Actually I’m trying to make a patcher which the frequency/pitch of the audio input triggers the display of different colors (e.g. an A note triggers a blue color). I’ve built this part already. Then, I want to add the color into the video output, which is from the live camera, so that the color changing can appear on the live video. My ultimate goal is to change the color only to the face detected in the live video, but that’s a bit beyond my capacity for now. Therefore, I’m trying to add the color into the live video first as a color filter. Does anyone have any idea?