Audio Delay With Dolby Digital Plus

[banderson1311 5]

I'm trying out Emby on my Fire Stick 4K.  Most videos play flawlessly but I noticed I'm getting noticeable delay in the audio if the video uses Dolby Digital Plus (eac3).  Logs are attached.  Any suggestions on how to further troubleshoot would be greatly appreciated.

embyserver.txt

ffmpeg-remux-3da9038b-80ee-4154-962c-e4dbd0c02b20_1.txt

[Luke 37248]

Hi there, are you able to play the same file using the Emby web app?

[banderson1311 5]

It plays properly through the web app on my laptop.  I will try the webapp on the Fire Stick later today as well.

[Luke 37248]

Great, thanks !

[banderson1311 5]

I had a similar delay through the web app on the TV I've been testing on (LG).  I tested on the other two TVs in my house and had interesting results. 

 

On an Insignia TV using the same model of Fire TV Stick 4K I saw the same delay both with the Emby app and through the web.

 

On a Vizio TV using a previous generation Fire TV 4K (from 2017?) I did not see delays from either.

 

This leads me to believe it's either related to the newer Fire TV Sticks or something else with my TV or soundbar.  It's still weird that it's only this codec though.

[Luke 37248]

Is the audio delay built into the file? You can check with a tool like MediaInfo.

[banderson1311 5]

I can check MediaInfo but the same delay is occurring for any file using eac3.

[Luke 37248]

Please let us know what you find. Thanks.

[banderson1311 5]

I took a look at a few of my eac3 files and they do seem to indicate a delay.  However the delay is pretty minimal (~10ms) and audio is off by 200+ ms.

General
Unique ID                                : 39808393596372312695535454588016022340 (0x1DF2D15686774621588442B577885344)
Complete name                            : Z:\TVShows\Curb Your Enthusiasm\Season 10\Curb Your Enthusiasm - 10x08 - Elizabeth, Margaret and Phillip.mkv
Format                                   : Matroska
Format version                           : Version 4
File size                                : 751 MiB
Duration                                 : 38 min 38 s
Overall bit rate                         : 2 716 kb/s
Encoded date                             : UTC 2020-03-09 02:30:25
Writing application                      : mkvmerge v38.0.0 ('The Silent Type') 64-bit
Writing library                          : libebml v1.3.9 + libmatroska v1.5.2

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L3.1
Format settings                          : CABAC / 5 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 5 frames
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 38 min 38 s
Bit rate                                 : 2 458 kb/s
Width                                    : 1 280 pixels
Height                                   : 720 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                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.111
Stream size                              : 679 MiB (91%)
Default                                  : Yes
Forced                                   : No

Audio
ID                                       : 2
Format                                   : E-AC-3
Format/Info                              : Enhanced AC-3
Commercial name                          : Dolby Digital Plus
Codec ID                                 : A_EAC3
Duration                                 : 38 min 38 s
Bit rate mode                            : Constant
Bit rate                                 : 256 kb/s
Channel(s)                               : 6 channels
Channel layout                           : L R C LFE Ls Rs
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Delay relative to video                  : 11 ms
Stream size                              : 70.8 MiB (9%)
Service kind                             : Complete Main
Default                                  : Yes
Forced                                   : No

Text
ID                                       : 3
Format                                   : S_TEXT/WEBVTT
Codec ID                                 : S_TEXT/WEBVTT
Duration                                 : 38 min 35 s
Bit rate                                 : 133 b/s
Count of elements                        : 1037
Stream size                              : 37.6 KiB (0%)
Language                                 : English
Default                                  : Yes
Forced                                   : No

I also tried using the LG app to bypass the Fire TV Stick but the same thing occurred.  I'm wondering if this might just be an issue with my TV and sound bar since it doesn't seem to be happening for others.

[Luke 37248]

Ok, we're about to release Emby Server 4.4 so i would suggest re-evaluating with that once available. Thanks.

[banderson1311 5]

Sounds good.  I will try again when 4.4 is ready.  Thanks for your help.