QT实现视频传输功能

素材狗 2022-09-20 22:00:01 文章分类：C/C++开发点击数：次

文章标签

本文实例为大家分享了QT实现视频传输功能的具体代码，供大家参考，具体内容如下前言我们经常会进行视频的传输，这篇文章我们将讲解QT下的视频传输。客户端udp客户端，我们主要获取某个视频的文件，采用ope...

本文实例为大家分享了QT实现视频传输功能的具体代码，供大家参考，具体内容如下

前言

我们经常会进行视频的传输，这篇文章我们将讲解QT下的视频传输。

客户端

udp客户端，我们主要获取某个视频的文件，采用opencv读取后，分帧传输。我们将图片解码成base-64格式

参考代码

#include "ImageClient.h"
#include<QDebug>
#include<QBuffer>
#include<QFileDialog>
#include <opencv2/opencv.hpp>
ImageClient::ImageClient(QWidget *parent)
  : QWidget(parent)
{
  ui.setupUi(this);
 counter = 0;
 time = new QTimer(this);
 time->start(180);
 connect(time, SIGNAL(timeout()), this, SLOT(readFrame()));
 cap.open("F:/1.avi");
 if (!cap.isOpened())
 {
  qDebug() << " ===> Failed";
 }
 else
 {
  qDebug() << " ===> Succeed";
 }
 receiver = new QUdpSocket(this);
}
QByteArray ImageClient::getImageData2( QImage &image)
{
 QByteArray imageData;
 QBuffer buffer(&imageData);
 image.save(&buffer, "jpg");
 imageData = imageData.toBase64();
 return imageData;
}
QImage ImageClient::mat2QImage(cv::Mat cvImg)
{
 QImage qImg;

 if (cvImg.channels() == 3)               //3 channels color image
 {
  cv::cvtColor(cvImg, cvImg, COLOR_BGR2RGB);
  qImg = QImage((const unsigned char*)(cvImg.data),
   cvImg.cols, cvImg.rows,
   cvImg.cols*cvImg.channels(),
   QImage::Format_RGB888);
 }

 else if (cvImg.channels() == 1)          //grayscale image
 {
  qImg = QImage((const unsigned char*)(cvImg.data),
   cvImg.cols, cvImg.rows,
   cvImg.cols*cvImg.channels(),
   QImage::Format_Indexed8);
 }

 else
 {
  qImg = QImage((const unsigned char*)(cvImg.data),
   cvImg.cols, cvImg.rows,
   cvImg.cols*cvImg.channels(),
   QImage::Format_RGB888);
 }
 return qImg;
}
void ImageClient::readFrame()
{
 counter++;
 Mat source, result;
 qDebug() << counter;
 cap.read(source);
 if (source.empty())//如果视频已经读取完成则停止发送timeout()信号
 {
  time->stop();
  qDebug() << "End";
  return;
 }
 auto image = mat2QImage(source) ;
 ui.label->setPixmap(QPixmap::fromImage(image));
 auto data = getImageData2(image);
 receiver->writeDatagram(data.data(),
  data.size(),
  QHostAddress::Broadcast,  //udp广播地址
  7777);
}

服务端

获取客户端数据然^android后展现。代码如下：

#include "Server.h"
#include<QMutexLocker>
#pragma execution_character_set("utf-8")
Server::Server(QWidget *parent)
  : QWidget(parent)
{
  ui.setupUi(this);
 udpSocket = new QUdpSocket(this);
 udpSocket->bind(QHostAddress::AnyIPv4, 7777);
 connect(udpSocket, SIGNAL(readyRead()), this, SLOT(Run()), Qt::QueuedConnection);//udp数据接收  
 
}
QImage Server::getImage(const QString &data)
{
 QByteArray imageData = QByteArray::fromBase64(data.toLatin1());
 QImage image;
 image.loadFromData(imageData);
 return image;
}
void Server::Run()
{
 try
 {
  QMutexLocker locker(&mutexImage);
  datagram.resize(udpSocket->pendingDatagramSize());
  auto len = udpSocket->readDatagram(datagram.data(), datagram.size());
  auto image = Server::getImage(datagram);
  ui.label->setPixmap(QPixmap::fromImage(image));
  this_thread::sleep_for(std::chrono::millisecphponds(180));
 }
 catch (const std::exception& e)
 {
 }
}