rosbag: Rosbag meta data

[ablasdel]

Is there a way to extend the bag file format with a description field that explains how the data was achieved/recorded. Or at least a link to a document that gives this details. I was thinking of something like:

rosbag record /tf -m "this was recorded for IROS paper 2011 with active and female test person, more info in bag_specs.txt"

Or even a:

--detail-file="_bag_specs.txt"

Perhaps there is such a functionality that I'm not aware of? (and no I don't want to be putting this into a topic which is also recorded)

Which files would be affected?

See:

http://answers.ros.org/question/350/rosbag-meta-data

migration of ticket 3426: https://code.ros.org/trac/ros/ticket/3426

[NikolausDemmel]

Just for future reference: By now there is a tool that does something like this built ontop of rosbag, but it does indeed put the info into an extra topic.

http://rosbag-metadata.readthedocs.io/en/latest/