Reference motion analysis systems require a dedicated, specific laboratory environment, with self-reflective markers placed on anatomical points by trained personnel, limiting gait analysis to specific pathologies. Some markerless systems have emerged but still require numerous cameras and are expensive. The implementation of a markerless motion capture system based on only four cameras in routine clinical practice would broaden the indications for gait analysis to include any pathology of the lower limbs and/or spine in the pediatric population.