Rails 3: How to configure Zencoder to work with Amazon S3? - ruby-on-rails

Question

I'm following this tutorial to integrate Zencoder in my Rails 3 app: http://www.nickdesteffen.com/blog/video-encoding-with-uploadify-carrierwave-and-zencoder
The tutorial uses Rackspace for storage, but I'd like to adapt the code so that I can use Amazon S3 for storage instead. I replaced all the Rackspace info with my Amazon S3 info, but whenever I try to upload a video in my form, I get this HTTP error: "There was an error with the file you tried uploading.Please verify that it is the correct type."
What do I need to fix here to make this work?
carrierwave.rb
CarrierWave.configure do |config|
config.fog_credentials = {
:provider => 'AWS',
:aws_access_key_id => 'xxx',
:aws_secret_access_key => 'xxx',
}
config.fog_directory = 'mybucket'
config.fog_public = true
config.fog_attributes = {'Cache-Control' => 'max-age=315576000'}
end
video_uploader.rb
class VideoUploader < CarrierWave::Uploader::Base
include Rails.application.routes.url_helpers
Rails.application.routes.default_url_options = ActionMailer::Base.default_url_options
after :store, :zencode
def store_dir
"uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
end
def extension_white_list
%w(mov avi mp4 mkv wmv mpg)
end
def filename
"video.mp4" if original_filename
end
private
def zencode(args)
zencoder_response = Zencoder::Job.create({:input => 's3://mybucket/key.mp4',
:outputs => [{:label => 'vp8 for the web',
:url => 's3://mybucket/key_output.webm'}]})
zencoder_response.body["outputs"].each do |output|
if output["label"] == "web"
#model.zencoder_output_id = output["id"]
#model.processed = false
#model.save(:validate => false)
end
end
end
end

Answer 1

I've been working on the same issue.
Using Fog for my credentials I created my urls like so:
bucket = AttachmentUploader.fog_directory
input = "s3://#{bucket}/#{self.path}"
base_url = "s3://#{bucket}/#{store_dir}"
Take a look at my gist for more detail: https://gist.github.com/4002368
Don't forget to allow Zencoder to acces your bucket via security policy: https://app.zencoder.com/docs/guides/getting-started/working-with-s3