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I have a bunch of rosbag1 bag files with images, velodyne point clouds, and radar point clouds. I've now attempted a couple different methods of playing rosbag1 files in rosbag2, such as rosbag_v2 and rosbags-convert.

Both of which can run the bag files, sometimes with warnings like

[WARN] [1631782330.814976392] [rosbag2_transport]: Ignoring a topic '/rosout', reason: Something went wrong loading the typesupport library for message type rosgraph_msgs/Log. Library could not be found..

but the right topics get published.

Attempting to visualize any of the three (camera, lidar, or radar) results in rviz2 throwing a lot of

[INFO] [1631782411.735610318] [rviz]: Message Filter dropping message: frame 'usb_cam' at time 1624791621.995 for reason 'Unknown'

I'm not sure how to handle this?

Note: Using noetic and foxy on ubuntu 20.04

Originally posted by morten on ROS Answers with karma: 198 on 2021-09-16

Post score: 0

Original comments

Comment by Ranjit Kathiriya on 2021-09-16:
You are missing the time stamp, you need to add it and I think it will work.

Comment by morten on 2021-09-16:
I'm reading from a data file of past recordings, which has been used in ros1 implementations. I don't have the possibility of adding or changing the content.


1 Answer 1


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In this case, the conversion utilizing rosbags-convert and then playing the bag file by ros2 bag play /path/to/file.bag works fine.

The problem was relating to the lack of some static transform publishers between the frames, e.g. usb_cam, which then resulted in the filter dropping effected messages.

Note: The warning regarding /rosout persists and doesn't seem to be relevant and/or signalling anything critical. Everything works as expected after sorting out the missing transforms.

Originally posted by morten with karma: 198 on 2021-09-22

This answer was ACCEPTED on the original site

Post score: 1


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