window.URL.createObjectURL(mediaStream) 出现 typeError 错误

转自：https://blog.csdn.net/Miss_Liang/article/details/85781396

window.URL.createObjectURL(mediaStream) 出现 typeError 错误的原因是

浏览器正在取消对 mediaStream 类型的支持

解决方案：

video.srcObject = mediaStream

代码示例:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <script src="jquery.min.js"></script>
    <script type="text/javascript">
        $(function () {
            var video = document.getElementById("video");
            var canvas = document.getElementById("canvas"),
                context = canvas.getContext("2d");
            var w;
            if (navigator.webkitGetUserMedia) {
                navigator.webkitGetUserMedia({ video: true }, function (stream) {
                    // 错误代码:
                    // video.src = window.webkitURL.createObjectURL(stream); // 浏览器正在取消对 createObjectURL 的支持
                    // 正确代码:
                    video.srcObject = stream; 
                    video.play();
                    w = new WebSocket(url);
                    w.onopen = function () {
                        sendImg();
                    }
                    w.onmessage = function (e) {
                        sendImg();
                    }

                }, function () {
                    console.log("video error");
                });


                var host = 'localhost';
                var port = 8888;
                var url = 'ws://' + host + ':' + port + '/';

                function sendImg() {
                    context.drawImage(video, 0, 0, 320, 320);
                    var imgData = canvas.toDataURL();
                    w.send(imgData);
                }
            }
        });
    </script>
</head>
<body>
    <video id="video" width="640" height="480" style="background:#000;" autoplay></video>
    <canvas style="display:none" id="canvas" width="320" height="320"></canvas>
</body>
</html>

 

posted @ 2019-08-17 23:15  夏秋初  阅读(2640)  评论(0)    收藏  举报