It seems that the following script may be helpful, by wrapping calls to convert, and using pdftoppm instead of convert for initial PDF opening : https://gist.github.com/olberger/a88e3e2d4c684fdf94bbe5bc69ab9fe2
To be used with pdfsandwich -convert .../convert.sh Hope this helps. I think that maybe the original author should be notified, but as the project used to live on sourceforge and seems a bit old, I'd let the maintainer forward to the best channel. Best regards, -- Olivier BERGER https://www-public.imtbs-tsp.eu/~berger_o/ - OpenPGP 2048R/0xF9EAE3A65819D7E8 Ingenieur Recherche - Dept INF Institut Mines-Telecom, Telecom SudParis, Evry (France)