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ros2 zstd compression - why is file ending not aligned to library default

When compressing rosbags (ros2) with the zstandard library, why is the file ending '.zstd' instead of '.zst'? The latter seems to be the default one for the zstandard library and is therefore ...
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How To Write C++ CompressedImage Subscriber?

Folks, I can't find explicit tutorials on how to WRITE a subscriber for compressed images on roscpp. I see the one in python, as well as the image_transport tutorials, etc., but nothing concrete about ...
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video_recorder compressed image

Hi all, I am trying to get a video from a compressed Image. I saved the data from the camera in a rosbag file called _2016-09-13-02-10-12.bag. If I do : ...
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1 answer
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how to change the plugin's param in launch

Hello! I find that image_transport provides only one param (image_transport)for us to choose different compressed plugins. And ...
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1 answer
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read raw_image compressed uint8[] data

Hello everybody! I'm trying to read the datas of the "sensor_msgs/CompressedImage" message in a c++ program. Therefore I want to read the uint8[] data array. While using the callback ...
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Rosjava Theora support

Hi all, I'm quite new to ROS and we develop a vision android application for a daily-help robot and we re interested in reducing drastically the amount of bandwidth used by the image transport. So far ...
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1 answer
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Is pointcloud compressable?

I'm using the PR2 and when I'm sending the date through the network I'm having lag problems. And for example, when I receive the image of one of the cameras, there's a topic in which the information ...
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1 answer
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How to I rosbag/record a loosless compressed images

Hi I like to record raw images using rosbag. rosbag record /front_camera/image_raw Works perfect and I can view the images with ...
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1 answer
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Playback of large compressed bag with /clock

I am having a strange issue. When I try to play a compressed bag file it looks like the clock deadlocks and stops publishing to /clock. All other topics though seem to be published fine. Playing back ...
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1 answer
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subscribing to multiple compressed image streams via wifi fails

I'm trying to send kinect depth and rgb images from a laptop on a robot to a different computer via wifi. While it is possible to subscribe to 1 stream of compressed images without any problems, I'm ...
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1 answer
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Exporting compressed video

I followed the linked image and video data export tutorial: http://www.ros.org/wiki/rosbag/Tutorials/Exporting%20image%20and%20video%20data However, I only save the compressed video to the bag file. ...
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