Usb_cam ignoring camera_frame_id [closed]

edit

I have a launch file for starting a stereo USB camera:

<launch>
    <arg name="device_left" default="/dev/video1" />
    <arg name="device_right" default="/dev/video2" />
    <arg name="width" default="320" />
    <arg name="height" default="240" />
    <arg name="format" default="yuyv" />
    <group ns="raw_stereo">
        <node name="left" pkg="usb_cam" type="usb_cam_node" output="screen">
            <param name="video_device" value="$(arg device_left)" />
            <param name="image_width" value="$(arg width)" />
            <param name="image_height" value="$(arg height)" />
            <param name="pixel_format" value="$(arg format)" />
            <param name="camera_frame_id" value="left_camera" />
            <param name="io_method" value="mmap" />
            <param name="camera_info_url" type="string" value="file://$(find stereo_slam_test)/config/usb1-config-left.yml" />
        </node>
        <node name="right" pkg="usb_cam" type="usb_cam_node" output="screen">
            <param name="video_device" value="$(arg device_right)" />
            <param name="image_width" value="$(arg width)" />
            <param name="image_height" value="$(arg height)" />
            <param name="pixel_format" value="$(arg format)" />
            <param name="camera_frame_id" value="right_camera" />
            <param name="io_method" value="mmap" />
            <param name="camera_info_url" type="string" value="file://$(find stereo_slam_test)/config/usb1-config-right.yml" />
        </node>
    </group>
</launch>

However, when I run this, I get the warnings:

[ WARN] [1431313131.230893149]: [head_camera] does not match name left_camera in file ~/git/stereo_slam_test/src/stereo_slam_test/config/usb1-config-left.yml
[ INFO] [1431313131.230983626]: Starting 'head_camera' (/dev/video1) at 320x240 via mmap (yuyv) at 30 FPS
[ INFO] [1431313131.273715224]: camera calibration URL: ~/git/stereo_slam_test/src/stereo_slam_test/config/usb1-config-right.yml
[ WARN] [1431313131.275529366]: [head_camera] does not match name right_camera in file ~/git/stereo_slam_test/src/stereo_slam_test/config/usb1-config-right.yml

Why is it using the "head_camera" frame id for both cameras when I explicitly set it to "left_camera" and "right_camera" in my launch file?

Edit: The output of rosparam get /raw_stereo:

left:
  camera_frame_id: left_camera
  camera_info_url: file:///home/chris/git/stereo_slam_test/src/stereo_slam_test/config/usb1-config-left.yml
  image_height: 240
  image_raw:
    compressed: {format: jpeg, jpeg_quality: 80, png_level: 9}
    compressedDepth: {depth_max: 10.0, depth_quantization: 100.0, png_level: 9}
    theora: {keyframe_frequency: 64, optimize_for: 1, quality: 31, target_bitrate: 800000}
  image_width: 320
  io_method: mmap
  pixel_format: yuyv
  video_device: /dev/video1
right:
  camera_frame_id: right_camera
  camera_info_url: file:///home/chris/git/stereo_slam_test/src/stereo_slam_test/config/usb1-config-right.yml
  image_height: 240
  image_raw:
    compressed: {format: jpeg, jpeg_quality: 80, png_level: 9}
    compressedDepth: {depth_max: 10.0, depth_quantization: 100.0, png_level: 9}
    theora: {keyframe_frequency: 64, optimize_for: 1, quality: 31, target_bitrate: 800000}
  image_width: 320
  io_method: mmap
  pixel_format: yuyv
  video_device: /dev/video2