Problems with DTS passthrough

[schmidex]

Hi.

First of all I really enjoy xbmc on my pivos xios. But I came across a major issue which made it nearly unusable for me: The audio isn't working on some of my HD movies with DTS Audio streams. Oddly enough this doesn't affect all of my DTS movies. Most of them are playing fine.
My XIOS is connected to a AV-Reciver which decodes the Audiostream so xbmc only passes the stream through.

I cut a sample of one of the movies which non working audio. Maybe this can help to track down the problem.
http://dl.dropbox.com/u/61623618/avatar ... sample.mkv

Thanks for help

[Pivos_BigC]

Run the original movie through mediainfo and paste the results.

[funkypigeon]

I have the same problem with some of my DTS rips using 24th August 2012 build. In fact, the second time I played I had sound. But after skipping through, sound was lost again. Now I don't get sound at all on the file

I also noticed that "Resume from..." is missing on these files. Playback on some of my other DTS rips work fine.

I have enabled DTS/AC3 in XBMC settings. I am using HDMI to Onkyo 609 receiver.

Here is one for you:

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings, CABAC : Yes
Format settings, ReFrames : 5 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 50mn 35s
Bit rate : 4 433 Kbps
Width : 1 200 pixels
Height : 900 pixels
Display aspect ratio : 4:3
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) : 0.171
Stream size : 1.57 GiB (84%)
Writing library : x264 core 78 r1310 ec46ace
Encoding settings : cabac=1 / ref=5 / deblock=1:-1:-1 / analyse=0x3:0x113 / me=umh / subme=7 / psy=1 / psy_rd=1.0:0.0 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=1 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-2 / threads=6 / nr=0 / decimate=1 / mbaff=0 / constrained_intra=0 / bframes=3 / b_pyramid=0 / b_adapt=1 / b_bias=0 / direct=3 / wpredb=1 / keyint=240 / keyint_min=24 / scenecut=40 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=19.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / vbv_maxrate=50000 / vbv_bufsize=50000 / ip_ratio=1.40 / aq=1:1.00
Language : English
Default : No
Forced : No

Audio
ID : 2
Format : DTS
Format/Info : Digital Theater Systems
Codec ID : A_DTS
Duration : 50mn 35s
Bit rate mode : Constant
Bit rate : 755 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 : 273 MiB (14%)
Language : English
Default : Yes
Forced : No

[schmidex]

Here is the mediainfo log for one of the movies with no working DTS Sound:

Code: Select all

General
Unique ID                                : 173066003805243695008921585949537188685 (0x82334CC6CBEE191F1199208E8AA7BB4D)
Complete name                            : V:\filme\hd\d-avatarext-1080p.mkv
Format                                   : Matroska
Format version                           : Version 2
File size                                : 11.5 GiB
Duration                                 : 2h 58mn
Overall bit rate                         : 9 250 Kbps
Movie name                               : Avatar Aufbruch nach Pandora
Encoded date                             : UTC 2010-11-19 08:14:18
Writing application                      : mkvmerge v4.4.0 ('Die Wiederkehr') gebaut am Oct 31 2010 18:15:05
Writing library                          : libebml v1.0.0 + libmatroska v1.0.0

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : [email protected]
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 4 frames
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 2h 58mn
Bit rate                                 : 8 312 Kbps
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)                       : 0.167
Stream size                              : 10.3 GiB (90%)
Title                                    : Avatar Aufbruch nach Pandora
Writing library                          : x264 core 107 r1772 c9dad9e
Encoding settings                        : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x133 / 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=6 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / 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=crf / mbtree=1 / crf=20.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / aq=1:0.00
Default                                  : Yes
Forced                                   : No

Audio
ID                                       : 2
Format                                   : DTS
Format/Info                              : Digital Theater Systems
Codec ID                                 : A_DTS
Duration                                 : 2h 58mn
Bit rate mode                            : Constant
Bit rate                                 : 755 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                              : 961 MiB (8%)
Title                                    : DTS
Language                                 : German
Default                                  : Yes
Forced                                   : No

Text
ID                                       : 3
Format                                   : UTF-8
Codec ID                                 : S_TEXT/UTF8
Codec ID/Info                            : UTF-8 Plain Text
Title                                    : Forced Subs
Language                                 : German
Default                                  : Yes
Forced                                   : No


[emveepee]

I saw an update to the git removing 24 bit audio that is newer than the current version. Seeing as both those samples are 24 bit I wonder if this is somehow related?

Martin

[davilla]

I saw an update to the git removing 24 bit audio that is newer than the current version. Seeing as both those samples are 24 bit I wonder if this is somehow related?

Martin

Unrelated.

[schmidex]

I successfully tracked down the problem. DTS Passthrough don't work for audio Streams with a bitrate of 755kbps.
1510 kbps works flawlessly.

Can anyone confirm my findings?
Is this problem difficult to fix?

[funkypigeon]

I successfully tracked down the problem. DTS Passthrough don't work for audio Streams with a bitrate of 755kbps.
1510 kbps works flawlessly.

Can anyone confirm my findings?
Is this problem difficult to fix?

Yep same problem with 7th September build. Problem is I actually get sound on the first file I play but none after that.

[luckyknight]

I've confirmed that the problem still exists on 100912 build.