VAR_S2R_MAIN_H    192 libavfilter/vf_scale.c          vars_w[VAR_S2R_MAIN_H]    || vars_h[VAR_S2R_MAIN_H]    ||
VAR_S2R_MAIN_H    441 libavfilter/vf_scale.c         scale->var_values[VAR_S2R_MAIN_H] = main_link->h;