1. A method, comprising: receiving digital video data including motions vectors associated with the digital video data; comparing at least a forward motion vector of the motion vectors to at least a corresponding backward motion vector of the motion vectors; detecting, based on the comparison, a level of agreement between the forward motion vector and the corresponding backward motion vector corresponding to object motion between a first video frame and a temporally adjacent second video frame; and generating an agreement value corresponding to the detected level of agreement.