[10.7-RC2] Can't direct play 2.1 FLAC files on iOS when transcoding #2541

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opened 2026-02-06 22:11:32 +03:00 by OVERLORD · 5 comments
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Originally created by @TheNamelessWonderer on GitHub (Jan 23, 2021).

Describe the bug

Due to https://github.com/jellyfin/jellyfin-web/issues/2249 a fix was implemented in https://github.com/jellyfin/jellyfin/pull/4860. However this fix has caused another issue. If the video is transcoding, it forces it to 2 channels even though it should be able to play 3 channels just fine.

System (please complete the following information):

  • OS: macOS
  • Virtualization: Native
  • Clients: Jellyfin iOS App (iPad Air 2 on 14.3)
  • Browser: Based on Safari
  • Jellyfin Version: 10.7-RC2
  • Playback: Transcode
  • Installed Plugins: Kodi Sync Queue, Playback Reporting. TV Maze, MusicBrainz, OMDb, AudioDB
  • Reverse Proxy: Nginx
  • Base URL: None
  • Networking:Host
  • Storage: NFS

To Reproduce

  1. Enabled fMP4-HLS in the iOS settings and enable burn in subtitles to get the video to transcode.
  2. Play a file with 2.1 FLAC audio
  3. Open playback data and see that it is only 2 channels

Expected behavior

The audio should be 3 channel.

Screenshots

image

Additional Information
I'm not sure if this only happens when transcoding or not. Seeing as the files are H264 High they are always transcoded when played back on my iPad.

Originally created by @TheNamelessWonderer on GitHub (Jan 23, 2021). **Describe the bug** <!-- A clear and concise description of what the bug is. --> Due to https://github.com/jellyfin/jellyfin-web/issues/2249 a fix was implemented in https://github.com/jellyfin/jellyfin/pull/4860. However this fix has caused another issue. If the video is transcoding, it forces it to 2 channels even though it should be able to play 3 channels just fine. **System (please complete the following information):** - OS: macOS - Virtualization: Native - Clients: Jellyfin iOS App (iPad Air 2 on 14.3) - Browser: Based on Safari - Jellyfin Version: 10.7-RC2 - Playback: Transcode - Installed Plugins: Kodi Sync Queue, Playback Reporting. TV Maze, MusicBrainz, OMDb, AudioDB - Reverse Proxy: Nginx - Base URL: None - Networking:Host - Storage: NFS **To Reproduce** <!-- Steps to reproduce the behavior: --> 1. Enabled fMP4-HLS in the iOS settings and enable burn in subtitles to get the video to transcode. 2. Play a file with 2.1 FLAC audio 3. Open playback data and see that it is only 2 channels **Expected behavior** <!-- A clear and concise description of what you expected to happen. --> The audio should be 3 channel. **Screenshots** <!-- If applicable, add screenshots to help explain your problem. --> ![image](https://user-images.githubusercontent.com/56267607/105581548-8350a280-5d87-11eb-96cd-ea939dd446e8.png) **Additional Information** I'm not sure if this only happens when transcoding or not. Seeing as the files are H264 High they are always transcoded when played back on my iPad.
OVERLORD added the bugstale labels 2026-02-06 22:11:32 +03:00
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@TheNamelessWonderer commented on GitHub (Jan 24, 2021):

Just tested 10.7-RC3 and it is still an issue on this build.

@TheNamelessWonderer commented on GitHub (Jan 24, 2021): Just tested 10.7-RC3 and it is still an issue on this build.
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@nyanmisaka commented on GitHub (Jan 24, 2021):

Since the audio track is direct, the 2ch in Transcoding Info can be ignored. This should be a report error.

@nyanmisaka commented on GitHub (Jan 24, 2021): Since the audio track is direct, the 2ch in Transcoding Info can be ignored. This should be a report error.
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@TheNamelessWonderer commented on GitHub (Jan 24, 2021):

Thank you should this one be left open then?

@TheNamelessWonderer commented on GitHub (Jan 24, 2021): Thank you should this one be left open then?
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@stale[bot] commented on GitHub (Jun 2, 2021):

This issue has gone 120 days without comment. To avoid abandoned issues, it will be closed in 21 days if there are no new comments.
If you're the original submitter of this issue, please comment confirming if this issue still affects you in the latest release or nightlies, or close the issue if it has been fixed. If you're another user also affected by this bug, please comment confirming so. Either action will remove the stale label.
This bot exists to prevent issues from becoming stale and forgotten. Jellyfin is always moving forward, and bugs are often fixed as side effects of other changes. We therefore ask that bug report authors remain vigilant about their issues to ensure they are closed if fixed, or re-confirmed - perhaps with fresh logs or reproduction examples - regularly. If you have any questions you can reach us on Matrix or Social Media.

@stale[bot] commented on GitHub (Jun 2, 2021): This issue has gone 120 days without comment. To avoid abandoned issues, it will be closed in 21 days if there are no new comments. If you're the original submitter of this issue, please comment confirming if this issue still affects you in the latest release or nightlies, or close the issue if it has been fixed. If you're another user also affected by this bug, please comment confirming so. Either action will remove the stale label. This bot exists to prevent issues from becoming stale and forgotten. Jellyfin is always moving forward, and bugs are often fixed as side effects of other changes. We therefore ask that bug report authors remain vigilant about their issues to ensure they are closed if fixed, or re-confirmed - perhaps with fresh logs or reproduction examples - regularly. If you have any questions you can reach us on [Matrix or Social Media](https://docs.jellyfin.org/general/getting-help.html).
Author
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@TheNamelessWonderer commented on GitHub (Jun 29, 2021):

Was this fixed?

@TheNamelessWonderer commented on GitHub (Jun 29, 2021): Was this fixed?
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Reference: starred/jellyfin#2541