title: fragmented mp4 javascript converting
body: <p>I wanted to know if there is a way to convert regular mp4 to a fragmented mp4 via javascript. (like mp4box does) Is it efficient enough (not suppose to be a complicated task)? did anyone write something like this?
  to make it harder, can it be on the fly? meaning I will not download the whole mp4 from the server but download in parts and convert it into fragments compatible with fragmented mp4 and mpeg-dash  - I'm trying to overcome to problem to not have to use 2 different file types to play a video or do mp4box on all my library in advance.</p>
  
  <p>Regardless, is it possible to convert from h.264 compatible files with different containers (mov, flv etc.) to fragmented without a server? meaning do it in the browser with javascript somehow? </p>
  
  <p>appreciate the help,
  Yug</p>