--- Johannes Sixt <[EMAIL PROTECTED]> wrote:

> On Monday 22 October 2007 19:50, Johannes Sixt wrote:
> > On Sunday 21 October 2007 22:06, Z F wrote:
> > > I would like to make a movie with a "chroma key" background and
> replace
> > > the background with another movie.
> > >
> > > Could some one describe step by step what needs to be done?
> > >
> > > I have loaded a movie and attached chroma key effect to it. It
> appers
> > > that
> > > I can make the background black, but how to make a mask out of
> it? How
> > > to make the second video track appear in the mask?
> >
> > You put it in a second video track below it. You need a project
> format with
> > an alpha channel (RGB, YUVA).
> 
> Make this RGBA, of course!
> 
> -- Hannes

Oh, thanks!! 

I think this was my mistake.

I will try.

ZF

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