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Title: may be a missing tag into Exiftool db
Post by: mahikeulbody on September 03, 2012, 08:40:58 AM

When I do exiftool -G1 -j file.jpg (see attached file) I get 'IFD1:XResolution' and 'IFD1:YResolution' tags which are not known in the Exiftool db such as provided by exiftool -listx -s -f. I have a Canon S95 camera. They are maybe some others IFD1 tags with this problem*.

NB. I get also 'IFD0:Xresolution' and 'IFD0:YResolution' which are known in the db.

Edit: There are also the following tags:
IFD1:ResolutionUnit
IFD1:Compression

Title: Re: may be a missing tag into Exiftool db
Post by: Phil Harvey on September 03, 2012, 08:05:13 PM

The ExifTool database doesn't list all of the possible locations of the EXIF tags. In TIFF images, most of these tags may exist in any IFD# or SubIFD# (where # is any number). The family 1 group listed in the database for EXIF tags is only the common location.

- Phil

Title: Re: may be a missing tag into Exiftool db
Post by: mahikeulbody on September 04, 2012, 02:00:07 AM

Thank for the answer.

I fail to understand why a camera maker decides to put the same information within two different fields of the same file...

Title: Re: may be a missing tag into Exiftool db
Post by: Phil Harvey on September 04, 2012, 07:07:46 AM

For some things this makes sense (ie. the thumbnail resolution is different than the main image), but for other things it doesn't (some Sony cameras write the Model to both IFD0 and IFD1, which is just weird).

- Phil

ExifTool Forum

ExifTool => The "exiftool" Application => Topic started by: mahikeulbody on September 03, 2012, 08:40:58 AM