d</code></a> can be played multiple times, for example if it is repeated. Each
 instances of this class identifies a specific playback of a <a href="../Timeline.Period.html" title="class in com.google.android.exoplayer2"><code>Timeline.Period</code></a>.

 <p>In ExoPlayer's implementation, <a href="MediaPeriodId.html" title="class in com.google.android.exoplayer2.source"><code>MediaPeriodId</code></a> identifies a <code>MediaPeriod</code>.</div>
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