Modifying tags in multipage TIFF

Posted on 2009-11-01 07:51:59-08 by bogdan

Hi Phil,

I have a TIFF, containing several pages, where each page has its own IFD entry, e.g. IFD0+IFD1...IFD4. Now, each of IFD contains the same tags (among others): Software, ModifyDate, DocumentName,...
It's easy to modify any tag if IFD is specified... Question:
How do I edit/delete tag in all existing IFDs at once? You know, something like
exiftool -IFDall:DocumentName=Fish image.tif

Another question: In latest version history (v7.98) you wrote, you've changed one Canon tag name. Where can I see which one? Is there any "changing tag names history"? I ask, because my GUI depends on your tag names.

Thanks for answering,
Bogdan

Direct Responses: 11688 | Write a response

Posted on 2009-11-01 10:03:59-08 by exiftool in response to 11687

Re: Modifying tags in multipage TIFF

Hi Bogdan,

Unfortunately there is no way to easily delete something from all IFD's. You must specify each IFD individually. This has come up in the past, but I can't think of an easy way around it.

Sorry for being a bit obscure in the exiftool revision history. I changed "NoiseReduction" to "LongExposureNoiseReduction2". I use the -list option myself to review all tag name changes for each release, perhaps this would be useful for you too. I just do a "diff" with the tag list from the previous release.

- Phil

Direct Responses: 11689 | Write a response

Posted on 2009-11-01 10:38:41-08 by bogdan in response to 11688

Re: Modifying tags in multipage TIFF

Hi Phil,

Ok, I can understand about multiple IFD's. I've just thought there's some "secret way" -it happened before you've surprised me :-)

Thank you for telling me about Canon tag -even there are very few tags GUI is allowed to modify, though.

Wish you the best,
Bogdan

Direct Responses: Write a response