uniappAPIchooseVideo调用手机摄像头录制视频会在手机相册里产生两个视频文件，如何只产生一个

<template>  
    <view>  
        <view class="uni-padding-wrap">  
            <view v-if="videoPath !== ''">  
                <video  
                    id="myVideo"  
                    :src="videoPath"  
                    @error="videoErrorCallback"  
                    enable-danmu  
                    danmu-btn  
                    controls  
                ></video>  
            </view>  
            <button type="primary" @click="saveVideo">录制视频并保存到本地</button>  
        </view>  
        <view>  
            tempFilePath:{{tempFilePath}}  
        </view>  
        <view>  
            tempFile:{{tempFile}}  
        </view>  
        <view>  
            size:{{size}}  
        </view>  
        <view>  
            name:{{name}}  
        </view>  

    </view>  
</template>  
<script>  
export default {  
    data() {  
        return {  
            videoPath: '',  
            tempFilePath: '',  
            tempFile:'',  
            size:'',  
            name:'',  
        };  
    },  
    onLoad() {},  
    methods: {  
        videoErrorCallback: function() {  
            uni.showModal({  
                content: '视频加载失败',  
                showCancel: false  
            });  
        },  

        saveVideo() {  
            let _this = this;  
            uni.chooseVideo({  
                count: 1,  
                sourceType:  ['album', 'camera'],  
                compressed: false,  
                success: res => {  
                    console.log(res.tempFilePath)  
                    this.tempFilePath = res.tempFilePath;  
                    this.tempFile = res.tempFile;  
                    this.size = res.size;  
                    this.name = res.name;  

                    this.videoPath = res.tempFilePath;  
                    this.getTempFilePath(res.tempFilePath, 'videoTempPath');  
                },  
                fail: (err) => {  
                    uni.getSetting({  
                        success: (res) => {  
                            let authStatus = res.authSetting['scope.camera'];  
                            if (!authStatus) {  
                                uni.showModal({  
                                    title: '授权失败',  
                                    content: 'Hello uni-app需要从您的相机获取视频，请在设置界面打开相关权限',  
                                    success: (res) => {  
                                        if (res.confirm) {  
                                            uni.openSetting()  
                                        }  
                                    }  
                                })  
                            }  
                        }  
                    })  
                }  
            });  
        },  

        getTempFilePath(url, types) {  
            uni.showLoading({  
                title: '保存中...'  
            });  
            // 如果已经下载本地路径，那么直接储存  
            let obj = {  
                filePath: url,  
                success: () => {  
                    uni.showModal({  
                        content: '保存成功',  
                        showCancel: false  
                    });  
                    uni.hideLoading();  
                },  
                fail: e => {  
                    uni.hideLoading();  
                    uni.showModal({  
                        content: '保存失败',  
                        showCancel: false  
                    });  
                }  
            };  

            if (types === 'videoTempPath') {  
                uni.saveVideoToPhotosAlbum(obj);  
            } else {  
                uni.saveImageToPhotosAlbum(obj);  
            }  
        }  
    }  
};  
</script>  

<style scoped>  
    view{  
        word-wrap:break-word;  

        word-break:normal;   
    }  
</style>