nx_vmvpred.nx

nx_vmvpred.nx -- MOTION-VECTOR PREDICTION (the H.264/VP9 MVP): instead of coding each block's absolute motion vector, predict it from the median of the left / top / top-right neighbour MVs and code only the RESIDUAL (mv - pred). On a camera pan or head-pan -- the dominant motion in a video call -- neighbouring blocks share motion, so the residual MVs collapse to ~0 and cost almost no bits. Pure integer; the predictor the codec runs identically on encode+decode. license_tier: ORIGINAL