Add tf to existing bag file
I have created a ros node that does a tf transformation. I want to merge this new frame to an already existing bag file. I did this with rosbag record -a. (Played the existing bag and my ros node doing...
View ArticleHow can I throttle multiple ROS nodes at once?
I currently have a three-camera setup that I want to record data from using `rosbag`. However, I want to slow down the video feed from these cameras (from default 30fps to 3fps). I found out that you...
View Articlegmapping issues with laser pose
I'm working on creating a server map using the tutorial: http://wiki.ros.org/slam_gmapping/Tutorials/MappingFromLoggedData The odometry data is being published, and I have a hokuyo utm-30lx laser...
View ArticlePlotting rosbag topics in a single plot
I have a (large) rosbag. I want to plot a few of these topics (in the same plot). I don't need any playback feature. I can load the bag with rqt and plot topics, one topic per plot. But can I have more...
View ArticleSimulating real camera data
Hi guys, Is there a way I can simulate camera data similarly to how rosbag works? I tried rosbag but was missing tf data so that didn't work. is it as simple as adding another topic to record? looking...
View ArticleFinding Bufferd frames in tf2_ros::Buffer (c++)
I am creating a post-processing utility where I read all the transforms from a .bag file into a tf2_ros::Buffer. I would like to be able to ask the Buffer for all the frames it has cached. I don't see...
View ArticleTf_echo missing timestamp
Hi, I start to play my rosbag and **then** I start tf_echo : rosrun tf tf_echo odom map This is the output : > At time 1559381315.708> - Translation: [0.000, 0.000, 0.000]> - Rotation: in...
View ArticleHow to read a point cloud (.pcd) file and send it to a rosbag
Hello, I just started using the Point Cloud Library. I followed some initial tutorial [here](http://pointclouds.org/documentation/tutorials/reading_pcd.php) on how to use it. I am trying to send a...
View ArticleTried to insert a message with time less than ros::TIME_MIN Aborted (core...
Hello, after successfully reading `.pcd` file from a file as asked on my [previous...
View Articlerosbag and parameters dump with unique timestamp in filename
Dear all, my problem is the following: I want to save a rosbag file and dump at the same time the content of the parameter server on a file. I want the file and the rosbag to have exactly the same time...
View ArticleRosbags record parameter server data?
I am working with some rosbags, `rosbag info` shows that there are some `dynamically reconfigurable` parameters which i want to configure but these `parameters` are not shown when i use `rosparam...
View ArticleHow to sync images captured with different frequecies through timestamps
Hi, I recently recorded some images with a RGB camera (operating with at 20 Hz) and a Lider (10 Hz). Now I would like to align those two images. However, they are not synchronized due to the different...
View ArticleWhen an intended exit occurs, rosbag status problem.
Hi, all I am using rosbag to record some data automatically with systemd service in ubuntu. When an intended exit occurs, the rosbag file is not completed status as *.bag.active. I tried the bellow...
View ArticlePossible to record a specific time window (from T1 to T2) of a rosbag?
Hello, I am trying to understand if it is possible to record only a specific time window (from Time T1 to time T2) in a `rosbag`. The reason for this is that I need to print the result of specific...
View ArticleSlow Rosbag Image Extraction.
I am having issues extracting images from the bag files with the Python API, the extraction process is very slow. An example would be extracting frames from a bag containing video messages, the...
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