Created
March 8, 2013 14:28
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getUserMedia demo
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| var express = require("express"); | |
| var app = express(); | |
| app.use("/static", express.static(__dirname + '/public')); | |
| var port = process.env.PORT || 3000; | |
| app.listen(port); | |
| console.log("Listening on port " + port); |
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| (function(){ | |
| var streamVideo = function(){ | |
| requestAnimationFrame(streamVideo); | |
| var context = canvas.getContext("2d"); | |
| context.drawImage(video, 0, 0, canvas.width, canvas.height); | |
| drawGrid(context,3); | |
| }; | |
| var drawGrid = function(context, divisions){ | |
| drawHorizontalLines(context, divisions); | |
| drawVerticalLines(context, divisions); | |
| }; | |
| var drawHorizontalLines = function(context, divisions){ | |
| var width = context.canvas.width; | |
| var dy = context.canvas.height / divisions; | |
| for (var index = 0; index < divisions; index++){ | |
| var y = dy * index; | |
| context.beginPath(); | |
| context.moveTo(0,y); | |
| context.lineTo(width, y); | |
| context.stroke(); | |
| } | |
| }; | |
| var drawVerticalLines = function(context, divisions){ | |
| var dx = context.canvas.width / divisions; | |
| var height = context.canvas.height; | |
| for (var index = 0; index < divisions; index++){ | |
| var x = dx * index; | |
| context.beginPath(); | |
| context.moveTo(x,0); | |
| context.lineTo(x, height); | |
| context.stroke(); | |
| } | |
| }; | |
| var video = document.querySelector("video"); | |
| var canvas = document.querySelector("canvas"); | |
| canvas.width = 640; | |
| canvas.height = 480; | |
| navigator.getUserMedia = navigator.webkitGetUserMedia; | |
| navigator.getUserMedia({ "video" : true }, function(localMediaStream){ | |
| video.src = window.URL.createObjectURL(localMediaStream); | |
| streamVideo(); | |
| }, function(e){ | |
| console.log("Failed", e); | |
| }); | |
| })(); |
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| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| </head> | |
| <body> | |
| <video autoplay></video> | |
| <canvas></canvas> | |
| <script src="js/camera.js" type="text/javascript"></script> | |
| </body> | |
| </html> |
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