title: How to convert .pb to TFLite format?
body: <p>I downloaded a <code>retrained_graph.pb</code> and <code>retrained_labels.txt</code> file of a model I trained in Azure cognitive service. Now I want to make an Android app using that model and to do so I have to convert it to TFLite format. I used toco and I am getting the following error:</p>
  
  <pre><code>ValueError: Invalid tensors 'input' were found.
  </code></pre>
  
  <p>I am basically following this tutorial and have problem on step 4 and direcly 
  copy pasted the terminal code:
  <a href="https://heartbeat.fritz.ai/neural-networks-on-mobile-devices-with-tensorflow-lite-a-tutorial-85b41f53230c" rel="noreferrer">https://heartbeat.fritz.ai/neural-networks-on-mobile-devices-with-tensorflow-lite-a-tutorial-85b41f53230c</a></p>