Tracker added to #OSX FreeSMUG directory

News ยป Tracker added to #OSX FreeSMUG directory

Posted on 02 Dec 2015 18:47

Video analysis and modeling tool to be used in physics education, added to Video directory.

Tracker video modeling is a powerful new way to combine videos with computer modeling.


Tracker Features


  • Manual and automated object tracking with position, velocity and acceleration overlays and data.
  • Center of mass tracks.
  • Interactive graphical vectors and vector sums.
  • RGB line profiles at any angle, time-dependent RGB regions.


  • Model Builder creates kinematic and dynamic models of point mass particles and two-body systems.
  • Model overlays are automatically synchronized and scaled to the video for direct visual comparison with the real world.
  • New Data Tracks use data from external models including EjsS simulations.


  • Free Xuggle video engine plays and records most formats (mov/avi/flv/mp4/wmv etc) on Windows/OSX/Linux.
  • QuickTime video engine also supported on Windows and OSX.
  • Video filters, including brightness/contrast, ghost trails, and deinterlace filters.
  • Perspective filter corrects distortion when objects are photographed at an angle rather than straight-on.
  • Radial distortion filter corrects distortion associated with fisheye lenses.
  • Export Video wizard enables editing and transcoding videos, with or without overlay graphics, using Tracker itself.
  • Video Properties dialog shows video dimensions, path, frame rate, frame count, more.

Data generation and analysis:

  • Fixed or time-varying coordinate system scale, origin and tilt.
  • Multiple calibration options: tape, stick, calibration points and/or offset origin.
  • Switch easily to center of mass and other reference frames.
  • Protractors and tape measures provide easy distance and angle measurements.
  • Circle fitter tool fits circles to 3 or more points.
  • Define custom variables for plotting and analysis.
  • Add editable text columns for comments or manually entered data.
  • Data analysis tool includes powerful automatic and manual curve fitting.
  • Export formatted or raw data to a delimited text file or the clipboard.

Digital Library resources:

  • OSP Digital Library Browser provides easy access to online collections of videos and Tracker resources.
  • Use the DL Browser to find resources by name, author, keywords or other metadata.
  • Use the DL Browser to create, edit and share your own video and resource libraries.
  • Use Tracker to export self-documenting ZIP resources ideal for the DL Browser.


  • Full undo/redo with multiple steps.
  • Page view displays html instructions or student notes.
  • User preferences: GUI configuration, video engine, default language, font size, more.


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