1.5.0-rc01

This release includes the following changes since the 1.5.0-beta01 release:

• ExoPlayer:
  • Add a setter to SntpClient to set the max elapsed time since the last update after which the client is re-initialized (#1794).
  • Consider language when selecting a video track. By default select a 'main' video track that matches the language of the selected audio track, if available. Explicit video language preferences can be expressed with TrackSelectionParameters.Builder.setPreferredVideoLanguage(s)`.
  • Add selectedAudioLanguage parameter to DefaultTrackSelector.selectVideoTrack() method.
  • Add retryCount parameter to MediaSourceEventListener.onLoadStarted
    and corresponding MediaSourceEventListener.EventDispatcher methods.
  • Fix bug where playlist items or periods in multi-period DASH streams with durations that don't match the actual content could cause frame freezes at the end of the item (#1698).
• Transformer:
  • Update parameters of VideoFrameProcessor.registerInputStream and VideoFrameProcessor.Listener.onInputStreamRegistered to use Format.
• Extractors:
  • Fix media duration parsing in mdhd box of MP4 files to handle -1 values (#1819).
  • Add support for identifying h263 box in MP4 files for H.263 video (#1821).
• DataSource:
  • DataSourceContractTest: Assert that DataSource.getUri() returns the resolved URI (as documented). Where this is different to the requested URI, tests can indicate this using the new DataSourceContractTest.TestResource.Builder.setResolvedUri() method.
  • DataSourceContractTest: Assert that DataSource.getUri() and getResponseHeaders() return their 'open' value after a failed call to open() (due to a 'not found' resource) and before a subsequent close() call.
    • Overriding DataSourceContractTest.getNotFoundResources() allows test sub-classes to provide multiple 'not found' resources, and to provide any expected headers too. This allows to distinguish between HTTP 404 (with headers) and "server not found" (no headers).
• Text:
  • Fix CEA-608 subtitles in H.264 MPEG-TS streams not being output (this was broken in 1.5.0-alpha01 by 03a205f).
  • Support CEA-608 subtitles in Dolby Vision content (#1820).
• RTSP Extension:
  • Fix crashing when parsing of RTP packets with header extensions (#1225).