Feature request: PDF/A-1 (Iso 19005), Currently only output in PDF/A-3B

[christianclavet]

Prerequisites

• I have written a descriptive issue title
• I have verified that I am using the latest version of ImageMagick
• I have searched open and closed issues to ensure it has not already been reported

Description

Currently we can use the PDFA: (Archival) format to enforce the output from Imagemagic be PDFA, but this version of the format is contested in certain area since we can embed about anything in the PDF. A more convenient output would be to have a PDF/A-1 (ISO19005) output that is more commonly accepted, and implemented in lots of products like LibreOffice for example.

Steps to Reproduce

Using the command line:
convert images/*.tiff pdfa:output.pdf

And opening the file in adobe acrobat reader DC will reveal that the PDF is a PDFA but using this revision 3B that can support embedding of a tons of stuff. We would like to have the ability to have the PDFA-1 (Iso 19005 instead)

System Configuration

Windows 10

• ImageMagick version: Last version (beta)
• Environment (Operating system, version and so on):
• Additional information:
  Link to the standard:
  https://www.iso.org/standard/38920.html