ExifTool Forum

ExifTool => Developers => Topic started by: rollbahn on July 02, 2020, 09:39:15 PM

Title: Can't write -Minolta:FlashExposureComp to jpeg files
Post by: rollbahn on July 02, 2020, 09:39:15 PM
Hi,
I am trying to write to "-Minolta:FlashExposureComp" from my Minolta a-7 film camera data (eg 0.0, +1.0, +2.0) into the scanned JPG images from my Fuji Frontier scanner and nothing is working.

I ended up running the command with -v2 (Rewriting MakerNoteFujiFilm) to see what was going on and I think the issue may be that Fuji has a small MakerNotes section which they use to record the Frame Number and Order Number, which I imagine is used when the scanner is in a photo lab and being used to track orders for customers etc but I don't need at all.

---- MakerNotes ----
Frame Number                    : 36
Order Number                    : 0


I'm assuming you can only have one lot of MakerNotes per file? Or maybe I just can't write "-Minolta:FlashExposureComp" to a jpeg file?

Thanks for your help
Jason
Title: Re: Can't write -Minolta:FlashExposureComp to jpeg files
Post by: StarGeek on July 02, 2020, 09:58:02 PM
Quote from: rollbahn on July 02, 2020, 09:39:15 PM
I am trying to write to "-Minolta:FlashExposureComp" from my Minolta a-7 film camera data (eg 0.0, +1.0, +2.0) into the scanned JPG images from my Fuji Frontier scanner

See FAQ #23 (https://exiftool.org/faq.html#Q23)
    Also note that MakerNotes tags can not be created or deleted individually, so they can only be written if they already exist in a file.

You can't create Minolta:FlashExposureComp if there isn't already a Minolta MakerNotes group in the image.
Title: Re: Can't write -Minolta:FlashExposureComp to jpeg files
Post by: rollbahn on July 04, 2020, 12:19:21 AM
Great thanks StarGeek - I searched forever on Google and couldn't find that answer but that all makes sense. I'll have to use UserComment I guess.

Thanks
Jason