
Allowing duplicate groups caused some other code working with the array to use reference equality comparison. This is error-prone, easily forgotten (e.g. when using the TrackGroups in a map) and causes bugs when TrackGroups are serialized to disk or to another process. All TrackGroups created by ExoPlayer are already unique and custom code creating TrackGroupArrays with identical groups can easily distringuish them by adding an id to each group. Issue: google/ExoPlayer#9718 PiperOrigin-RevId: 413617005
ExoPlayer library
The ExoPlayer library is split into multiple modules. See ExoPlayer's top level README for more information about the available library modules and how to use them.