[needs-packaging] videotracker

Video Tracker is an educational Java program that allows you to use a video camera (or a saved video file) to investigate the physics of real-life experiments.
Once the video is recorded and imported into Video Tracker, users can plot the trajectory of multiple objects interactively by clicking on the screen. The software calculates displacement, velocity and acceleration (linear, angular and absolute) as well as several other parameters. It also includes tools to measure line profiles of spectra, dynamic modelling and comes with a sample library of videos and experiments.
It used to be based on Java Quicktime, but the author has recently put in a lot of effort to switch it over to Xuggle, to ensure that it can run on a wide variety of operating systems, including Linux.

URL: http://www.cabrillo.edu/~dbrown/tracker/
License: GNU General Public License
Notes: Video Tracker runs from a jar file, that is also available for download from the website.
Video Tracker depends on the Xuggle Media Licence, downloadable at http://www.xuggle.com/xuggler/downloads/
However, Xuggle is only available as source code and an executable shell script.
I installed Xuggle into /usr/lib/xuggler
Once installed, environment variables need to be set in the system, as follows:

export XUGGLE_HOME=/usr/lib/xuggler
export LD_LIBRARY_PATH=$XUGGLE_HOME/lib:$LD_LIBRARY_PATH
export PATH=$XUGGLE_HOME/bin:$PATH

Then, symbolic links need to be made from the Xuggle files:
xuggle-xuggler.jar,
logback-core.jar,
logback-classic.jar and
slf4j-api.jar

into the directory /usr/lib/jvm/java-6-openjdk/jre/lib/ext

Finally, the following instructions need to be run, in order for Video Tracker to correctly locate the Xuggle files:

export LD_LIBRARY_PATH=$XUGGLE_HOME/lib:$LD_LIBRARY_PATH
java -jar /usr/lib/Tracker/tracker.jar

Maybe the first command can be included in a system configuration file somewhere?