f36ab87b38
This is similar to the HLS fix in 770ca66fbc
Similar to HLS, the original problem here was **not** modifying the
`Format` for caption tracks
embedded into the video stream. I tried just updating the format in
both places, but that caused new failures because the new
('transcoded') format was then fed into `FragmentedMp4Extractor` as
part of `closedCaptionFormats`, which resulted in the CEA-608 data
being emitted from `FragmentedMp4Extractor` with the incorrect
`application/x-media3-cues` MIME type (but the bytes were actually
CEA-608), meaning the transcoding wrapper passed it through without
transcoding and decoding failed (because obviously CEA-608 bytes can't
be decoded by `CueDecoder` which is expecting a `Bundle` from
`CuesWithTiming.toBundle`.
To resolve this we keep track of the 'original' caption formats inside
`TrackGroupInfo`, so we can feed them into `FragmentedMp4Extractor`.
For all other usages in `DashMediaPeriod` we use the 'transcoded'
caption formats.
PiperOrigin-RevId: 592866262
ExoPlayer DASH module
Provides support for Dynamic Adaptive Streaming over HTTP (DASH) content in ExoPlayer.
Getting the module
The easiest way to get the module is to add it as a gradle dependency:
implementation 'androidx.media3:media3-exoplayer-dash:1.X.X'
where 1.X.X is the version, which must match the version of the other media
modules being used.
Alternatively, you can clone this GitHub project and depend on the module locally. Instructions for doing this can be found in the top level README.
Using the module
Adding a dependency to this module is all that's required to enable playback of
DASH media items added to ExoPlayer in its default configuration. Internally,
DefaultMediaSourceFactory will automatically detect the presence of the module
and convert a DASH MediaItem into a DashMediaSource for playback.
Similarly, a DownloadManager in its default configuration will use
DefaultDownloaderFactory, which will automatically detect the presence of
the module and build DashDownloader instances to download DASH content.
For advanced playback use cases, applications can build DashMediaSource
instances and pass them directly to the player. For advanced download use cases,
DashDownloader can be used directly.