VAR_SAMPLE_RATE    58 libavfilter/af_afftfilt.c enum                                   { VAR_SAMPLE_RATE, VAR_BIN, VAR_NBBINS, VAR_CHANNEL, VAR_CHANNELS, VAR_PTS, VAR_REAL, VAR_IMAG, VAR_VARS_NB };
VAR_SAMPLE_RATE    52 libavfilter/af_volume.h     VAR_SAMPLE_RATE,
VAR_SAMPLE_RATE   128 libavfilter/f_select.c     VAR_SAMPLE_RATE,
VAR_SAMPLE_RATE    77 libavfilter/setpts.c     VAR_SAMPLE_RATE,