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ROS2 rosbag2 read bag file

asked 2020-11-16 12:33:29 -0500

waspinator
122 ●18 ●23 ●28

updated 2020-11-16 13:04:42 -0500

I recorded data using ros2 bag record --all --output test.bag in ROS2 Foxy. In ROS1 I could read the bag contents using something like:

import rosbag
bag = rosbag.Bag('test.bag')
for topic, msg, t in bag.read_messages(topics=['chatter', 'numbers']):
    print(msg)
bag.close()

What is the ROS2 equivalent code?

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answered 2020-11-16 15:35:17 -0500

soldierofhell
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I've searched recently and found nothing but tests, but they should be enough for your needs.

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I have been trying to do this with ros eloquent. I am unable to deserialize when importing from rclpy.serialization import deserialize_message tells me that rclpy does not have serialization

wilkinsaf ( 2021-05-04 11:41:19 -0500 )edit

It's not available in Eloquent and Foxy, you have to install Rolling/Galactic

soldierofhell ( 2021-05-04 15:48:01 -0500 )edit

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Asked: 2020-11-16 12:33:29 -0500

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Last updated: Nov 16 '20

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ROS2 rosbag2 read bag file