Skip to main content

Compare topics between rosbags

Project description


Compare the topic content between rosbags

Say you have a bunch of rosbags inside a folder and you don't know whether or not all those rosbags have the same topics. rosbag-compare will :

  • retrieve the topics contained in each rosbag
  • export a summary of the ros topics in a JSON file
  • plot the topics that are missing for each rosbag :

Summary of missing topics


rosbag-compare can be installed from PyPi :

$ pip install rosbag-compare


rosbag-compare can be used both as a command line application and in Python code.

Command line

A basic use of rosbag-compare is to simply call it with the path of the folder that contains rosbags. This will simply generate a JSON file with a summary of the comparison in topics_<name-of-bagfolder>.json.

$ rosbag-compare -b /path/to/folder/with/rosbags

You can also generate a figure that will show what topics are missing in each rosbag with the --plot/-p flag. This figure helps when you want to find out if all rosbags of your experiment contains the topics that are of your interest.

$ rosbag-compare -b /path/to/folder/with/rosbags -p

In Python

You can also call rosbag-compare directly into your Python code :

from rosbag_compare import RosbagComparator

data_path = "/path/to/folder/with/rosbags"
rbag_comp = RosbagComparator(data_path)

# This step may take time as it open each rosbag separately
# Will show a progress bar

# Export summary to a JSON file
rbag_comp.to_json()  # Defaults to topics_<foldername>.json

# Generate a figure with the name of the
# missing topics for each rosbag
rbag_comp.plot()                                              # Show figure
rbag_comp.plot(save_fig=True)                                 # Save figure (defaults to missing_topics.png)
rbag_comp.plot(save_fig=True, img_path="topics_summary.jpg")  # Save figure to path


Pull requests are welcome and don't hesitate to open issues

Development requirements can be installed using pip :

$ python -m venv venv
$ source venv/bin/activate
$ pip install -r requirements/requirements-dev.txt


This project is licensed under a MIT license

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

rosbag-compare-0.1.0.tar.gz (6.0 kB view hashes)

Uploaded source

Built Distribution

rosbag_compare-0.1.0-py3-none-any.whl (6.8 kB view hashes)

Uploaded py3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page