以视频形式记录事件时，我在应用程序中使用RecordRTC。我现在的问题是我想对视频进行放大和缩小。无论如何，我可以在RecordRTC中做到吗？
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</div>
<div id="counter" class="video-counter">
</div>
<video id="gum" class="video-content" width="100%" height="auto" playsinline autoplay muted></video>
<div class="demo-wrapper html5-progress-bar">
<div id="myProgress">
<div id="myBar"></div>
</div>
</div>
<a class="btn zoom"><i class="fas fa-search-plus"></i></a>
<a class="btn zoom-out"><i class="fas fa-search-minus"></i></a>
</div>
JS在这里：https://recordrtc.org/RecordRTC.js.html
请让我知道在RecordRTC中这是否可行。我在网上找不到关于它的任何样本。