Tracker uses the Xuggle video engine to open most digital video files including .mov, .avi and .mp4 on all platforms. Tracker online uses the HTML5 engine to open .mp4 and other web video formats.

Tracker includes its own bundled runtime Java and open-source video engine Xuggle. You can always use a separate JRE to run Tracker by choosing it in Tracker Preferences.

When played on an interlaced TV the fields are displayed sequentially so the separate images result in smoother motion, but when viewed one frame at a time in Tracker the fields are combined, resulting …

Download the Tracker software installer for Windows 64-bit from physlets.org.

void setTrailVisible (boolean visible) Shows and hides the trail. String toString () Overrides Object toString method. Methods inherited from class org.opensourcephysics.cabrillo.tracker. TTrack

The Digital Library Browser is an Open Source Physics (OSP) application that enables users to browse, organize and access collections of digital library resources such as EJS models and Tracker …

When you mark a point in Tracker's main video view, you are defining its image position. Image positions are measured in pixel units relative to the top left corner of the video image.

An offset origin is a point with user-setttable world coordinates whose image position on the screen is determined by the video coordinate system. This is the opposite of a point mass step, which has a …