thinkphp结合layui上传视频

<script type="text/javascript">
layui.use(['form', 'layedit','element', 'laydate','upload'], function(){
var form = layui.form;
var layer = layui.layer;
var layedit = layui.layedit;
var laydate = layui.laysdate;
// 上传
var upload = layui.upload;
var uploadInst1 = upload.render({
elem: '#uploadImgBut1', //绑定元素
url: "{:U('Admin/Upload/uploadmedia')}",//上传接口
accept: 'video',
done: function(res){
if(res['state'] ==1){
layer.msg(res['message']);
$("#uploadImg1").attr('src',res['path']).show();
$("input#uploadImgSrc1").val(res['path']);
};
}
});
});
</script>

public function uploadmedia(){
$upload = new \Think\Upload();// 实例化上传类
$mediaSize = intval(CP('MEDIASIZE'));
$mediaType = CP('MEDIATYPE');
$mediaSize = !empty($mediaSize) ? $mediaSize : 3145728;
$mediaType = !empty($mediaType) ? explode(',',$mediaType) : array('mp3','mp4');
$upload->maxSize = $mediaSize;// 设置附件上传大小
$upload->exts = $mediaType;// 设置附件上传类型
$upload->rootPath = "./Uploads/Video/"; // 设置附件上传根目录
$upload->savePath = ''; // 设置附件上传（子）目录
$dataArr = array();
$dataArr['code'] = 1;
$dataArr['msg'] = '上传成功';
$dataArr['data']['src'] = "";
$dataArr['data']['title'] = "错误";
// 上传文件
$info = $upload->upload();
if(!$info){
$dataArr['code'] = 0;
$dataArr['msg'] = '上传失败';
};
$path = "/Upload/Video/".$info['file']['savepath'].$info['file']['savename'];
$dataArr['data']['src'] = $path;
$dataArr['data']['title'] = "成功";
exit(json_encode($dataArr));
}