Not sure if this is a dev question, a feature request, or just a question that will result in a FAQ reply.
I'm interested in doing a timelapse video on a 6D, using the forced fps override video method. However, I want to synchronize an external device to the frames being captured. I can handle the external electronics, but I don't know if (1) the AV output or (2) the hotshoe contacts can be manipulated by Magic Lantern, so I know when the camera is about to capture another frame.
I found a Flickr image of the 11 pin AV output's pinout, but none of the labeled pins are an obvious frame sync signal. I won't link to the image as forum software usually frowns on new posters giving URLs, but it's an easy search.