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[HLS] Error mediaError bufferAppendError #173

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opened 2026-04-24 23:00:03 +02:00 by adam · 6 comments
adam commented 2026-04-24 23:00:03 +02:00
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Originally created by @JKamsker on GitHub (Jan 11, 2022).

Playing and scrubbing throught my library (Primarly 15h+ each), the player suddendly looses it by echoing [HLS] Error mediaError bufferAppendError over and over and spamming the network stack with output-n.ts get-requests.

How to reproduce:

  1. Play large-ab1
  2. Dont wait for the conversion to finish, just skip over to large-ab-2

Skipping over large chunks can produce this issue aswell.

image

image

192.168.8.2-1641857888454.log

Originally created by @JKamsker on GitHub (Jan 11, 2022). Playing and scrubbing throught my library (Primarly 15h+ each), the player suddendly looses it by echoing ``[HLS] Error mediaError bufferAppendError`` over and over and spamming the network stack with output-n.ts get-requests. How to reproduce: 1. Play large-ab1 2. Dont wait for the conversion to finish, just skip over to large-ab-2 Skipping over large chunks can produce this issue aswell. ![image](https://user-images.githubusercontent.com/11245306/148856161-ccd3be8d-dd8a-49a8-b405-d3bcc5f0d0ec.png) ![image](https://user-images.githubusercontent.com/11245306/148856073-e8e61396-762e-48b2-a5c4-2a2b752b8e7a.png) [192.168.8.2-1641857888454.log](https://github.com/advplyr/audiobookshelf/files/7842561/192.168.8.2-1641857888454.log)
adam closed this issue 2026-04-24 23:00:04 +02:00
adam commented 2026-04-24 23:00:05 +02:00
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@JKamsker commented on GitHub (Jan 11, 2022):

Found an audiobook where it never works: "Alle diese Welten
Bobiverse 3"

image

Serverlogs:

[2022-01-10T23:40:40.702Z]  INFO: Stream Opened for client root for audiobook Alle diese Welten with streamId str_88t7m54mj29b07owv5
[2022-01-10T23:40:40.751Z]  INFO: [INFO] FFMPEG transcoding started with command: ffmpeg -seek_timestamp 1 -f concat -safe 0 -i /metadata/streams/str_88t7m54mj29b07owv5/files.txt -y -loglevel error -map 0:a -c:a copy -f hls -copyts -avoid_negative_ts make_non_negative -max_delay 5000000 -max_muxing_queue_size 2048 -hls_time 6 -hls_segment_type mpegts -start_number 0 -hls_playlist_type vod -hls_list_size 0 -hls_allow_cache 0 -hls_segment_filename /metadata/streams/str_88t7m54mj29b07owv5/output-%d.ts /metadata/streams/str_88t7m54mj29b07owv5/final-output.m3u8
[2022-01-10T23:40:40.754Z]  INFO: 
[2022-01-10T23:40:41.017Z]  INFO: [aac @ 0x7f475b10dac0] Reserved bit set.
[2022-01-10T23:40:41.020Z]  INFO: [aac @ 0x7f475b10dac0] Prediction is not allowed in AAC-LC.
[2022-01-10T23:40:41.022Z]  INFO: [aac @ 0x7f475b0f6b00] Reserved bit set.
[2022-01-10T23:40:41.024Z]  INFO: [aac @ 0x7f475b0f6b00] Prediction is not allowed in AAC-LC.
[2022-01-10T23:40:41.207Z] ERROR: [StreamManager] streamSync: Stream id mismatch on stream update null str_88t7m54mj29b07owv5
[2022-01-10T23:40:42.758Z]  INFO: [STREAM] str_88t7m54mj29b07owv5 notifying client that stream is ready
[2022-01-10T23:40:42.764Z]  INFO: [STREAM-CHECK] Check Files 188 of 5294 3.55% Furthest Segment: 187
[2022-01-10T23:40:44.762Z]  INFO: [STREAM-CHECK] Check Files 402 of 5294 7.59% Furthest Segment: 401
[2022-01-10T23:40:46.762Z]  INFO: [STREAM-CHECK] Check Files 617 of 5294 11.65% Furthest Segment: 616
[2022-01-10T23:40:48.765Z]  INFO: [STREAM-CHECK] Check Files 834 of 5294 15.75% Furthest Segment: 833
[2022-01-10T23:40:50.769Z]  INFO: [STREAM-CHECK] Check Files 1054 of 5294 19.91% Furthest Segment: 1053
[2022-01-10T23:40:52.777Z]  INFO: [STREAM-CHECK] Check Files 1269 of 5294 23.97% Furthest Segment: 1268
[2022-01-10T23:40:54.773Z]  INFO: [STREAM-CHECK] Check Files 1485 of 5294 28.05% Furthest Segment: 1484
[2022-01-10T23:40:56.775Z]  INFO: [STREAM-CHECK] Check Files 1687 of 5294 31.87% Furthest Segment: 1686
[2022-01-10T23:40:58.779Z]  INFO: [STREAM-CHECK] Check Files 1895 of 5294 35.80% Furthest Segment: 1894
@JKamsker commented on GitHub (Jan 11, 2022): Found an audiobook where it never works: "Alle diese Welten Bobiverse 3" ![image](https://user-images.githubusercontent.com/11245306/148857127-169e11c6-c7e3-463b-a745-b0e88b9e3adb.png) Serverlogs: ```` [2022-01-10T23:40:40.702Z] INFO: Stream Opened for client root for audiobook Alle diese Welten with streamId str_88t7m54mj29b07owv5 [2022-01-10T23:40:40.751Z] INFO: [INFO] FFMPEG transcoding started with command: ffmpeg -seek_timestamp 1 -f concat -safe 0 -i /metadata/streams/str_88t7m54mj29b07owv5/files.txt -y -loglevel error -map 0:a -c:a copy -f hls -copyts -avoid_negative_ts make_non_negative -max_delay 5000000 -max_muxing_queue_size 2048 -hls_time 6 -hls_segment_type mpegts -start_number 0 -hls_playlist_type vod -hls_list_size 0 -hls_allow_cache 0 -hls_segment_filename /metadata/streams/str_88t7m54mj29b07owv5/output-%d.ts /metadata/streams/str_88t7m54mj29b07owv5/final-output.m3u8 [2022-01-10T23:40:40.754Z] INFO: [2022-01-10T23:40:41.017Z] INFO: [aac @ 0x7f475b10dac0] Reserved bit set. [2022-01-10T23:40:41.020Z] INFO: [aac @ 0x7f475b10dac0] Prediction is not allowed in AAC-LC. [2022-01-10T23:40:41.022Z] INFO: [aac @ 0x7f475b0f6b00] Reserved bit set. [2022-01-10T23:40:41.024Z] INFO: [aac @ 0x7f475b0f6b00] Prediction is not allowed in AAC-LC. [2022-01-10T23:40:41.207Z] ERROR: [StreamManager] streamSync: Stream id mismatch on stream update null str_88t7m54mj29b07owv5 [2022-01-10T23:40:42.758Z] INFO: [STREAM] str_88t7m54mj29b07owv5 notifying client that stream is ready [2022-01-10T23:40:42.764Z] INFO: [STREAM-CHECK] Check Files 188 of 5294 3.55% Furthest Segment: 187 [2022-01-10T23:40:44.762Z] INFO: [STREAM-CHECK] Check Files 402 of 5294 7.59% Furthest Segment: 401 [2022-01-10T23:40:46.762Z] INFO: [STREAM-CHECK] Check Files 617 of 5294 11.65% Furthest Segment: 616 [2022-01-10T23:40:48.765Z] INFO: [STREAM-CHECK] Check Files 834 of 5294 15.75% Furthest Segment: 833 [2022-01-10T23:40:50.769Z] INFO: [STREAM-CHECK] Check Files 1054 of 5294 19.91% Furthest Segment: 1053 [2022-01-10T23:40:52.777Z] INFO: [STREAM-CHECK] Check Files 1269 of 5294 23.97% Furthest Segment: 1268 [2022-01-10T23:40:54.773Z] INFO: [STREAM-CHECK] Check Files 1485 of 5294 28.05% Furthest Segment: 1484 [2022-01-10T23:40:56.775Z] INFO: [STREAM-CHECK] Check Files 1687 of 5294 31.87% Furthest Segment: 1686 [2022-01-10T23:40:58.779Z] INFO: [STREAM-CHECK] Check Files 1895 of 5294 35.80% Furthest Segment: 1894 ````
adam commented 2026-04-24 23:00:07 +02:00
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@JKamsker commented on GitHub (Jan 12, 2022):

