[FFmpeg-user] Q about overlay and live sources

[Jim Shupert]

I have been reading about the 38.102 overlay 
<http://www.ffmpeg.org/ffmpeg-all.html#toc-overlay-1>  filter

I have looked at
https://trac.ffmpeg.org/wiki/Create%20a%20mosaic%20out%20of%20several%20input%20videos
and
http://www.ffmpeg.org/ffmpeg-all.html#overlay-1

I was wondering if It is possible to do this with live streams

like taking 2 ip cameras and making a single stream that could go to youTube

Thanks

J