Overlay an image onto live video feed I want to take a live video feed (say from a security camera) and overlay an image over the top of the live video. Is there hardware/software to do this realtime? I don't care about storing the data, and I can't store it to disk first, it needs to be live video in/out with overlay composited on top. Any suggestions?
Gstreamer offers the ability to overlay images on videos and has also excellent live streaming capabilities.

Some useful links:

https://coaxion.net/blog/2013/10/streaming-gstreamer-pipelines-via-http/

https://developer.ridgerun.com/wiki/index.php/Fast_GStreamer_overlay_element#Picture_overlay_examples