Duplikat Aktor

Step 1: Shooting

Place the camera on a tripod or stable mount. There must be no camera movement at all, and the background of the scene should be unchanging.

Use the camera's manual functions and keep the settings consistent — you don't want the auto-focus or auto-iris changing during the shot.

Record the first shot of the actor in one position, then record the second shot with the actor in the other position. If the actor needs to interact with his alter-ego, you need to practice and time the actions so they can be synchronised later.

Step 2: Compositing

Place the two clips in the timeline of your editing application, with one clip in a layer above the other.

The next task is to remove the left half of the upper clip, so the left half of the lower clip becomes visible. Exactly how you do this will depend on your software and personal preference — for this tutorial we will use the Linear Wipe effect in Adobe Premiere (Effects > Transitions > Wipe). Most editing packages provide similar transition effects. You could also use a cropping tool or any other tool that allows you to make parts of the picture transparent.

Effects Control PaletteApply the wipe effect to the top clip. In the Effects Control palette, move the Transition Completion slider to about halfway across the frame, or until the desired part of the lower frame becomes visible. Set the Feather value fairly high to smooth the transition between the two halves.

You can also change the Wipe Angle if you don't want to have a vertical split.

Now that you can see both versions of the actor together, adjust the position of the two clips relative to each other to get the timing right (drag one of them left or right).

That's basically all there is to it — you're done!