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I'm trying to do so, but when I try to play back, rosbag shows this error:
[FATAL] [1338427215.385261009]: Time is out of dual 32-bit range
This happens regardless how long I record data. When recording the whole topic all goes fine.
I have tried to record both the desired fields and the topic time stamp, but I get the same error.
Many thanks.
Rosbag can only record full topics, not only some fields from a topic. However, if for some reason you want to omit some fields from a recorded bag file, you can use rosbag's Code API, which is pretty amazing. It should take less than 10 lines of code to filter a "full" bag file, drop some fields, and write the result a second (reduced) bag file.
when I try to play back, rosbag shows this error: [FATAL] [1338427215.385261009]: Time is out of dual 32-bit range
Yes, that error message is not very intuitive. :-)
What's happening is this: When you do, say:
rosbag record /scan/ranges
... rosbag thinks that you want to record the topic /scan/ranges, but that doesn't exist ("ranges" is a field of topic "scan"). That means that your resulting rosbag will be empty, and that is what the error message really means. It's misleading though, and I filed a bug report here.
The bug which caused that weird error message has been fixed. The update will be included in ros-comm 1.8.14. Then you will see a reasonable message like "No messages to play".
Asked: 2012-05-30 15:28:05 -0500
Seen: 3,714 times
Last updated: Jul 03 '12
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Can you show the parameters you used for rosbag?
nothing special; just "rosbag record <topic name>/<field name>"