+1 We've been using both zencoder and filepicker for our Ember/Rails app and that is exactly how it works. Ember posts fpurl to our Rails API, rails hits zencoder to kick-off processing job. API keys stay secure and files never pass thru our system. Awesome!
Awesome! I had no intention of the advanced demo getting as big as it did, otherwise I would have used Ember from the beginning. We're going to post a longer tutorial using Filepicker + Zencoder + Socket.IO pretty soon.