Rosbag splitter

Pure python script to easily split rosbag from commandline. This script is made to cut rosbags without having to install ros and also to allow cutting bags without knowing the UNIX timestamps of the starting and end times.

Requirements

The requirements are managed by poetry and can be seen in the pyproject.toml file. To install the dependencies, install poetry and then run

git clone https://github.com/UkuKert/rosbag_splitter.git 
cd rosbag_splitter
sudo apt update && sudo apt install liblz4-dev
poetry install 

Usage

The following example takes a bag called "input_bag.bag" as an input and makes a 5 second small bag from 20s - 25s and saves that to "small_bag.bag". Note The input bag is preserved.

poetry run python3  rosbag_splitter.py  -i  input_bag.bag -o small_bag.bag -b 20 -e 25

The following example takes a bag called "input_bag.bag" as an input and saves the first 25 seconds of it to "input_bag_cut.bag". Note When begin time is not specified it is assumed to be 0. When output bag is not specified a new name is created with the suffix "_cut" added to the input bag path root.

poetry run python3  rosbag_splitter.py -i input_bag.bag -e 25

For more help run the script with the argument "-h"

poetry run python3  rosbag_splitter.py  rosbag_splitter.py -h

Development

We are using RUFF for static formatting and linting. Use the Makefile to run the linter and formatter:

make fmt
make lint