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

[Paul Jewell <paul jewell3 14 gmail com>]

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?