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Difference between revisions of "ECE497 Project Remote Web Cam Viewer"

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(User Instructions)
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== User Instructions ==
== User Instructions ==
First Download the git Repository:
xm$: '''mkdir WebcamFeed'''
xm$: '''git clone WebcamFeed'''
xm$: '''cd WebcamFeed'''
Install Node.js
xm$: '''opkg update'''
xm$: '''opkg install nodejs'''

Revision as of 02:12, 14 November 2012

thumb‎ Embedded Linux Class by Mark A. Yoder

Team members: Alexander W. Drane, John Lobdel

Grading Template

I'm using the following template to grade. Each slot is 10 points. 0 = Missing, 5=OK, 10=Wow!

00 Executive Summary
00 Installation Instructions 
00 User Instructions
00 Highlights
00 Theory of Operation
00 Work Breakdown
00 Future Work
00 Conclusions
00 Demo
00 Late
Comments: I'm looking forward to seeing this.

Score:  10/100

(Inline Comment)

Executive Summary

The goal of this project is to create a simple webcam based security system that allows a user to remotely view the devices web cam by navigating to a webpage. Then using buttons the user can change what camera they are viewing.

//Give two sentences telling what works. Currently we have the ability to select a camera and view the stream in a remote webpage. This view uses the VLC Plugin.

Give two sentences telling what isn't working. Currently we do not have the system switching between camera's via user inputs. We have not tested with multiple cameras.

End with a two sentence conclusion. Investigation of how to accomplish this task took up the bulk of our time and effort due to the infancy of HTML5 Related standards( and MediaStream). We decided to utilize the vlc plugin when solving the problem with HTML5 proved unfeasible at its current level of development.

Installation Instructions

Give step by step instructions on how to install your project on the SPEd2 image.

  • Include your github path as a link like this:
  • Include any additional packages installed via opkg.
  • Include kernel mods.
  • If there is extra hardware needed, include links to where it can be obtained.

User Instructions

First Download the git Repository: xm$: mkdir WebcamFeed xm$: git clone WebcamFeed xm$: cd WebcamFeed

Install Node.js xm$: opkg update xm$: opkg install nodejs

Preliminary: host$: node core.js


Here is where you brag about what your project can do.

Include a YouTube demo.

Theory of Operation

Give a high level overview of the structure of your software. Are you using GStreamer? Show a diagram of the pipeline. Are you running multiple tasks? Show what they do and how they interact.

Work Breakdown

List the major tasks in your project and who did what.

Also list here what doesn't work yet and when you think it will be finished and who is finishing it.

  • Research- Research took up the bulk of our time and effort on this project due to the obscure nature of video streaming on the web using HTML5 and related tools. Most sources online advise you to use a plugin or third party software and treat the idea of using Javascript of HTML5 for this task as a taboo subject.
    • GStreamer Implementation- John Lobdel investigated using GStreamer to acomplish this project. This implementation in the end proved effective and the easiest to implement.
    • HTML5/JavaScript Implementation - Alex Drane investigated using a pure HTML5 implementation in order to not require anything to be done by the user to view the video streams. From initial research this appeared to be something that could be done quite easily. After considerable research wading through the draft standards that have been developed I found very little sample code or examples that pertained to remote video viewing. The easiest implementation I found was using it to create a 1-to-1 chat application. This is not suitable for our needs.
  • Program Creation- John Lobdel used his research to get gstreamer to stream a video or camera input onto port 8081 that could then be read by the VLC Media Player on a remote computer. The further integration of this into a program was done with the introduction of the VLC-plugin in an html document. The final program was jointly compiled by both John and Alex.

The program creation went quite fast after a working method was discovered by John. Then it was a matter of putting the pieces together. The program consists of a node.js client server using the example provided in the examples/node.js folder, which provides the HTML server and controls for which video to stream. We embedded the vlc viewer into the page and pointed it to the location where the video would be streamed by an external function call in the .js file. This allows for a simplified approach to running the needed utilities without having to port code into the java script language.

Future Work

Adding video capture would add true security camera capabilities to this system. In addition adding motion detection into the video selection stream would be interesting. Though this might be too much for the XM's hardware.

Having a webpage that displayed all of the video feeds at once would also be an interesting feature but this could over tax the XM's hardware or internet connection.

Figuring out how to implement this project with only HTML5 and make it so that no plugin is required by the end user was Alex's original plan but the maturity of the knowledge base for HTML5 is not adequate to accomplish this task at this time. But in the future when many of the draft standards are finished this project could be implemented without the vlc-plugin.


This project was quite surprising by how difficult it is to do using the new HTML5 standards. Through the research we learned that there were currently no simple implementations of what we wished to do with this project. We had originally assumed that something as common as video streaming would have a direct implementation in the new standard but in fact it is far more restricted then we expected. By splitting each of our focuses during the research stage we were able to research the use of the bleeding edge of development and the use of the common implementation and then whoever found an implementation that worked first would allow the project to progress. In addition our parallel research gave us greater insight into the potential ways of accomplishing this task then if we had both focused on the HTML5 implementation and did not allow the project to reach a dead end as it would have if we had both focused on the HTML5 method.

In the end we did settle on using the vlc-plugin to capture the outgoing stream that John setup using gstreamer. This worked exactly as we wished it to without all of the syntax fighting that took place when trying to port the HTML5 sample code into code we had the codex's for(i.e. websocket to syntax Note: websocket wanted a Microsoft related XML file which after searching for could not be found when we tried to just use websocket).

Many of the ideas listed in Future Work would be amazing addon's to the project that would greatly expand and enhance this projects implementation.

thumb‎ Embedded Linux Class by Mark A. Yoder