Kinovea is an open-source motion analysis application originally developed for sports coaching and biomechanics research. It allows investigators to analyse video footage at the frame level, track objects and points across frames, measure distances and angles, and compare multiple video streams side by side. In paranormal investigation, it is used for analysis of alleged physical phenomena — objects apparently moving, doors opening, figures appearing in footage.
The key capability Kinovea brings is objective measurement: if an investigator claims they saw an object move in footage, Kinovea can track that object frame-by-frame and produce a displacement graph — showing exactly how many pixels the object moved per frame, when it moved, and the trajectory. This converts a subjective observation ('I think that moved') into an objective measurement ('the object moved 14 pixels between frames 847 and 851, equivalent to 3cm at the measured camera-subject distance').
Kinovea also supports slow-motion playback to any speed, dual video display (compare two camera angles of the same event simultaneously), and timestamped annotation export. Investigators can draw measurement references in the frame (calibration lines against known objects) to calculate real-world dimensions from pixel measurements. For footage of alleged physical phenomena, Kinovea provides the analytical toolset needed to distinguish genuine anomalous movement from vibration, camera movement, or investigator interference.