ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange

Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

14

How do you remap a topic?

asked 2011-03-01 00:36:37 -0600

Benoit Larochelle

flag of Germany

867 ●27 ●36 ●48

updated 2011-11-17 16:26:01 -0600

flag of United States of America

4119 ●27 ●62 ●83 http://www.cs.duke.edu/~mac

How to remap a topic name?

1) From a launch file?
2) From a bag file?

For example, I have a .bag file that publishes to a topic "foo" and I would like remap it to "bar", because another node expects the topic "bar".

edit retag flag offensive close merge delete

1 Answer

Sort by » oldest newest most voted

38

answered 2011-03-01 01:46:27 -0600

Dan Lazewatsky
9115 ●79 ●103 ●160 http://dan.lazewatsky.com/

1) The remap tag lets you remap topics in launch files.

2) rosbag play is a node just like any other and its published topics can be remapped in the same way as any other node. For example, if I have a bag file publishing a laser scan on /base_scan, but I want it on /scan, I can do rosbag play my_bag.bag /base_scan:=/scan

edit flag offensive delete link

Comments

1

I think it is also necessary for the previous and the new topic to publish message of the same type for remap to work.

warriorUSP ( 2018-07-06 13:32:33 -0600 )edit

Is it possible to do it on command line?

parzival ( 2019-06-06 07:09:22 -0600 )edit

1

rosbag play my_bag.bag /base_scan:=/scan should work

rfeistenauer ( 2019-11-15 05:06:22 -0600 )edit

In case someone runs into the issue while running ROS2, just add the --remap flag before remapping. Credit.

$ ros2 bag play my_bag2.db3 --remap /base_scan:=/scan

sgarciav ( 2022-06-15 22:47:11 -0600 )edit

Question Tools

4 followers

Stats

Asked: 2011-03-01 00:36:37 -0600

Seen: 63,571 times

Last updated: Nov 17 '11

Related questions

ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.

Powered by Askbot version 0.10.2