Subtitle parsing broken in 1.4.0-alpha02+

Version

Media3 main branch

More version details

Subtitle parsing for a given DASH asset (DRM protected) works fine in 1.4.0-alpha01 but in 1.4.0-alpha02 and 1.4.0-beta01 the playback fails with the following exception. Without provding the asset, can you help figure this out? Any info from the DASH manifest that I could provide to help? Again, same asset plays fine and displays subtitles in 1.4.0-alpha01

androidx.media3.exoplayer.ExoPlaybackException: Source error
      at androidx.media3.exoplayer.ExoPlayerImplInternal.handleIoException(ExoPlayerImplInternal.java:741)
      at androidx.media3.exoplayer.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:711)
      at android.os.Handler.dispatchMessage(Handler.java:102)
      at android.os.Looper.loop(Looper.java:223)
      at android.os.HandlerThread.run(HandlerThread.java:67)
  Caused by: androidx.media3.common.ParserException: SubtitleParser failed.{contentIsMalformed=true, dataType=1}
      at androidx.media3.extractor.text.SubtitleExtractor.parseAndWriteToOutput(SubtitleExtractor.java:258)
      at androidx.media3.extractor.text.SubtitleExtractor.read(SubtitleExtractor.java:161)
      at androidx.media3.exoplayer.source.chunk.BundledChunkExtractor.read(BundledChunkExtractor.java:241)
      at androidx.media3.exoplayer.source.chunk.ContainerMediaChunk.load(ContainerMediaChunk.java:132)
      at androidx.media3.exoplayer.upstream.Loader$LoadTask.run(Loader.java:421)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
      at java.lang.Thread.run(Thread.java:923)
  Caused by: java.lang.IllegalArgumentException
      at androidx.media3.common.util.Assertions.checkArgument(Assertions.java:40)
      at androidx.media3.extractor.text.webvtt.WebvttSubtitle.getEventTime(WebvttSubtitle.java:63)
      at androidx.media3.extractor.text.LegacySubtitleUtil.toCuesWithTiming(LegacySubtitleUtil.java:44)
      at androidx.media3.extractor.text.webvtt.WebvttParser.parse(WebvttParser.java:108)
      at androidx.media3.extractor.text.SubtitleParser.parse(SubtitleParser.java:152)
      at androidx.media3.extractor.text.SubtitleExtractor.parseAndWriteToOutput(SubtitleExtractor.java:238)
      at androidx.media3.extractor.text.SubtitleExtractor.read(SubtitleExtractor.java:161) 
      at androidx.media3.exoplayer.source.chunk.BundledChunkExtractor.read(BundledChunkExtractor.java:241) 
      at androidx.media3.exoplayer.source.chunk.ContainerMediaChunk.load(ContainerMediaChunk.java:132) 
      at androidx.media3.exoplayer.upstream.Loader$LoadTask.run(Loader.java:421) 
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
      at java.lang.Thread.run(Thread.java:923) 

Devices that reproduce the issue

Nvidia Shield TV
Pixel 7 Pro

Devices that do not reproduce the issue

None known

Reproducible in the demo app?

Yes

Reproduction steps

player.trackSelectionParameters =
  player.trackSelectionParameters.buildUpon()
    .setTrackTypeDisabled(TRACK_TYPE_TEXT, !showSubtitles)
    .setPreferredTextLanguage("eng")
    .build()

Expected result

Playback succeeds even when displaying subtitles

Actual result

Receive ERROR_CODE_PARSING_CONTAINER_MALFORMED 3001 during playback when attempting to display subtitles

Media

Private URL. Please let me know if there is some info I can provide from the DASH manifest

Bug Report

• You will email the zip file produced by adb bugreport to android-media-github@google.com after filing this issue.