Nexus doesn't seem to support DTS-HD Master Audio using the .m2ts file extension

**blueribb** · February 1, 2023 at 9:40 PM

I have 2 Intel NUCs running LE 10.0.4 and they play all my .m2ts video files containing DTS-HD Master Audio correctly. Their Audio Streams are identified as: English - DTS-HD MA 5.1 (side) - 6 channels [default] (1/1). My AVR correctly identifies them as DTS-HD Master Audio

If I update to 10.95.0 (Nexus), the Audio Streams are identified as: English - DTS 0 channels - 0 channels (1/1). My AVR plays them as plain DTS - not DTS-HD Master Audio

Same problem running Kodi Nexus on a Windows 10 computer.

I converted one of the .m2ts files to .mkv and it plays DTS-HD Master Audio correctly.

Can anyone else confirm this?

**blueribb** · February 3, 2023 at 2:47 PM

Here's a link to a sample .m2ts video file that contains DTS-HD Master Audio:

Samples - Official Kodi Wiki

Scroll down to HD / object-based Audio Test Clips and select number 14 to download.

It will play properly with LE 10.0.4 (Matrix) but not with LE 10.95.0 (Nexus). The AVR should display "DTS-HD Master Audio"

**HiassofT** · February 3, 2023 at 4:49 PM

This seems to be a kodi bug, might be best to report it on kodi forums or kodi's github.

ffprobe reports the audio stream of DTS-HD MA 7.1 'Dredd' Sound Check.m2ts as DTS-HD-MA

Code

Input #0, mpegts, from 'kodi/DTS-HD MA 7.1 'Dredd' Sound Check.m2ts':
  Duration: 00:01:27.91, start: 11.650667, bitrate: 25283 kb/s
  Program 1 
  Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 90k tbn
  Stream #0:1[0x1100]: Audio: dts (DTS-HD MA) ([134][0][0][0] / 0x0086), 48000 Hz, 7.1, s32p (24 bit)

But kodi reports just dts and seems to choose the DTS core stream

Code

2023-02-03 16:39:05.885 T:1180     info <general>: ffmpeg[0x3807b58]: Input #0, mpegts, from 'smb://lebuild.lan/samples/kodi/DTS-HD MA 7.1 'Dredd' Sound Check.m2ts':
2023-02-03 16:39:05.885 T:1180     info <general>: ffmpeg[0x3807b58]:   Duration: 00:01:27.91, bitrate: N/A
2023-02-03 16:39:05.885 T:1180     info <general>: ffmpeg[0x3807b58]:   Program 1 
2023-02-03 16:39:05.885 T:1180     info <general>: ffmpeg[0x3807b58]:   Stream #0:0[0x1011]: Video: h264 (HDMV / 0x564D4448), none, 1920x1080, 90k tbn
2023-02-03 16:39:05.885 T:1180     info <general>: ffmpeg[0x3807b58]:   Stream #0:1[0x1100]: Audio: dts ([134][0][0][0] / 0x0086), 0 channels
...
2023-02-03 16:39:05.952 T:1183     info <general>: CAEStreamParser::SyncDTS - dtsHD (core) stream detected (6 channels, 48000Hz, 16bit BE, period: 512, syncword: 0x41a29547, target rate: 0x18, framesize 2128))

so long,

Hias

**blueribb** · February 3, 2023 at 4:56 PM

Thanks for confirming the bug. I posted this on the Kodi Forums this morning but there have been no replies (yet).

Update: I just submitted the bug to Kodi Github

**blueribb** · March 6, 2023 at 9:47 PM

A month has passed and not 1 response from Kodi Forums or Github on this issue.

**blueribb** · March 12, 2023 at 11:16 PM

Update: Member SMB / SMB1 had uploaded a devel version of LE and it fixed (patched?) the issue. I'm not sure if it's a fix or a work-around, but it fixed my issue.

LibreELEC-Generic.x86_64-11.0-devel-20230312034621-84d83d1.img.gz

**HiassofT** · March 12, 2023 at 11:45 PM

Please test with the latest LE11 nightly build (20230312) from here:
https://test.libreelec.tv/11.0/

They include a kodi update to 20.1-Nexus with several HD audio fixes.

Beware though that wifi may be broken, that's a known issue that will be fixed in future nighlies - and the upcoming LE 11.0.1 release.

so long,

Hias

**smp** · March 13, 2023 at 12:52 AM

It is broken in 20.1 and master. Removing this part of the code fixes it:

Diff

diff --git a/xbmc/cores/VideoPlayer/DVDDemuxers/DVDDemuxFFmpeg.cpp b/xbmc/cores/VideoPlayer/DVDDemuxers/DVDDemuxFFmpeg.cpp
index bc6b54c..7f58204 100644
--- a/xbmc/cores/VideoPlayer/DVDDemuxers/DVDDemuxFFmpeg.cpp
+++ b/xbmc/cores/VideoPlayer/DVDDemuxers/DVDDemuxFFmpeg.cpp
@@ -525,23 +525,6 @@ bool CDVDDemuxFFmpeg::Open(const std::shared_ptr<CDVDInputStream>& pInput, bool
                          "empty. Please report this bug.");
   }
 
-  // don't re-open mpegts streams with hevc encoding as the params are not correctly detected again
-  if (iformat && (strcmp(iformat->name, "mpegts") == 0) && !fileinfo && !isBluray &&
-      m_pFormatContext->nb_streams > 0 && m_pFormatContext->streams != nullptr &&
-      m_pFormatContext->streams[0]->codecpar->codec_id != AV_CODEC_ID_HEVC)
-  {
-    av_opt_set_int(m_pFormatContext, "analyzeduration", 500000, 0);
-    m_checkTransportStream = true;
-    skipCreateStreams = true;
-  }
-  else if (!iformat || ((strcmp(iformat->name, "mpegts") != 0) ||
-                        ((strcmp(iformat->name, "mpegts") == 0) &&
-                         m_pFormatContext->nb_streams > 0 && m_pFormatContext->streams != nullptr &&
-                         m_pFormatContext->streams[0]->codecpar->codec_id == AV_CODEC_ID_HEVC)))
-  {
-    m_streaminfo = true;
-  }
-
   // we need to know if this is matroska, avi or sup later
   m_bMatroska = strncmp(m_pFormatContext->iformat->name, "matroska", 8) == 0;    // for "matroska.webm"
   m_bAVI = strcmp(m_pFormatContext->iformat->name, "avi") == 0;`

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