title: Android, how to set meta data to MP4 file?
body: <p>I would like to set meta data to MP4 file.</p>
  
  <p>I create MP4 file via:</p>
  
  <pre><code>new MediaMuxer(mPath, MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4)
  </code></pre>
  
  <p>and file has meta:</p>
  
  <pre><code>Title:   unknown
  Artist:  unknown
  Album:   unknown
  Comment:
  ...
  </code></pre>
  
  <p>similar as: <a href="http://i.stack.imgur.com/GILkM.png" rel="noreferrer">Here</a></p>
  
  <p>I found that for API21+ i could make metadata via: <code>MediaMetadata.Builder</code> but how could i save metadata to created MP4 file?</p>
  
  <p>Without extern library please.</p>
  
  <p>Thank you.</p>