In case, like me, you use SimpleScreenRecorder on Ubuntu to do screencasts, you might be missing something: the ability to embed your webcam’s feed *inside* the screencast (like this little capture on the right side which shows how amazed I am).
Well, there’s a simple, command-line based solution to that, as explained by Maarten Baert, developer of SimpleScreenRecorder: just use one of the 3 following commands (for me, the last one is the only one that works and I haven’t searched *at all* for why the others don’t. I just copy-pasted it.
ffplay -f v4l2 /dev/video0 avplay -f v4l2 /dev/video0
mplayer tv:// -tv driver=v4l2:width=640:height=480 -vo xv
Obviously, for the last one, you can change the resolution just by changing the number there.
You can check the details here: https://github.com/MaartenBaert/ssr/issues/64#issuecomment-27766079
SimpleScreenRecorder is not inside the default Ubuntu packages, so you’ll have to add it to your sources following the procedure in the “Download” paragraph here: http://www.maartenbaert.be/simplescreenrecorder/#features