Playback in browser, subtitle is out of sync

[danergo 32]

Hello!

 

I'm trying to watch some movie on an old smart TV which already has browser integrated. (Unfortunately no native Emby is on that)

All the movies are playing nice and smooth, very good!

 

However if I play a movie with subtitles, the browser asks for webvtt. Emby then converts my subtitle on-the-fly to vtt and pass it back to the browser.

Texts are displayed under the movie, but they are delayed by more seconds, so it is not usable.

 

I have compared the vtt file and the original srt, and they are identical (by time-perspective).

 

 

Here are some of the log:

2019-05-13 19:54:55.746 Info HttpServer: HTTP GET http://a.b.c.d:8096/emby/Videos/6178/87afeaa895842dec18af539e0f45efd0/Subtitles/3/0/Stream.vtt. Host=a.b.c.d:8096, Connection=keep-alive, User-Agent=Mozilla/5.0 (Linux; U) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.79 Safari/537.4, Accept=*/*, Referer=http://a.b.c.d:8096/emby/web/index.html, Accept-Encoding=gzip,deflate,sdch, Accept-Language=hu-HU,hu;q=0.8,en-US;q=0.6,en;q=0.4, Accept-Charset=ISO-8859-2,utf-8;q=0.7,*;q=0.3
2019-05-13 19:54:55.767 Info SubtitleEncoder: ProcessRun 'ffmpeg-subtitle_convert' Execute: /opt/emby-server/bin/ffmpeg  -sub_charenc windows-1252 -i "/mediaroot/Ray Donovan (2013)/Season 6/Ray Donovan - 6x08 - Who Once Was Dead.hun.srt" "/embyroot/emby-server/cache/subtitles/b/b451c02c2f0950dff2cd29d05aa4b8af_636925107649591091_3_0_0_False.vtt"
2019-05-13 19:54:55.785 Info SubtitleEncoder: ProcessRun 'ffmpeg-subtitle_convert' Started.
2019-05-13 19:54:56.008 Info SubtitleEncoder: ProcessRun 'ffmpeg-subtitle_convert' Process exited with code 0
2019-05-13 19:54:56.013 Info SubtitleEncoder: ffmpeg subtitle conversion succeeded for /mediaroot/Ray Donovan (2013)/Season 6/Ray Donovan - 6x08 - Who Once Was Dead.hun.srt
2019-05-13 19:54:56.014 Info HttpServer: HTTP Response 200 to w.x.y.z. Time: 268ms. http://a.b.c.d:8096/emby/Videos/6178/87afeaa895842dec18af539e0f45efd0/Subtitles/3/0/Stream.vtt

Do you think there is something that I can try?

(On-the-fly subtitle extraction was enabled, if I disable it is still not working - there was no subtitle then)

 

Thank you!

[Luke 40120]

Hi @@danergo, have you checked the subtitle timings? Are they actually in sync with the video?

[danergo 32]

Subtitle timings are okay. At least I believe so (on every other device and platform it works well).

This particular device has low memory which might cause these symptoms and I wanted to know if there is something I can still try.

 

So to answer: if I change the subtitle timings it would ruin the subs on the other platforms and on other devices.

 

What do you think?

[Luke 40120]

 

 

So to answer: if I change the subtitle timings it would ruin the subs on the other platforms and on other devices.

 

@@danergo

Yes this probably would be a problem. In the future we plan to add subtitle delay settings, but we haven't gotten there just yet. I suppose you could consider two sets of subtitles, although that would be a pain in the neck.

[pwhodges 1857]

Another workaround would be to re-encode with hard subs, using Handbrake, for instance.

[Wondertje 10]

In the future we plan to add subtitle delay settings

 

This made me ridiculously happy, it's something I've been missing since like, forever. Can't wait for that to happen 

[danergo 32]

Yepp, reencoding is one option but in this case I guess transcoding could also work, right? It would unload the stress from the TV and balance it towards the server which is much more powerful.

[Luke 40120]

Possibly. You could try that. Let us know how you get on. Thanks.

[rbjtech 5000]

You could you 'subtitle edit' and create a new subtitle file with suitable delay/advance and then just play that when on this particular device.