将网络摄像头/摄像头视频流上传到服务器的 HTML5 解决方案

Question

使用getUserMedia 我可以从客户端的网络摄像头/摄像头捕获视频流。并且使用video 标签我可以在客户端的浏览器上显示它。代码：

<video autoplay></video>

<script type="text/javascript">
    window.URL = window.URL || window.webkitURL;
    navigator.getUserMedia  = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;

    var video = $('video')[0];

    var failed = function(e) {
        console.log('Denied!', e);
    };

    if( navigator.getUserMedia ) {
        navigator.getUserMedia( {video: true, audio: true}, function( stream ) {
                video.src = window.URL.createObjectURL(stream);
            }, failed
        )
    } else {
        console.log( 'Not supported!' );
    }
</script>

现在是否可以将此视频流作为实时馈送或在用户完成录制并决定上传后发送到服务器？

我发现了几个例子：

• sending binary images to server over websocket
• Periodically capture frame of streaming video and send that as image

Answer 1

MediaStreamRecorder 是一个用于记录 getUserMedia() 流的 WebRTC API。它允许网络应用从实时音频/视频会话中创建文件。

 <video autoplay></video>

    <script language="javascript" type="text/javascript">
    function onVideoFail(e) {
        console.log('webcam fail!', e);
      };

    function hasGetUserMedia() {
      // Note: Opera is unprefixed.
      return !!(navigator.getUserMedia || navigator.webkitGetUserMedia ||
                navigator.mozGetUserMedia || navigator.msGetUserMedia);
    }

    if (hasGetUserMedia()) {
      // Good to go!
    } else {
      alert('getUserMedia() is not supported in your browser');
    }

    window.URL = window.URL || window.webkitURL;
    navigator.getUserMedia  = navigator.getUserMedia || 
                             navigator.webkitGetUserMedia ||
                              navigator.mozGetUserMedia || 
                               navigator.msGetUserMedia;

    var video = document.querySelector('video');
    var streamRecorder;
    var webcamstream;

    if (navigator.getUserMedia) {
      navigator.getUserMedia({audio: true, video: true}, function(stream) {
        video.src = window.URL.createObjectURL(stream);
        webcamstream = stream;
    //  streamrecorder = webcamstream.record();
      }, onVideoFail);
    } else {
        alert ('failed');
    }

    function startRecording() {
        streamRecorder = webcamstream.record();
        setTimeout(stopRecording, 10000);
    }
    function stopRecording() {
        streamRecorder.getRecordedData(postVideoToServer);
    }
    function postVideoToServer(videoblob) {

        var data = {};
        data.video = videoblob;
        data.metadata = 'test metadata';
        data.action = "upload_video";
        jQuery.post("http://www.kongraju.in/uploadvideo.php", data, onUploadSuccess);
    }
    function onUploadSuccess() {
        alert ('video uploaded');
    }

    </script>

    <div id="webcamcontrols">
        <button class="recordbutton" onclick="startRecording();">RECORD</button>
    </div>

规格：

http://www.w3.org/TR/mediastream-recording/

您可以将录制的文件发送到服务器。

Answer 2

看看这篇文章：http://www.smartjava.org/content/face-detection-using-html5-javascript-webrtc-websockets-jetty-and-javacvopencv

它显示了Webrtc的用法：

这些 API 应该能够构建可以在浏览器中运行的应用程序，不需要额外的下载或插件，允许各方之间使用音频、视频和补充实时通信进行通信，而无需使用干预服务器（除非需要防火墙穿越，或用于提供中介服务）。