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attribute_deprecated const AVOption *av_set_q(void *obj, const char *name, AVRational n);
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attribute_deprecated const AVOption *av_set_int(void *obj, const char *name, int64_t n);
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double av_get_double(void *obj, const char *name, const AVOption **o_out);
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AVRational av_get_q(void *obj, const char *name, const AVOption **o_out);
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int64_t av_get_int(void *obj, const char *name, const AVOption **o_out);
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attribute_deprecated const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len);
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attribute_deprecated const AVOption *av_next_option(FF_CONST_AVUTIL55 void *obj, const AVOption *last);