Sorry for the misinformation, looking at pyglet.image.codecs.pil it follows that loading animations with pil is not supported (no method decode_animation in the decoder) so it should come from other decoder.
In windows animations loads from codecs\gdiplus , i guess in linux loads from codecs/gdkpixbuf2 ; you can confirm that by commenting out in codecs.__init__ the block # Linux default: GdkPixbuf 2.0 if compat_platform.startswith('linux'): try: from pyglet.image.codecs import gdkpixbuf2 add_encoders(gdkpixbuf2) add_decoders(gdkpixbuf2) except ImportError: pass and run your test in the machine where it was working; now it should not work. At least you can confirm if the problem comes from gdkpixbuf2 On Sun, Dec 8, 2019 at 5:29 PM Volker Süß <versus...@gmail.com> wrote: > on ubuntu 19.10 : > > python-pil:amd64 > 6.1.0-1 amd64 Python Imaging Library > (Pillow fork) > > > on ubuntu 18.04: > > python-pil:amd64 > 5.1.0-1 amd64 Python Imaging Library > (Pillow fork) > > -- > You received this message because you are subscribed to the Google Groups > "pyglet-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to pyglet-users+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/pyglet-users/01af2a0c-58f2-482d-8603-df2f57190a7c%40googlegroups.com > <https://groups.google.com/d/msgid/pyglet-users/01af2a0c-58f2-482d-8603-df2f57190a7c%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "pyglet-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to pyglet-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/pyglet-users/CAP3BN9W9red%2BHFqbrtq_G9K4grxBBbD%2B_0CCgRX4pbqhnOf4Kg%40mail.gmail.com.