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...
View ArticleIs 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...
View Articletime 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...
View Articlerosbag 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...
View Articlerecord 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...
View ArticleConvert 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,...
View ArticleHow 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...
View ArticleHow 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...
View ArticleConfilct 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...
View Articlerosbag : 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...
View ArticleCannot 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...
View ArticleIssues 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...
View ArticleSubscribing 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...
View ArticleROSBAG 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...
View ArticleCouldn'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...
View ArticleSplit 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...
View ArticleHow 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...
View ArticleROSBAG 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...
View Articlerosbag 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,...
View Articlerosbag 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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