thanks for your answer.
I already know the use of Keyframe and the Zoom.
May be I didn't explain well myself.
I want to make a tansition between 2 clip making a Custom Transition using a Zoom-in Technic used in After Affect.
To be more specific, I want to have in the second clip, a zoom-out frame in the first keyframe, and after few frame (about 5 or 10) restore the frame to the normal dimension using the second frame.
The problem is about the fist keyframe has the dimension of original clip too small arounded by black edge.
The tecnich take from After Effect is crate e mirror clip on all the side of the original frame and other 4 on the corner.
In that way we can cover all the keyframe letting in to the center the zoomed-out clip.
It's very difficult to explain. My english is not good. I'm Italian.
Try to explain with image.
This is the second clip where I want to make the Zoom Effect, not like the effect used in LumaFusion.
As you can see the clip is more small of the frame
Schermata 2018-05-08 alle 17.44.00.png [ 86.31 KiB | Viewed 746 times ]
To fill the black part we can use e Mirrors edge effect like this
Schermata 2018-05-08 alle 17.44.28.png [ 191.16 KiB | Viewed 746 times ]
After that if you put the effected clip to the first Keyframe, and set after 5 o 10 frame the scend Keyframe zooming the clip, you can obtain very good tool to complete the Zoom transition.
Hope I explained myself.