title: Android - combining two MP4 files
body: <p>I'm writing an Android project where I'm recording several audio files. Therefore, I'm setting the following parameters. The recording works fine. </p>
  
  <pre><code>recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
  recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
  recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
  </code></pre>
  
  <p>My problem is that each time I record, the output is written in a separate file. Now, I need to combine these files to one file. Does anyone have an idea how to combine several MPEG 4 files in an Android project?</p>
  
  <p>Thanks for your help.... </p>