-const AVOption *av_find_opt(void *obj, const char *name, const char *unit, int mask, int flags);
-const AVOption *av_set_string(void *obj, const char *name, const char *val);
-const AVOption *av_set_double(void *obj, const char *name, double n);
-const AVOption *av_set_q(void *obj, const char *name, AVRational n);
-const AVOption *av_set_int(void *obj, const char *name, int64_t n);
-double av_get_double(void *obj, const char *name, const AVOption **o_out);
-AVRational av_get_q(void *obj, const char *name, const AVOption **o_out);
-int64_t av_get_int(void *obj, const char *name, const AVOption **o_out);
-const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len);
-const AVOption *av_next_option(void *obj, const AVOption *last);
-int av_opt_show(void *obj, void *av_log_obj);
-void av_opt_set_defaults(void *s);
-void av_opt_set_defaults2(void *s, int mask, int flags);