Only released in EOL distros:

See mjpeg_server on index.ros.org for more info including anything ROS 2 related.

Package Links

Dependencies (6)

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 Links

Dependencies (6)
Used by (1)

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

mjpeg_server

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 Links

Dependencies (6)
Used by (2)

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 Links

Dependencies (6)
Used by (5)

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 Links

Dependencies (6)
Used by (3)

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

About
Installation
1. Source
2. Ubuntu Package
Running the Node
Support

This package is EOL, and has been replaced by web_video_server.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.

MJPEG Stream

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:

```
   1 cd /path/to/your/catkin/workspace/src
   2 git clone https://github.com/RobotWebTools/mjpeg_server.git -b groovy-devel
   3 cd ../
   4 catkin_make install
```

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.
height (integer, default: original height)
- The image stream will be resized to a new width and height. This parameter has to be used in conjunction with the height parameter.
quality (integer, default: 90)
- The jpeg image quality (1...100). This parameter can be used to reduce the size of the resulting mjpeg stream.
invert (none, default: )
- 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.

robot-web-tools@googlegroups.com