RECTCROP          160 libavfilter/vf_xfade.c     {   "rectcrop",   "rect crop transition",   0, AV_OPT_TYPE_CONST, {.i64=RECTCROP},   0, 0, FLAGS, "transition" },
RECTCROP         1403 libavfilter/vf_xfade.c     case RECTCROP:   s->transitionf = s->depth <= 8 ? rectcrop8_transition   : rectcrop16_transition;   break;