What makes you think there is such an option? I would guess there isn't, or in any case, to the best of my knowledge, it's never been documented (nor have I ever heard of it, or found it via dumping symbols...).
That said, DNG converter *does* support doing one file at a time (pass file on command line), so another option is to put the "intelligence" for avoiding pre-existing files in your bat or js file.
PS: +1 vote for Adobe updating the documentation - not sure what to make of the years-old doc there .
When I open directly the app DNG converter (v 126.96.36.199) there is an on/off option to "Skip source image if destination image already exists"
That's why I am asking this.
Meanwhile, I have manage to detect duplicates via script and save those folders on a special xml.
Oh - thanks. It wouldn't surprise me if such a switch exists but wasn't documented, and I couldn't find it.
Maybe Adobe will enlighten us (and update the doc).
Hi, I am not knowing the direct answer to your question (command line option to skip existing destinations).
However, I found a few command line options not being documented:
-x extract original or so (just guessing from the error message)
-lossy enable lossy compression (full resolution)
-count <number> enable lossy compression with that <number> many pixels (e.g., 16200000 for 16.2MP), UI only offers 15MP here!
-side <number> enable lossy compression with that <number> many pixels along the long side (e.g., 1920 for HD)
I see a symbol "SkipAlreadyConverted" for the UI but didn't find an option to trigger it.
Anybody finding more options, please share.
Adobe, shame on you for not documenting ...