问题描述
我想创建一个Http服务器来发送MJPEG流。我已经能够发送图片,但没有实时流。
I want to create a Http Server to send an MJPEG Stream. I'm Already able to send an Image but no Live-Stream.
我做了什么:创建了一个TCP服务器。当客户端连接TCP-Socket时创建。然后我实现了一个ReadyRead SLOT,当浏览器发送GET请求到服务器时,它执行。
What I did: Created an TCP-Server. When a client Connects a TCP-Socket is created. Then I implemented a ReadyRead SLOT which gots executed when the Browser sends the "GET" Request to the Server.
GET / HTTP/1.1
Host: 127.0.0.1:8889
User-Agent: Mozilla/5.0...
然后我运行下面的代码
QString inbound = m_Client->readAll();
QByteArray header = "HTTP/1.1 200 OK\r\n";
m_Client->write(header);
QByteArray ContentType = "Content-Type: image/jpeg\r\n\n";
m_Client->write(ContentType);
Mat first_img; //OPENCV Material
m_Stream->read(first_img); // Read Image from Webcam
QImage img = Mat2QImage(first_img); // Convert to QImage
QByteArray ba; // QByteArray as Buffer for JPG Envoded QImage
QBuffer buffer(&ba);
buffer.open(QIODevice::WriteOnly);
img.save(&buffer, "JPG");
m_Client->write(ba); // Write The Encoded Image
m_Client->close();
我想过创建一个循环来重复图像流部分
,但这不是工作。浏览器只是保持加载,什么也不发生....
I thought about creating a loop to repeat the Image Streaming Partbut this doesn't work. The Browser Just keeps loading and nothing happens....
while(1){
Mat first_img; //OPENCV Material
m_Stream->read(first_img); // Read Image from Webcam
QImage img = Mat2QImage(first_img); // Convert to QImage
QByteArray ba; // QByteArray as Buffer for JPG Envoded QImage
QBuffer buffer(&ba);
buffer.open(QIODevice::WriteOnly);
img.save(&buffer, "JPG");
m_Client->write(ba); // Write The Encoded Image
QThread::usleep(500);
}
我缺少什么?是编码错误还是我处理请求的方式?也许mime类型?
What am I missing? Is the Coding wrong or the way i Handle The Request? Perhaps mime-types?
更新
我看看
和
,并尝试执行这些方法,但没有任何结果....
UpdateI had a look at
http://www.damonkohler.com/2010/10/mjpeg-streaming-protocol.htmlandhttps://en.wikipedia.org/wiki/Motion_JPEGand tried to implement theses Methods but without any Results....
QString inbound = m_Client->readAll();
QByteArray ContentType = ("HTTP/1.0 200 OK\r\n" \
"Server: YourServerName\r\n" \
"Connection: close\r\n" \
"Max-Age: 0\r\n" \
"Expires: 0\r\n" \
"Cache-Control: no-cache, private\r\n" \
"Pragma: no-cache\r\n" \
"Content-Type: multipart/x-mixed-replace; " \
"boundary=--BoundaryString\r\n\r\n");
m_Client->write(ContentType);
while(1){
Mat first_img; //OPENCV Material
m_Stream->read(first_img); // Read Image from Webcam
QImage img = Mat2QImage(first_img); // Convert to QImage
QByteArray ba; // QByteArray as Buffer for JPG Envoded QImage
QBuffer buffer(&ba);
buffer.open(QIODevice::WriteOnly);
img.save(&buffer, "JPG");
QByteArray BoundaryString = ("--BoundaryString\r\n" \
"Content-type: image/jpg\r\n\r\n");
m_Client->write(BoundaryString);
m_Client->write(ba); // Write The Encoded Image
QThread::usleep(500);
}
m_Client->close();
推荐答案
b我只是调整一些协议相关的东西....
I solved it myself....I just had to adjust some Protocol releated things....
m_TcpHttpClient->readAll(); // Discard "Get Request String"
QByteArray ContentType = ("HTTP/1.0 200 OK\r\n" \
"Server: en.code-bude.net example server\r\n" \
"Cache-Control: no-cache\r\n" \
"Cache-Control: private\r\n" \
"Content-Type: multipart/x-mixed-replace;boundary=--boundary\r\n\r\n");
m_TcpHttpClient->write(ContentType);
while(1){
// Image to Byte Array via OPENCV Method
std::vector<uchar> buff;
imencode(".jpg",m_VisualEngine->GetActualFrame(),buff);
std::string content(buff.begin(), buff.end());
QByteArray CurrentImg(QByteArray::fromStdString(content));
QByteArray BoundaryString = ("--boundary\r\n" \
"Content-Type: image/jpeg\r\n" \
"Content-Length: ");
BoundaryString.append(QString::number(CurrentImg.length()));
BoundaryString.append("\r\n\r\n");
m_TcpHttpClient->write(BoundaryString);
m_TcpHttpClient->write(CurrentImg); // Write The Encoded Image
m_TcpHttpClient->flush();
}
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