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Is it possible to extract gray scale images using image_view?

I have ros messages which contains imaged data of type 16UC1. But image_view seems to extract image of type RGB8 only. Is it possible to make it convert 8UC1 and 16UC1 types?

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Extract time from .bag file

Hi, I am trying to process some bag files and, while I am able to get the timestamp for each message, I am not able to get the actual time the message was received. Is it possible to get it? I am using...

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nodes not working in launch file

Hello guys, I have the problem that some nodes are not working from launch file. Specifically the tf static_transform_publisher and also the rosbag record. I do not get any error but they are not...

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ROS bag metal detector

i am having trouble extracting information from metal_detector_msg/coil from rosbag file.Can any one provide some information regarding the same.My python scripts works good for imudata msg,camera msg...

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rosbag play tf issues

I have a very peculiar issue here. When playing the well known bagfile rgbd_dataset_freiburg1_xyz.bag and have rviz open, the clock gets stuck around 3.780429. If i play back with 10% speed, everything...

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rosbag bag_player issue

Hello everyone, i am trying to play a bagfile in c++ code using the "bag_player" class, but cannot find a way to satisfy the second argument of the "register_callback" method. The code in question...

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How to use service calls to toggle rosbag?

Dear all, I would like to toggle rosbag with a service call. I want to do this because I put a mini computer on a quadrotor, and I need to rosbag all the messages when I turn on a switch. Best, Ziyang

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What does "cannot migration from subtype [] to []" mean when generating...

I'm generating new migration rules for bag files that will be appended to existing migration rules. When generating the new rules I get messages like this: WARNING: Within rule [some_rule] cannot...

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Playback of rosbag file at the same rate that messages are stored in rospy

Hi, I am trying to playback data that I have stored using rosbag in rospy. Is it possible to playback the rosbag file in rospy at the same rate that it is recorded? I know that I can do this from the...

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when I use the code copy from rosbag tutorials,there some wrong?

when I use the code copy from the tutorial(http://wiki.ros.org/rosbag/Code%20API),but there are some wrong like this:error: expected primary-expression before ‘const’ foreach(rosbag::MessageInstance...

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Problem for leg_detector in People package when using rosbag play

I have collected /tf and /scan data from a Turtlebot2( i.e. Kobuki robot) by using rosbag record. I also have written a new tracker and want to test it with the recorded data beforehand. The new...

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rosbag doesn't display map in real-time on rviz

I am following the gmapping tutorial, and it says: If you don't care to wait until the log playback and mapping process has finished before seeing some results, then you can watch the progress in rviz....

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Issue trying to modify bag contents with python

So I've found out that I need a frame_id in my imu message to be able to visualize it in RViz, so I've been trying to add a frame_id to the bags I have. When I try reading through the messages in the...

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Why doesn't the rosbag api support splitted bags files?

Hi, I am writing a piece of code which uses the rosbag python API to parse a bag file. It crawls a directory and processes all found bags (searches for *.bag). Basically it looks like this for filename...

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ROS offline bag view with message_filter synchronizer callbacks

I have a stereo camera node that takes in images and camera infos set up with an approximate sync policy: typedef message_filters::sync_policies::ApproximateTime ApproximatePolicy; typedef...

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Cannot include rosbag as catkin dependency

I am having trouble including rosbag as a catkin dependency for my package (to use the C++ API). I have added it as both a build and run dependency in package.xml; i.e.,rosbagrosbag And it is included...

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Error playing bagfile ~4GB on 32bit system

Hello, I have no problem with the info comand, but when I am trying to play a bagfile but i am gettint an error. [FATAL] [1425331406.887155495]: Error opening file: 2015-02-13-10-04-56.bag Bagfile...

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Broken laser_assembler bag link. Need tilt_scan bag file

Hi, The sample bag file in the tutorial page of [laser_assembler](http://wiki.ros.org/laser_assembler/Tutorials/HowToAssembleLaserScans) package is broken or removed. Can anyone provide a link to the...

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Transform not working with rosbag

I have followed the tutorial to create a tf broadcaster. Here is the code: void poseCallback(const sensor_msgs::PointCloud2::ConstPtr& msg){ static tf::TransformBroadcaster br; tf::Transform...

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bag migration, fill new field with incrementing counter

Is it possible to fill a new message field in an old bag data with an incrementing counter using a bag migration rules file (http://wiki.ros.org/rosbag/migration) and rosbag fix?

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