extract_field      80 libavfilter/vf_separatefields.c         extract_field(second, s->nb_planes, second->top_field_first);
extract_field      97 libavfilter/vf_separatefields.c     extract_field(inpicref, s->nb_planes, !inpicref->top_field_first);
extract_field     113 libavfilter/vf_separatefields.c         extract_field(s->second, s->nb_planes, s->second->top_field_first);