As well as featuring Seth Troxler and the party in Paris, the 5th episode of REBELRAVE will also show an interview with a Japanese illustrator called Saeko, who didn’t want to be shown in the video.

I had to think of a way of showing her answering Anna’s questions, without letting the viewer recognize her face.
My initial idea was to get Saeko to film herself with a webcam, whose feed got projected onto a wall where Anna was standing. The outcome was pretty impressive (a huge image of Saeko’s face projected next to Anna), but I still needed to conceal the projected face.
It was at that point, when looking for live webcam effects, that I came across Quartz Composer, which is an amazing tool that lets you manipulate the video feed from your webcam.

I added some halftone effects to the video feed, after which I found out that I could also grab the information sent by the microphone. So triggered by the volume of the input audio I made the halftone effect increase and decrease.. The result got me jumping up and down in my bed: as usual it was something like 4am, and this is the sort of thing I do when I can’t sleep..

So now I had managed to achieve a fairly cool way of showing Saeko’s face, with the projection effect throbbing up and down depending on when she spoke.

Here’s some screenshots:

After being satisfied with all of this, I looked down the list of options in Quartz Composer to see what other goodies it may contain: mouse, keyboard and MIDI control! Perfect! I could now insert videos and images over Saeko’s face while she gave her interview, LIVE! No post production needed.
For example when she spoke about Damian Lazarus, I triggered a short video loop of him to flicker on. I also used this so she could talk about specific pieces of her work.

Here’s a screenshot of how the file looked like in Quartz Composer’s… hot!!!!