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How to playback pointcloud in rviz which was recorded using rosbag

asked 2013-08-11 23:01:02 -0500

ljk gravatar image

updated 2016-10-24 08:59:29 -0500

ngrennan gravatar image

Hi my friends, I am quite new to ROS and pointcloud. I am running some experiments with pointcloud using kinect.

after running roslaunch openni_launch openni.launch and rosbag record /camera/depth/points for a few seconds, i terminate the recording and get a .bag file in /bagfile. Now i want to play back the .bag file and visualize it in rviz. Any clue how to achieve this? Thanks a lot for your kind instruction!

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answered 2013-08-11 23:18:33 -0500

fergs gravatar image

You'll want to set use_sim_time to true (do this BEFORE starting rviz):

rosparam set use_sim_time true

Then use rosbag, and republish the clock:

rosbag play name_of_bagfile.bag --clock
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Thanks fergs! It works! btw, it should be " /user_sim_time"

ljk gravatar imageljk ( 2013-08-12 03:29:40 -0500 )edit
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No, it should be use_sim_time, just as @fergs wrote.

Martin Günther gravatar imageMartin Günther ( 2013-08-12 04:47:17 -0500 )edit

sorry~~my fault, should be "use_sim_time" or "/use_sim_time" ,both are fine

ljk gravatar imageljk ( 2013-08-13 00:12:48 -0500 )edit

Do you mean that first 'rosparam set use_sim_time true' and then run rviz and then 'rosbag play name_of_bagfile.bag --clock'? I do the same procedure but cant play back the data. Furthermore, my rosbag record just record only 2 seconds for the kinect. How can I fix it? Thanks a lot.

Battery gravatar imageBattery ( 2013-11-08 01:58:34 -0500 )edit

Yes, rosrun rviz rviz after setting param true. What I do is,run as above, quickly set the topic, then run the bag again and the topic will show as expected inside rviz. You have a bag that was recorded for 2s - dont set the time and you can record as long as you like: rosbag record -O subset /topic

kleinsplash gravatar imagekleinsplash ( 2014-02-09 22:44:37 -0500 )edit

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Asked: 2013-08-11 23:01:02 -0500

Seen: 7,575 times

Last updated: Aug 11 '13