PARITY_BFF         89 libavfilter/vf_mcdeint.c     { "parity", "set the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=PARITY_BFF}, -1, 1, FLAGS, "parity" },
PARITY_BFF         91 libavfilter/vf_mcdeint.c     CONST("bff", "assume bottom field first", PARITY_BFF, "parity"),