Hi Gyan The reference is bs2b's header file available here: https://sourceforge.net/p/bs2b/code/HEAD/tree/trunk/libbs2b/src/bs2b.h
Between line 102-112, particularly these two APIs: /* Sets a new coefficients by new cut frecuency value (Hz). */ void bs2b_set_level_fcut( t_bs2bdp bs2bdp, int fcut ); and /* Sets a new coefficients by new crossfeeding level value (dB * 10). */ void bs2b_set_level_feed( t_bs2bdp bs2bdp, int feed ); which correspond to the following two parameters in ffmpeg: - "fcut", "Set cut frequency (in Hz)", - "feed", "Set feed level (in db * 10)", Yue _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".