title: How to write on a virtual webcam in Linux?
body: <p>I want to capture a video from a real webcam, apply filters with <strong>openCv</strong> and write the filtered video on a virtual webcam, to stream it on web.</p>
  
  <p>I don't have problem with the first 2 points, but I don't know how I can write on a virtual webcam.</p>
  
  <p>It's possible? </p>
  
  <p>How can I do it?</p>
  
  <p>I use <strong>openCv</strong> with <strong>C++</strong> on <strong>Debian</strong>.
  Thanks</p>