I am trying to get a PDF/X-1a compliant PDF for sending the pdf to Lightning Source for publishing books. I searched and found the following post and tested it PDF/A with hyperref on TeX Live 2013 ...
I got this strange warning: \pdfobjcompresslevel > 0 requires \pdfminorversion > 4. Object streams disabled now. using pdfx package. Here it is a MWE: ...