uniCloud.chooseAndUploadFile上传视频extension设置['avi']不生效？期望：设置后不能选择mp4文件才对

            uniCloud.chooseAndUploadFile({  
                type: 'video',  
                extension: ['avi'],  
                onChooseFile(res) {  
                    console.log('选择图片的回调',res);  
                    uni.showLoading({  
                        title: '正在上传...',  
                        mask: true  
                    })  
                    const processAll = []  
                    for (let i = 0; i < res.tempFiles.length; i++) {  
                        processAll.push(cropImg(res.tempFiles[i]))  
                    }  
                    return Promise.all(processAll).then((fileList) => {  
                        let result = {  
                            tempFilePaths: []  
                        }  
                        result.tempFiles = fileList.map((fileItem, index) => {  
                            result.tempFilePaths.push(fileItem.path)  
                            return {  
                                path: fileItem.path,  
                                cloudPath: '' + Date.now() + index + '.' + fileItem  
                                    .ext, // 云端路径，这里随便生成了一个  
                                fileType: fileItem.fileType  
                            }  
                        })  
                        return result  
                    })  
                }  
            }).then(res => {  
                console.log('视频上传成功回调', res);  
            })