Re: [Gimp-developer] png file exports - disable metadata?

[Ofnuts <ofnuts gmx com>]

On 5/16/19 12:03 AM, Paul Jewell via gimp-developer-list wrote:
> Hi All, I am wondering about a curious event I am seeing related to
> exporting PNG images from Gimp either through the usual interface, or via a
> script like so:
>
> pdb.file_png_save2(gimp.image_list()[0], gimp.image_list()[0].layers[0],
> '/tmp/test1.png', '/tmp/test1.png', 0, 0, 0, 0, 0, 0, 0, 0, 0)
> pdb.file_png_save2(gimp.image_list()[0], gimp.image_list()[0].layers[0],
> '/tmp/test2.png', '/tmp/test2.png', 0, 0, 0, 0, 0, 0, 0, 0, 0)
>
> It seems that exporting these two pngs, some different data is written
> because they have a different sha1sum. (I would guess timestamp, but I
> disabled this with the plugin option as shown) This weirdness does not seem
> to happen with other file formats like webp, raw, etc. Is there any way to
> disable the writing of this extra data?


Can't reproduce. Saving the same PNG twice gives two files with
identical hashes even when saving:

* background color

* gamma

* layer offset

* resolution

* comment




the comment