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I am writing data of turtlebot movement, and I want to write a paper. How can...

Hello. I am a ROS beginner. I am doing SLAM of turtlebot 2 in the ubuntu 14.04, ros (indigo) personal computer environment. I need the following data to write a paper. How can I get the data? (In...

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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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Gazebo rosbag usage

Dear all, I have a simulation environment on Gazebo and want to be able to reproduce the behaviour of one robot in different simulations. Already am recording a rosbag while controlling a robot on a...

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precise timing with rosbag or an alternative

The beginner's [tutorial](http://wiki.ros.org/ROS/Tutorials/Recording%20and%20playing%20back%20data) reads, that `rosbag` may be not precise when it comes to the timing. Some tasks I face are not...

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undefined reference to everything

Hi, I have a package in my workspace that uses openCV and cv_bridge. I needed the cuda module of openCV, but it doesn't exist in the default openCV of ROS. I installed another version of openCV that...

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postprocessing bag with transform node

Hi, I have recorded a bag file from a robot (not simulated!) that contains raw sensor data that is in this state not usable by other nodes I require. I also have a node that would on the robot perform...

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How to remove a TF from a ROS bag?

I have a bag that contains a large TF tree where one TF (base_link->virtual_cam) was calculated based on several TFs and parameters. I would like to replay this bag without this generated TF in...

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How to save image topics of Full-HD size with ROSBag

Hello. I'm trying to save image topic from Full-HD image camera. I ran my camera package on my pc. The publisher have 5 size of queue. I have used `ImageTransport` for publisher. the resolution of a...

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[Python][Rosbag] Written rosbag has same start and end dates - All topics are...

Hello everyone, I've been running around code APIs, forums and other wells of knowledge but I can't find the solution to my problem. Here's what I want to do: - open a .mat file (Done) - read the...

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Bag created with rosbag api is not publishing

I am new to ROS. I am attempting to take pointcloud data that is in a format not compatible with ROS and convert it to a ROS bag using the C++ rosbag API. I am having an issue with the newly created...

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Creating an array/list of existing message type without defining custom...

Is there a way to create an array of an existing message type without defining another message type? As a use-case, say you have many `.bag` files, each with a username. You compile them into a summary...

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rosbag play - skip every Nth file

Hi, I have a bag with X images, and messages. I want to test if rtabmap odometry can handle images at different frame rates (e.g. using half the frames) Is it possible to play the bag in a way that...

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Record bag file for use with time synchronizer

I've been testing an algorithm using the EuRoC dataset. The dataset publishes synchronized camera images from two cameras along with IMU data. My application uses a TimeSynchronizer to process both...

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rqt_image_view look at only one image

Hi I have a rosbag with images and with rqt_image_view I can see them, but only the whole bag at once. Is there a way to look at one image for several secondes/minutes? Now the images are like a video,...

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Rosbags saving empty messages

I am trying to record data from data from a Razor 9DOF imu, Hokuyo LIDAR and a ZED camera. The code compiles and runs fine but it is saving empty messages to the rosbag file. I have tried printing...

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How to control rosbag record from a topic?

Hello ROS Community, I am learning how to use ROS for controlling a UAV and have not been able to find any examples on how I might approach this properly. I'm not from a software engineering background...

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Data Error with Pepperl Fuchs R2000 with ROS kinetic

Dear friends, I've encountered some wrong data with Pepperl Fuchs R2000 with ROS kinetic, below are the details. Environment: System: Ubuntu 16.04 Lts(virtual machine) hardware: Intel Core I7-7700HQ(2...

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Rosbag record dying after bag reaches 4.3GB

Hello, I am using an Nvidia TX2 with a set of 3 cameras and a Pixhawk flight controller. I am attempting to record 3x 4k image streams and IMU data from the Pixhawk. The issue I am having is that...

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Duplicate messages using `rostopic echo -b -p

Hello, I am using ROS Kinetic on Ubuntu 16.04. I am trying to save the rosbag mgss from topics into .csv files. When I used the command below, I see duplicate messages. `rostopic echo -b xxx.bag -p...

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When does rosbag start capturing messages and why I see the delay in two...

I am trying to understand how much time it takes for rosbag to start capturing packet as soon as we type `rosbag record -a` . After analyzing packets captured in the wireshark ( see the wireshark...

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