[HELP] OPUS 7.1 audio problem (?)

[shazzla]

Greetings !

I did an x265 conversion with OPUS 7.1 and OPUS 5.1 audio.
The resulting .mkv heavily stutters with the 7.1 OPUS audio. If i switch to 5.1 ,everythings fine.
With 7.1 audio ,CPU usage is ~30 %...
No matter what player i use. Never experienced like this before....
Any idea guys ?

Some infos :

Hybrid : V2024.06.09.1
CPU : i5-6600
RAM : Much more than enough
Audio 1 source : TrueHD/Atmos Audio English 4944 kbps 7.1+11 objects / 48 kHz / 4304 kbps
Audio 2 source : Dolby Digital Audio 640 kbps 5.1 / 48 kHz / 640 kbps
Any errors : Nope

Sample : Cant upload ,due to copyright laws.

Other infos from player :

      Format : Matroska
      Format version : Version 4
      File size : 2.15 GiB
      Duration : 2 h 10 min
      Overall bit rate : 2 361 kb/s
      Encoded date : UTC 2024-06-17 05:35:38
      Writing application : mkvmerge v83.0 ('Circle Of Friends') 64-bit
      Writing library : libebml v1.4.5 + libmatroska v1.7.1
      Encoding Gui : Hybrid 2024.05.11.1
  Video #1
      ID : 1
      Format : HEVC
      Format/Info : High Efficiency Video Coding
      Format profile : Main 10@L4.1@High
      Codec ID : V_MPEGH/ISO/HEVC
      Duration : 2 h 10 min
      Bit rate : 1 873 kb/s
      Width : 1 920 pixels
      Height : 1 080 pixels
      Display aspect ratio : 16:9
      Frame rate mode : Constant
      Frame rate : 23.976 (24000/1001) FPS
      Color space : YUV
      Chroma subsampling : 4:2:0
      Bit depth : 10 bits
      Bits/(Pixel*Frame) : 0.038
      Stream size : 1.70 GiB (79%)
      Writing library : x265 3.6+13-9a75b5947:[Windows][GCC 13.2.0][64 bit] 10bit
      Default : Yes
      Forced : Yes
      Color range : Limited
      Color primaries : BT.2020
      Transfer characteristics : PQ
      Matrix coefficients : BT.2020 non-constant
  Audio #2
      ID : 2
      Format : Opus
      Codec ID : A_OPUS
      Duration : 2 h 10 min
      Bit rate : 245 kb/s
      Channel(s) : 8 channels
      Channel layout : L
      Sampling rate : 48.0 kHz
      Frame rate : 50.000 FPS (960 SPF)
      Compression mode : Lossy
      Stream size : 229 MiB (10%)
      Writing library : opusenc from opus-tools 0.2-34-g98f3ddc
      Language : English
      Default : Yes
      Forced : No
      Comment : Processed by SoX
      ENCODER_OPTIONS : --bitrate 352 --comp 10 --framesize 20 --expect-loss 0 --max-delay 1000
  Audio #3
      ID : 3
      Format : Opus
      Codec ID : A_OPUS
      Duration : 2 h 10 min
      Bit rate : 239 kb/s
      Channel(s) : 6 channels
      Channel layout : L R C Ls Rs Cb LFE
      Sampling rate : 48.0 kHz
      Frame rate : 50.000 FPS (960 SPF)
      Compression mode : Lossy
      Delay relative to video : 11 ms
      Stream size : 223 MiB (10%)
      Writing library : opusenc from opus-tools 0.2-34-g98f3ddc
      Language : Hungarian
      Default : No
      Forced : No
      Comment : Processed by SoX
      ENCODER_OPTIONS : --bitrate 256 --comp 10 --framesize 20 --expect-loss 0 --max-delay 1000


And thats all.... ( At the moment, I'm away from my PC.)