camera_barcode_reader.js

var dbr = require('../../index.js');
// Get a license key from https://www.dynamsoft.com/customer/license/trialLicense/?product=dcv&package=cross-platform
dbr.initLicense("DLS2eyJoYW5kc2hha2VDb2RlIjoiMjAwMDAxLTE2NDk4Mjk3OTI2MzUiLCJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSIsInNlc3Npb25QYXNzd29yZCI6IndTcGR6Vm05WDJrcEQ5YUoifQ==");
var barcodeTypes = dbr.barcodeTypes;

var v4l2camera = require("v4l2camera");

var cam = new v4l2camera.Camera("/dev/video0");

// list all supported formats
console.log(cam.formats);

// set frame format as YUYV
var format = cam.formats[0];
cam.configSet(format);

if (cam.configGet().formatName !== "YUYV") {
    console.log("YUYV camera required");
    process.exit(1);
}

cam.start();

function capture() {
    cam.capture(function (success) {
        var frame = cam.frameRaw();

        dbr.decodeYUYVAsync(frame, format.width, format.height, barcodeTypes,
            function (msg) {
                var result = null;
                for (index in msg) {
                    result = msg[index]
                    console.log("Format: " + result['format']);
                    console.log("Value : " + result['value']);
                    console.log("##################");
                }
                setTimeout(capture, 0);
            }, "");
    });
}

setTimeout(capture, 0);