How to Create a Http Mjpeg Streaming Server with Qtcp-Server Sockets

How to Create a HTTP MJPEG Streaming Server With QTcp-Server Sockets?

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();
}

How to Create a Http Server with TCP Server Sockets in C++/QT

You have an extra space between the / and 1.1, and you are missing an empty line between the headers block and the response body.

Browser Connection Reset when using TCPServerwith Qt

After LOTS of trial and error (and luck), I found the solution. The code should end like this -

...
socket->flush();
socket->waitForBytesWritten(10000);
socket->close();

EDIT -

After trying again, I found out this - There should be an extra \r\n after the headers. So this will work -

void TcpServer::newConnection()
{
QTcpSocket *socket = server->nextPendingConnection();
QByteArray header = "HTTP/1.1 200 OK\r\n";
socket->write(header);
QByteArray ContentType = "Content-Type: text/html\r\n\r\n\*Here is the edit*\";
socket->write(ContentType);
QByteArray Body = "Test";
socket->write(Body);
socket->flush();
socket->close();
}

Error while using QTcpSocket

Here Is the Code I used to open the MJPEG Streaming Server in my original Project. Perhaps It can help you finding out your Problem.

void MjpegStreamingEngine::StartServer(){

    m_TcpHttpServer = new QTcpServer();

    m_TcpHttpServer->connect(m_TcpHttpServer,
                             SIGNAL(newConnection()),
                             this,
                             SLOT(TcpHttpconnected()));

    m_TcpHttpServer->listen(QHostAddress::Any,
                            8889);
}

void MjpegStreamingEngine::TcpHttpconnected(){

    m_TcpHttpClient = m_TcpHttpServer->nextPendingConnection();

    m_TcpHttpClient->connect(m_TcpHttpClient,
                             SIGNAL(readyRead()),
                             this,
                             SLOT(TcpHttpreadyRead()));

}

void MjpegStreamingEngine::TcpHttpreadyRead(){

    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){

        if (m_TcpHttpClient->isOpen())
        {

            // Send Image

            QThread::msleep(10);

        }else{
            return;
        }

    }

    m_TcpHttpClient->disconnect(); //Should never be Reached
}

OpenCV create Output Stream

In the End I figured out that OpenCV is not capable of creating an Output-Live Video Stream. Its only possible to render a Video to File.

Instead i created my own little Http Motion-JPEG Stream
How to Create a HTTP MJPEG Streaming Server With QTcp-Server Sockets?

I also want to Mention that VLC provides a very powerful Backend / libs.
C++ LibVLC Create Stream from Frames/Images

Another Soloution could be to use GStreamer if you are on Linux

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