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Hi all, i am new with ROS and I had the exiting challenge to build a lidar point cloud with a velodyne vlp-16.

I record my pacp file with tshark and now im in the ROS part. With a lot of help in this forum i achieve starting roscore and also reading the pcap file with the velodyne driver. My target is to get a .LAS file. After a couple of sample i figure that i had to convert my pcap to bag file in the process.

If at this point i'm not on the good way plz let me know :)

After many try i finaly got the recording with this:

rosrun rosbag record /velodyne_packets -O /media/lidar/math/test13.bag

[ INFO] [1512235521.473606088]: Subscribing to /velodyne_packets
[ INFO] [1512235521.542149460]: Recording to /media/lidar/math/test13.bag.

The problem is... it never ending. I can't figure what to do.

Any help is welcome, thank you

Originally posted by mathbeaudry on ROS Answers with karma: 1 on 2017-12-02

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What do you mean

it never ending.

? Do you mean that the recording doesn't stop? If that's what you mean then you can just hit Ctrl + c and that will stop the recording.

If this isn't what you mean then please update your question to provide more details.

Originally posted by jayess with karma: 6155 on 2017-12-02

This answer was ACCEPTED on the original site

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Original comments

Comment by mathbeaudry on 2017-12-02:
yes, recording doesn't stop. every time, it create my file, but test13.bag never grow more than 4.1Kb in size whatever the size of my pcap file. That's why i pretend that recording dosen't do is job.

Comment by Ruben Alves on 2017-12-05:
You have to make sure there is some node publishing on the /velodyne_packets topic, with rostopic echo /velodyne_packets, for example.