and so far every file has remained solid, and the OCR layer has not been corrupted. I have tested several PDF viewers, adding highlights, restarting DT3, etc. I am running Ubuntu 18.04 in VirtualBox and the PDFs created by Calibre are unbreakable in DT3 (they require no post-processing, either), on either Catalina or Mojave. The best workaround I have found so far is complicated to set up, but so far works flawlessly: use Calibre on Linux.

When highlighted by DT3 in Catalina, the OCR layer became corrupt. In the previous workaround above, the PDFs created by Calibre worked in DT3 after post-processing them with ghostscript-but only in Mojave. This happens on both Catalina and Mojave. Importing both PDFs into DT3 and highlighting them results in the PDF from Chromium changing from Kind “PDF+Text” to “PDF” (though it may only happen after restarting DT3). I confirmed this by printing a webpage to PDF from within Chromium (or Chrome) on MacOS and printing the same page to PDF from Firefox or Safari. According to the developer, Calibre uses Chromium’s print-to-pdf routine to convert ebooks to PDF format, and something about the PDFs created by Chromium on MacOS (apparently having to do with CID fonts, etc.) Has anyone found a good solution for converting ebooks to PDFs that work in DT3? I need to convert several hundred ebooks and need PDFs that have the TOC (Calibre does this beautifully) and also work as expected in DT3, with full-text indexing, highlighting, copying/pasting, etc.įor anyone who may be interested, it seems that the root issue of all this headache has to do with how Chromium creates PDFs on MacOS. Note: Preview also does not see any text when searching within the PDF (though it can select it easily), suggesting this may be a MacOS issue that is visible in DT3, as it uses the same engine. The link above seems to suggest that this is due to the way Calibre generates the PDF, combined with the way MacOS handles (or fails to handle) the PDF.

They are not searchable, and though text can be highlighted and the TOC displays correctly, selected text does not copy (or paste) correctly. I have some ebooks that I converted to PDF using Calibre 3.44 but, on import, DT3 says the PDFs have “no text”. I expect this is related to this one (buggy-handling-of-pdf-text-due-to-pdfkit-engine/24411), but it is several months old.

Pdf to epub calibre