MODE_DROP_EVEN 42 libavfilter/vf_tinterlace.c {"drop_even", "drop even fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_DROP_EVEN}, INT_MIN, INT_MAX, FLAGS, "mode"}, MODE_DROP_EVEN 410 libavfilter/vf_tinterlace.c case MODE_DROP_EVEN: /* only output odd frames, even frames are dropped; height unchanged, half framerate */ MODE_DROP_EVEN 411 libavfilter/vf_tinterlace.c out = av_frame_clone(tinterlace->mode == MODE_DROP_EVEN ? cur : next);