ExifTool Forum

[Originally posted by johndoeexif on 2009-06-23 17:56:24-07]

Hello,

I'm using exiftool 7.67 and have a problem with writing EXIF tags to TIFF files:

$ exiftool -v -comment=wow Testdia-225dpi-48Bit.tif
======== Testdia-225dpi-48Bit.tif
Rewriting Testdia-225dpi-48Bit.tif...
  Editing tags in: Comment Ducky MIE-Doc PNG
  FileType = TIFF
  MIMEType = image/tiff
  ExifByteOrder = II
  Rewriting IFD0
  Creating ExifIFD
  Error = [minor] Maker notes could not be parsed
  Rewriting ICC_Profile
  Copying 1 image data blocks
  Preserving unknown trailer (3028 bytes)
Error: [minor] Maker notes could not be parsed - Testdia-225dpi-48Bit.tif
    0 image files updated
    1 files weren't updated due to errors

when ignoring the minor error:

$ exiftool -m -v -comment=wow Testdia-225dpi-48Bit.tif
======== Testdia-225dpi-48Bit.tif
Rewriting Testdia-225dpi-48Bit.tif...
  Editing tags in: Comment Ducky MIE-Doc PNG
  FileType = TIFF
  MIMEType = image/tiff
  ExifByteOrder = II
  Rewriting IFD0
  Creating ExifIFD
  Warning = Maker notes could not be parsed
  Rewriting ICC_Profile
  Copying 1 image data blocks
  Preserving unknown trailer (3028 bytes)
Nothing changed in Testdia-225dpi-48Bit.tif
Warning: Maker notes could not be parsed - Testdia-225dpi-48Bit.tif
    0 image files updated
    1 image files unchanged

I've uploaded the TIFF file here http://rapidshare.com/files/247828127/Testdia-225dpi-48Bit.tif.html
It is from a slide scanner. Is there anything I can do about that?

Kind regards,
Joe

[Originally posted by exiftool on 2009-06-24 10:43:56-07]

Hi Joe,

The Comment tag is a JPEG-specific tag.  Use ImageDescription
instead for TIFF images.

- Phil

[Originally posted by exiftool on 2009-06-24 11:32:46-07]

Sorry, UserComment is probably the corresponding tag for TIFF images.

[Originally posted by johndoeexif on 2009-06-26 17:04:56-07]

Hmmm... okay, now it works when I ignore minor errors:

======== Testdia-225dpi-48Bit.tif

Rewriting Testdia-225dpi-48Bit.tif...

  Editing tags in: ExifIFD IFD0 MakerNotes TIFF XMP

  FileType = TIFF

  MIMEType = image/tiff

  ExifByteOrder = II

  Rewriting IFD0

  Creating ExifIFD

  Warning = Maker notes could not be parsed

  Rewriting ICC_Profile

  Copying 1 image data blocks

  Preserving unknown trailer (3028 bytes)

    1 image files updated

but doesn't if I don't:

======== Testdia-225dpi-48Bit.tif

Rewriting Testdia-225dpi-48Bit.tif...

  Editing tags in: ExifIFD IFD0 MakerNotes TIFF XMP

  FileType = TIFF

  MIMEType = image/tiff

  ExifByteOrder = II

  Rewriting IFD0

  Creating ExifIFD

  Error = [minor] Maker notes could not be parsed

  Rewriting ICC_Profile

  Copying 1 image data blocks

  Preserving unknown trailer (3028 bytes)

    0 image files updated

    1 files weren't updated due to errors

Is this a bad sign?

[Originally posted by exiftool on 2009-06-26 17:11:34-07]

This is a warning that information in the unknown maker notes
and/or unknown trailer may be lost when the image is rewritten.
Likely, the only thing that would use this information is software
by the same vendor that wrote the image.

What software wrote this image?

- Phil