title: How to get the file diff between two S3 buckets?
body: <p>So I have an S3 bucket of videos (several hundred), upon which I used ElasticTranscoder to transcode everything into a second, optimised bucket.</p>
  
  <p>However, when I inspect my second bucket, there are 40-50 less objects, but I cannot figure out what they are (the directory structure is deeply nested etc).</p>
  
  <p>How can I get the file diff of two buckets using <code>aws s3api list-objects</code>?</p>
  
  <p>Perhaps there are files in the bucket which are not videos, which I somehow didn't know about.</p>