视频超过30M就没有执行这个事件，这是为什么？
$("#video-file-id").on('fileloaded', function (event, filedata, previewId, index) {

    $(".file-footer-caption").text("");
    console.log(filedata.length);
    var index = index;
    uplodaNuber = uplodaNuber + 1;
    //获取到下表并传递给start方法
    if (btnNumber != 0) {
        console.log(btnNumber);
        index = btnNumber + index;
        uploadImg(index);
    } else {
        uploadImg(index);
    }

});