用RecordRTC 实现视频录制并添加字幕合成效果

用RecordRTC 实现视频录制并添加字幕合成效果

字幕合成效果 RecordRTC

<style>
    html, body, video, canvas {
        margin: 0!important;
        padding: 0!important;
    }
</style>

<title> RecordRTC 视频字幕合成添加</title>
<h1>RecordRTC 视频字幕合成添加</h1>
<p>10秒后自动停止录制.</p>
        <p >
    首先需要<a href="https://chrome.google.com/webstore/detail/getusermedia/nbnpcmljmiinldficickhdoaiblgkggc">安装chrome扩展</a>,注意，这需要fanqiang，如果打不开，就查看这篇文章手动安装chrome扩展,<a href="http://www.bfw.wiki//user10/15640228901296320096.html">点击查看</a>

<video id="video-preview" controls autoplay playsinline></video>
<script src="http://repo.bfw.wiki/bfwrepo/js/RecordRTC.js"></script>
<script>
var videoPreview = document.getElementById('video-preview');

navigator.mediaDevices.getUserMedia({video: true}).then(function(camera) {
    var canvas = document.createElement('canvas');
    var context = canvas.getContext('2d');

    canvas.style = 'position: absolute; top: 0; left: 0; opacity: 0; margin-top: -9999999999; margin-left: -9999999999; top: -9999999999; left: -9999999999; z-index: -1;';
...

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