ffmprovisr/app/views/generate/generate.html.erb

<div class="container">
  <h1>ffmprovisor</h1>
  <p>
    <div class="form-group">
      <form>
            Video format: 
          <select name="input[video_format]">
          <option value="nil">Select video format</option>
          <option value="mp4">Mp4</option>
          <option value="h264">h264</option>
          <option value="flv">FLV</option>
          </select>
        <br /><br />
        Video input: <input type="text" name="input[video_input]">
        <br /><br />
        Video output: <input type="text" name="input[video_output]">
        <br /><br />
        <button type="submit" class="btn btn-primary btn-lg">Submit</button>

        </form>

        <br />
        Command: <textarea rows="1" cols="75" action="output">
      <%= @output %>
      </textarea>
    </div>
  </p>
</div>