NB_CS              77 libavfilter/vf_ciescope.c     { "system",     "set color system", OFFSET(color_system), AV_OPT_TYPE_INT, {.i64=Rec709system}, 0, NB_CS-1, FLAGS, "system" },
NB_CS            1310 libavfilter/vf_ciescope.c     for (i = 0; i < NB_CS; i++) {