1. A method for processing a video stream of digital images, the method comprising the steps of: receiving the video stream which comprises at least one composite frame (FC) containing a pair of stereoscopic digital images (L,R) according to a predetermined packing format; receiving metadata which describes the format of the composite frame (FC); generating an output video stream which can be reproduced on a visualization apparatus ( 222 ), characterized in that the method comprises the steps of: determining the area in the composite frame (FC) which is occupied by one image of the stereoscopic pair within the composite frame based on said metadata; extracting the image contained in said area from the composite frame (FC), and generating an output frame containing said extracted image.