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)