求ros-noetic-libuvc_camera功能包调用单USB双目摄像头方案

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<launch>
<group ns="camera">
<node pkg="libuvc_camera" type="camera_node" name="mycam">
<!-- Parameters used to find the camera -->
<param name="vendor" value="0x0"/>
<param name="product" value="0x0"/>
<param name="serial" value=""/>
<!-- If the above parameters aren't unique, choose the first match: -->
<param name="index" value="0"/>

  <!-- Image size and type -->
  <param name="width" value="640"/>
  <param name="height" value="480"/>
  <!-- choose whichever uncompressed format the camera supports: -->
  <param name="video_mode" value="uncompressed"/> <!-- or yuyv/nv12/mjpeg -->
  <param name="frame_rate" value="15"/>

  <param name="timestamp_method" value="start"/> <!-- start of frame -->
  <param name="camera_info_url" value="file:///tmp/cam.yaml"/>

  <param name="auto_exposure" value="3"/> <!-- use aperture_priority auto exposure -->
  <param name="auto_white_balance" value="false"/>
</node>

</group>
</launch>
官方给的示例貌似是只能调用一个单目的摄像头
我想调用双目摄像头，该如何实现，我的双目摄像头是单usb线