see https://askubuntu.com/q/404567/733411
to have also hours, minutes and second, use:
exiftool '-filename<CreateDate' -d %Y%m%d%H%M%S%-.4nc.%%le -r
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see https://askubuntu.com/q/404567/733411
to have also hours, minutes and second, use:
exiftool '-filename<CreateDate' -d %Y%m%d%H%M%S%-.4nc.%%le -r