linux下视频传输测试

本文博客链接:http://blog.csdn.net/jdh99,作者:jdh,转载请注明.

在上一篇《ubuntu下基于qt+OpenCV控制摄像头》的基础上测试了视频传输.

环境：主机：PC + Ubuntu10.04 + OpenCV + Qt

从机：s3c6410 + linux2.6.38 + Qt

主机有摄像头，捕捉摄像头，然后通过网络传输，从机接收数据后显示。

实现流程：

主机代码：

主要代码如下,socket编程采用Linux本身提供的方法。

widget.h

#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include "public.h"
namespace Ui {
class Widget;
}
class Widget : public QWidget
{
Q_OBJECT
public:
explicit Widget(QWidget *parent = 0);
~Widget();
private:
Ui::Widget *ui;
CvCapture *capture; //视频数据结构
IplImage *frame;
QTimer *timer;
QImage *img;
private slots:
void slot_timer();
protected:
void paintEvent (QPaintEvent *);
};
#endif // WIDGET_H

widget.c

#include "widget.h"
#include "ui_widget.h"
#include "public.h"
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
timer = new QTimer(this);
connect(timer,SIGNAL(timeout()),this,SLOT(slot_timer()));
timer->start(FPS);
capture = cvCreateCameraCapture(0);
//cvNamedWindow("jdh",CV_WINDOW_AUTOSIZE);
//初始化网络
init_sockaddr_in(&Dst_Addr,Udp_Port,QString(DST_IP));
//套接字初始化
Socket_Send = socket(AF_INET,SOCK_DGRAM,0);
//img = new QImage("test.jpg");
//img->save("test_save.png","PNG",0);
//img->save("test_save.jpeg","JPEG",10);
}
void Widget::slot_timer()
{
frame = cvQueryFrame(capture);
if (!frame)
{
return;
}
//img->load("test.jpg");
cvCvtColor(frame,frame,CV_BGR2RGB);
img = new QImage((unsigned char*)frame->imageData,frame->width,frame->height,frame->widthStep,QImage::Format_RGB888);
//img = new QImage((unsigned char*)frame->imageData,frame->width,frame->height,QImage::Format_RGB888);
update();
//cvShowImage("jdh",frame);
img->save("test_save.jpeg","JPEG",ZHILIANG);
QFile file("test_save.jpeg");
if (!file.open(QIODevice::ReadOnly))
return;
QByteArray buffer = file.readAll();
if (sendto(Socket_Send,buffer.data(),buffer.size(),0,(struct sockaddr *)(&Dst_Addr),sizeof(struct sockaddr_in)) < 0)
{
cout << "send fail" << " " << buffer.size() << endl;
perror("hello");
}
file.close();
//网络发送
/*
if (sendto(Socket_Send,img->data_ptr(),img->byteCount(),0,(struct sockaddr *)(&Dst_Addr),sizeof(struct sockaddr_in)) < 0)
{
cout << "send fail" << " " << frame->width << " " << frame->height << " " << img->byteCount() << endl;
perror("hello");
}
*/
}
void Widget::paintEvent(QPaintEvent * event)
{
//painter->drawImage(0,0,mm);
QPainter *pp = new QPainter(this);
pp->drawImage(0,0,*img);
}
Widget::~Widget()
{
delete ui;
cvReleaseImage(&frame);
//cvDestroyWindow("jdh");
}

从机主要代码如下,socket编程采用qt里机制

widget.h

#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include "public.h"
namespace Ui {
class Widget;
}
class Widget : public QWidget
{
Q_OBJECT
public:
explicit Widget(QWidget *parent = 0);
~Widget();
private:
Ui::Widget *ui;
QImage *img;
QUdpSocket *receiver;
protected:
void paintEvent(QPaintEvent *);
private slots:
void processPendingDatagram();
};
#endif // WIDGET_H

widget.c

#include "widget.h"
#include "ui_widget.h"
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
receiver = new QUdpSocket(this);
receiver->bind(Udp_Port,QUdpSocket::ShareAddress);
connect(receiver,SIGNAL(readyRead()),this,SLOT(processPendingDatagram()));
}
void Widget::paintEvent(QPaintEvent *)
{
QPainter *pp = new QPainter(this);
pp->drawImage(0,0,*img);
}
void Widget::processPendingDatagram()
{
qint64 num = receiver->pendingDatagramSize();
cout << "receive size = " << num << endl;
QByteArray buffer;
buffer.resize(num);
receiver->readDatagram((char *)buffer.data(),num);
QFile file("test_save.jpeg");
if (!file.open(QIODevice::WriteOnly))
return;
file.write(buffer);
file.close();
img = new QImage("test_save.jpeg");
update();
}
Widget::~Widget()
{
delete ui;
}

从机端显示:

http://blog.csdn.net/jdh99/article/details/6672481

巴特西

linux下视频传输测试

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