extract_field      79 libavfilter/vf_separatefields.c         extract_field(second, sf->nb_planes, second->top_field_first);
extract_field      96 libavfilter/vf_separatefields.c     extract_field(inpicref, sf->nb_planes, !inpicref->top_field_first);
extract_field     113 libavfilter/vf_separatefields.c         extract_field(sf->second, sf->nb_planes, sf->second->top_field_first);