Creating metadata using \hypersetup

Question

I'm trying to create metadata using \hypersetup but it doesn't work. Here are the commands I use

\usepackage[a-1b]{pdfx}
\usepackage{hyperref}
\hypersetup{
    pdftoolbar=true,        % show Acrobat’s toolbar?
    pdfmenubar=true,        % show Acrobat’s menu?
    pdffitwindow=false,     % window fit to page when opened
    pdfstartview={FitH},    % fits the width of the page to the window
    pdftitle={title},    % title
    pdfauthor={Salvatore Mazzarino},     % author
    pdfsubject={Subject},   % subject of the document
    pdfcreator={Salvatore Mazzarino},   % creator of the document
    pdfproducer={Salvatore Mazzarino}, % producer of the document
    pdfkeywords={Green Networking} {Mobile Cloud} {Network Coding} {Energy}, % list of keywords
    pdfnewwindow=true,      % links in new window
    colorlinks=false,       % false: boxed links; true: colored links
    linkcolor=red,          % color of internal links (change box color with linkbordercolor)
    citecolor=green,        % color of links to bibliography
    filecolor=magenta,      % color of file links
    urlcolor=cyan           % color of external links
}

Answer 1

The documentation of pdfx is pretty clear on how metadata should be inserted, see Section 2.1:

As mentioned above, standards compliant PDF documents need XMP metadata to be included. In order to create XMP in the prescribed XML format, a simple data file holding the meta information of the document needs to be created either through a program or by hand. For our purposes, we name it as \jobname.xmpdata, a simple example of which will look like the following:

    \Keywords{pdfTeX\sep PDF/X-1a\sep PDF/A-b}
    \Title{Sample LaTeX input file}
    \Author{LaTeX project team}
    \Org{TeX Users Group}

Answer 2

When the wish is to create metadata using \hypersetup then don't use pdfx because it's approach is to use a separate .xmpdata file. This approach is incompatible with the hypersetup metadata commands.

See this answer for a minimal example that uses \hypersetup and hyperxmp.

Also pdfcreator and pdfproducer should not be set. They declare which TeX engine was used not the author of the PDF. pdfpublisher may be what you' re looking for.