My intention was the setup.
VGA ---> TVOne ---> DeckLink Intensity Pro HDMI.
That looks like a fantastic solution in quality - price.

But I need a solution that does not give me any problems if there are videos or animations, embedded in PowerPoint.
Or if the client happens to shoot a video from your computer. And tell me 5 minutes before the show.

So I think the solution,
VGA -> Scaler to HD / SDI ---->Phonenix HD / SDI, seems the perfect solution.

Am I wrong?

A greeting and thank you very much.

E.Cueto