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How do I know when rosbag finished? (by code - without looking at the terminal)

Hello, I'm writing a node to convert from a rosbag to a .mat file using matlab's api for this. I am subscribing to the topics contained in the rosbag and via a callback function I can read the...

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In ros gmapping, how to use Intel Research Lab dataset?

I don't know how to use the Intel Research Lab dataset (.clf). Should I read the file and publish the lase_scan and tf topic? If so,how should I do in detail? thanks.

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Interactive Marker with rosbag "ROS Time moved backwards"

I'm using rqt_bag to visualize a rosbag in RViz. Independently of that, I publish a interactive marker that changes colors based on a topic being published. This works well, until I move backwards in...

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How do you expand the displayed data in rqt_bag?

I'm playing back data from a rosbag file and I want to view the entire NMEA "GGA" sentence in real-time. However, when I try to enlarge the play-back window I get this: ![image...

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rosbag randomly missing topics on record

Hi all. We've got a very weird case. Our configuration: - main_computer: running roscore - slave_A_computer (ROS_MASTER_URI=main_computer) - slave_B_computer (ROS_MASTER_URI=main_computer) -...

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How to split a recorded rosbag file ?

Ubuntu 12.04 and fuerte I have a bag file of 400 seconds length. I would like to split it into two bag files of 150 seconds and 250 seconds. There is an option to split bag files while recording using...

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rosbag c++ API bug at execution

Hi everyone, i'm having a real weird problem with the rosbag c++ API. I'm using QtCreator to develop on Ubuntu 14.04. Whenever I try to use a class from the rosbag library (rosbag::Bag or rosbag::View...

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segfault when reading rosbag

Hi all, I'm trying to parse a rosbag file. According to the guide here, I wrote something like this: rosbag::Bag bag; std::vector topics; std::cout << "Opening " << filename_ <<...

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rosbag playback speed

Hi all, We have some sensor data that are saved as .csv files (data+timestamp) from a robot, which does not run ROS. To run some algorithms, I converted once such file into a ROS bag file using a...

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how to sync two ROS topics by adjusting the time stamp

**Actual Issue:** I have a topic published with images from a camera and another topic with details of point cloud. When I plot these two topics, there is a time lag between the two plots. Is there any...

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How to playback Rosbag pointcloud2 files

Hi, I'm currently trying to playback a rosbag file made with pointcloud2, and I can do it with the rviz software, but for my purposes, I need to be able to go back and forth in the video (like you...

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How do I append/add to a rosbag file without overwriting it in Python?

Basically I was testing recording data to a rosbag using a timestamp. I noticed that every time I open and close the file it just rewrites the data, so I just leave the file open when the program...

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rosbag only record at edge trigger

Hi, Is it possbile to have rosbag only record a topic when this topic has a certain value, e.g. 0, 1, 2 and ignore 0.1 - 0.9, 1.1 - 1.9, etc. to reduce the amount of data being recorded? Thanks.

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How to convert Rosbag Pointcloud2 to Mp4

So I have a bunch of rosbag files that only contain a pointcloud2 topic. I need to be play through these, and have accurate times for them, because I'm using them to tag data. This means the typical...

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When will rosbag::Player be released?

Hi all, I just found out about rosbag functionality and would very much like to add playback buttons to an application I'm currently writing. I've found the rosbag::Player class. Documentation states:...

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De-noise images in rosbag

I have a rosbag with a bunch of IMU measurements and image data. In order to use the FAST detector of OpenCV, I want to de-noise my image data. For this I would preferably use OpenCV (C++ or Python)....

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rosbag in launch file not saving properly

I can successfully save data through command line tools (rosbag record -O mybag.bag /state) but when I convert this to a launch file implementation it does not save the "mybag.bag" file properly or I...

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How to convert sick lms logged data .log to rosbag file .bag

Hi, ROS users, I am quite new to ROS. Now I have a question cannot solve, please help me, sincerely. Now I want to use Gmapping to make 2D grid occupancy map using logged SICK LMS data. I think the...

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Automated rosbag on start up

My plan is to use a remote computer to create a rosbag. I was wondering what is the best practice to automatically start a rosbag record instance after boot on an Ubuntu 14.04 Odroid system. Any...

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Exporting jpegs from bag file

I record my bag file using this command: rosbag record /camera/rgb/image_raw -O kinectrgb And rosbag info kinectrgb.bag For its content I get this: path: kinectrgb.bag version: 2.0 duration: 6.2s...

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