ESS_MODE           65 libavfilter/af_deesser.c     {  "e", "ess",             0,                 AV_OPT_TYPE_CONST,  {.i64=ESS_MODE}, 0, 0, A, "mode" },
ESS_MODE          198 libavfilter/af_deesser.c             case ESS_MODE: dst[i] = src[i] - sample; break;