nx_vskip.nx

nx_vskip.nx -- sovereign SKIP-BLOCK coding (V-R6). When a block matches its motion prediction closely (residual SAD below threshold) AND the motion vector is the predicted/zero MV, code it as a single 1-bit "skip" flag -- no MV, no residual. A static scene -> almost every block skips -> a near-static frame costs a handful of bits instead of the ~100 B per-block-overhead floor. This is the skip-MB the live codec needs. license_tier: ORIGINAL