ff_nut_free_sp    137 libavformat/nut.h void ff_nut_free_sp(NUTContext *nut);
ff_nut_free_sp   1211 libavformat/nutdec.c     ff_nut_free_sp(nut);
ff_nut_free_sp   1188 libavformat/nutenc.c     ff_nut_free_sp(nut);