Adding audio / subtitles sync menu in ExoPlayer (adjust audio / subtitles sync functionality)

[MSTRKKRFT]

Describe the feature you'd like

Hello!

I noticed that libVLC player allows adjusting audio & subtitles sync, which is great as depending on the file format I have different audio delays. Sometimes the file will play just fine without sync issue, but with Dolby Vision files, for example, I need to add 350ms delay to get audio in sync.

Because of that (and problems with subtitles in ExoPlayer, as described here : #2374 (comment)), I have to use Kodi as external player if I want to use Jellyfin ATV app, but with that solution watch state tracking is not working, so I would prefer to be able to use ExoPlayer inside jellyfin app.

Is it possible to add this option in ExoPlayer as well ?

[tim-vk]

It's been a while but I'm the guy who added the subtitle sync to the libVLC player and at that time I could not find a plug-and-play method to get subtitle offsets working in exoplayer. See here.

However!

I saw a very interesting conversation here where I maybe oversaw a very simple solution for that. So that's something I can maybe take a look at.

I don't have the slightest idea how the audio sync would work: haven't looked at that.

By the way: Your link is dead. Could you check it?

Edit: Did a quick check. I think getting the subtitle offset to work with external subtitles shouldn't be a problem (just add the buttons & ensure 'getsubtitledelay' returns the correct value). However subtitle offset with internal subtitles would still be an issue (since exoplayer doesn't support offsets).

[MSTRKKRFT]

First, thanks for your work!
I'm not a dev, so I really can't help you on that… But if you need any end-user testing or something, I would be glad to help you.
Just updated the link ! The problem is integrated subs & Dolby Vision aren't playing great together in jellyfin-exoplayer, but no issue with kodi-exoplayer (maven's build from kodinerds)

[zerodogg]

It would be nice if this could get implemented. The lack of audio delay settings in 0.17.x has rendered jellyfin unusable for certain files on my android tv, I’m having to revert to an older version via fdroid.

[jdumeez]

with libVLC removed on the android client, it would be great if this topic is picked up again.
We used the subtitle offset feature all the time

[itsZeebo]

I also think it would be amazing if we could have this feature back.
For some older shows it's impossible to find subtitles that are 100% in sync out of the box so you have to manually fix it on the go.

[M4TH1EU]

Agree with what has been said, this was a really useful feature and now some movies/shows are hard to watch with unsynced subtitles.

[mschumacher69]

Any progress on this?