Hi rodolfo
try this :
<launch>
<include file="$(find rtabmap_ros)/launch/rtabmap.launch">
<arg name="rtabmap_args" value="--delete_db_on_start"/>
<arg name="left_image_topic" value="/camera/infra1/image_rect_raw"/>
<arg name="right_image_topic" value="/camera/infra2/image_rect_raw"/>
<arg name="left_camera_info_topic" value="/camera/infra1/camera_info"/>
<arg name="right_camera_info_topic" value="/camera/infra2/camera_info"/>
<arg name="stereo" value="true"/>
</include>
</launch>
TOM SMITH