Unable to connect to multiple cameras simultaneously using index

[joshvillbrandt]

I implemented the missing index functionality (libuvc #36, libuvc_ros #27) and am able to select a camera with an index. However, when I try to launch two instances of libuvc_camera simultaneously, the libuvc_camera instance that was started second always gets hung up somewhere in uvc_start_streaming(). Any ideas?

My launch file looks like this:

<?xml version="1.0"?>

<launch>
  <arg name="width" default="1280" />
  <arg name="height" default="720" />
  <arg name="video_mode" default="mjpeg" />
  <arg name="frame_rate" default="60" />

  <!-- start the left camera -->
  <node pkg="libuvc_camera" type="camera_node" name="left" ns="stereo/left">

    <!-- Parameters used to find the camera -->
    <param name="vendor" value="0x05a3"/>
    <param name="product" value="0x9230"/>
    <param name="index" value="0"/>

    <!-- Image size and type -->
    <param name="width" value="$(arg width)"/>
    <param name="height" value="$(arg height)"/>
    <param name="video_mode" value="$(arg video_mode)"/>
    <param name="frame_rate" value="$(arg frame_rate)"/>
  </node>

  <!-- start the right camera -->
  <node pkg="libuvc_camera" type="camera_node" name="right" ns="stereo/right">

    <!-- Parameters used to find the camera -->
    <param name="vendor" value="0x05a3"/>
    <param name="product" value="0x9230"/>
    <param name="index" value="1"/>

    <!-- Image size and type -->
    <param name="width" value="$(arg width)"/>
    <param name="height" value="$(arg height)"/>
    <param name="video_mode" value="$(arg video_mode)"/>
    <param name="frame_rate" value="$(arg frame_rate)"/>
  </node>
</launch>

[joshvillbrandt]

I have verified that both of the node sections in the previously mentioned launch file work independently. I also also verified that both camera work simultaneously with identical video settings using different drivers (so USB bus bandwidth shouldn't be the problem.)

[cyborg-x1]

I can confirm this as well, I have two cheap chinese laptop camera modules here, both with serial set to 0, even if index is set differently it does always try to open the same camera.

[stwirth]

Same for me. I've connected four cameras (all same vendor/product) and cannot select them by index. The driver always opens the first one. Even invalid indices (like 100) don't given an error.

[givip]

Same for me, anything changed after 3 years?

[gr8jam]

I am also interested if any progress was made regarding this topic.