process_job.js

var kue = require('kue')
        , jobs = kue.createQueue();
var spawn = require('child_process').spawn;

jobs.process('create slide', function (job, done) {
    ppt2pdf(job.data.file, done);
    console.log('Job', job.id, 'is process');
});
jobs.on('job enqueue', function (id, type) {
    console.log('job %s got queued', id);
});

jobs.on('job complete', function (id, result) {
    kue.Job.get(id, function (err, job) {
        if (err)
            return;
        console.log(' completed job #%d', job.id, result);
    });
});


function ppt2pdf(file, done) {
    var unoconv = spawn("unoconv", ["-f","pdf", "-o" , file + ".pdf", file]);

    unoconv.stdout.on('data', function (data) {
        console.log('stdout: ' + data);
    });

    unoconv.stderr.on('data', function (data) {
        console.log('stderr: ' + data);
    });
    unoconv.on('close', function (code) {
      
        var convert = spawn("convert", ["-resize","1200","-density","200",file + '.pdf', file + '.jpg']);

        convert.stdout.on('data', function (data) {
            console.log('stdout: ' + data);
        });

        convert.stderr.on('data', function (data) {
            console.log('stderr: ' + data);
        });
        convert.on('close', function (code) {
            console.log('child process exited with code ' + code);
            done && done(0);
        })
    });
}