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written by Douglas Brown
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The Tracker Video Analysis and Modeling Tool allows students to model and analyze the motion of objects in videos. By overlaying simple dynamical models directly onto videos, students may see how well a model matches the real world. Interference patterns and spectra can also be analyzed with Tracker.

Tracker 4.94 installers are available on Linux, Mac OS X, and Windows and include the Xuggle open source video engine.
Tracker is an Open Source Physics tool built on the OSP code library. Additional Tracker resources, demonstration experiments, and videos, can be found by searching ComPADRE for "Tracker."

Additional Tracker resources including Tracker help and sample videos are available from the Tracker home page at Cabrillo College below.

Please note that this resource requires at least version 1.6 of Java (JRE).
Subjects Levels Resource Types
Education Practices
- Curriculum Development
= Laboratory
- Instructional Material Design
- Technology
= Computers
= Multimedia
General Physics
- General
- Measurement/Units
- Lower Undergraduate
- High School
- Upper Undergraduate
- Instructional Material
= Activity
= Interactive Simulation
= Laboratory
= Model
- Tool
= Software
- Audio/Visual
= Movie/Animation
Intended Users Formats Ratings
- Educators
- Learners
- application/java
  • Currently 4.7/5

Rated 4.7 stars by 11 people

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Access Rights:
Free access
This material is released under a GNU General Public License Version 3 license.
Rights Holder:
Douglas Brown
force, interference, kinematics, mechanics, modeling, motion, oscillation, osp, spectra, spectroscopy, video analysis
Record Creator:
Metadata instance created June 4, 2008 by Anne Cox
Record Updated:
September 21, 2016 by Douglas Brown
Last Update
when Cataloged:
August 2, 2016
Other Collections:

How acceleration is calculated by tracker

Author: Eran Grinvald
Posted: October 27, 2014 at 5:33AM
Source: The Open Source Physics collection

I'm a physics teacher in highschool Israel and a part time researcher in the Weizmann Institure of Science. I'm new to tracker and think it is a fantastic tool and very excited about it.

I have two students which are frustrated that they can't reproduce the estimated acceleration calculated in tracker from the raw data (x,y,t) themselves, while they reproduce perfectly the velocities. I tried several algorithims I could think of to calculate the acceleration, all give quite different results, which means that for the specific object we tracked the time interval of the video is not short enough for numerical convergence. Yet non of the algorithims I tried did not reproduce the tracker result.

I could not find anywhere how tracker calculates the x (y) acceleration at a specific time, this without looking at the code itself.

Can anybody tell me what is the formula to calculate the acelleration in the x direction of point N (The first point that tracker calculates for is N=3, as a function of the data set x(i) and t(i) I think the standard algorithim for numerical second order integration can calculate for N=2 as well.)

Thanks in advance,


» reply

tracker not really accurate

Author: andrew rowney
Posted: January 24, 2014 at 6:18AM
Source: The Open Source Physics collection

Hi Guys.. i am tearing my hair out to get a motion analysis program which can give 9.8 m/s2 for a falling ball????? tracker gives about double that value ..can anyone help

» reply

Tracker Discussion Forum

Author: Wolfgang
Posted: December 10, 2013 at 11:01AM
Source: The Open Source Physics collection

Please post questions about Tracker and Java on the appropriate discussion forum.

» reply

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ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
D. Brown, Computer Program TRACKER VIDEO ANALYSIS AND MODELING TOOL, Version 4.94 (2009), WWW Document, (
D. Brown, Computer Program TRACKER VIDEO ANALYSIS AND MODELING TOOL, Version 4.94 (2009), <>.
APA Format
Brown, D. (2009). Tracker Video Analysis and Modeling Tool (Version 4.94) [Computer software]. Retrieved January 20, 2017, from
Chicago Format
Brown, Douglas. "Tracker Video Analysis and Modeling Tool." Version 4.94. (accessed 20 January 2017).
MLA Format
Brown, Douglas. Tracker Video Analysis and Modeling Tool. Vers. 4.94. Computer software. 2009. Java (JRE) 1.6. 20 Jan. 2017 <>.
BibTeX Export Format
@misc{ Author = "Douglas Brown", Title = {Tracker Video Analysis and Modeling Tool}, Month = {August}, Year = {2016} }
Refer Export Format

%A Douglas Brown
%T Tracker Video Analysis and Modeling Tool
%D August 2, 2016
%O 4.94
%O application/java

EndNote Export Format

%0 Computer Program
%A Brown, Douglas
%D August 2, 2016
%T Tracker Video Analysis and Modeling Tool
%7 4.94
%8 August 2, 2016

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The AIP Style presented is based on information from the AIP Style Manual.

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Tracker Video Analysis and Modeling Tool:

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Is the Basis For Tracker Eclipse Workspace
Is Required By Measuring g by Flow Rate
Is Required By Newton's Rings

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