;
}
}
}
catch(QString sException)
{
Q_UNUSED(sException);
sleep(60);
continue;
}
}
//m_VideoCapture.release();
stopped = false;
}
********************结束********************
整体代码，请见我的资源https://download.csdn.net/download/u011093735/15082017
