XML Data Files

Tracker saves properties of the video clip, coordinate system and tracks in xml data files with the extension "trk". When a saved data file is opened, Tracker loads the specified video, sets the clip and coordinate system properties, and creates new tracks with the specified identification and step positions.

Step positions are saved in image coordinates, so they are not suitable for direct analysis. To access the world data associated with a track, use a datatable view.

1. Opening a Data File

Bring up the Open dialog with the Open button or menu item.

Set the file type to Data, select the desired file and click Open.

Tracker opens the file in a new tab that displays the file name.

2. Saving a Data File

Save changes to an open data file by clicking the Save button or File|Save menu item.

Save a new data file by choosing the File|Save As... menu item. Tracker will assign the file a "trk" extension if none is specified.

3. Importing from and Exporting to a Data File

Videos, tracks and/or the coordinate system from a data file can be imported into an existing tracker panel using the Import menu item from the File menu. Selected tracker panel elements can also be exported to a data file using the Export menu item.

When importing or exporting a data file, the available elements are displayed in a dialog that allows the user to select the ones desired.

4. Editing a data file directly

A Tracker data file is easily human-read and edited with any text editor. The xml format conforms to the doctype specification defined in osp10.dtd.