[pdurrant]

I'm trying to write a filetype plugin that takes as input one file type, but passes a different file type along to Calibre for further processing.

I see that there is one already that takes a PML file (& associated images) and converts into a PMLZ file, so I think it must be possible, but I don't seem to be able to get mine working.

I have been trying to return the new file in a temporary file, as I've done successfully with another File type plugin.

But no joy. Is there anything else I need to be doing in the plugin to tell Calibre that the file type has changed?

Of course, it might just be that I have something else wrong in the plug-in and it isn't getting called. Is there a way to debug a filetype plugin without having to compile up all of Calibre in a debug version?

Thanks for any help.