Adding the same XMP to PDF files

[masega1986@hotmail.com]

Hi there, sorry in advance if this question was resolved in other topic, but i couldn't find it.
first of all, i'm completely new in exiftool.

I'm trying to load a XMP file into various PDF files. At the moment, I'm doing it with Adobe Acrobat pro, but with this system, i have to add the same XMP to each PDF file. The result with Adobe Acrobat pro is a file that complies with PDF/A-2a Standard.

What I want to do, is to create a script/batch file to automat this task.
I've tried to do it in the following way.

I've got the next XMP code in a file named metadatos.xmp:

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<?xpacket begin="�" id="W5M0MpCehiHzreSzNTczkc9d"?>
<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 5.3.0">
   <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
      <rdf:Description rdf:about=""
            xmlns:pdf="http://ns.adobe.com/pdf/1.3/">
         <pdf:Producer>Nombre del Productor</pdf:Producer>
      </rdf:Description>
      <rdf:Description rdf:about=""
            xmlns:pdfaid="http://www.aiim.org/pdfa/ns/id/">
         <pdfaid:part>2</pdfaid:part>
         <pdfaid:conformance>A</pdfaid:conformance>
      </rdf:Description>
   </rdf:RDF>
</x:xmpmeta>
<?xpacket end="w"?>

I run the next command in CMD:

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exiftool -tagsfromfile metadatos2.xmp -all:all "justificante (1).pdf"
And reveived the following output:

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1 image files updated
after that run:

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exiftool.exe "justificante (1).pdf"
ExifTool Version Number         : 12.67
File Name                       : justificante (1).pdf
Directory                       : .
File Size                       : 16 kB
File Modification Date/Time     : 2023:10:18 22:44:16+02:00
File Access Date/Time           : 2023:10:18 22:44:17+02:00
File Creation Date/Time         : 2023:10:16 13:32:15+02:00
File Permissions                : -rw-rw-rw-
File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.7
Linearized                      : No
Create Date                     : 2023:10:09 20:11:28+02:00
Modify Date                     : 2023:10:09 20:11:28+02:00
Page Count                      : 1
XMP Toolkit                     : Image::ExifTool 12.67
Creator                         : Mariano
Description                     : Your Description
Title                           : esto es una prueba
Producer                        : Nombre del Productor

1.7 is supposed to be ok (it complies with PDF/A-2a). But, when i open the PDF with acrobat pro, it doesn't says that it is correct (it should have a blue line on under the toolbar saying that we are viewing a PDF/A file). I also check with other PDF validator programs as veraPDF, and the results are the ones post in the image.

Ok, from here I'm running out of ideas. my question is: can Exiftool do what i need?
thanks in advance, and sorry for my english!!

[Phil Harvey]

I don't know why it fails validation.  I don't have a copy of the PDFA-2 specification -- it is imprisoned by the ISO, so I don't know anything about that.  Perhaps linearizing the PDF would help (incorporating ExifTool's incremental update).  This command will linearize a PDF, but you need the "qpdf" utility:

qpdf --linearize in.pdf out.pdf

- Phil

[StarGeek]

Current versions of qpdf allow you to replace the original file, sort of like exiftool's -overwrite_original

qpdf --linearize --replace-input file.pdf

I also check with other PDF validator programs as veraPDF, and the results are the ones post in the image.

What is the output of VeraPDF's report (Save/View HTML/XML buttons at the bottom). I found a StackExchange post which showed the problems with the file.  At least, I'm assuming it's the report, it's not quite clear.