[ros-users] Can not send kinect recorded bag to image_view

[Eric Perko]

On Fri, Dec 3, 2010 at 8:40 PM, Chris Brown <chrisneilbrown at gmail.com>wrote:

> Eric,
>
> I'm republishing because I want process the data into a point cloud data,
> which I have no idea how to do, where should I start?
> I dont have a kinect to play with. To fix it I had to make this change
>
> -pub.publish(Image(msg))
> +pub.publish(msg)
>
> works now
>

What I was getting at was that you don't have to do the republishing of the
depth image from the bag file yourself - rosbag play already does it for
you. Doesn't the kinect driver already output a point cloud? Seems to
according to http://www.ros.org/wiki/kinect_camera . You may want to see
about finding a different bag file that includes that information.

- Eric


>
>
> On Sat, Dec 4, 2010 at 12:20 PM, Eric Perko <wisesage5001 at gmail.com>wrote:
>
>> Chris,
>>
>> To just playback a bagfile to a rosnode such as image_view, there is no
>> need to write a script that uses the rosbag API. Take a look at this
>> tutorial:
>> http://www.ros.org/wiki/rosbag/Tutorials/Recording%20and%20playing%20back%20data
>>
>>
>> <http://www.ros.org/wiki/rosbag/Tutorials/Recording%20and%20playing%20back%20data>For
>> your specific case, you would want to use the following two commands (or
>> something very close to them) after starting a roscore:
>>
>> 1. rosbag play /home/chris/bagfiles/kinectDepthVideo.bag
>> 2. rosrun image_view image_view image:=/kinect/depth/image_raw
>>
>> That should be about all you need to do, no need to read from the bagfile
>> using Python and then republish messages yourself.
>>
>> - Eric
>>
>> On Fri, Dec 3, 2010 at 7:00 PM, Chris Brown <chrisneilbrown at gmail.com>wrote:
>>
>>> I get this error
>>>
>>>   File "/home/chris/ros/ros/core/roslib/src/roslib/message.py", line 301,
>>> in __init__
>>>     raise TypeError, "Invalid number of arguments, args should be
>>> %s"%str(self.__slots__)+" args are"+str(args)
>>> TypeError: Invalid number of arguments, args should be ['header',
>>> 'height', 'width', 'encoding', 'is_bigendian', 'step', 'data'] args
>>> are(header:
>>>   seq: 0
>>>   stamp:
>>>     secs: 1290467094
>>>     nsecs: 328996057
>>>   frame_id: /kinect_depth
>>> height: 480
>>> width: 640
>>> encoding: mono8
>>> is_bigendian: 0
>>> step: 640
>>> data:
>>> ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿýýÿýÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿýýÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿýÿùùÿÿùõýõÿÿýýÿÿÿÿÿýùùõùùùùùùùùÿÿÿÿýÿýýùùùùýÿÿÿÿÿýýùùùùùùùýýýýýùõõõõõùõùùùùõõõõõùùõõõõõõõõõõõõõõõõõõññõññññññññññññññññññõñññññññíññññññññññõõõõÿÿÿÿÿÿÿÿÿõõñññíííééééñññññññññññññíññññññññííííí
>>>
>>> I'm sure I'm trying to publish send_msg/Image data to image_view which
>>> accepts the data
>>>
>>> rosbag info ~/bagfiles/kinectDepthVideo.bag
>>> path:        /home/chris/bagfiles/kinectDepthVideo.bag
>>> version:     2.0
>>> duration:    25.1s
>>> start:       Nov 23 2010 10:04:54.33 (1290467094.33)
>>> end:         Nov 23 2010 10:05:19.43 (1290467119.43)
>>> size:        220.7 MB
>>> messages:    753
>>> compression: none [251/251 chunks]
>>> types:       sensor_msgs/Image [060021388200f6f0f447d0fcd9c64743]
>>> topics:      /kinect/depth/image_raw   753 msgs @ 29.8 Hz :
>>> sensor_msgs/Image
>>>
>>>
>>> _______________________________________________
>>> ros-users mailing list
>>> ros-users at code.ros.org
>>> https://code.ros.org/mailman/listinfo/ros-users
>>>
>>>
>>
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>
>
> --
> Chris
> Aluminium Replacement Parts <http://arp.chrisb.id.au/>
> @arpartsau <http://twitter.com/arpartsau>
>
>
>
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