Movie audio track out of sync only in Emby

[tsunami1701 6]

Hi there,

I have a movie with 2 audio tracks: italian and english.

The italian track is out of sync but only when the movie is played in Emby; I tried to play the movie with VLC and other players and the track is on sync.

Thanks!

Davide

 

These are the movie data:

 

These are the stats for nerds for the italian track

 

These are the nerd stats for the english track

 

 

 

 

[Luke 42081]

 

Hi there, let's look at an example. Please attach the information requested in how to report a media playback issue. Thanks!

 

[tsunami1701 6]

Hi there,

here is the server log

I've started to play the movie with the italian track (the one out of sync) on 2024-01-22 19:23 for about 3 minutes, then I've played the same movie from the beginning with the english track for 3 minutes and then again 3 minutes from the beginning with italian track and 3 minutes with the english track.

I attach even the direct stream log but this is generated only when i play the movie with the english track.

Thanks!

 

embyserver.txtffmpeg-directstream-00a7e09e-1c5d-4c22-807d-669c11b86f77_1.txtffmpeg-directstream-00a7e09e-1c5d-4c22-807d-669c11b86f77_12.txt

[Luke 42081]

Are you able to try Edge and see how that compares?

[visproduction 315]

ffmpeg log shows on 44 Mhz aac codec English uses Timebase 1/48000, but the Italian audio is encoded at 48 Mhz aac and uses ffmpeg Timebase 1/90000.  
See: https://stackoverflow.com/questions/43333542/what-is-video-timescale-timebase-or-timestamp-in-ffmpeg/

This ffmpeg auto settings, different for 44.1Mhz vs. 48MHz audio, might be the cause of the sync issue after ffmpeg encoding.

 

Edited January 22, 2024 by visproduction