Something’s changed with my Sony TV. It now plays MKVs made with MakeMKV in color, but the color is off, seems very red shifted. (i.e. lips look like covered in lipstick and skin looks sunburned). This is different than previously with where they were black and white.
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You should be able to select the AC3 core
I would love to, but as I mentioned, at least in what Plex is showing, there are only two AC3 tracks and they are both commentary ones; there isn’t an AC3 core of just the main film audio.
I reported similar behaviour to this earlier on so it’s good to see that someone else has experienced the same issue. Hopefully Plex can investigate this.
Slightly OT, but I am seeing the same behaviour re DV in the Disney+ app when watching the Mandalorian so it would seem that the issue is still, at least partly, in the DV renderer in the Shield Experience.
If you’re muxing the files yourself using MakeMKV then you can include the AC3 core
Responded privately.
And to confirm for the rest of the thread: I just attempted converting the TRUEHD7.1 stream to AC3 5.1 and remuxing that audio in. When I played it back, DV worked fine. It seems like there’s some kind of interaction (limitation?) with Plex and the Shield tube not having enough juice to play both the DV layer and the TRUEHD audio stream.
I can also confirm that the issue does NOT occur with DTS-HD audio streams and DV kicks in every time.
Hi, might seem off topic but I think it’s connected, Zidoo Z9X (android) chokes on Dolby Vision files with True HD, whilst Profile 7 or 8 with DTS-HD MA X, ac3, pcm, aac, flac etc all play fine.
off topic, but truehd does not have an AC3 core.
most UHD disks do include a separate AC3 (or dts) 5.1 or stereo mix, track.
DTS on the other hand, is made up of lossy core + lossless extension.
in other words, with dts-hd-ma, it includes the lossy audio and lossless audio.
truehd has no lossy component, truehd and dolby digital are 2 distinct/separate audio streams.
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Correction, TrueHD does not have ac3 core when re-muxed to MKV.
True HD in BDMV or m2ts needs to have ac3 core.
No, I am pretty sure there is absolutely NO ac3 core in any truehd.
bluray players can decode and downmix truehd to applicable pcm streams as needed.
there isn’t much here, but check @ https://en.wikipedia.org/wiki/Dolby_TrueHD
if there was an AC3 core to truehd, then plex would not need to transcode truehd to ac3 for non-truehd clients.
TrueHD always has an AC3 core on the disc
no, TrueHD always has a SEPARATE AC3 stream on the disc.
there is no AC3 core to truehd, they are SEPARATE things.
DTS is the audio codec that has lossy core + lossless extension.
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It’s EMBEDDED AC3, if YOU check ANY TrueHD track in BDinfo YOU will see IT.
DTS-HD has a lossy DTS core, TrueHD does not have a lossy core, but includes a companion ac3 track on BluRay Discs. This is well documented and known. No need for the all caps or snark.
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Thanks @DaveBinM. The takeaway though is that there appears to be an issue with DV and TrueHD tracks. Are you guys looking into this?
There’s no specific issue with TrueHD tracks (I’ve tested both with and without TrueHD). The underlying issue here is that sometimes the Dolby Vision decoder crashes (which we have no control over), and we’re working with Nvidia to resolve that
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Thank you. It’s reassuring to hear that you are still working with Nvidia.
I posted this in another thread but I’ll repost here, as it details the steps I take to get it to trigger DV…
I’ve found that Plex is unreliable at playing DV, always after a reboot of the Shield(I have it set to 59.95 HDR and DV ready). After a reboot, none of my DV movies initially trigger DV or even HD at first(I have both 4K and regular blurays ripped for other TV’s). I have to go through a routine to get Plex to start recognizing DV.
After a reboot, when just pressing play the first time on any DV movie, it looks like it is trying to play the 4K DV, version but fails and I get a generic greyish background for a couple seconds, then black, then another generic greyish background again(I’m assuming it’s failing the 4K test too), then it starts playing the regular Bluray version.
If I stop it and then force it to play the 4k specific version, it will then only give me the greyish screen once and proceed to play the 4K version but not in DV. If I THEN stop again and go back and hit the normal Play button again, everything then works mostly ok, from then on, until another reboot. It will play not only the 4K version but also trigger DV on MOST of my DV content. This pattern is pretty constant after a reboot of the Shield.
I have tried…
1917
A Quiet Place
The Matrix
The Matrix Reloaded
The Matrix Revolutions
Atomic Blonde
John Wick 3
Ready Player One
These have all been ripped with MakeMKV 1.15.3. The only movie that continues to be stubborn(after I get the Shield to start playing DV consistently) is the original Matrix movie. It is still picky in that it won’t always start in DV and I have to restart it until it does.
The main issue though is after a reboot, nothing works until I force it using the routine above.
As a note, I have a Sony X950H TV and using the old method of creating a single layer .ts version always worked 100% of the time with Plex.
I believe we’ve reported that while it’s improved, it’s not entirely resolved, though I need to follow this up internally (have been a bit tied up in tone mapping stuff this week 
)
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