96/24 DTS 5.1 with video stutters

[kaledi 41]

Just bought the new Depeche Mode Spirits in the Forest Blu-ray that has a DTS HD 94/24 sound track (impressive audio and concert ).

Played through EMBY either as a direct rip or re-encoded as HEVC the video drops frames every second or so.  This only happens when playing the DTS HD 96/24 soundtrack.  Change to DD or PCM, or vanilla DTS and it plays fine.  Is there any known issue with DTS HD 96/24?  Playing through Shield TV pro 2019, via WD PR4100.

[ebr 16176]

Hi.  Can we please look at an example?

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[kaledi 41]

Attached is the log file as I played the movie.  Fiirst fired it up with a DD soundtrack and it played absolutely fine.  I then changed the audio to the DTS HD 96/24 soundtrack and it dropped frames.

Additionally, and for reference, I tried the same process in PLEX and got the same results as described here with EMBY.  I also tried MrMC and this worked much better.  Generally playing the viideo with DTS HD 96/24 fine, but with an occasional dropped frame.

possibly a related issue is the file also includes a PCM 24 bit 2 channel audio option.  When played through EMBY the video stutters in the same way as wtih the DTS HD 96/24 audio and bizzarly, the output audio is reported as DTS!

This is being played out of a Shield TV pro (2019) into a Marantz reciever that can accept all these audio formats.

 

 

Edited June 28, 2020 by kaledi

[ebr 16176]

I'm going to guess the player just cannot handle the additional bitrate but can you please follow the instructions in that topic to send a log from the app after experiencing the problem?

Thanks.

[kaledi 41]

Ah, yes of course, forgot the in app log.  Will do it now

 

[kaledi 41]

Sent at 20.46 UK time, which I make as 15.46 EST

EMBY NAS is the name of the server

details the same but played DTS HD 96/24 first, then DD and then LPCM 24

1. The video had been re encoded into HEVC and a file size that is way less than the original.

[ebr 16176]

Getting a bunch of discontinuity errors.  Are you sure this is a good encode?

06-28 20:45:45.471 12879 12879 E EventLogger: audioTrackUnderrun [eventTime=13.56, mediaPos=752.18, window=0, period=0, 48000, -9223372036854775807, 10]]
06-28 20:45:45.503 12879 13315 E AudioTrack: Discontinuity detected [expected 752292666, got 752495666]
06-28 20:45:45.711 12879 13315 E AudioTrack: Discontinuity detected [expected 752698333, got 752900666]
06-28 20:45:45.917 12879 13315 E AudioTrack: Discontinuity detected [expected 753103333, got 753306000]
06-28 20:45:46.117 12879 13315 E AudioTrack: Discontinuity detected [expected 753508666, got 753712000]

 

[Painkiller88 248]

5 minutes ago, kaledi said:

Sent at 20.46 UK time, which I make as 15.46 EST

EMBY NAS is the name of the server

details the same but played DTS HD 96/24 first, then DD and then LPCM 24

1. The video had been re encoded into HEVC and a file size that is way less than the original.

What happens if you direct play this file on your shield? (not with emby)

Edited June 28, 2020 by Painkiller8818

[kaledi 41]

I get the same visual result with the original rip made by MAKEMKV.  I will send the equivalent file for that original file later.

[kaledi 41]

I'll also attempt a direct play - I guess you mean using something like VLC with a direct path to the network share?

[kaledi 41]

Quote

 

Back to the encode - I will do another rip in case that is the problem, though that would be first time I've had a bad rip.

[Luke 42078]

Let us know how you get on. Thanks.

[kaledi 41]

Tried a new rip and the same result.  As a reminder, both the original file and a re-encoded HEVC file with the audio streams passed through.

I also triied the companion movie that came on a second disc that also comes with a DTS 96/24 soundtrack and I see exactly the same behaviour.

[Luke 42078]

That's interesting, so it's specific to this one movie?

[kaledi 41]

I'm not sure I have any other multichannel DTS-HD 96/24 soundtracks.  I have some vanilla DTS 96/24 soundtracks and these play fine.

 

[rbjtech 5284]

96/24 DTS-HD + Video is pretty rare.  Is it worth demuxing the DTS-HD track to just an audio version (.mka or ..dtsma) and see how that plays ?  If it's ok - then I suspect the player does not cater for the 96KHz sample rate when interleaved with video - and it's tripping it up as it's expecting 48KHz.

[kaledi 41]

Does EMBY support MKA?  I can try.

Of note, the audio plays absolutely fine as a 96/24 DTS-HD, it is the video that stutters with this audio track selected.  It is behaves this way if I select the LPCM 24bit audio track.  However, the video and audio play fine if I select the core DTS track (extracted during the rip) or  DD tracks.

The above behaviour is repeated in PLEX, but I can get the video to play in a much more stable way with MrMc, though there is occasional hints of dropped frames - no idea if this gives any insight into the challenge here.

96/24 non-HD DTS does play fine in my experience.  I'm thinking of some music DVDs, but I'll check whether I have any Blu ray with that type of soundtrack

[ebr 16176]

I suspect it is something that ExoPlayer is simply not expecting.  They use the audio track as the "heartbeat" for timing the video I think so that may be why you see the effect in the video track.

Raw Exo actually doesn't even support DTS-HD - we've kind of "forced it" too with a modification and I imagine that is where the issue lies.  Google is dragging their feet on true DTS-HD support.