OPT_DUR            76 libavfilter/asrc_sine.c     OPT_DUR("duration",          duration,               0, 0, INT64_MAX, "set the audio duration",),
OPT_DUR            77 libavfilter/asrc_sine.c     OPT_DUR("d",                 duration,               0, 0, INT64_MAX, "set the audio duration",),