[PD] [Gem] fork pixes

[Peter P.]

Hi list,

I am puzzled by a simple problem in Gem but am unable to find a solution
from Gem's documentation: 

Playing back anim-1.mov from one pix_film object and forking the
pix-stream using [t a a] in order to be able to crossfade between its
color and greyscale version, I am getting a grey picture in the
unmodified branch as soon as the right outlet of [t a a] is connected to
[pix_2grey] inlet, even with that object's outlet being left unconnected.
(see attached patch)
I don't understand why this happens, I have checked all colorspaces with
[pix_info] and they are alike (RGBA). Is there a better way to crossfade
between a color image and its grayscaled version?

Thanks for all ideas!
Peter
-------------- next part --------------
#N canvas 732 47 509 439 10;
#X obj 16 119 pix_film;
#X obj 16 349 pix_texture;
#X obj 16 395 rectangle 4 3;
#X obj 256 88 gemwin;
#X msg 266 64 create \, 1;
#X obj 32 64 openpanel;
#X obj 32 42 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1
-1;
#X msg 256 41 0 \, destroy;
#X obj 16 18 gemhead;
#X obj 89 147 sel 0;
#X msg 89 118 0;
#X obj 79 273 hsl 128 15 0 1 0 1 empty empty empty -2 -6 0 8 -262144
-1 -1 0 1;
#X obj 16 151 t a a;
#X msg 32 88 open anim-1.mov \, auto 1;
#X obj 16 297 pix_mix 0;
#X obj 48 230 pix_2grey;
#X connect 0 0 12 0;
#X connect 0 2 9 0;
#X connect 1 0 2 0;
#X connect 4 0 3 0;
#X connect 5 0 13 0;
#X connect 6 0 5 0;
#X connect 7 0 3 0;
#X connect 8 0 0 0;
#X connect 9 0 10 0;
#X connect 10 0 0 1;
#X connect 11 0 14 2;
#X connect 12 0 14 0;
#X connect 12 1 15 0;
#X connect 13 0 0 0;
#X connect 14 0 1 0;
#X connect 15 0 14 1;