How to stream a motion jpeg using owin/katana?

Question

I am self hosting OWIN/KATANA in a windows service. Right now I have implemented a way to grab a single image from a camera. I would like to grab multiple frames from the camera and stream them back to a img tag on an html page. Is this possible with OWIN/KATANA?

Answer 1

app.Map("/Camera/Video", a =>
{
    a.Run(context =>
    {
        string connectionid = CurrentDevice.Value.ToString();
        object ret = DeviceManager.Instance.SendMessageToDevice(connectionid, "startmovie");
        context.Response.Headers.Add("Content-Type", new string[] { "multipart/x-mixed-replace; boundary=--jpgboundary" });

        bool con = true;
        StreamWriter writer = new StreamWriter(context.Response.Body);
        while (con)
        {
            using (MemoryStream ms = new MemoryStream())
            {
                Image img = (Image)DeviceManager.Instance.SendMessageToDevice(connectionid, "capturestill");
                img.Save(ms, ImageFormat.Jpeg);
                byte[] buffer = ms.GetBuffer();

                writer.WriteLine("--jpgboundary");
                writer.WriteLine("Content-Type: image/jpeg");
                writer.WriteLine(string.Format("Content-length: {0}", buffer.Length));
                writer.WriteLine();
                context.Response.Write(buffer);
                //writer.WriteLine(Convert.ToBase64String(buffer));
                writer.Flush();
            }
            Thread.Sleep(200);
        }
        DeviceManager.Instance.SendMessageToDevice(connectionid, "stopmovie");
        return context.Response.WriteAsync("");
    });
});

I figured out what my issue was. I was using WriteAsync and I needed to use just the Write. The above works great. I just need to figure out how to stop it now.