MODE_MERGE         41 libavfilter/vf_tinterlace.c     {"mode",              "select interlace mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_MERGE}, 0, MODE_NB-1, FLAGS, "mode"},
MODE_MERGE         42 libavfilter/vf_tinterlace.c     {"merge",             "merge fields",                                 0, AV_OPT_TYPE_CONST, {.i64=MODE_MERGE},             INT_MIN, INT_MAX, FLAGS, "mode"},
MODE_MERGE        120 libavfilter/vf_tinterlace.c     outlink->h = tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD ?
MODE_MERGE        258 libavfilter/vf_tinterlace.c     case MODE_MERGE: /* move the odd frame into the upper field of the new image, even into