Question

我有这个html代码（在php文件中）：

<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" integrity="sha384-WskhaSGFgHYWDcbwN70/dfYBj47jz9qbsMId/iRN3ewGhXQFZCSftd1LZCfmhktB" crossorigin="anonymous">
    <link rel="stylesheet" href="mystyle/mystyle1.css">



</head>

<body>
    <h1> try media stream page</h1> <br>

    <div class="container">
         <video id="video" width="400" height="300">
             Your browser do not suppoer this vidio!
         </video>
    </div>

    <div id="demo">

    </div>

<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.3/js/bootstrap.min.js" integrity="sha384-a5N7Y/aK3qNeh15eJKGWxsqtnX/wWdSZSKp+81YjTmS15nvnvxKHuzaWwXHDli+4" crossorigin="anonymous"></script>
<script defer src="https://use.fontawesome.com/releases/v5.0.8/js/all.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="functions/funcs.js"></script>
</body>
</html>

和此javascript代码：

$(document).ready(function(){
    var constraints = { audio: true, video: true}; 
    navigator.mediaDevices.getUserMedia(constraints)
    .then(mediaStream => {
    var video = document.querySelector('video');
    video.srcObject = mediaStream;
    var myJSON = JSON.stringify(mediaStream);
    console.log(myJSON);
    video.play();
    });
});

当我从浏览器进入php文件时，输出是带有用户摄像头的视频流。

我正在尝试对mediaStream对象进行字符串化但是stringify函数将空字符串返回到myJSON，这是什么问题？

我的主要目标是对mediaStream对象进行字符串化，然后将字符串写入文件，从其他用户读取该文件，然后将字符串解析回mediaStream对象，以向该用户显示特定用户的摄像机流。
也许还有其他简单的方法可以做到这一点？

如何对大型javascript对象进行字符串化

0 个答案: