关于video标签播放base64格式文件

<video controls>
    <source :src="decoding(base64Src)" type="video/mp4" />
</video>

data() {
    return {
        base64Src:'data:image/video;base64,XXXXX',
    }
}

methods:{
    decoding() {
        let newBase64Arr = dataurl.split(',')
        let newBase64Src = atob(newBase64Arr[1])
        return newBase64Src
    }
}