Related: https://github.com/Mbucari/AAXClean/issues/8

Kinda found out why this error occurs: FFMPEG doesnt like most audiobooks produced by this library

@JKamsker commented on GitHub (Jan 12, 2022): Related: https://github.com/Mbucari/AAXClean/issues/8 Kinda found out why this error occurs: FFMPEG doesnt like most audiobooks produced by this library
adam commented 2026-04-24 23:00:07 +02:00
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@advplyr commented on GitHub (Jan 13, 2022):

Does the other audiobook eventually start playing? Or does the next audiobook never play?

@advplyr commented on GitHub (Jan 13, 2022): Does the other audiobook eventually start playing? Or does the next audiobook never play?
adam commented 2026-04-24 23:00:08 +02:00
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@JKamsker commented on GitHub (Jan 13, 2022):

No. Its gone after that.
Reloading the site does solve the issue usually

@JKamsker commented on GitHub (Jan 13, 2022): No. Its gone after that. Reloading the site does solve the issue usually
adam commented 2026-04-24 23:00:08 +02:00
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@advplyr commented on GitHub (Jan 13, 2022):

This is only with some audiobooks or with all of them?
So you can only change audiobooks by closing the current stream?

@advplyr commented on GitHub (Jan 13, 2022): This is only with some audiobooks or with all of them? So you can only change audiobooks by closing the current stream?
adam commented 2026-04-24 23:00:08 +02:00
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@JKamsker commented on GitHub (Jan 16, 2022):

Sorry just returned from a vacation.
I accidently deleted the old audiobooks and now using a different decoder for my other project which produces the m4b's. Now it seems to work.

Ill close it for now and reopen if the error reoccurs.

@JKamsker commented on GitHub (Jan 16, 2022): Sorry just returned from a vacation. I accidently deleted the old audiobooks and now using a different decoder for my other project which produces the m4b's. Now it seems to work. Ill close it for now and reopen if the error reoccurs.
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Reference: starred/audiobookshelf#173
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