Only released in EOL distros:
Package Summary
A node that provides a mjpeg server which is able to subscribe to any ros image stream.
- Author: Benjamin Pitzer
- License: BSD
- Repository: bosch-ros-pkg
- Source: svn http://svn.code.sf.net/p/bosch-ros-pkg/code/tags/stacks/remote_lab/remote_lab-0.2.2
Package Summary
A node that provides a mjpeg server which is able to subscribe to any ros image stream.
- Author: Benjamin Pitzer
- License: BSD
- Source: svn http://svn.code.sf.net/p/bosch-ros-pkg/code/branches/electric/stacks/remote_lab
Package Summary
A node that provides a mjpeg server which is able to subscribe to any ros image stream.
- Author: Maintained by Benjamin Pitzer
- License: BSD
- Source: svn http://svn.code.sf.net/p/bosch-ros-pkg/code/trunk/stacks/mjpeg_server
Package Summary
A ROS Node to Stream Image Topics Via a MJPEG Server
- Maintainer status: maintained
- Maintainer: Russell Toris <rctoris AT wpi DOT edu>
- Author: Benjamin Pitzer <benjamin.pitzer AT us.bosch DOT com>
- License: BSD
- Bug / feature tracker: https://github.com/RobotWebTools/mjpeg_server/issues
- Source: git https://github.com/RobotWebTools/mjpeg_server.git (branch: master)
Package Summary
A ROS Node to Stream Image Topics Via a MJPEG Server
- Maintainer status: end-of-life (Replaced by the web_video_server package.)
- Maintainer: Russell Toris <rctoris AT wpi DOT edu>
- Author: Benjamin Pitzer <benjamin.pitzer AT us.bosch DOT com>
- License: BSD
- Bug / feature tracker: https://github.com/RobotWebTools/mjpeg_server/issues
- Source: git https://github.com/RobotWebTools/mjpeg_server.git (branch: master)
Package Summary
A ROS Node to Stream Image Topics Via a MJPEG Server
- Maintainer status: end-of-life (Replaced by the web_video_server package.)
- Maintainer: Russell Toris <rctoris AT wpi DOT edu>
- Author: Benjamin Pitzer <benjamin.pitzer AT us.bosch DOT com>
- License: BSD
- Bug / feature tracker: https://github.com/RobotWebTools/mjpeg_server/issues
- Source: git https://github.com/RobotWebTools/mjpeg_server.git (branch: master)
Contents
This package is EOL, and has been replaced by web_video_server.
About
A natural means of interacting with and checking upon the progress of the robot is through video. MJPEGs, or motion JPEGs, are a file format in which each frame of a video stream is separately compressed as a JPEG image. The mjpeg_server is a streaming server that subscribes to requested image topics in ROS and publishes those topics as MJPEG streams via HTTP. While rosbridge is capable of streaming video, as it is just another message type from ROS, the web browser is optimized to efficiently download images in binary format. Thus for increased performance benefits this additional communication channel is used. In order to deal with a user’s specific requirements the video streams can be provided at a desired quality and size to accommodate different connection speeds and interface designs. mjpeg_server is developed as part of the Robot Web Tools effort. |
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Installation
To install the mjpeg_server package, you can choose to either install from source, or from the Ubuntu package:
Source
To install from source, execute the following:
Ubuntu Package
To install the Ubuntu package, execute the following:
sudo apt-get install ros-groovy-mjpeg-server
Running the Node
In a new terminal, run the mjpeg_server:
rosrun mjpeg_server mjpeg_server
By default the server serves streams on port 8080. If this port is already used by another process you will see an appropriate error message.
Optionally, you can set a different port on the command line when launching mjpeg_server:
rosrun mjpeg_server mjpeg_server _port:=8181
Accessing the Stream in a Web Browser
The stream can be viewed by any current browser. If the server runs on the local machine you can access the stream using the following URL:
http://localhost:8080/stream?topic=/IMAGE_TOPIC
Here, /IMAGE_TOPIC is a ROS topic generated by the image_transport module, e.g. /wide_stereo/left/image_color in case you are using a PR2.
Single image snapshots
Instead of displaying a stream of images, it is also possible to display a single image snapshot. The URL for snapshots is:
http://localhost:8080/snapshot?topic=/IMAGE_TOPIC
Display parameters
The image stream can be configured by several parameters. The parameters are added to the URL according to the URI scheme:
http://localhost:8080/stream?topic=/IMAGE_TOPIC?param1=value1?param2=value2?param3=value3
Currently the following parameters are available:
- width (integer, default: original width)
- The image stream will be resized to a new width and height. This parameter has to be used in conjunction with the height parameter.
- The image stream will be resized to a new width and height. This parameter has to be used in conjunction with the height parameter.
- The jpeg image quality (1...100). This parameter can be used to reduce the size of the resulting mjpeg stream.
- Rotates the image by 180 degrees before streaming.
The following example shows a resized version of an image stream:
Support
Please send bug reports to the GitHub Issue Tracker. Feel free to contact us at any point with questions and comments.
