QN65Q70AAFXZC multiple audio issues

[VVagnard]

Server Version#: 1.27.1.5916
Player Version#: 5.41.1

Logs:
Plex Media Server Logs_2022-07-16_17-40-22.zip (4.1 MB)

The Plex experience with this TV (QN65Q70AAFXZC) is really bad at the moment,
The most problems I encounter are audio issues.

Note that theses issues does not happen on another LG tv and my other Samsung tv (UN43TU7000FXZC)

1- Transcoding audio (AC-3 Stereo) to AAC (seems to happens when the audio track is not the first one). I expect direct play here. EDIT: CONFIRMED BY THE LOGS
Example of a mkv that does this :

Audio #1
ID : 2
Format : E-AC-3
Format/Info : Enhanced AC-3
Commercial name : Dolby Digital Plus
Codec ID : A_EAC3
Duration : 49 min 36 s
Bit rate mode : Constant
Bit rate : 640 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
Stream size : 227 MiB (11%)
Language : English
Service kind : Complete Main
Default : No
Forced : No

Audio #2
ID : 3
Format : AC-3
Format/Info : Audio Coding 3
Commercial name : Dolby Digital
Codec ID : A_AC3
Duration : 49 min 35 s
Bit rate mode : Constant
Bit rate : 192 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Compression mode : Lossy
Delay relative to video : 1 s 0 ms
Stream size : 68.1 MiB (3%)
Language : French
Service kind : Complete Main
Default : Yes
Forced : No

2- Completely inaudible or corrupted audio with PCM:

Exemple no sound / corrupted for both tracks I think they are converted agin to AAC:

Audio #1
ID : 2
Format : PCM
Format settings : Big / Signed
Codec ID : A_PCM/INT/BIG
Duration : 2 h 6 min
Bit rate mode : Constant
Bit rate : 13.8 Mb/s
Channel(s) : 6 channels
Sampling rate : 96.0 kHz
Bit depth : 24 bits
Stream size : 12.2 GiB (38%)
Language : English
Default : Yes
Forced : No

Audio #2
ID : 3
Format : PCM
Format settings : Big / Signed
Codec ID : A_PCM/INT/BIG
Duration : 2 h 6 min
Bit rate mode : Constant
Bit rate : 4 608 kb/s
Channel(s) : 2 channels
Sampling rate : 96.0 kHz
Bit depth : 24 bits
Stream size : 4.07 GiB (13%)
Language : English
Default : No
Forced : No

Text
ID : 4
Format : PGS
Muxing mode : zlib
Codec ID : S_HDMV/PGS
Codec ID/Info : Picture based subtitle format used on BDs/HD-DVDs
Language : English
Default : Yes
Forced : No

3- FLAC audio file with no sound

Example this file is not playing any sound:

Audio
Format : FLAC
Format/Info : Free Lossless Audio Codec
Duration : 5 min 35 s
Bit rate mode : Variable
Bit rate : 5 588 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 192 kHz
Bit depth : 24 bits
Compression mode : Lossless
Stream size : 223 MiB (100%)
Writing library : ProStudioMasters

I think every time when I look at the server it is always trying to convert to AAC while most of the file should be able to direct play. At least they do on my most cheaper Samsung TV.

[VVagnard]

awesome…

[sLumpy]

Could you provide some logs, and a sample clip that reproduces the issue? I’m not seeing issues on my TV.

[VVagnard]

@sLumpy

Here are the logs
Plex Media Server Logs_2022-07-16_17-40-22.zip (4.1 MB)

What seems interesting in the logs for a problematic file :
Jul 16, 2022 15:43:32.869 [0x7feb339f0b38] INFO - [Req#3000] [Plex for Samsung] [VVagnard:d9pu8xpm4gguh9900fm84m2x] [MDE] Application decision, directPlay: false, directStreamVideo: true, directStreamAudio: true
Jul 16, 2022 15:43:32.869 [0x7feb339f0b38] INFO - [Req#3000] [Plex for Samsung] [VVagnard:d9pu8xpm4gguh9900fm84m2x] Cannot direct play with protocol: http, codec: ac3. Reason: Player does not support selecting alternative audio stream.
Jul 16, 2022 15:43:32.869 [0x7feb339f0b38] INFO - [Req#3000] [Plex for Samsung] [VVagnard:d9pu8xpm4gguh9900fm84m2x] videoStream: {
“id”: 262242,
“streamType”: 1,
“default”: true,
“codec”: “h264”,
“index”: 0,
“bitrate”: 4934,
“bitDepth”: 8,
“chromaLocation”: “left”,
“chromaSubsampling”: “4:2:0”,
“codedHeight”: 800,
“codedWidth”: 1920,
“colorPrimaries”: “bt709”,
“colorRange”: “tv”,
“colorSpace”: “bt709”,
“colorTrc”: “bt709”,
“frameRate”: 24,
“hasScalingMatrix”: false,
“height”: 800,
“level”: 40,
“profile”: “high”,
“refFrames”: 4,
“scanType”: “progressive”,
“title”: “Star.Trek.Strange.New.Worlds.S01E07”,
“width”: 1920,
“displayTitle”: “1080p (H.264)”,
“extendedDisplayTitle”: “Star.Trek.Strange.New.Worlds.S01E07 (1080p H.264)”
}
Jul 16, 2022 15:43:32.869 [0x7feb339f0b38] INFO - [Req#3000] [Plex for Samsung] [VVagnard:d9pu8xpm4gguh9900fm84m2x] audioStream: {
“id”: 262244,
“streamType”: 2,
“selected”: true,
“default”: true,
“codec”: “ac3”,
“index”: 2,
“channels”: 2,
“bitrate”: 192,
“language”: “Français”,
“languageTag”: “fr”,
“languageCode”: “fra”,
“audioChannelLayout”: “stereo”,
“samplingRate”: 48000,
“displayTitle”: “Français (AC3 Stereo)”,
“extendedDisplayTitle”: “Français (AC3 Stereo)”
}
Jul 16, 2022 15:43:32.869 [0x7feb339f0b38] INFO - [Req#3000] [Plex for Samsung] [VVagnard:d9pu8xpm4gguh9900fm84m2x] subtitleStream: {
“id”: 262245,
“streamType”: 3,
“selected”: true,
“default”: true,
“forced”: true,
“codec”: “srt”,
“index”: 3,
“language”: “Français”,
“languageTag”: “fr”,
“languageCode”: “fra”,
“title”: “FORCED”,
“displayTitle”: “Français Forcé(e) (SRT)”,
“extendedDisplayTitle”: “FORCED (Français SRT)”
}

