gistfile1.rb

# Error: invalid API key

# lib/video_encoder.rb
module VideoEncoder

  def self.encode(video = nil)
    response = Zencoder::Job.create({:input => "test.mp4"})
    puts response.inspect
  end

end

# config/initializers/zencoder.rb
Zencoder.api_key = "XXXX"

# models/video.rb
class Video < ActiveRecord::Base

  # Associations
  has_and_belongs_to_many :categories

  # Validations
  validates :title, :video, :poster, :categories, :presence => true

  # CarrierWave Mount Uploaders
  mount_uploader :poster, VideoPosterUploader

  VideoEncoder.encode

end