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Filter out messages from a ros bag

Hi, I'd like to filter out some "bad messages" from my rosbags. I'm using the C++ rosbag API. Should I open the bagfile in read mode and republish the good messages and record them in another bag using...

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Rosbag record dropping and corrupting data

Hello, I'm trying to store selected topics being published from various sensors sources (velodyne, monocular camera, IMUs) in a large bag file. I'm able to record the bagfile without seeing any errors....

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add metadata to rosbag

Hello everybody, I am trying to add ros parameters to a bag file just after the record is done. I am writing a python script to do that and I have followed this link :...

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can't save point cloud in bag file complitly

Hy, i am trying to save the point cloud with size(480,640) in bag file by their coordinate values and then read them in another node so that machine determines which part of the point cloud has been...

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Iterating through bagfile messages yields nullpointer

Hi, I wrote the following class that iterates through the messages of a bagfile: BagReader.h: class BagReader { public: BagReader(std::string const &filename); ~BagReader(); void...

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Extract robot position from rosbag

I recorded tf-messages (while driving the robot) into a bagfile and wrote a ros node that should extract the positions (base_link-frame) from that bag file. My idea was to use a tf::Transformer and...

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Create Map from Rosbag

Hi I am having problem with creating map(.pgm and .yaml) files. First i tried to create a map using the existing bag file following...

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Problem with creating map with Robotino and without laser scan

I am using robotino and have no Laser Scanner. I am not having any topic publishing named /base_scan. But I want to user slam_gmapping to scan and create map from the bag file. i used the code below:...

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rosbag play cannot return back?

Hello, I use `rosbag play -s 10 -u 10 a.bag` to publish the recorded messages. But I find that when I use the command before, I cannot use `rosbag play -s 1 -u 1 a.bag` to get the right result, which...

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Convert a Video to a Rosbag

Hi, I have recorded a Video with 60 FPS on a Smartphone. I now want to use this in ROS. Therefore I like to convert that into a Rosbag. (If you have a other idea I'm open to it) But I didn't find any...

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rawlog_mrpt_to_bagfile

Hi all, I need 2d laser data of horizontal terrain, but I am unable in getting that, so I am using data from (mrpt.org), rawlog format but can any please tell me how to convert the rawlog file in to...

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amcl does not publish transforms to "future"

I am using rosbag to playback a bag file with messages from `/tf`, `/scan`, and `/initialpose`. I am trying to use `amcl` to localize the robot within that bag. I have set `use_sim_time` to be true....

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tf::TransformListener gets wrong tf

Hello, TL;DR tf::TransformListener gets a different transform than shown in RVIZ I am having quite a strange problem. I am using a rosbag file to playback recorded data and I am adding new transforms...

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Rosbag and simulated time

Hello all, I am trying to run a bag file if simulated time but I am not succeeding on it. Here is what happens: After I run the bag file with the command rosbag play --clock -l laser_scanner3.bag I am...

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How to Detect Subscriber Drops a Message

I made a subscriber which reads LIDAR data from rosbag-play. I use C++(roscpp). But when I do rosbag-play with normal speed, subscriber's callback function cannot catch up with LIDAR stream speed, then...

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Play ordered multiple bags from a launch file

Hi, I have a question that might be a bit silly, but i do not really find a answer that satisfy me. I have recorded a sequence of 15 minutes splitted in 1 minute rosbag. I want to reproduce them 1 by...

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Rosbag in Roslaunch, save rosbag to specific directory

Hey I wanted to use robsbag record in a roslaunch file like: How do I specify that I want to save the bag with a timestamp and to a specific location? I am running on an embedded hardware and have...

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how to use rosbag to test costmap/navigation

I modified a costmap in navigation, and I want to use recorded data to test it. So, I use rosbag record -a -x "(/primesense(.*))?(/move_base(.*))?" -O test.bag to record all data except pointcloud and...

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Store ROS messages in file ?

Hello I am working on Some project, I have to store ROS messages in some File using C++ API's. I knew ROS BAG files which is excellent for storing ROS messages But i want to knew Is their any other...

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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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