What's the easiest way to overlay an image on a video sequence?

Question

Video processing

There is a task - to overlay a different text, image, etc. on the picture coming from the camera. Tell me what software / hardware to look at, maybe someone came across examples of the implementation of such a program.

Answer 1

enough of these GIFs with travolta

Answer 2

As part of the Wowza transcoder, there is a graphic overlay feature, try it.