• Common library:
  • Add Format.primaryTrackGroupId to identify the primary group of embedded Format instances (#294).
• ExoPlayer:
  • Fix issue where ExoPlayer would not request delayed audio focus when playback is requested during phone calls.
  • Fix bug where transitions from on-demand to live content may cause re-buffers at the end of the on-demand content (#3052).
  • Add support for Dolby Vision Profile 10 (#2830).
• Track selection:
  • Change signature of DefaultTrackSelector.selectAllTracks to include the output array as a parameter, pre-populated with track overrides.
  • Fix issue where embedded metadata tracks are selected irrespective of whether the corresponding primary track is selected (#294).
  • Stabilize TrackSelectionParameters options for preferredVideoLanguages, preferredVideoLabels, preferredAudioLabels, preferredTextLabels and selectTextByDefault.
• Extractors:
  • MP4: Support files with large uuid boxes before other boxes like moov (#3046).
  • MP4: Add support for Versatile Video Coding (VVC) tracks in MP4 containers.
• Audio:
  • Improve the retry logic of AudioOutput initialization in DefaultAudioSink (#2905).
  • Attempt to match the output layout of the speakers (or Spatializer if applicable) when decoding IAMF, both with the IAMF extension and media codec decoders, supported by new fields and logic in AudioCapabilities and AudioCapabilitiesReceiver.
• Metadata:
  • Increase default count of metadata renderers to four to cover all potential metadata tracks published by HLS variants and renditions (#3043).
• Session:
  • Fix issue where system UI button placement workaround negatively affects other UI surface like Android Auto or manufacturers not needing the workaround (#3041).
  • Fix issue where access to subscriptions was not synchronized (#3056).
• UI:
  • Add Player Composable to media3-ui-compose-material3 which combines a ContentFrame with customizable controls aligned to top, center, and bottom.
• HLS extension:
  • Expose ID3 (EMSG) metadata track in audio renditions (#3043).
  • Allow location fallback upon encountering load errors, if redundant streams from different locations are available (#1988).
  • Fix X-SNAP behaviour for HLS interstitials to correctly calculate start and resumption position (#3013).
• DASH extension:
  • Fix issue where tracks with unaligned segment start times cause delays or missed samples at the beginning of playback (#3057).
  • Fix bug where timestamps of inband EMSG v0 metadata are not set correctly (#3024).
• Decoder extensions (FFmpeg, VP9, AV1, etc.):
  • Add MPEG-H UI manager support to the MPEG-H decoder extension (#3066).
• Remove deprecated symbols:
  • Remove androidx.media3.extractor.metadata.flac.VorbisComment. Use androidx.media3.extractor.metadata.vorbis.VorbisComment instead.
  • Remove MediaSource.prepareSource(MediaSourceCaller, TransferListener). Use MediaSource.prepareSource(MediaSourceCaller, TransferListener, PlayerId) instead.