Sorry, I can't understand you.
It should be doesn't matter on what type of fixture you will assign a VideoIn1 texture at Filter dialog. And that work from picture provided by you!
But for beamer you assigning VideoIn2. Why? Do you have a second capturing card, is it working?

PS. You should correct your profile with License/Videocard details. Otherwise we will stop support you.

Ive update the information you ask.(videocard and License)

Well lets keep it simple. Back to basic.
Can you tell me in a few steps how I can get a live streaming video (from a video capture card) on a projecter. Take the Christie LX1500 as a example.

white a live streaming video signaal i mean a composite input card. The input signal on the capture card is a DVD Player.

I hope this explain a lot for you

Yours Patrick

For video capture card #1:
Select any fixture, go to Filter dialog, open Texture, Movie, select VideoIn1.

Thanks for youre help.

It is working now. I choose videoin1 in the GOBO map. That is of course not the good map.

Ive you choose videoin1 from TEXTURES it works supper.