it seems ffmpeg extract images does not skip workitems that are already saved to disk. some videos have been converted to sequences but this node extracts them again and again each time i run it overwriting what is already there.

usually for example a fetch rop will not redo exports that are already on disk.

Is there a way to fix this?
the same happens if i use a custom command to extract the audio as well. each time i dirty these nodes and re-run it does not skip workitems that were already cooked previously