AR.js：我不想同时跟踪多个标记

Question

我正在使用AR.js，即使摄像机正在跟踪几个不同的标记，我也希望仅跟踪一张图像以在其上放置视频。

我无法通过大量搜索找到解决方案。

有什么解决办法吗？

谢谢！

<a-scene embedded arjs="debugUIEnabled: false" vr-mode-ui="enabled: false">

    <a-assets >
       <video autoplay muted id="vid" loop="true" crossorigin webkit-playsinline playsinline controls>
          <source  type="video/mp4"  src="video/ar.mp4">
          <h3>Error : Your browser does not support.</h3>
         <!-- FOR NOTMAL VIDEO YOU CAN USE MP4 or WEBM BUT FOR ALPHA VIDEO YOU NEED TO USE .WEBM FORMAT-->
       </video>
       <video autoplay muted id="vid2" loop="true" crossorigin webkit-playsinline playsinline controls>
          <source  type="video/mp4"  src="video/ar2.mp4">
          <h3>Error : Your browser does not support.</h3>
         <!-- FOR NOTMAL VIDEO YOU CAN USE MP4 or WEBM BUT FOR ALPHA VIDEO YOU NEED TO USE .WEBM FORMAT-->
       </video>
    </a-assets>


    <a-marker crossorigin="anonymous" id="memarker" type="pattern" url="pattern-marker.patt" vidhandler>
       <a-plane  position='0 0 0' scale="4.8 2.7 0" rotation="-90 0 0" material='transparent:true;alphaTest:0;src:#vid'></a-plane>
    </a-marker>

    <a-marker crossorigin="anonymous" id="memarker" type="pattern" url="pattern-marker2.patt" vidhandler2>
       <a-plane  position='0 0 0' scale="4.8 2.7 0" rotation="-90 0 0" material='transparent:true;alphaTest:0;src:#vid2'></a-plane>
    </a-marker>

    <a-entity camera></a-entity>
  </a-scene>