VAR_NB_SAMPLES    297 libavfilter/af_volume.c     vol->var_values[VAR_NB_SAMPLES] =
VAR_NB_SAMPLES    174 libavfilter/setpts.c         setpts->var_values[VAR_NB_SAMPLES] = frame->nb_samples;
VAR_NB_SAMPLES    193 libavfilter/setpts.c                 (int64_t)setpts->var_values[VAR_NB_SAMPLES],