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[Bug]: Playhead won't drag for a book #1132

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opened 2026-04-24 23:50:28 +02:00 by adam · 3 comments
adam commented 2026-04-24 23:50:28 +02:00
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Originally created by @mdeeter on GitHub (Jan 23, 2025).

What was the Problem?

I have a book with MP3s that won't let me move the playhead to scroll ahead. I converted the book to M4B and the problem seemed to go away with the new version.

On of the users of my server submitted a TestFlight bug report on it, so I figured I might as well post the issue here too.

Other books seem to work fine. Not sure if you want any of the files of the book to use for testing.

https://github.com/user-attachments/assets/034a40cd-6c6d-4d39-a7b9-42c52a736b2c

Steps to Reproduce the Issue

Can provide the book files at the developer's request.

What was Expected?

Playhead should be dragable.

Phone Model

iPhone 16

Phone OS

iOS 18.2.1

Audiobookshelf App Version

iOS App - 0.9.78

Installation Source

Testflight

Additional Notes

No response

Originally created by @mdeeter on GitHub (Jan 23, 2025). ### What was the Problem? I have a book with MP3s that won't let me move the playhead to scroll ahead. I converted the book to M4B and the problem seemed to go away with the new version. On of the users of my server submitted a TestFlight bug report on it, so I figured I might as well post the issue here too. Other books seem to work fine. Not sure if you want any of the files of the book to use for testing. https://github.com/user-attachments/assets/034a40cd-6c6d-4d39-a7b9-42c52a736b2c ### Steps to Reproduce the Issue Can provide the book files at the developer's request. ### What was Expected? Playhead should be dragable. ### Phone Model iPhone 16 ### Phone OS iOS 18.2.1 ### Audiobookshelf App Version iOS App - 0.9.78 ### Installation Source Testflight ### Additional Notes _No response_
adam added the bug label 2026-04-24 23:50:28 +02:00
adam closed this issue 2026-04-24 23:50:29 +02:00
adam commented 2026-04-24 23:50:30 +02:00
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@nichwall commented on GitHub (Jan 26, 2025):

Is this the only book of multiple MP3 files that the issue occurs with? If so, this may be an issue with the MP3 files as encoding to M4B fixed it. Another test would be is to encode each of the files to MP3 again (just force it to encode the file again) and replace each of the tracks to see if seeking begins working after that.

Does it work when the book is downloaded instead of streaming? Have you been able to test this book in the web client to see if it can seek there?

@nichwall commented on GitHub (Jan 26, 2025): Is this the only book of multiple MP3 files that the issue occurs with? If so, this may be an issue with the MP3 files as encoding to M4B fixed it. Another test would be is to encode each of the files to MP3 again (just force it to encode the file again) and replace each of the tracks to see if seeking begins working after that. Does it work when the book is downloaded instead of streaming? Have you been able to test this book in the web client to see if it can seek there?
adam commented 2026-04-24 23:50:31 +02:00
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@mdeeter commented on GitHub (Feb 1, 2025):

The issue happens on iOS streaming or when downloaded.

The book structure is:
Image

ffmpeg probe data is:

{
  "streams": [
    {
      "index": 0,
      "codec_name": "mp3",
      "codec_long_name": "MP3 (MPEG audio layer 3)",
      "codec_type": "audio",
      "codec_tag_string": "[0][0][0][0]",
      "codec_tag": "0x0000",
      "sample_fmt": "fltp",
      "sample_rate": "44100",
      "channels": 2,
      "channel_layout": "stereo",
      "bits_per_sample": 0,
      "initial_padding": 0,
      "r_frame_rate": "0/0",
      "avg_frame_rate": "0/0",
      "time_base": "1/14112000",
      "start_pts": 353600,
      "start_time": "0.025057",
      "duration_ts": 58406993442,
      "duration": "4138.817563",
      "bit_rate": "128000",
      "disposition": {
        "default": 0,
        "dub": 0,
        "original": 0,
        "comment": 0,
        "lyrics": 0,
        "karaoke": 0,
        "forced": 0,
        "hearing_impaired": 0,
        "visual_impaired": 0,
        "clean_effects": 0,
        "attached_pic": 0,
        "timed_thumbnails": 0,
        "captions": 0,
        "descriptions": 0,
        "metadata": 0,
        "dependent": 0,
        "still_image": 0
      },
      "tags": {
        "encoder": "LAME3.96r"
      }
    }
  ],
  "format": {
    "filename": "/files/watch/7 - Harry Potter And The Deathly Hallows/CD01.mp3",
    "nb_streams": 1,
    "nb_programs": 0,
    "format_name": "mp3",
    "format_long_name": "MP2/3 (MPEG audio layer 2/3)",
    "start_time": "0.025057",
    "duration": "4138.817563",
    "size": "66221771",
    "bit_rate": "128001",
    "probe_score": 51,
    "tags": {
      "title": "CD01",
      "artist": "Deathly Hallows",
      "comment": "",
      "encoded_by": "MergeMP3 by The Shchuka's Place"
    }
  }
}

If a dev wants any of the files from the book, I'm willing to share them.

Feel free to close this if you want... just opened this bug in case someone felt that it was worth investigating futher.

@mdeeter commented on GitHub (Feb 1, 2025): The issue happens on iOS streaming or when downloaded. The book structure is: ![Image](https://github.com/user-attachments/assets/4d46a328-9175-4dc9-9c3d-810cba4d7b61) ffmpeg probe data is: ``` { "streams": [ { "index": 0, "codec_name": "mp3", "codec_long_name": "MP3 (MPEG audio layer 3)", "codec_type": "audio", "codec_tag_string": "[0][0][0][0]", "codec_tag": "0x0000", "sample_fmt": "fltp", "sample_rate": "44100", "channels": 2, "channel_layout": "stereo", "bits_per_sample": 0, "initial_padding": 0, "r_frame_rate": "0/0", "avg_frame_rate": "0/0", "time_base": "1/14112000", "start_pts": 353600, "start_time": "0.025057", "duration_ts": 58406993442, "duration": "4138.817563", "bit_rate": "128000", "disposition": { "default": 0, "dub": 0, "original": 0, "comment": 0, "lyrics": 0, "karaoke": 0, "forced": 0, "hearing_impaired": 0, "visual_impaired": 0, "clean_effects": 0, "attached_pic": 0, "timed_thumbnails": 0, "captions": 0, "descriptions": 0, "metadata": 0, "dependent": 0, "still_image": 0 }, "tags": { "encoder": "LAME3.96r" } } ], "format": { "filename": "/files/watch/7 - Harry Potter And The Deathly Hallows/CD01.mp3", "nb_streams": 1, "nb_programs": 0, "format_name": "mp3", "format_long_name": "MP2/3 (MPEG audio layer 2/3)", "start_time": "0.025057", "duration": "4138.817563", "size": "66221771", "bit_rate": "128001", "probe_score": 51, "tags": { "title": "CD01", "artist": "Deathly Hallows", "comment": "", "encoded_by": "MergeMP3 by The Shchuka's Place" } } } ``` If a dev wants any of the files from the book, I'm willing to share them. Feel free to close this if you want... just opened this bug in case someone felt that it was worth investigating futher.
adam commented 2026-04-24 23:50:31 +02:00
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@nichwall commented on GitHub (Feb 1, 2025):

Does the issue occur with the web client or only with the iOS app?

@nichwall commented on GitHub (Feb 1, 2025): Does the issue occur with the web client or only with the iOS app?
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Reference: starred/audiobookshelf-app#1132