ExoPlayer supports DASH with multiple container formats. Media streams must be
demuxed, meaning that video, audio, and text must be defined in distinct
`AdaptationSet` elements in the DASH manifest (CEA-608 is an exception as
described in the table below). The contained audio and video sample formats must
also be supported (see the
[sample formats](https://developer.android.com/media/media3/exoplayer/supported-formats#sample-formats) section for details).

| Feature | Supported | Comments |
|---|---|---|
| **Containers** |   |   |
| FMP4 | YES | Demuxed streams only |
| WebM | YES | Demuxed streams only |
| Matroska | YES | Demuxed streams only |
| MPEG-TS | NO | No support planned |
| **Closed captions /** **subtitles** |   |   |
| TTML | YES | Raw, or embedded in FMP4 according to ISO/IEC 14496-30 |
| WebVTT | YES | Raw, or embedded in FMP4 according to ISO/IEC 14496-30 |
| CEA-608 | YES | Embedded in FMP4 when signalled using SCTE Accessibility descriptors |
| CEA-708 | YES | Embedded in FMP4 when signalled using SCTE Accessibility descriptors |
| **Metadata** |   |   |
| EMSG metadata | YES | Embedded in FMP4 |
| **Content protection** |   |   |
| Widevine | YES | "cenc" scheme: API 19+; "cbcs" scheme: API 25+ |
| PlayReady SL2000 | YES | Android TV, "cenc" scheme only |
| ClearKey | YES | API 21+, "cenc" scheme only |
| **Ad insertion** |   |   |
| Multi-period playback | YES |   |
| Server-guided ad insertion (xlinks) | NO |   |
| IMA server-side and client-side ads | YES | [Ad insertion guide](https://developer.android.com/media/media3/exoplayer/ad-insertion) |
| **Live playback** |   |   |
| Regular live playback | YES |   |
| Ultra low-latency CMAF live playback | YES |   |
| **Common Media Client Data** **(CMCD)** | YES | [CMCD integration guide](https://developer.android.com/media/media3/exoplayer/cmcd) |

## Using MediaItem

To play a DASH stream, you need to depend on the DASH module.  

### Kotlin

```kotlin
implementation("androidx.media3:media3-exoplayer-dash:1.9.0")
```

### Groovy

```groovy
implementation "androidx.media3:media3-exoplayer-dash:1.9.0"
```

You can then create a `MediaItem` for a DASH MPD URI and pass it to the player.  

### Kotlin

```kotlin
// Create a player instance.
val player = ExoPlayer.Builder(context).build()
// Set the media item to be played.
player.setMediaItem(MediaItem.fromUri(dashUri))
// Prepare the player.
player.prepare()
```

### Java

```java
// Create a player instance.
ExoPlayer player = new ExoPlayer.Builder(context).build();
// Set the media item to be played.
player.setMediaItem(MediaItem.fromUri(dashUri));
// Prepare the player.
player.prepare();
```

<br />

If your URI doesn't end with `.mpd`, you can pass `MimeTypes.APPLICATION_MPD`
to `setMimeType` of `MediaItem.Builder` to explicitly indicate the type of the
content.

ExoPlayer will automatically adapt between representations defined in the
manifest, taking into account both available bandwidth and device capabilities.

## Using DashMediaSource

For more customization options, you can create a `DashMediaSource` and pass it
directly to the player instead of a `MediaItem`.  

### Kotlin

```kotlin
val dataSourceFactory: DataSource.Factory = DefaultHttpDataSource.Factory()
// Create a dash media source pointing to a dash manifest uri.
val mediaSource: MediaSource =
  DashMediaSource.Factory(dataSourceFactory).createMediaSource(MediaItem.fromUri(dashUri))
// Create a player instance which gets an adaptive track selector by default.
val player = ExoPlayer.Builder(context).build()
// Set the media source to be played.
player.setMediaSource(mediaSource)
// Prepare the player.
player.prepare()
```

### Java

```java
DataSource.Factory dataSourceFactory = new DefaultHttpDataSource.Factory();
// Create a dash media source pointing to a dash manifest uri.
MediaSource mediaSource =
    new DashMediaSource.Factory(dataSourceFactory)
        .createMediaSource(MediaItem.fromUri(dashUri));
// Create a player instance which gets an adaptive track selector by default.
ExoPlayer player = new ExoPlayer.Builder(context).build();
// Set the media source to be played.
player.setMediaSource(mediaSource);
// Prepare the player.
player.prepare();
```

<br />

## Accessing the manifest

You can retrieve the current manifest by calling `Player.getCurrentManifest`.
For DASH you should cast the returned object to `DashManifest`. The
`onTimelineChanged` callback of `Player.Listener` is also called whenever
the manifest is loaded. This will happen once for a on-demand content, and
possibly many times for live content. The following code snippet shows how an app
can do something whenever the manifest is loaded.  

### Kotlin

```kotlin
player.addListener(
  object : Player.Listener {
    override fun onTimelineChanged(timeline: Timeline, @TimelineChangeReason reason: Int) {
      val manifest = player.currentManifest
      if (manifest is DashManifest) {
        // Do something with the manifest.
      }
    }
  }
)
```

### Java

```java
player.addListener(
    new Player.Listener() {
      @Override
      public void onTimelineChanged(
          Timeline timeline, @Player.TimelineChangeReason int reason) {
        Object manifest = player.getCurrentManifest();
        if (manifest != null) {
          DashManifest dashManifest = (DashManifest) manifest;
          // Do something with the manifest.
        }
      }
    });
```

<br />

## Customizing playback

ExoPlayer provides multiple ways for you to tailor playback experience to your
app's needs. See the [Customization page](https://developer.android.com/guide/topics/media/exoplayer/customization) for examples.