submit.js

 $('#process-btn').on('click', function (e) {

                if ($(this).hasClass('disabled') || ($('.dz-complete').length != $('.dz-processing').length)) {
                    e.preventDefault();

                }
                else {
                    e.preventDefault();
                    //construct array from filenames
                    var videos = [];
                    $('#dz-video .dz-complete').each(function (i, d) {
                        videos.push($(d).data('filename'));
                    });
                    var audio = ''
                    $('#dz-audio .dz-complete').each(function (i, d) {
                        audio = $(d).data('filename');
                    });

                    $.ajax({
                        url: '/process',
                        method: 'POST',
                        contentType: 'application/json',
                        beforeSend: function () {
                            $.blockUI({message: $('#loader').show().clone().html() + '<h1> Just a moment...</h1>'})
                        },
                        data: JSON.stringify({videos: videos, audio: audio})
                    }).done(function (result) {

                        location.href = '/';

                    }).fail(function() {
                        alert('Error 3204: Error starting the process. ')
                    })

                }
            })