Convert documents to PDF/A format

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Convert documents to PDF/A format

Hello guys,

I am trying to convert doc to pdf/a using jodconverter and libreoffice. Default configuration allows to generate only 1.4 or 1.5 format. The only official option I have found is to use a proprietary "Document transformation engine". I don't like it because you need a windows server and ms office.

LibreOffice supports generation PDF/A via "SelectPdfVersion" property in a user configuration file (registrymodifications.xcu)

The configuration "registrymodifications.xcu" is created dynamically when a transformation is called by jodconverter (hope so). I need to add the "SelectPdfVersion" line to it somehow.

Libreoffice runs as a service in my environment (docker). 

/opt/libreoffice6.1/program/soffice.bin -accept=socket,host=,port=8100;urp; -env:UserInstallation=file:///tmp/.jodconverter_socket_host- -headless -nocrashreport -nodefault -nofirststartwizard -nolockcheck -nologo -norestore

I tried to rewrite the jodconverter library in (repository docker) /usr/local/tomcat/webapps/alfresco/WEB-INF/lib/alfresco-jodconverter-core- to put this config dynamically to (libreoffice docker) /tmp/.jodconverter_socket_host- but it doesn't seem to have any effect. 

Also try patch and OOoDirect approach from link below, but I cannot find the relevant configuration files (openoffice-document-formats.xml).

Is there any way to set alfresco to generate PDF / A?