Closed narky0 closed 3 months ago
jellyfin-bot
commented
5 months ago Hi, it seems like your issue report has the following item(s) that need to be addressed:
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ovosimpatico
commented
5 months ago I can reproduce this issue with all transcoded content on my server
saiyogi2k
commented
5 months ago Hey, even i am experiencing sub sync issues on the webplayer. But when i switch to the jellyfin app it is synced properly
kanecko
commented
5 months ago I have had the same issue that has started immediately after updating to the newest server version 10.9.6. A 4K content worked fine via a 4K TV, but not when the same content was watched on a 1080p PC via a browser.
I have now updated the server to 10.9.7 and the subs were not out of sync anymore on this particular content I was watching. However... when I started watching a different content and seeked around, the problem re-occured.
Hattan-BA
commented
5 months ago Having the same issue on version (10.9.6), burning the subtitle works as a temporary fix.
ikheetjeff
commented
4 months ago I have also been experiencing this problem for a few versions now. It has often been linked to an issue that has been around for a while, but I did not have this problem in version 10.8.13. I was still using that version.
For me, this issue occurs on Firefox, not on Chrome; so it's related to transcoding. If I start the stream from the beginning, it works fine, but if I fast forward or try to resume from where I left off, it goes out of sync. All these problems did not occur in version 10.8.13.
Burn-in subtitles do seem to be a temporary fix. However, turning off "prefer fMP4-HLS media containers" under Settings > Playback seems to be the real fix for me.
I compared it with version 10.8.13, and that setting was already off. As far as I know, not by me. Since I unchecked this option, the sync problems on Firefox seem to have improved for me. I will continue to monitor it.
Seems like this problem: https://github.com/jellyfin/jellyfin/issues/10273
lflare
commented
4 months ago I have also been experiencing this problem for a few versions now. It has often been linked to an issue that has been around for a while, but I did not have this problem in version 10.8.13. I was still using that version.
For me, this issue occurs on Firefox, not on Chrome; so it's related to transcoding. If I start the stream from the beginning, it works fine, but if I fast forward or try to resume from where I left off, it goes out of sync. All these problems did not occur in version 10.8.13.
Burn-in subtitles do seem to be a temporary fix. However, turning off "prefer fMP4-HLS media containers" under Settings > Playback seems to be the real fix for me.
I compared it with version 10.8.13, and that setting was already off. As far as I know, not by me. Since I unchecked this option, the sync problems on Firefox seem to have improved for me. I will continue to monitor it.
Seems like this problem: #10273
Does turning off fMP4-HLS permanently fix this issue? It had inconsistent effect for me, and seeking back and forth seems to throw it out of sync again.
Also seems like there's an earlier similar issue #11825.
felix920506
commented
3 months ago Unfortunately this is something that we can't really do much about other than burning in the subs. We are working on adding an option to force burn in subs when transcoding.
lflare
commented
3 months ago Unfortunately this is something that we can't really do much about other than burning in the subs. We are working on adding an option to force burn in subs when transcoding.
Why is that the case? The issue was not present in 10.8, but only in 10.9, surely something broke there?
ikheetjeff
commented
3 months ago Unfortunately this is something that we can't really do much about other than burning in the subs. We are working on adding an option to force burn in subs when transcoding.
Why is that the case? The issue was not present in 10.8, but only in 10.9, surely something broke there?
Yes, this was exactly my thought as well.
Additionally, an update following my earlier response: turning off the fMP4 setting has resolved my issue. Since this setting is client-based, I have modified the web code so that it is turned off by default, as in v10.8. (after v10.9, it is enabled by default)
The only question is whether we are all talking about the same thing, or if there are different kinds of issues.
felix920506
commented
3 months ago It has something to do with fMP4 I know that much. fMP4 got turned on by default because of wider codec support. Without fMP4 we cannot transcode or remux to anything other H264 video with AAC audio.
cstoicescu
commented
3 months ago Had the same problem. I was able to fix it by disabling option in PLAYBACK - > Prefer fMP4-HLS Container
felix920506
commented
3 months ago Duplicate of #2547
ikheetjeff
commented
3 months ago bruh, this is definitely not a duplicate of #2547 thats an issue on v10.5. this issue AFTER v10.8
in my opinion its really clear that fmp4 breaks things with syncing. so or there need a fix/open issue for that, or the feature must be disabled at default.
goodluck
Please describe your bug
I've been having issues with subtitles beeing out of sync, I have tested with several browsers (firefox, Opera, Brave), on the beggining of the stream the subtitles are ok, but if I jump ahead they get out of sync.
Android clients aparently have no issue, but realized there is a difference to the browser tests, on android there is no transcoding happening
Reproduction Steps
Jellyfin Version
10.9.0
if other:
10.9.6
Environment
Jellyfin logs
FFmpeg logs
Please attach any browser or client logs here
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