Webcam.js + Rails + Carrierwave

Webcam.js: https://github.com/jhuckaby/webcamjs
Rails: https://github.com/rails/rails
Carrierwave: https://github.com/carrierwaveuploader/carrierwave

To get working with Rails and Webcam use:

1°:

• Generate a new rails app. $ rails g new YOUR-APP-NAME
• Enter in this directory. $ cd YOUR-APP-NAME/

2°:

• Open https://github.com/jhuckaby/webcamjs and download as zip (or clone).
• Copy the webcam.min.js and webcam.swf to vendor/assets/javascripts.

3°:

• Open assets.rb and add this line: Rails.application.config.assets.precompile += %w( webcam.swf )

• Open app/assets/javascripts/application.js and add: //= require webcam.min between the turbolinks and . like this:

  //= require turbolinks 
  //= require webcam.min
  //= require_tree .

4°:

Add to your Gemfile this gem (I've removed all unused gems from this app):

gem 'carrierwave' 
gem 'carrierwave-base64' 
gem 'rmagick' # have any error? see this link: http://stackoverflow.com/a/5207041

And them bundle:

$ bundle install

5°:

• Generate a new uploader: $ rails g uploader ProductImage
• Generate a simple scaffold: $ rails g scaffold product name image
• Open config/routes.rb and set the root url: root 'products#index'

6°:

• Create a new file inside app/assets/javascripts called cam.js with this content:

function take_snapshot(){
    Webcam.snap(function(data_uri) {
        id = $('[id*="_image"]');

        if (id.length) {
            id.val(data_uri);
        }

        document.getElementById('results').innerHTML = '<img src="' + data_uri + '"/>';
    });
}
$(document).ready(function() {
    if ($("#my_camera").length) {
        Webcam.set({
            width: 320,
            height: 240,
            image_format: 'jpeg',
            jpeg_quality: 90
        });

        Webcam.attach('#my_camera');
    }
});

• Now you have to add the calling inside the view:

<%= form_for(@product) do |f| %>
  <div id="my_camera"></div>

  <input type=button value="Take Snapshot" onClick="take_snapshot()">

  <div class="field">
    <%= f.hidden_field :image %>
    <%= f.label :image %>: <br />
    <div id="results">Your captured image will appear here...</div>
  </div>

  ...
  <!-- Other fields and submit button -->
<% end %>

• Inside your model add the uploader:

class Product < ActiveRecord::Base
  mount_base64_uploader :image, ProductImageUploader
end

Any problem, please add a new Issue.
Dudes? See the source code.
That is it! just use your rails application with a webcam in it!