HORZCLOSE         174 libavfilter/vf_xfade.c     {   "horzclose",  "horz close transition",  0, AV_OPT_TYPE_CONST, {.i64=HORZCLOSE},  0, 0, FLAGS, "transition" },
HORZCLOSE        1417 libavfilter/vf_xfade.c     case HORZCLOSE:  s->transitionf = s->depth <= 8 ? horzclose8_transition  : horzclose16_transition;  break;