convert 'tf/tfMessage' from ROS1 rosbag to ROS2 'tf2_msgs/msg/TFMessage', show nothing

[EgalYue]

Hi,
I met one problem, when I want to get /tf message from my rosbag or from TUM dataset rosbag?

I installed and built ros1_bridge from source.
I run this in a docker container:
ros2: dashing (using the provided debs)
ros1: melodic (using the provided debs)

The following are my steps:
Step 1: Open shell 1:

. /opt/ros/melodic/setup.bash
. /opt/ros/dashing/setup.bash
. ./bridge_ws/install/setup.bash
ros2 bag info -s rosbag_v2 rgbd_dataset_freiburg1_rpy.bag
ros2 bag play -s rosbag_v2 rgbd_dataset_freiburg1_rpy.bag

And the type of /tf topic is tf2_msgs/msg/TFMessage, it looks ok.

Step 2: Open shell 2:

. /opt/ros/melodic/setup.bash
. /opt/ros/dashing/setup.bash
. ./bridge_ws/install/setup.bash
ros2 topic list
ros2 topic echo /tf

topic /tf showed nothing!

Please help !
Thank you!

[dirk-thomas]

I am not sure if you have seen the ROS support guidelines but we kindly ask to raise questions like this on answers.ros.org instead.

The rational for asking all kind of questions in a single place is:

• There are many more people reading questions there so your chances on getting an answer and in a timely manner are much higher.
• In the future other users will search there for similar problems and can find your question and the potential answers.
• The issue tracker in this repo is used to track bugs, feature requests, etc. But your question is not such an action item.

Therefore I will close this ticket here for now. If you have asked your question on answers.ros.org please feel free to add a link to the question to this ticket so that future readers can find the related question.