[ros-users] Correct way to start rosbag play in launch file?

[Patrick Bouffard]

Thanks Jeremy. Aside from the option flags though, do you have any
suggestions on how to workaround the fatal error?

Pat

On Wed, Jun 9, 2010 at 12:13 AM, Jeremy Leibs <leibs at willowgarage.com> wrote:
> Yes, this is an oversight in the rosbag package.  The play node should
> use the new flags, not the old flags.
>
> I consider this to be a bug and we should have a fix in place for the
> next patch release of ROS we push out.
>
> On Tue, Jun 8, 2010 at 11:59 PM, Patrick Bouffard
> <bouffard at eecs.berkeley.edu> wrote:
>> In boxturtle I was able to create launch files that were used to
>> replay sensor data through algorithms. I would do something like this:
>>
>> <node pkg="rosbag" type="rosbag" name="rosbag" args="play -s 10
>> --clock /path/to/bagfile.bag" />
>>
>> However with cturtle this no longer seems to work. "rosbag" does not
>> appear to be a recognized node type of the rosbag package. Instead it
>> recognizes type="play", however it seems that the commandline
>> arguments are back to the old, "rosplay" style (i.e. for the above the
>> options would be '-t 10 -b'). If I do this:
>>
>> <node pkg="rosbag" type="play" name="rosbag" args="play -t 10 -b
>> /path/to/bagfile.bag" />
>>
>> .. it no longer complains about the options but I still get:
>>
>> [ INFO] [0.000000000]: Opening /path/to/bagfile.bag
>> [ INFO] [0.000000000]: Opening __name:=rosbag
>> [FATAL] [0.000000000]: Error opening file: __name:=rosbag
>>
>> What is the 'correct' way to start rosbag play with options from
>> within a launch file, specifically in cturtle and also in boxturtle,
>> if what I had started with above is not advised?
>>
>> Thanks,
>> Pat
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