Roku Ultra buffering on BluRay Rip

Plex Players Streaming Devices
,
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2 weeks have passed, so I am pinging again

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2 more weeks. Stuck in lockdown, would love to be using Plex on Roku.

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You are destroying your files - somehow.

The ā€˜sampleā€™ above says itā€™s an hour and 50 minutes long, but thereā€™s nothing on it.
When I remux the file - itā€™s now 1 second long - and thereā€™s nothing on it.

I think whatever drawing board you were working on - go back there 'cause what youā€™re doing isnā€™t working. You may be destroying the samples. What Iā€™ve seen so far isnā€™t media - and if it is, it needs to be longer than a second.

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I took a Blu-ray MKV rip (which plays on RasPlex and VLC), and ā€˜ddā€™ the file head. Yes, the metadata says it is longer that the file actually has, but (for example) VLC plays the content in it.

Iā€™ll try using mkvtoolnix

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Remuxed with mkvtoolnix

Spider-Man-dbg-001.mkv.gz (24.3 MB)

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Pinging this thread again.

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I donā€™t even have an unpacker for that crap.
ā€¦and Iā€™m not going to get oneā€¦

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for a .gz? Thatā€™s a standard compressed-file format for about 30 years now. Why does the site allow it if you wonā€™t deal with it? You want a zip? Here.

Spider-Man-dbg.zip (24.3 MB)

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2 weeks later, pinging again.

I went and tried Emby, and while they have a bunch of other problems, they donā€™t seem to have THIS problem.

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I have tested the sample, and every variation works for me.

Using a setup having support for DTS (global video quality set to original)

  • Video direct played
  • Every audio stream I choose worked, include the DTS-X (MA) audio - it was converted, or when I enabled the ā€œAllow DTS-HDā€ option to pass the core through, it direct played.

Using a setup without DTS support (global video quality set to original)

  • Video direct played
  • All audio streams worked again, and the DTS streams were converted to AC3 5.1 audio.

Using a setup with lower quality settings (backed down from original quality)

  • Full transcode worked properly, and could play option, while audio and video were converted.

Iā€™m at a bit of a loss here, not having the ability to replicate the failure on a Roku. Possible Iā€™m not replicating something in your client setup, of there is something going on with the synonolgy.

Could you follow the steps below so I can examine the client logs?

  • Open the Plex channel
  • Enable Remote Logging in the settings
  • Attempt to play the video, and let it fail
  • Disable Remote Logging
  • Report back with the time/timezone and username if different than your forums user.
73

Weirdly, now this file plays. But the original still doesnā€™t (though behavior seems different - now it stalls for a second and then goes to the ā€œPreviousā€ screen without trying to play the media.

I am trying to find a media file that fails and isnā€™t 23GB

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I remuxed the whole 23 GB file, and bizarrely it seems to play now. What info can I provide to understand this?

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I repeated this on another problematic title (Solo, 40 GB) and it ALSO works.

Something about the MKV file that MakeMKV produces makes Plex/Roku unhappy.

How can I find out more?

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I ran mkvinfo on both, hereā€™s the diff

remux.diff.txt (9.2 KB)

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Any thoughts on this?

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Ping?

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I think the most interesting part of that diff might be this:

-| + Lacing flag: 1

The original file had lacing enabled, the remuxed one doesnā€™t.

Historically lacing hasnā€™t been a well-supported feature in players, and even the used-by-Plex-on-Android ExoPlayer struggled with it

This is amusing because they refer back to the Plex forums:

I donā€™t know if the Roku, specifically, has trouble with Lacing. I know that MKV lacing and compression are common container compatibility issues for dumb ā€œsmartā€ devices. Thatā€™s one thing that remuxing and ā€œMKV Fixingā€ utilities often remove.

The newest version of MakeMKV is just a few days old. It might be worth trying that, to see if the behavior has changed.

Iā€™m curious if your problem files all have Lacing enabled, and if your working files donā€™t.

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Good idea. Latest MakeMKV still sets Lacing (I just tried re-encoding one). Some of the films that work do have Lacing set, and some do not. :frowning:

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Darn! Yeah that was the biggest hole in the theory anyway - MakeMKV is super popular and there would be a lot more noise about this.

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