Unexpected AudioSink Discontinuity When Playing Playlist of AAC Streams (API 29–33)

Version

Media3 1.7.1 (same as 1.6.1)

More version details

No response

Devices that reproduce the issue

Pixel Emulator with API 29-33(I haven't tested the versions below 29)

Devices that do not reproduce the issue

Pixel Emulator with API 34-36.
Pixel 8a API 36

Reproducible in the demo app?

Yes

Reproduction steps

Code to reproduce the issue:
val mediaItem1 = MediaItem.fromUri("https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview126/v4/4f/da/0a/4fda0aca-36db-1d70-51cd-b6aaacf19f01/mzaf_9268020244751132113.plus.aac.p.m4a")
val mediaItem2 = MediaItem.fromUri("https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview112/v4/1e/54/e2/1e54e21a-fc47-cdc3-5f0c-ade9585dbe1c/mzaf_4819330222587737830.plus.aac.p.m4a")
val mediaItem3 = MediaItem.fromUri("https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview125/v4/f4/a1/c2/f4a1c207-6d73-e3bd-8fcb-bd6c5037021a/mzaf_16212608709217830172.plus.aac.p.m4a")
val mediaItem4 = MediaItem.fromUri("https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview125/v4/52/f1/bb/52f1bb30-6fed-ffec-722c-d94ffef04fe6/mzaf_1999342271217657721.plus.aac.p.m4a")
val mediaItem5 = MediaItem.fromUri("https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview126/v4/85/70/ea/8570ea1d-2fd3-a367-a5d2-3590a8cdb0ec/mzaf_8612057083017596738.plus.aac.p.m4a")
val mediaItem6 = MediaItem.fromUri("https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview115/v4/c6/ea/1d/c6ea1db3-39a0-7388-1ad4-b069057562b1/mzaf_861639926040474239.plus.aac.p.m4a")
val mediaItem7 = MediaItem.fromUri("https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview125/v4/aa/a1/94/aaa194f9-9568-a6b8-1ee0-c231eab9412a/mzaf_2739203206537586158.plus.aac.p.m4a")

val mediaItems = listOf(mediaItem1, mediaItem2, mediaItem3, mediaItem4, mediaItem5, mediaItem6, mediaItem7)

mediaPlayer?.setMediaItems(mediaItems)
mediaPlayer?.prepare()
mediaPlayer?.play()

Expected result

Playing all songs in order without any issues

Actual result

When playing a list of AAC .m4a preview files from iTunes using ExoPlayer, I encounter an AudioSink$UnexpectedDiscontinuityException. This always happens somewhere in the middle of the playlist. If I play the same files individually (one-by-one, not in a list), there’s no issue.
The error happens even if the files are fully downloaded and cached locally before playback.
E/AudioSink: Audio sink error
androidx.media3.exoplayer.audio.AudioSink$UnexpectedDiscontinuityException:
Unexpected audio track timestamp discontinuity: expected 1000121278420, got 1000121487400
at androidx.media3.exoplayer.audio.DefaultAudioSink.handleBuffer(DefaultAudioSink.java:1016)
at androidx.media3.exoplayer.audio.MediaCodecAudioRenderer.processOutputBuffer(MediaCodecAudioRenderer.java:830)
...

Media

https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview126/v4/4f/da/0a/4fda0aca-36db-1d70-51cd-b6aaacf19f01/mzaf_9268020244751132113.plus.aac.p.m4a
https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview112/v4/1e/54/e2/1e54e21a-fc47-cdc3-5f0c-ade9585dbe1c/mzaf_4819330222587737830.plus.aac.p.m4a
https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview125/v4/f4/a1/c2/f4a1c207-6d73-e3bd-8fcb-bd6c5037021a/mzaf_16212608709217830172.plus.aac.p.m4a
https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview125/v4/52/f1/bb/52f1bb30-6fed-ffec-722c-d94ffef04fe6/mzaf_1999342271217657721.plus.aac.p.m4a
https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview126/v4/85/70/ea/8570ea1d-2fd3-a367-a5d2-3590a8cdb0ec/mzaf_8612057083017596738.plus.aac.p.m4a
https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview115/v4/c6/ea/1d/c6ea1db3-39a0-7388-1ad4-b069057562b1/mzaf_861639926040474239.plus.aac.p.m4a
https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview125/v4/aa/a1/94/aaa194f9-9568-a6b8-1ee0-c231eab9412a/mzaf_2739203206537586158.plus.aac.p.m4a

Bug Report

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