POWER_MEAN         86 libavfilter/vf_deflicker.c         { "pm",      "power mean",      0, AV_OPT_TYPE_CONST, {.i64=POWER_MEAN},       0, 0, FLAGS, "mode" },
POWER_MEAN        354 libavfilter/vf_deflicker.c     case POWER_MEAN:      s->get_factor = get_pm_factor;     break;