I'm stumped, and could sure use some help and advice.
I'm having issues trying to direct play MKV files encoded with DTS 5.1 audio tracks. First, here's my setup:
Roku 3
Onkyo TX-SR505 AVR, which according to the owner's manual can process Dolby Digital EX and Dolby Pro Logic IIx, DTS, DTS-ES Matrix/Discrete, DTS Neo:6, DTS 96/24, and Linear PCM
- LG Electronics 47LV5400 television
- PMS running on a Dell Vostro 400 desktop machine
The Roku 3 is connected via HDMI cable to one of the receiver's two (yeah, it's an older model) HDMI inputs. The receiver is connected to the TV via HDMI output. In the Plex Roku channel's audio preferences I have 5.1 AC-3 Support and 5.1 DTS Support both enabled.
While I'm getting varying results depending on what movie file I'm playing, none of them result in the receiver indicating that the source file is DTS. This leads me to suspect that despite the receiver's support and my audio preferences, Plex is still transcoding the DTS audio into AC3. Here are two examples:
Example 1: For the following movie, I get no sound at all when using Direct Play. This movie only has a DTS audio track. Direct Stream/Transcode results in the receiver indicating that the source is PCM and the receiver displays "PLII Movie" as the listening mode. Even though DTS is the only audio track available in the file, DTS audio is not an available option when manually scrolling through the available listening modes on the receiver.
H:\Public\Shared Videos\Movies\The Magic Of Flight\The.Magic.of.Flight.1996.DOCU.1080p.BluRay.x264.DTS-FGT.mkv
General
Unique ID : 224186521982434803593355025021005728517 (0xA8A8C0EAB5EB399E931370AD57F00B05)
Complete name : H:\Public\Shared Videos\Movies\The Magic Of Flight\The.Magic.of.Flight.1996.DOCU.1080p.BluRay.x264.DTS-FGT.mkv
Format : Matroska
Format version : Version 2
File size : 3.55 GiB
Duration : 39mn 20s
Overall bit rate : 12.9 Mbps
Encoded date : UTC 2009-05-29 00:14:02
Writing application : mkvmerge v2.8.0 ('The Tree') built on May 14 2009 09:28:39
Writing library : libebml v0.7.7 + libmatroska v0.8.1
Video #1
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 : 39mn 20s
Bit rate : 11.4 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.230
Stream size : 3.07 GiB (86%)
Writing library : x264 core 67 r1153M 7b6ce6a
Encoding settings : cabac=1 / ref=5 / deblock=1:-3:-3 / analyse=0x3:0x113 / me=umh / subme=9 / psy_rd=0.8:0.8 / mixed_ref=1 / me_range=48 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-4 / threads=6 / nr=0 / decimate=0 / mbaff=0 / bframes=5 / b_pyramid=1 / b_adapt=2 / b_bias=0 / direct=3 / wpredb=1 / keyint=250 / keyint_min=25 / scenecut=40 / rc=2pass / bitrate=11410 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=1:0.80
Default : Yes
Forced : No
Audio #2
ID : 2
Format : DTS
Format/Info : Digital Theater Systems
Mode : 16
Format settings, Endianness : Big
Codec ID : A_DTS
Duration : 39mn 20s
Bit rate mode : Constant
Bit rate : 1 509 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Compression mode : Lossy
Stream size : 425 MiB (12%)
Default : Yes
Forced : Yes
Example 2: For the following movie, which has both DTS and Dolby AC3 5.1 audio tracks, it will work with Direct Play, but even if I select the DTS audio track in Playback Options the receiver still indicates that the source is Dolby Digital. Once again, DTS audio is not an available option when manually scrolling through the available listening modes on the receiver.
H:\Public\Shared Videos\Movies\IMAX Grand Canyon Adventure River At Risk\IMAX.Grand.Canyon.Adventure.River.At.Risk.2008.1080p.BluRay.x264-CLASSiC_ac3.mkv
General
Unique ID : 221001039535501148911385853834272296368 (0xA6434081A4E7BA24A5EA6A98A561CDB0)
Complete name : H:\Public\Shared Videos\Movies\IMAX Grand Canyon Adventure River At Risk\IMAX.Grand.Canyon.Adventure.River.At.Risk.2008.1080p.BluRay.x264-CLASSiC_ac3.mkv
Format : Matroska
Format version : Version 2
File size : 4.51 GiB
Duration : 44mn 37s
Overall bit rate : 14.5 Mbps
Encoded date : UTC 2015-07-11 19:55:59
Writing application : mkvmerge v4.4.0 ('Die Wiederkehr') built on Oct 31 2010 21:52:48
Writing library : libebml v1.0.0 + libmatroska v1.0.0
Video #1
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 44mn 37s
Bit rate : 12.5 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.252
Stream size : 3.81 GiB (84%)
Writing library : x264 core 67 r1153 7b6ce6a
Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=7 / psy_rd=1.0:0.0 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-2 / threads=6 / nr=0 / decimate=1 / mbaff=0 / bframes=3 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=1 / wpredb=1 / keyint=250 / keyint_min=25 / scenecut=40 / rc=2pass / bitrate=12520 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=1:1.00
Language : English
Default : Yes
Forced : No
Audio #3
ID : 3
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 44mn 37s
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 143 MiB (3%)
Language : English
Default : Yes
Forced : Yes
Audio #2
ID : 2
Format : DTS
Format/Info : Digital Theater Systems
Mode : 16
Format settings, Endianness : Big
Codec ID : A_DTS
Duration : 44mn 37s
Bit rate mode : Constant
Bit rate : 1 509 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 482 MiB (10%)
Language : English
Default : No
Forced : No
Any advice or suggestions on what I'm doing wrong? Thanks in advance!