问带有缩略图的angularjs视频上传

EN

angular
    .module('chotaMangoAdmin')
    .directive('fileUpload', fileModel);

    fileModel.$inject = [ '$parse' ];
    ngThumb.$inject = ['$window'];

    function fileModel($parse) {
        return {
           scope:true,        //create a new scope
           link: function(scope, element, attrs) {   
              element.bind('change', function(event){
                 var files = event.target.files;
                 console.log(files.length);
                 scope.$emit("fileSelected", { images: files });
              });
           }
        };
    }