Thanks for the code contribution and the ticket, Bill.

Allowing rosbag record & play to be controlled through a ROS API is a
feature we will definitely be including in Diamondback.

Tim

On Tue, Jul 27, 2010 at 11:39 AM, Bill Morris <morris@ee.ccny.cuny.edu>wrote:

> I put together a patch for 'rosbag record' that provides a client/server
> interface. The patch was created using svn diff.
>
> The current status of rosbag record can be obtained by calling the
> get_status service which provides the name of the current bag file being
> recorded, the recording status and a list of the topics being recorded.
> $ rosservice call /record_1280253194863995182/get_status
> target_filename: foo_2010-07-27-13-53-14.bag
> write_filename: foo_2010-07-27-13-53-14.bag.active
> writing_enabled: True
> topics: ['/chatter', '/rosout', '/rosout_agg']
>
> Calling set_status to set writing_enabled to False provides a means of
> pausing the recording of data to the current bag file.
> $ rosservice call /record_1280253194863995182/set_status False
> success: True
>
> Here the updated status is shown in a another call to get_status
> $ rosservice call /record_1280253194863995182/get_status
> target_filename: foo_2010-07-27-13-53-14.bag
> write_filename: foo_2010-07-27-13-53-14.bag.active
> writing_enabled: False
> topics: ['/chatter', '/rosout', '/rosout_agg']
>
> Setting writing_enabled to true will resume logging.
> $ rosservice call /record_1280253194863995182/set_status True
> success: True
>
> The output of rosbag record will look something like this
> $ rosbag record -a -o foo
> [ INFO] [1280253741.079472070]: Recording to
> foo_2010-07-27-14-02-21.bag.
> [ INFO] [1280253742.087486427]: Subscribing to /chatter
> [ INFO] [1280253742.093223888]: Subscribing to /rosout
> [ INFO] [1280253742.098384181]: Subscribing to /rosout_agg
> [ INFO] [1280253772.239637479]: disabling message logging
> [ WARN] [1280253772.240439047]: Not logging message because logging
> disabled.  Most likely cause is a full disk.
> [ WARN] [1280253777.650501980]: Not logging message because logging
> disabled.  Most likely cause is a full disk.
> [ INFO] [1280253784.865028834]: enabling message logging
>
>
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