Z9X Pro Audio Stutters E-AC3 (DD+)

Discussion in 'HDD Media player(RTD 1619BPD)' started by Chris Barker, Oct 4, 2024.

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  1. Chris Barker

    Chris Barker New Member

    I have numerous MKV files that use E-AC3 (DD+) format for audio. All of these files playback correctly with Plex. In my new Z9X Pro when I play back these files the audio has a constant rate stutter and are unlistenable. I have changed every setting (Auto/Raw) I can see to change and nothing fixes the issue. I am running the latest firmware as of today. I also just reset the player to factory and the issue still remains. Other audio formats such as Atmos, DTS, etc work correctly. My processor is the Emotiva MC1 and works very well with my Sony OLED TV, Oppo 203, etc.
     
  2. Visconti12

    Visconti12 Active Member

    Basically the stutters issue was fixed on last firmwares. Are you playing it from a NAS? Wifi or Ethernet cable?

    Take a look to this thread on this line http://forum.zidoo.tv/index.php?threads/occasional-jerky-choppy-playback.97341/
     
    Last edited: Oct 4, 2024
  3. Chris Barker

    Chris Barker New Member

    I am using a NAS which has worked well for 15 plus years with Plex, Roon, etc.

    4K and Atmos, DTS, etc work fine. It's just E-AC3 DD+ that have this issue.
     
  4. Chris Barker

    Chris Barker New Member

    I should also mention that the video is encoded with H.265 in a MKV container.
     
  5. Markswift2003

    Markswift2003 Well-Known Member SUPER Administrator Beta test group Contributor

    Never had an issue with E-AC3 - can you post a sample file?
     
  6. Chris Barker

    Chris Barker New Member

    Okay, I clipped 1 mins of a sample file.
     

    Attached Files:

  7. Markswift2003

    Markswift2003 Well-Known Member SUPER Administrator Beta test group Contributor

    I'm AFZ until tomorrow - I'll try to remember to check this out tomorrow evening...
     
  8. qsnake

    qsnake Member

    I have this issue on z9x with DDP2.0 audio. DDP5.1 dosen't have the problem
     
  9. Markswift2003

    Markswift2003 Well-Known Member SUPER Administrator Beta test group Contributor

    Well, I completely forgot about this! Mind like a sieve...

    Anyway, I get exactly the same as you with a Z9X Pro - broken audio.

    I tried my own h.264 and h.265 E-AC3 5.1 files here on a Z9X Pro and they play fine, so it's got to be something to do with the compliance of the file.
     
  10. Chris Barker

    Chris Barker New Member

    I use Vidcoder which uses the Handbrake back end. Typically I just copy Dolby E-AC3 without transcoding. My file plays in Plex streaming to all my TVs and Android, etc. Plays in VLC just fine. Until proven otherwise, it's a Zidoo bug. Hopefully they will see this and fix? Or, how do I submit a bug report.
     
  11. Markswift2003

    Markswift2003 Well-Known Member SUPER Administrator Beta test group Contributor

    It's a tricky one - some players are more tolerant of poorly compliant files, some less so.

    What happens if you play the original file before encoding?
     
  12. Chris Barker

    Chris Barker New Member

    The original file is just a rip from the Blu-ray so it should play just like a Blu-ray. I don't know why this matters? The vector that seems to be the problem is the combo of H.265 video and E-AC3.
     
  13. Markswift2003

    Markswift2003 Well-Known Member SUPER Administrator Beta test group Contributor

    It very much depends on how it was ripped and with what - I use MakeMKV followed my MKVToolnix exclusively and quite honestly have never had any issues at all.

    I used DVDFab years ago and that was beset by problems, hence why I don't use it now.

    There's no intrinsic issue at all with h.265 and E-AC3.
     

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