title: How does Udemy mash-up a PowerPoint presentation with a video for a synchronized play?
body: <p>If you have used Udemy (I have used Zenation earlier, which is not as good as the app developed by Udemy.) to create a mash-up of a .ppt file with a video, you would know how wonderful it is. I would like to get an overview how they have built this application.</p>
  
  <p>My guess is that first the application converts the .ppt slides into JPEG images which are then imported to flash so that the user can easily time-stamp the images while the video plays. Pretty much like sub-titles work. But, I am not sure about my guess. Does anyone have a better idea or give a few pointers to build this kind of application?</p>
  
  <p>My professor wants to have an answer from me by Monday. Could you guys give an answer soon, so that I can work on my assignment this weekend?</p>