ATMOS Audio Drop Outs - Details thread


#81

Most of my rips are to m2ts and the Oppo plays all. No Cinavia problems. Also I have one movie that has some Atmos drop outs and that’s a MKV of Batwatch that someone else did. I seen some MKV movies that had problems with Atmos but that was early on and with the newer version of MKVToolkit I haven’t seen it for a while.


#82

Are you sure the m2ts file has Cinavia? Studios have given up for it now, so the recent releases from 2017 to present day there’s a 90% chance they don’t have it. However if you play a Lionsgate/Universal/Sony Title from 2016 such as The Magnificent Seven or Hunger Games Mockingjay 2 that has Cinavia. I did try those with a BDMW folder back a while ago but I’ve updated like 3 firmware since then.

Haven’t tried Baywatch, I have that one ripped but haven’t even watched it yet. However luckily if the drop out is exclusively from the UHD-BD, you can mux the 1080p BD Audio since it’s the same Atmos track, maybe it’s worth a try.


#83

I have both those movies and they are playable, but they have been re-encoded video to reduce the file size with un-touched or passthrough audio and subs. Over the years I have used DVDFab, Passkey 9 or MakeMKV. DVDFab has reported Cinavia at times but I’ve never had a problem.


#84

FYI from Hendrik/Nevcairel (LAV Author)

So far we have confirmed the issue with the following, but are there any other examples?

  • “Pirates of the Caribbean - Dead Men Tell No Tales” - Max Bit rate is 11.9 Mb/s : eg drops out a couple of times between 17:45 and 19:00 minutes into the movie
  • “Guardians of the Galaxy Vol II” - Max Bit rate is 11.3 Mb/s: eg drops out at 1:09:24 where TaserFace gets killed is one example.
  • “Maze Runner: The Death Cure” - Max Bit rate is 12.1 Mb/s: eg Right at the beginning of the Main Title when the 20th Century clip is running. Drops outs so frequent that playback can actually stall

#85

For those who use LAV filters, there is a test version out you can try now:

I’ll be trying this either later tonight or tomorrow (likely) with JRiver MC 24.

Cheers


#86

Looks good so far! I’ve done some testing and left feedback at GitHub. Results look good for file playback (but issues with BD Menu based playback).


#87

Changes are now in the Latest LAV Nightly - https://files.1f0.de/lavf/nightly/

Looks good on file playback. I’m seeing issues with some discs using BD Menu playback but that seems to be another issues (maybe in MC).


#88

Rebuilt my HTPC just so I could try the ‘fix’. So far it seems to work like a charm. I really hope this propagates to Kodi and Android’s ExoPlayer (or at the very least the custom ExoPlayer Plex uses).


#89

well the code is out there and open source so there is hope

what did you test with?


#90

Yup looks good, and Hendrik as found and fixed a separate bug (it was in MC not LAV) with Maze Runner doing funny stuff when bitstreaming ATMOS when in BD Menu Mode.

Now that the Bitstreaming High Bit Rate TrueHD (aka ATMOS) fix is in LAV Nightly I’m sure other devs will pick it up and push to their players. Good on Hendrik for looking at this (he rewrote the module), as while it is only 3 discs so far, it was getting a pain to segregate these out.


#91

I am running MPC-HC as an external player with madVR and the latest LAV nightly under Plex for Kodi. Haven’t experienced any audio dropouts thus far. Props to Hendrik for sorting this out. Can’t wait to see more players fixed.


#92

if i recall we can just unzip the LAV package over what Mc installs in the plugins folder, correct?


#93

Yup that is correct


#94

done and working well


#95

Yup I think this one is fixed. Hendrik is also making more changes in MC for BD Menu Playback. Looking forward to when it is all packed up as part of MC.


#96

i am still on the fence with menus. read your PM (thanks for the reply) but still seems odd to take a season of a show and have each disc separate for that season.

i am thinking however for movies with quality extras, i can rip each disc to folder and stack them in jriver. and then can inselect which disc to launch?

the cool thing about jriver is that you can pretty mich organize however you want. it’s a personal choice really :wink:


#97

catching up on some older titles. the Bourne collection, Incredibles (geez. i just could not help myself), Jumanji (new version).

oh for those that use Atmos - Game of Thrones, Season 6 episode 8, “No One” has audio dropouts. @jmone1 has been working with Hendrik of JRiver and there is a fix coming soon for those who use JRiver. Interestingly the audio dropouts, which occur largely during the opening theme song, do not occur on any other episode in the season for me. How strange.


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#98

@TheShoe - FYI Hendrik (Nevcairel) has been working on refining his new TrueHD Decoder that deals with the high bit rate Atmos drop out issues and in JRiver MC changing the audio buffer to be dynamic based on the frame rate of the movie and allows enough space to perform Convolution (for those that use that feature). The latest LAV Nightly should be out in a few more hours which should fix GOT S06E08. … but it is odd that the rest did not have this issue. Given the TrueHD decoder code is a all new, I guess we will see/hear issues on other discs but once reported to Hendrik he fixes any bugs in a few days. Props to Hendrik for being able to write a decoder that has no public spec!


#99

Very interesting. I have the standard BD version of GoT season 1 re-release with Atmos. I never got around to watching it, but I assume the Atmos track on the UHD version is the same. Do you have the timecode for a dropout?

Edit: Think I will check the BD versus the UHD BD version and see if they are, in fact, the same.


#100

i dont have timecodes for that episode, but there are at least three during the first two mins of the opening theme.

i’ll be sure to capture more data but give that episode a play and see what happens for you.