SET_EXPR          201 libavfilter/vf_hue.c     SET_EXPR(brightness, "b");
SET_EXPR          202 libavfilter/vf_hue.c     SET_EXPR(saturation, "s");
SET_EXPR          203 libavfilter/vf_hue.c     SET_EXPR(hue_deg,    "h");
SET_EXPR          204 libavfilter/vf_hue.c     SET_EXPR(hue,        "H");
SET_EXPR          408 libavfilter/vf_hue.c         SET_EXPR(hue_deg, "h");
SET_EXPR          411 libavfilter/vf_hue.c         SET_EXPR(hue, "H");
SET_EXPR          414 libavfilter/vf_hue.c         SET_EXPR(saturation, "s");
SET_EXPR          416 libavfilter/vf_hue.c         SET_EXPR(brightness, "b");