I may have mentioned this before, but I can’t find the discussion so please excuse if this is a repeat.
We want to superimpose a laser pointer in mimoLive onto a high quality framegrabber image using a location identified by capturing the physical laser location on a projected PowerPoint/Keynote screen.
Has anyone ever done this? Would this pseudo laser pointer require a custom layer?
Have an extra camera pointed at the screen. Use that image to capture the projected image and the green dot from our laser pointer. Use that green dot as a chroma key on a solid colored layer (red or green) to create a small dot and put this layer over the high quality frame-grabber image to mimic the laser pointer. We get a high quality image for PIP with a laser pointer.
We use 3 video cameras and a frame grabber (DVI2USB from Epiphan Systems) to capture presentations from a second laptop which also feeds, through a HDMI splitter, a projector feed. We often use PIP with a small talking head and a large live PowerPoint/Keynote feed from the computer. This optimizes the captured presentation quality and avoids a camera showing the presenter and the screen simultaneously where the presentation is brighter than the presenter and the captured presentation quality is poor.
What we don’t capture, however, is when the presenter uses a laser pointer to highlight parts of the presentation – and no we do not want them “driving” a mouse or trackpad.
We would be happy to have a 4th camera pointed directly at, and only at, the projector’s screen image.