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ROS Bag File Point Cloud

Is their a way to open a .bag file in a application such as cloud compare, or mesh lab? I am using a Kinect camera for mapping and I want to be able to view the 3d point cloud map created. Thank you...

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Is it possible to see the list of topics available in the bag file while...

I know there exist a command "rosbag info" that gives the detail of the bag file. But I want the rosbag player to print all the topics on which it will be going publish data once. Is it possible? If...

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time synchronization

I write the following launch code in order to record synchronized data from 4 topics (color image, depth image, joy command, and IMU) /use_sim_time : false I use ApproximateTime Synchronizer but it...

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rosbag message instance & ros1_bridge help

Hi, I was working with some tools for ros2 when I came across rosbag and it's message_instace class. On the same topic, I started understanding the ros1_bridge. I'd like to get more detail on how...

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record topics with time synchronizer

Hello every one I want to record 4 topics with time synchronization. I found [message_filter](http://wiki.ros.org/message_filters) in ROS documentation that talk about this as a following: import...

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Convert ROS Image to CompressedImage(png)

I am trying to convert a rosbag with raw images to another rosbag containing compressed images using cv2 bridge: def compress_to_png(msg): bridge = CvBridge() img = bridge.imgmsg_to_cv2(msg,...

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How can i read messages from a ROSbag file ?

I have a bag file in which some are custom messages whereas others are string messages. How can i display the contents of the topics which have message of type strings (without converting it to a .csv...

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How to read Binary data from a bagfile ?

I have received a bag file which i need to analyze. I opened the file in `rqt_bag` and played a topic `/pnc/carstatus` which has the messages of type `string`. Now to read the messages, I used...

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Confilct in rosbag play and publishing messages

I tried a simple use case. Used the turtlesim example : published messages from `turtle_teleop_key` to `turtlesim_node` and recorded the data in a `.bag` file. Now when i play the rosbag file using...

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rosbag : rewrite the values of a topic

Dear all, what can be the best way to rewrite the values of the messages in a topic in a bag file. For instance, how can I go about creating a new bag that contains modified values of a topic of...

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Cannot open rosbags with multiarrays.

- Distro: kinetic - OS: Ubuntu 16.04 - Program: Matlab and python Hello, I've encountered this problem in matlab R2018a (it works fine in R2017b) and in python. When trying to open a rosbag with any of...

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Issues rosbag big bags compressed with lz4

Hey everyone, our setup: 1. Ubuntu 16.04.03 LTS 2. ROS Kinectic 3. RealSense R200 We try to record longterm bag-files (about an hour) of realsense_camera r200_nodelet_rgbd.launch. We saved therefore...

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Subscribing to compressed Images from rosbag

Hello, I have a rosbag file with compressed images recorded. The rosbag file is publishing the topic: "/xxxx/image_raw/compressed" of type "sensor_msgs/CompressedImage". I want to write the subscriber...

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ROSBAG with points cloud

Hello everyone, I have a rosbag file contain images and measurement point list. I have already extracted images. There is a topic of type `datatypes/scan_point_list_2202` And I have no idea from where...

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Couldn't find an AF_INET address of []

I have written a ROS node to subscribe to the topics from a rosbag `/sensors/velodyne_points /sensors/camera/image_color /sensors/camera/camera_info` The `main()` function is as below int main(int...

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Split ROSbag to two

Hi All, I am using rosindigo on two computers. I am using a ROS bag which includes sensor data from a robot (it's the Cartographer Deutsches museum 2D dataset) used to build a map. I would like to...

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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 overriding Extracted Images

Hello, I have a rosbag file which contain images. I am extracting images through the following subscriber. I extract only one image. I thing it is replacing every new image with the old one. I need to...

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rosbag image timestamp

I have a rosbag file which contain images and sensor data. I need to extract Images and their timestamp. And afterwards I want to use them to train Neural Network for classification purpose. For this,...

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rosbag play folder with bags using roslauch

Hello, how can I use `rosbag play` in a `roslauch` file, in order to play a folder that contains all bags. Folder should be and argument to `roslauch`, e.g: > roslaunch play_data.launch >...

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