c# - Quickly sending base64 strings over web sockets? -


i'm attempting create video stream capturing , converting jpeg images base64 string, , sending using websockets (nodejs , socket.io) drawing on html5 canvas. code in c# capturing screen , sending using socketio4net library:

client directsocket = new client("http://iphere"); directsocket.connect();  private void timer1_tick(object sender, eventargs e) {     rectangle bounds = screen.getbounds(point.empty);     bitmap bitmap = new bitmap(bounds.width, bounds.height);      using (graphics g = graphics.fromimage(bitmap))     {         g.copyfromscreen(point.empty, point.empty, bounds.size);     }      picturebox1.image = bitmap;      // convert picturebox byte[] array     system.io.memorystream stream = new system.io.memorystream();     picturebox1.image.save(stream, system.drawing.imaging.imageformat.jpeg);     byte[] imagebytes = stream.toarray();      // convert byte[] base64 string     string base64string = convert.tobase64string(imagebytes);      // send using socketio4net     directsocket.emit("send", new { message = base64string }); }

that works fine , base64string sent node server emits it. client-side javascript code:

var socket = io.connect('iphere');  socket.on('receive', function (data) {     var canvas = document.getelementbyid('canvas');     var context = canvas.getcontext('2d');      var img = new image();     img.onload = function () {         context.drawimage(img, 0, 0, canvas.width, canvas.height);     };      img.src = "data:image/jpeg;base64," + data.message.message; });

my problem base64string large , isn't emitted fast enough client receive , display image on canvas. i'm not sure if it's node server (it's cheap vps) or if string large. possible compress base64string , send decompressing when it's received? or there way can it? help.

you try saving image jpg lower quality. can use save override accepts encoder , encoder parameters.


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