public static extern int av_opt_is_set_to_default(void* obj, AVOption* o);
 public static extern int av_opt_eval_q(void* obj, AVOption* o, String val, AVRational* q_out);
 public static extern AVOption* av_opt_next(void* obj, AVOption* prev);
 public static extern int av_opt_eval_float(void* obj, AVOption* o, String val, float* float_out);
 public static extern int av_opt_eval_double(void* obj, AVOption* o, String val, double* double_out);
 public static extern int av_opt_eval_int(void* obj, AVOption* o, String val, int* int_out);
 public static extern int av_opt_eval_int64(void* obj, AVOption* o, String val, long* int64_out);
 public static extern AVOption* av_next_option(void* obj, AVOption* last);
 public static extern int av_opt_eval_flags(void* obj, AVOption* o, String val, int* flags_out);
示例#10
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 public static extern String av_get_string(void* obj, sbyte* /*String*/ name, AVOption** o_out, sbyte* /*String*/ buf, int buf_len);
示例#11
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 public static extern long av_get_int(void* obj, String name, AVOption** o_out);
示例#12
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 public static extern AVRational av_get_q(void* obj, String name, AVOption** o_out);
示例#13
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 public static extern double av_get_double(void* obj, String name, AVOption** o_out);
示例#14
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 public static extern int av_set_string3(void* obj, String name, String val, int alloc, AVOption** o_out);