Does no one has an idea about this?

Did someone test the ico file I linked, too? Can my problem be
reproduced by others?

On 2019-06-10 14:17 "c.buhtz--- via python-hackers-list"
<python-hackers-list@gnome.org> wrote:
> This question is about ico-files which contain more then one icon
> usually in multiple sizes.
> 
> The current example can be found here. I am not sure if the problem is
> me or the ico file itself is not valid.
> 
> https://www.jabref.org/favicon.ico
> 
> In Firefox the icon looks like expected. When I open the (with
> aiohttp) downloaded ico file with IrfanView (via wine on Debian
> stable) or with Gimp it looks like expected. Especially in Gimp I can
> see the icon in multiple sizes (each in one GIMP layer).
> 
> Fine.
> 
> I want to open it with GdkPixbuf "scale" it to 16x16 (or select the
> correct size). This Pixbuf I want to use as an icon in a Gtk.TreeView
> and I want to store it back into an ico file.
> 
> This doesn't work because the scaled result looks like picture noise
> on an old TV.
> 
> What I tried so far...
> 
> org = GdkPixbuf.Pixbuf.new_from_file('_favicon.ico')
> small = org.scale_simple(16, 16, 2)
> small.savev('small.ico', 'ico', '', '')
> 
> and
> 
> org = GdkPixbuf.Pixbuf.new_from_file_at_size('_favicon.ico', 16, 16)
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