encEncode

<!-- setting the file and format for the input item -->
<arc:set attr="enc.file" value="[FilePath]" />
<arc:set attr="enc.format" value="BASE64" />

<arc:call op="encEncode" in="enc" out="result">
  <!-- setting the output file data to be the encoded data returned from the operation -->
  <arc:set attr="output.data">[result.encodeddata]</arc:set>
</arc:call>

<!-- setting the filename and pushing the file out -->
<arc:set attr="output.filename" value="[FileName]" />
<arc:push item="output" />