hey thanks for the reply
i still try to figure things out and it might be a problem of the converters or formats… what ever I try the result is different. and that is super weird.
The aniamtion is a motionlogo aniamtion- where letters moph to forms that jump around and form a crow
of course the crow is not visible at the beginning
this is what blenders renders to me:

this is the scene
there should be no crow visible at all
– when I tell it to render a singel image – not a sequence- it renders it corretly.
so what am I missing here?