ROS toolbox (ROS2 bag)

I would like to read bag files from ROS2 (.db3) format. Is it possible to do it with the current ROS toolbox as the information is serialized into cdr format?

[Daniel Montgomery]

A similar problem, but now using ros2bag from matlab R2021a, I am trying to open a ros2 bag as follows:

bag = ros2bag('pathToBag') I am getting the following error message that I dont know how to interpret

>> bag = ros2bag('D:\data\rosbag2\rosbag2_2021_07_26-14_41_47')

Loading C:\Program Files\MATLAB\R2021a\bin\win64\builtins\ros\mlros2_builtins\mwros2bag_cpp_builtinimpl.dllfailed with

error: The specified procedure could not be found.

: state not recoverable: state not recoverable

***************************************************************

In the specified folder, there are 4 files

metadata.yaml 2 KB

rosbag2_2021_07_26-14_41_47.db3 1.547 MB

rosbag2_2021_07_26-14_41_47.db3-shm 32 KB

rosbag2_2021_07_26-14_41_47.db3-wal 0 KB

I'm not sure why this is not working as I just upgraded to R2021a and installed ros toolbox

Are you able to assist me in debugging this issue?

Thanks.

[Cam Salzberger]

It's probably better to make a separate question for this issue, to keep things organized.

Answer 1

[Cam Salzberger]

Hello Jesús,

It is not possible to read data out of ROS 2 bag databases using R2020b. There is a lot of focus on ROS 2 now though, so keep an eye on future releases for this feature.

-Cam

[Cam Salzberger]

Update: As of R2021a, you can use ros2bag to read ROS 2 bag databases!

[Remo Pillat]

Thanks, Cam. The ros2bag function has been renamed to ros2bagreader.

As of R2022b, writing ROS2 bag files is also supported through the ros2bagwriter function.