ROS1 to ROS2 Bag Conversion Guide
rosbags is the simplest utility which does not depend on ROS installs at all. ROS bag conversion is a hard problem since you need to have both ROS1 and ROS2 dependencies. This is what was used to generate the converted ROS2 bag files for standard datasets. To do a conversion of a bag file we can do the following:
pip install rosbags rosbags-convert V1_01_easy.bag
To do this conversion you will need to have both ROS1 and ROS2 installed on your system. Also ensure that you have installed all dependencies and backends required. The main rosbag2 readme has a lot of good details.
sudo apt-get install ros-$ROS2_DISTRO-ros2bag ros-$ROS2_DISTRO-rosbag2* sudo apt install ros-$ROS2_DISTRO-rosbag2-bag-v2-plugins
From here we can do the following. This is based on this issue. You might run into issues with the .so files being corrupted (see this issue) Not sure if there is a fix besides building it from scratch yourself.
source_ros1 source_ros2 ros2 bag play -s rosbag_v2 V1_01_easy.bag