I need to convert a PDF file to PDF/A.
Which libraries are available? (Preferably Delphi but other platforms should be OK, even .NET).
My preferred option would have been to use http://synactis.com/pdf-in-the-box.htm (which is the one used to create the PDF file that I need to convert to PDF/A), but it seems that the PDF/A files it generates (at least in demo mode for Extended Features) are not valid.
To avoid recreating the PDF from scratch with a new library by painting everything in a Canvas, it would be very convenient that the library took a rendered PDF as input to create a PDF/A (1.4 or greater) version of it as output.