I have 2 webcams and custom node to synconize images.

vslam config

<launch>

  <!-- Run stereo VSLAM on wide stereo data -->
  <group ns="wide_stereo">
    <node name="stereo_vslam_node" pkg="vslam_system"
type="stereo_vslam_node" args="$(find vocabulary_tree)/holidays.tree $(find
vocabulary_tree)/holidays.weights $(find vslam_system)/data/calonder.rtc"
output="screen" cwd="node" >

      <remap from="left/image_rect" to="/sync/left_camera/image" />
      <remap from="left/camera_info" to="/sync/left_camera/camera_info" />

     <remap from="right/image_rect" to="/sync/right_camera/image" />
     <remap from="right/camera_info" to="/sync/right_camera/camera_info" />

 </node>

 </group>

  <!-- Show VO tracks -->
  <node name="vo_tracks_view" pkg="image_view" type="image_view">
    <remap from="image" to="/vslam/vo_tracks/image" />
  </node>


</launch>

vslam node dies in a few seconds after start (see attached file).
vslam was install from repository (unstable)

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