Support multiple metadata types in streams

For streams using two different types of metadata, you might need additional configuration setup depending on your player implementation. A stream can contain multiple types of metadata. The IMA SDK adds metadata to the stream to retrieve ad information from the media. For example, SCTE-35 is a common second metadata type.

For apps using Media3 ExoPlayer v1.6 or higher, streams with two metadata types are handled by default.

For apps using an ExoPlayer version lower than v1.6, you must add an additional MetadataRenderer instance to your ExoPlayer implementation. The following example adds a second MetadataRenderer instance to support two metadata types:

RenderersFactory defaultRenderersFactory = new DefaultRenderersFactory(context) {

  @Override
  protected void buildMetadataRenderers(Context context, MetadataOutput output,
      Looper outputLooper, @ExtensionRendererMode int extensionRendererMode,
      ArrayList<Renderer> out) {
    // Add a `MetadataRenderer` for each type of metadata. This example adds 2.
    out.add(new MetadataRenderer(output, outputLooper));
    out.add(new MetadataRenderer(output, outputLooper));
  }
};

new ExoPlayer.Builder()
    .setRenderersFactory(defaultRenderersFactory)
    .setMediaSourceFactory(mediaSourceFactory)
    .build();;