I dont see much point in this. PDF supports the XMP metadata standard.
Simply use a PDF metadata editor that supports XMP, such as calibre
itself (the ebook-meta command line tool from calibre). calibre prefers
XMP metadata over the Info dict, unless the latter has a newer mod date.
See the metadata_from_xmp_packet() function in the calibre source code
for how exactly XML metadata is mapped to calibre metadata.
I dont see much point in this. PDF supports the XMP metadata standard.
Simply use a PDF metadata editor that supports XMP, such as calibre
itself (the ebook-meta command line tool from calibre). calibre prefers
XMP metadata over the Info dict, unless the latter has a newer mod date.
See the metadata_ from_xmp_ packet( ) function in the calibre source code
for how exactly XML metadata is mapped to calibre metadata.
status wontfix