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DTS mono no sound? Setting suggestions

funny works on iOS and VLC
Well I Downloaded Vacation (1983) DTS MONO, video fine no audio on plex? the audio plays fine with Ios and vlc any suggestions. Thanks.

Comments

  • droogdroog Posts: 59Members
    Same problem here.., wish a developer would respond to this! =)
  • Chris CChris C Plex Employee Posts: 11,644Members, Plex Employee, Plex Pass, Plex Ninja Plex Employee
    How about using the MediaInfo app to check all the settings of the video file and post them here? Also, what settings do you have in Plex for Preferences > System > Audio?

    (Incidentally, "DTS Mono" doesn't even make any sense. DTS is a surround standard and thus by definition should have more than one channel...)
  • gmhgmh Posts: 38Members
    I have also come across a couple of films with DTS mono audio. I can't remember what they are right now. But I do know that when I tried to play them in Plex just on my computer I got no audio. However, when I watched them on my TV with audio running through my AV receiver they played just fine.
  • onekmilesbehindonekmilesbehind Posts: 24Members, Plex Pass Plex Pass
    Chris C wrote:

    (Incidentally, "DTS Mono" doesn't even make any sense. DTS is a surround standard and thus by definition should have more than one channel...)


    You'd think so, but it depends on how the video was originally shot, and what the audio engineer employed during the transfer. DTS supports old-school mono all the way up to more advanced 7.1+ encapsulation. I've got a few movies with DTS-Mono tracks in my collection

    http://www.blu-ray.com/movies/National-Lampoons-Vacation-Blu-ray/8883/

    http://www.blu-ray.com/movies/National-Lampoons-European-Vacation-Blu-ray/8884/

    DTS Mono may seem weird, but I think we'd all agree DTS-HD MA Mono is weirder. Either way, to get back to topic, I've had no issues with DTS-mono playback in Plex, but I also use an external receiver. Have you tried remuxing the audio/video streams for the troublesome movies? It's just a thought, but maybe there's an issue with parsing header data or something along those lines that causes the internal audio to fail playback? Maybe someone else can chime in with a solution.
  • droogdroog Posts: 59Members
    Chris C wrote:

    How about using the MediaInfo app to check all the settings of the video file and post them here? Also, what settings do you have in Plex for Preferences > System > Audio?

    (Incidentally, "DTS Mono" doesn't even make any sense. DTS is a surround standard and thus by definition should have more than one channel...)



    Here is the info you requested:

    General
    Complete name : /Volumes/Movies/Encoded/720/Vacation (1983).mkv
    Format : Matroska
    File size : 4.37 GiB
    Duration : 1h 38mn
    Overall bit rate : 6 362 Kbps
    Encoded date : UTC 2010-08-15 06:07:33
    Writing application : mkvmerge v3.3.0 ('Language') built on Mar 24 2010 14:59:24
    Writing library : libebml v0.8.0 + libmatroska v0.9.0

    Video
    ID : 1
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : High@L4.1
    Format settings, CABAC : Yes
    Format settings, ReFrames : 5 frames
    Codec ID : V_MPEG4/ISO/AVC
    Duration : 1h 38mn
    Bit rate : 5 594 Kbps
    Width : 1 280 pixels
    Height : 720 pixels
    Display aspect ratio : 16:9
    Frame rate : 23.976 fps
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.253
    Stream size : 3.76 GiB (86%)
    Writing library : x264 core 104 r1677 19df41a
    Encoding settings : cabac=1 / ref=5 / deblock=1:-1:-1 / 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=1 / chroma_qp_offset=-2 / threads=12 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=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=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=5594 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=50000 / vbv_bufsize=50000 / ip_ratio=1.40 / aq=1:1.00 / nal_hrd=none
    Language : English

    Audio
    ID : 2
    Format : DTS
    Format/Info : Digital Theater Systems
    Codec ID : A_DTS
    Duration : 1h 38mn
    Bit rate mode : Constant
    Bit rate : 754 Kbps
    Channel(s) : 1 channel
    Channel positions : Mono
    Sampling rate : 48.0 KHz
    Bit depth : 24 bits
    Stream size : 531 MiB (12%)
    Language : English



    Plex Audio Settings:
    digital output support - autodetect
    mixdown volume boost - disabled
    normalize film volume - disabled
    link system output device - enabled
    link system volume - enabled
  • droogdroog Posts: 59Members
    iveldie wrote:



    can we stay on topic please.
  • droogdroog Posts: 59Members
    bump
  • boots2xboots2x IP Challenged Ninja Posts: 1,184Members, Plex Pass, Plex Ninja Plex Ninja
    droog wrote:

    bump

    Try turning Plex Preferences > System >Audio > Auto-detect to OFF and DTS Capable Receiver to OFF

    James
  • droogdroog Posts: 59Members
    I already have all of that disabled... and digital output support is either "autodetect" or "force digital". My Mini audio output is connected directly to my TV. More suggestions?
  • boots2xboots2x IP Challenged Ninja Posts: 1,184Members, Plex Pass, Plex Ninja Plex Ninja
    droog wrote:

    I already have all of that disabled... and digital output support is either "autodetect" or "force digital". My Mini audio output is connected directly to my TV. More suggestions?

    Hmm... sorry no. I don't have any shows with this track so I can't test either. The only thing I can suggest is a re-encode in Handbrake and down-mix to "Stereo"

    James
  • droogdroog Posts: 59Members
    Hopefully a developer will come along and see this post and make a fix for it. It is Plex that does not seem to support DTS Mono. There is nothing wrong with the video itself. It is a Blu-Ray mkv of the movie Vacation. I checked the audio tech details on the Blu-Ray version and the original source is DTS Mono. The movies audio plays back just fine in VLC and other movie playback software i have checked, however Plex has a problem with its audio.
  • boots2xboots2x IP Challenged Ninja Posts: 1,184Members, Plex Pass, Plex Ninja Plex Ninja
    droog wrote:

    Hopefully a developer will come along and see this post and make a fix for it. It is Plex that does not seem to support DTS Mono. There is nothing wrong with the video itself. It is a Blu-Ray mkv of the movie Vacation. I checked the audio tech details on the Blu-Ray version and the original source is DTS Mono. The movies audio plays back just fine in VLC and other movie playback software i have checked, however Plex has a problem with its audio.

    I checked in with the guys and they tell me that it's not likely to be addressed in the short to medium term... their plates are full! If you really want to play this file with Plex, the only way will be to re-code the audio track. Sorry!

    James
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