Re: [Gimp-developer] Gimp suggestions and maybe a bug

> Date: Sun, 9 Sep 2012 02:11:38 -0700
> From: m351681 rtrtr com
> To: gimp-developer-list gnome org
> Subject: [Gimp-developer] Gimp suggestions and maybe a bug
> Hello , leave suggestions for the good Gimp
> - when save/export a photo that have exif/iptc/xmp tags if we save/export to
> formats that do not support tags is useful open a warning window that notify
> this situation every time to user for default (optionally deselectable from
> settings), tell something like this "warning: your photo/file have .. Tags
> but your selected saving format do not support tags, all tags will be lose.
> if you overwrite your file all tags are erased"

It can be safely assumed that when you export to a standard file format you can be expected to know something about what kind of metadata that file format does or does not support.  This is not like JPG's lossy compression where we can safely assume that if you're exporting back to the same file you will be degrading the image quality.  So I don't see an issue here, and adding back a warning about only "potential" loss of metadata (most of which is non-essential to the interpretation of stored image pixels anyway) does more harm than good.

> - extend preserve write exif/iptc/xmp tags support to TIFF format (and/or
> another lossless format).
> Tiff already support exif/iptc/xmp tags, for example Xnview preserve/write
> tags on tiff (but probably also other free tools). maybe ask xnview
> developer if want donate tiff writing code and contribute with gimp :)
> For professional/advanced use It's really important have tags preservation
> in at least one lossless format (tiff, xcf, or another), for use it for
> multiple editings without have quality loss, or without need use every time
> exiftool for rewrite tags.

Last I heard, the problem with TIFF metadata is that GIMP's TIFF loader doesn't actually inform GIMP about unrecognized metadata tags in the file that could be lost if the user exports back to the same target.  It only loads the image pixel data and any metadata it supports, other file tags are effectively removed and there's little to no way (at present) to change this behavior. 

-- Stratadrake
strata_ranger hotmail com
Numbers may not lie, but neither do they tell the whole truth.

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