title: asammdf export mf4 to csv
body: <p>I have a .MF4 file and want to export a list of Channels to a CSV file.</p>
  <p>Following is the function i used:</p>
  <pre><code>list.export(fmt='csv', filename='foo.csv',single_time_base=True, overwrite = True)
  </code></pre>
  <p>empty_channels are skipped by default <a href="https://asammdf.readthedocs.io/en/latest/api.html#asammdf.mdf.MDF.export" rel="nofollow noreferrer">see documentation</a></p>
  <p>in the CSV i dont get any values for a specific Channel because there are multiple Signals with the same name. So he only find the empty channel and skips this.</p>
  <p>How is it possible to get the Signal and add it to the CSV?</p>
  <p><a href="https://i.stack.imgur.com/tZhwF.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tZhwF.jpg" alt="i have the groupnumber and channelindex" /></a></p>