VAR_S2R_MAIN_POS  201 libavfilter/vf_scale.c          vars_w[VAR_S2R_MAIN_POS]  || vars_h[VAR_S2R_MAIN_POS]) ) {
VAR_S2R_MAIN_POS  212 libavfilter/vf_scale.c          vars_w[VAR_S2R_MAIN_POS] || vars_h[VAR_S2R_MAIN_POS]) ) {
VAR_S2R_MAIN_POS  706 libavfilter/vf_scale.c             scale->var_values[VAR_S2R_MAIN_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos;