Two issues are currently known, which causes playback of videos through the Samsung smart TV PLEX app to have offset between sound and image, leading to audio out of sync:
- Very small but gradually increasing offset during playback, which can be temporarily fixed by pausing and resuming the video.
- Significant offset which remains the same through the entire video, with no change from using the method mentioned below.
How to fix it
To fix this sync problem between video and audio in the PLEX app, follow these steps:
- On your TV, open the PLEX app and navigate to:
Preferences -> Player
- Change the three buffer settings from “auto” to:
Initial Buffer: 25MB
Pending Buffer: 50MB
Total Buffer: 75MB
This seems to fix the issue of PLEX audio being out of sync!
Maybe you will have to use other buffer sizes for maintaining sync in higher bitrate videos.
Also, maybe this audio out of sync issue may have been fixed in newer PLEX app versions.
I hope that this could also prove to be a fix for the issue with gradually shifting sound which is normally solved by pausing and resuming playback to resync.
Enjoy, and share if you found this post useful =)