Hello There 
,
I’m seeing a very strange issue with Jellyfin. I’ve identified what seems to trigger it, but I don’t understand how to fix it.
I have the series “One Piece” and no episode will start playing, whether through the app or the web UI. There’s no issue in Streamyfin—playback starts immediately.
I tried replacing the files. Whether H.264 or H.265, it makes no difference.
I deleted everything, then re-imported only season 1 and everything worked.
I imported season 2—still fine.
Then I slowly imported the remaining seasons one by one.
After a while, the problem returns. Right now I’ve added 10 seasons (out of 21), and at that point episodes no longer start. Nothing shows up in the logs—nothing happens. It still works perfectly in Streamyfin. I tested with direct stream for everything.
If I force transcoding (lower bitrate and lower resolution), playback eventually starts—but only after a long delay. It’s very odd, especially since I have no issues with anything else on the server.
In short: when the number of files in a series gets large, the media won’t start.
,I’m seeing a very strange issue with Jellyfin. I’ve identified what seems to trigger it, but I don’t understand how to fix it.
I have the series “One Piece” and no episode will start playing, whether through the app or the web UI. There’s no issue in Streamyfin—playback starts immediately.
I tried replacing the files. Whether H.264 or H.265, it makes no difference.
I deleted everything, then re-imported only season 1 and everything worked.
I imported season 2—still fine.
Then I slowly imported the remaining seasons one by one.
After a while, the problem returns. Right now I’ve added 10 seasons (out of 21), and at that point episodes no longer start. Nothing shows up in the logs—nothing happens. It still works perfectly in Streamyfin. I tested with direct stream for everything.
If I force transcoding (lower bitrate and lower resolution), playback eventually starts—but only after a long delay. It’s very odd, especially since I have no issues with anything else on the server.
In short: when the number of files in a series gets large, the media won’t start.