I set up a 3-yo PC with internal SSD and latest Ubuntu. Am running latest Jellyfin in docker. Client is on an iPad mini. Not much traffic on network.

It finds all the titles fine, but when playing back, the sound is often out of sync by 2-5 seconds, and subtitles are off by 10-15 seconds. You can adjust the subtitle offset through trial and error and maybe get them close, but there’s no way to adjust audio sync.

Disabled “Prefer fMP4-HLS Media Container” based on this recommendation: https://github.com/jellyfin/jellyfin/issues/11723

Rebooted and updated all parts. Still didn’t fix the issue.

Any other suggestions? It happens across multiple titles.

  • gccalvin@lemmy.worldEnglish
    2·
    2 days ago

    I believe this typically happens if transcoding is needed and it can be “fixed” by enabling “Always burn in subtitle when transcoding” in the subtitles options.

    • fubarx@lemmy.worldOPEnglish
      1·
      2 days ago

      Thanks, didn’t know about the setting. Also found I could change font size and position of subtitles. One more thing solved.

  • catloaf@lemm.eeEnglish
    2·
    3 days ago

    Does it happen in a browser client? Have you verified that it doesn’t happen if you download a file and play it locally?

    • fubarx@lemmy.worldOPEnglish
      3·
      3 days ago

      Didn’t realize web was an option. Been using iOS client based on this list: https://jellyfin.org/downloads/clients/

      I can access the admin interface via web from a remote Mac. Is that the port I should be hitting or should I open other docker ports? It’s all on local home network.

      • beerclue@lemmy.worldEnglish
        2·
        3 days ago

        You shouldn’t need to open any additional ports. Do you have separate accounts for admin and viewing purposes?

        • fubarx@lemmy.worldOPEnglish
          3·
          3 days ago

          Ooh. Just hit it at the reserved server IP on port 8096. Logged in with the user account and started a movie.

          Voice is synced and subtitles are only a second off. Strange how much off the native iOS player was.

          Thanks for pointing me the right way.

  • theunknownmuncher@lemmy.worldEnglish
    32·
    3 days ago

    Force transcoding and burn in subtitles

    EDIT: explain the downvote? This is the correct solution lol it’s not a problem with your client

    • fubarx@lemmy.worldOPEnglish
      1·
      2 days ago

      Toggled burning on and found could also adjust subtitle size and position. It says it might affect performance, but that machine doesn’t have too many things running on it.

      I also remembered it would get worse as you scrubbed or paused, then played. Hopefully, the burning will help avoid that. Thanks!

      • theunknownmuncher@lemmy.worldEnglish
        1·
        2 days ago

        The performance hit during play and scrubbing is due to need to transcode the video as it burns the subtitles in. If you have hardware acceleration for transcoding configured properly, it shouldn’t be a big impact on modern hardware