tle">Parameters</h5>
      <table class="jd-tagtable">
        <tr>
          <th>format</td>
          <td>The media format for the track.</td>
        </tr>
      </table>
  </div>
  <div class="jd-tagdata">
      <h5 class="jd-tagtitle">Returns</h5>
      <ul class="nolist"><li>The track index for this newly added track, and it should be used
 in the <code><a href="../../../reference/android/media/MediaMuxer.html#writeSampleData(int, java.nio.ByteBuffer, android.media.MediaCodec.BufferInfo)">writeSampleD