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Hello,
A few months ago, I had the issue where a TrueHD track would not play correctly on the Shield. So, I downgraded to an earlier version and everything has been working well since.
Today I had to delete and reinstall Plex and the latest version was downloaded instead. I watched a movie with TrueHD track and after about an hour the sound paused for maybe half a second. When the sound restarted it was out of sync with the picture.
I stopped the movie and restarted it only to have to problem reoccur a couple more times before the movie ended.
TrueHD Atmos videos are playing fine for me on my Shield (2019 Pro SW v8.2.3).
What’s the movie? If the disc has seamless branching, that might be the issue. MakeMKV fixes a lot of them, but some still have very small sync issues that have issues when passed through.
I’m having a similar issue, but I never get audio sync issues. Probably because it becomes unplayable sometimes and I have to fully restart the playback.
I haven’t seen enough traction on the issue so I am going to factory reset my Shield at the weekend to see if that helps. The upgrade to 9.0 a while back really messed things up so it could be a chance at fixing it.
Agree on the above aswell on the branching issue too, if its a specific movie
When I play the movie in VLC, the Windows 10 app or the iPhone app there is no gap in sound.
Every time however, when I play the movie in the nVidia Shield app the sound pauses in the transition from chapter 8 to 9 (at about 53:30 when the actor cuts open a seal).
VLC and the Win10 app use software decoding, and I believe the iphone app transcodes the audio. The Shield can only passthrough HD audio, not decode it.
I can’t find anything about that movie being seamless branching, but if it happens at the same time every time, it sounds like either a branching issue or a bad remux.
If it’s the 2012 version, then yes, it has seamless branching. And if it’s the original release from December 2012, that was a huge mess, even for stand-alone players.
This is the 2012 version, yes, but I do not know if it is the original release…
I had to search for this “seamless branching” phrase as I did not know what it was. If I understand the problem correctly this is related to this specific movie (and those movies that might have this seamless branching applied). At least it seems not to be a Plex or Shield issue.
Now i wonder:
I use MakeMKV when ripping my blu-rays. Can I rip this movie again somehow, maybe with other settings, and fix this issue?. Or will it be this way every single time because the problem is on the disc itself?
When I rip a new movie: Is there a way to check if the newly created MKV file has this issue without watching the entire move?
Basically - is there anything I can do to avoid this?
You can enable debug logging in MakeMKV. It will show the timestamps where it had to manually fix the audio overlap in seamless branching discs.
Note: Just because that message shows up doesn’t mean it’s going to have a problem, but it gives you the timestamp so you know where a problem could occur.
No, it’s still an issue last time I checked. Recent MakeMKV versions do fix several seamless branching movies with TrueHD, just not all.
The movies it fixes tend not to have any debug messages indicating an audio correction, so if I see these messages, there’s a chance of playback problems.
Chuck, as far as we know, Plex having issues with seamless branching comes to down to using ExoPlayer.
I could be wrong, but I think that eac3to (eac3to - audio conversion tool - Doom9's Forum) is still the tool to use for seamless branching discs. It’s what the release groups have been using, traditionally. Having never used the software myself, I had no idea it was made by madshi
They only recently added their TrueHD seamless branching fix, but I don’t have any discs that fail with MakeMKV currently in possession.
Have you tested eac3to with TrueHD seamless branching? It still had trouble last time I tried. I’ve put off buying some movies because of this issue.
