Here is a photo of the "Time Line", after an eight-minute film (click on image to view larger). Strange to say that all this mess once placed end to end is something Coheris! (Here an eight-minute film, approximately).
It should be noted that even if the "Time line presented seems completely haphazard, it is far from it. For this project I worked on 3 audio and 5 video tracks. They are organized as follows :
- Video 4
- Video 3
- Video 2
- Video 1
- Video Main
- Sound of raw video
- Music
- Narration
This shows that it works by stacking: when multiple video tracks are superimposed, it will appear on the screen the more above the runway (here "Video 4").
So what is it to have multiple video tracks on top of each other, if one sees only more above? you say. Well, suppose we want to film a scene in front of a specific scene, and that impossible for actors to move there, or so, we want to place actors in front of a completely imaginary scene. We therefore wish to have the actors in the foreground and scenery in the background.
It is here that the "Blue Screen" or green technology "Overlay". (Note that we use blue or green only because they are the only colors that do not appear on the human body). Our actors are filmed against a blue background on one side, then our other decor. Then we superimpose the two videos (the scenery below and above the actors), and removes the blue. Thus, we have a composite image of a foreground and background that is generally consistent enough, but no actor has set foot before this scene.
It is this technique that I used for the scene from "Sin City" in the film of VBAC, but this time with 3 different planes:
- Mehdi and Alizée (1 plan )
- Balcony (second level)
- City (Background)
These are pictures, step by step:
Mehdi and Alizée, filmed on a blue background.
A painting by Francisco de Goya
(for the wrought iron balcony)
A background of City
(for now, it is in color with a name underneath, but will remedy)
is happening in green (or blue) everything that interests us not the original image.
(Me, I used Paint;))
We pass this picture in black and white, it is removed address Internet bugging us to start (again, I used Paint!)
Finally, we superimpose all these images, and voila! Note that here, for the purposes of the film, we kept only the red as the color. But that's another story!