8 replies to this topic

[Robinson]

I have downloaded some MKV files but there is no sound on my HD51. Of course, there is sound on my computer.

Is this perhaps due to 6 channel audio?

General
Unique ID                      : 230753198201236050248980811109169861528 (0xAD99730D0CFCA3CEA328C80B91F39398)
Complete name                  : C:\Users\Robert\Downloads\Space.1999.S01.1080p.BluRay.x264-aAF[rartv]\space.1999.s01e01.1080p.bluray.x264-aaf.mkv
Format                         : Matroska
Format version                 : Version 2
File size                      : 3.28 GiB
Duration                       : 52 min 7 s
Overall bit rate               : 9 004 kb/s
Encoded date                   : UTC 2012-01-10 16:56:01
Writing application            : mkvmerge v5.2.1 ('A Far Off Place') built on Jan  2 2012 23:21:10
Writing library                : libebml v1.2.3 + libmatroska v1.3.0

Video
ID                             : 1
Format                         : AVC
Format/Info                    : Advanced Video Codec
Format profile                 : High@L4.1
Format settings                : CABAC / 4 Ref Frames
Format settings, CABAC         : Yes
Format settings, ReFrames      : 4 frames
Codec ID                       : V_MPEG4/ISO/AVC
Duration                       : 52 min 8 s
Bit rate                       : 8 251 kb/s
Width                          : 1 440 pixels
Height                         : 1 080 pixels
Display aspect ratio           : 4:3
Frame rate mode                : Constant
Frame rate                     : 24.000 FPS
Color space                    : YUV
Chroma subsampling             : 4:2:0
Bit depth                      : 8 bits
Scan type                      : Progressive
Bits/(Pixel*Frame)             : 0.221
Stream size                    : 2.94 GiB (90%)
Writing library                : x264 core 120 r2120 0c7dab9
Encoding settings              : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=8 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=16 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=2pass / mbtree=1 / bitrate=8251 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Language                       : English
Default                        : Yes
Forced                         : No

Audio
ID                             : 2
Format                         : DTS
Format/Info                    : Digital Theater Systems
Codec ID                       : A_DTS
Duration                       : 52 min 7 s
Bit rate mode                  : Constant
Bit rate                       : 755 kb/s
Channel(s)                     : 6 channels
Channel layout                 : C L R Ls Rs LFE
Sampling rate                  : 48.0 kHz
Frame rate                     : 93.750 FPS (512 SPF)
Bit depth                      : 24 bits
Compression mode               : Lossy
Stream size                    : 281 MiB (8%)
Default                        : Yes
Forced                         : No

Menu
00:00:00.000                   : en:00:00:00.000
00:05:03.208                   : en:00:05:03.208
00:09:32.875                   : en:00:09:32.875
00:16:56.833                   : en:00:16:56.833
00:22:23.042                   : en:00:22:23.042
00:25:39.458                   : en:00:25:39.458
00:30:09.417                   : en:00:30:09.417
00:34:47.750                   : en:00:34:47.750
00:41:27.792                   : en:00:41:27.792
00:45:38.958                   : en:00:45:38.958
00:51:35.833                   : en:00:51:35.833

If so, does the file need conversion / re-encoding?

If so, what is a simple tool to do that?

Thank you.

 

[WanWizard]

No support for DTS tracks perhaps?

[betacentauri]

Downmix on or off? Try off if your AV receiver or TV supports DTS.

[Robinson]

I have no support for DTS and so downmix is always on.

Audio from this movie, however, plays fine:

General
Unique ID                      : 180547529181001945037060213464993625750 (0x87D43074E1DCD3F397F541DFB6B7F696)
Complete name                  : F:\Tory\Space.1999.S02.1080p.BluRay.x264-MIXED[rartv]\space.1999.S02E01.REMASTERED.1080p.BluRay.x264-GUACAMOLE.mkv
Format                         : Matroska
Format version                 : Version 4
File size                      : 3.28 GiB
Duration                       : 48 min 58 s
Overall bit rate               : 9 582 kb/s
Encoded date                   : UTC 2016-02-27 00:26:51
Writing application            : mkvmerge v8.2.0 ('World of Adventure') 64bit
Writing library                : libebml v1.3.1 + libmatroska v1.4.2

Video
ID                             : 1
Format                         : AVC
Format/Info                    : Advanced Video Codec
Format profile                 : High@L4.1
Format settings                : CABAC / 4 Ref Frames
Format settings, CABAC         : Yes
Format settings, ReFrames      : 4 frames
Codec ID                       : V_MPEG4/ISO/AVC
Duration                       : 48 min 57 s
Bit rate                       : 8 073 kb/s
Width                          : 1 440 pixels
Height                         : 1 080 pixels
Display aspect ratio           : 4:3
Frame rate mode                : Constant
Frame rate                     : 25.000 FPS
Color space                    : YUV
Chroma subsampling             : 4:2:0
Bit depth                      : 8 bits
Scan type                      : Progressive
Bits/(Pixel*Frame)             : 0.208
Stream size                    : 2.76 GiB (84%)
Writing library                : x264 core 148 r2665 a01e339
Encoding settings              : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x113 / me=umh / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=12 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=2pass / mbtree=1 / bitrate=8073 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Default                        : Yes
Forced                         : No

Audio
ID                             : 2
Format                         : DTS
Format/Info                    : Digital Theater Systems
Codec ID                       : A_DTS
Duration                       : 48 min 58 s
Bit rate mode                  : Constant
Bit rate                       : 1 509 kb/s
Channel(s)                     : 2 channels
Channel layout                 : L R
Sampling rate                  : 48.0 kHz
Frame rate                     : 93.750 FPS (512 SPF)
Bit depth                      : 24 bits
Compression mode               : Lossy
Stream size                    : 529 MiB (16%)
Language                       : English
Default                        : Yes
Forced                         : No

 

[betacentauri]

I think vendor needs DTS license for downmix. And most probably they don’t want to pay for it.

[betacentauri]

Your 2. sample has only 2 channel audio. Maybe that is the difference.

[Pike_Bishop]

Hi,

 

 

If so, does the file need conversion / re-encoding?

If so, what is a simple tool to do that?

 

try to demux the file with mkv extract from MKV ToolNix (better you use a gui for it as example gMKVExtractGUI);

https://mkvtoolnix.download/

https://sourceforge....gmkvextractgui/

then you can convert the dts audio to ac3 audio with XMedia Recode;

https://www.xmedia-recode.de/

and as last mux the video with the new ac3 audio with MKV ToolNix (MKVToolNix GUI)

 

this complete job needs only  a few minutes.

Edited by Pike_Bishop, 23 February 2020 - 18:24.

[Robinson]

Your 2. sample has only 2 channel audio. Maybe that is the difference.

Yes, I noticed that too.

 

Pike_Bishop, OK, I will try to use it unless there is a quicker way to change 5.1 to L/R only.

[Pike_Bishop]

you can leave it on channel 5.1 if you convert it to ac3 audio, the box can play it.