Olympus E500 ORF files

[Tarn]

I have a great little batch file that used DateTimeOriginal, and FileNumber to (accurately) rename my files. This works like a charm on my Nikon NEF files. However, when I use it on my Olympus files I come to a complete stop. Reason being, there is no "FileNumber" in the ORF, or JPG files. I've looked for similar tags, such as: "ShutterCount", "ShutterNumber", "*num*" and so on. Nada. I've even used -all and sent it to a text file and searched for the file number ("1955" from "P2071955") and still nothing.

Am I missing something, or is the number that the camera puts in the image file name not recorded in the file? Do I need to store the number in UserComments, or create a tag for it? Or is there a tag, that I'm not finding, that has that info?

Thanks in advance.

[Phil Harvey]

Not all makes store the image number in the metadata.  Your idea of writing the original file name to another tag is a good idea.  Or, you can just preserve the number in the file name when renaming:

exiftool "-filename<${datetimeoriginal}-${filename;s/.*(\d{4}\.)/$1/}" -d ...

The advanced formatting expression above is one way you could preserve the last 4 digits of the file name.

- Phil