Compressed bags are a new feature in C-turtle ROS.  The decompress command
does not exist in Boxturtle's rosbag.

In any case, rosbag info is the command you want to use to list the topics
in a bag.

Tim

On Sat, Jul 3, 2010 at 7:35 AM, j2eegirl <dp@zju.edu.cn> wrote:

>
> I have installed ros following the ros document.
> Now I have a bag file needed to parse. Since it is said that the decompress
> command of rosbag package  can get topic information from bag, so I install
> the rosbag package, but no decompress command found.
> Maybe my ros isn't the newest. Does anyone know the reason?  And what
> should
> I do? Thank you.
> --
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