BLOCK_LCM          98 libavfilter/vf_signature.c     sc->divide = (((uint64_t) inlink->w/32) * (inlink->w/32 + 1) * (inlink->h/32 * inlink->h/32 + 1) > INT64_MAX / (BLOCK_LCM * 255));
BLOCK_LCM         180 libavfilter/vf_signature.c     int64_t precfactor = (sc->divide) ? 65536 : BLOCK_LCM;