Here is a file that work correctly, only difference, wanted language is first.

Jul 16, 2022 15:43:20.480 [0x7feb32cd9b38] INFO - [Req#2fa8] [Plex for Samsung] [VVagnard:d9pu8xpm4gguh9900fm84m2x] [MDE] Application decision, directPlay: true, directStreamVideo: true, directStreamAudio: true
Jul 16, 2022 15:43:20.481 [0x7feb32cd9b38] INFO - [Req#2fa8] [Plex for Samsung] [VVagnard:d9pu8xpm4gguh9900fm84m2x] videoStream: {
“id”: 262237,
“streamType”: 1,
“default”: true,
“codec”: “h264”,
“index”: 0,
“bitrate”: 5079,
“bitDepth”: 8,
“chromaLocation”: “left”,
“chromaSubsampling”: “4:2:0”,
“codedHeight”: 800,
“codedWidth”: 1920,
“colorPrimaries”: “bt709”,
“colorRange”: “tv”,
“colorSpace”: “bt709”,
“colorTrc”: “bt709”,
“frameRate”: 24,
“hasScalingMatrix”: false,
“height”: 800,
“level”: 40,
“profile”: “high”,
“refFrames”: 4,
“scanType”: “progressive”,
“title”: “Star.Trek.Strange.New.Worlds.S01E08”,
“width”: 1920,
“displayTitle”: “1080p (H.264)”,
“extendedDisplayTitle”: “Star.Trek.Strange.New.Worlds.S01E08 (1080p H.264)”
}
Jul 16, 2022 15:43:20.481 [0x7feb32cd9b38] INFO - [Req#2fa8] [Plex for Samsung] [VVagnard:d9pu8xpm4gguh9900fm84m2x] audioStream: {
“id”: 262238,
“streamType”: 2,
“selected”: true,
“default”: true,
“codec”: “ac3”,
“index”: 1,
“channels”: 2,
“bitrate”: 192,
“language”: “Français”,
“languageTag”: “fr”,
“languageCode”: “fra”,
“audioChannelLayout”: “stereo”,
“samplingRate”: 48000,
“displayTitle”: “Français (AC3 Stereo)”,
“extendedDisplayTitle”: “Français (AC3 Stereo)”
}
Jul 16, 2022 15:43:20.481 [0x7feb32cd9b38] INFO - [Req#2fa8] [Plex for Samsung] [VVagnard:d9pu8xpm4gguh9900fm84m2x] subtitleStream: {
“id”: 262240,
“streamType”: 3,
“selected”: true,
“default”: true,
“forced”: true,
“codec”: “srt”,
“index”: 3,
“language”: “Français”,
“languageTag”: “fr”,
“languageCode”: “fra”,
“title”: “FORCED”,
“displayTitle”: “Français Forcé(e) (SRT)”,
“extendedDisplayTitle”: “FORCED (Français SRT)”
}

[VVagnard]

@sLumpy
Here is a 15 seconds sample
Star.Trek.Strange.New.Worlds.S01E07.zip (18.0 MB)

You must select the French language.

[sLumpy]

On 2021 Samsung TVs, audio track selection doesn’t work. We have to select the audio stream via the server so we have to remux. AC3 audio played over DASH that isn’t direct played also has issues with audio skipping, so it needs to be transcoded to AAC, so that’s why you’re seeing audio being transcoded here.

Do you have samples of the PCM or FLAC issues?

[VVagnard]

I see, that’s disappointing of Samsung. Have any idea if it’s a bug from the 2021 model or they just simply does not want to support that?
Also sometimes, when the audio is translated to AAC, its out of sync, I must go back or quit plex and resume to make it in sync again.

For the PCM and FLAC I’ll make you some sample soon.

Edit: here is the PCM sample. FLAC will follow later it’s a little bit more complicated for me to create the sample.
Within Temptation - Black Symphony.zip (28.7 MB)