<xr-asset-load

      type="video-texture" asset-id="test2" options="loop:true,placeHolder:/images/qqq.jpg,autoPlay:true"

      src="https://wl.jlrhzn.com/hjsy/upload/2024/05/07/e0f019f3e38b49edb56f13b8cb9a6344/e0f019f3e38b49edb56f13b8cb9a6344.mp4"

    />

    <xr-asset-material asset-id="removeBlack-mat" effect="removeBlack"  />   <!-- 识别图片 -->

    <xr-ar-tracker id="ar-tracker" mode="Marker" src="/images/qqq.jpg" bind:ar-tracker-state="handleARTrackerState1">

      <xr-mesh node-id="video-item" geometry="plane" position="0 0 0.13" scale="0.55 0.52 0.5" material="removeBlack-mat" uniforms="u_videoMap: video-test2" />

    </xr-ar-tracker>

扫描识别图 播放视频 占位图不消失是什么情况