title: Can I use the Gstreamer API to merge 2 videos?
body: <p>I'd like to write a simple linux CLI application that can take 2 video sources (1 of a presenter talking and 1 with their slides and no audio) and merge them.</p>
  
  <p>I'd like the entire output video to be the two original videos, side by side. Failing that, my second best option would be a "picture in picture" style video, with the presenter in a small frame in the corner.</p>
  
  <p>From a few hours research, GStreamer looks like it <em>might</em> be able to do this. Can anyone confirm it before I spend more time trying it out?</p>
  
  <p>If it can't, are there other APIs out there that I might be able to use?</p>