I did a 2-up from a PDF file with:
$ pdfjam input.pdf '{},1-' -o output.pdf --nup 2x1 --papersize '{34.8cm,19.5cm}'
and saved the bookmarks with:
$ pdftk input.pdf dump_data output bookmarks.txt
Now, I want to restore the bookmarks in output.pdf. How can I modify bookmarks.txt in the proper way and then re-inject it in output.pdf?
pdftkoutputs metadata including bookmarks. Could you share your bookmarks.txt in some way? 0x0.st might be useful.