Dirk, I am not sure I understand your point. So, if I'd like port message_filter which is originally in https://github.com/ros/ros_comm, you mean create a ros2 branch in ros_comm or create a directory under an existing ROS2 repo such as rclutils? Actually, ros_comm ROS package include some other stuffs, e.g client libraries and introspect tools which were already into ROS2, under different repos. However , message_filter which is under ros_comm/message_filter have not ported yet. Can you point the direction more clearly how to port message_filter from ros_comm/message_filter to ros2, which repo should it stay? thanks. --- [Visit Topic](https://discourse.ros.org/t/syncronized-callbacks-in-ros2/2015/18) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: