Print arguments following specified format into a large enough auto
allocated buffer. It is similar to GNU asprintf().
@param fmt printf-compatible format string, specifying how the
following parameters are used.
@return the allocated string
@note You have to free the string yourself with av_free().
Print arguments following specified format into a large enough auto allocated buffer. It is similar to GNU asprintf(). @param fmt printf-compatible format string, specifying how the following parameters are used. @return the allocated string @note You have to free the string yourself with av_free().