VAR_S2R_MAIN_DAR  195 libavfilter/vf_scale.c          vars_w[VAR_S2R_MAIN_DAR]  || vars_h[VAR_S2R_MAIN_DAR]  ||
VAR_S2R_MAIN_DAR  445 libavfilter/vf_scale.c         scale->var_values[VAR_S2R_MAIN_DAR] = scale->var_values[VAR_S2R_MDAR] =