Function ffmpeg_dev::sys::av_opt_get_key_value

pub unsafe extern "C" fn av_opt_get_key_value(
    ropts: *mut *const c_char, 
    key_val_sep: *const c_char, 
    pairs_sep: *const c_char, 
    flags: c_uint, 
    rkey: *mut *mut c_char, 
    rval: *mut *mut c_char
) -> c_int

Extract a key-value pair from the beginning of a string.

@param ropts pointer to the options string, will be updated to point to the rest of the string (one of the pairs_sep or the final NUL) @param key_val_sep a 0-terminated list of characters used to separate key from value, for example '=' @param pairs_sep a 0-terminated list of characters used to separate two pairs from each other, for example ':' or ',' @param flags flags; see the AV_OPT_FLAG_* values below @param rkey parsed key; must be freed using av_free() @param rval parsed value; must be freed using av_free()

@return >=0 for success, or a negative value corresponding to an AVERROR code in case of error; in particular: AVERROR(EINVAL) if no key is present