Codecs TrueHD as 5.1/DTS (1 Viewer)

[Jay_UK]

Hi there,

I know there have been loads and loads of posts about this (believe me, I have searched and read most), but I am still unsure/puzzled.

I am trying to play bluray rips (using the bluray handler) which contain TrueHD on my 5.1/DTS (no HD audio) amp via spdif (no bitstreaming).

I have SAF5 installed.

I have read about registering new decoders, changing codecs, etc...

Can anyone summarise/simply put what needs to be done (without breaking any other playback/support) to allow me to achieve playback of my blurays (which also contain 5.1) on my old non HD amp.

I have attached a screen capture of graphstudio... notice the missing audio!

Thanks,

J.

 

[jameson_uk]

I am trying to play bluray rips (using the bluray handler) which contain TrueHD on my 5.1/DTS (no HD audio) amp via spdif (no bitstreaming).

SPDIF will only carry stereo or DD/DTS so TrueHD gets a little messy

DTS-HD is nice and simple in that it is always contains a DTS core so if you play a disc with a DTS-HD it will just output the DTS core.

TrueHD however does not necessarily have a DD core track (what should happen is that the TrueHD and DD shoudl be separate tracks) What does happen however in some audio tracks is that a DD track has been interlaced into the TrueHD track (so you actually have two tracks which appear as one). The theory here is that if your player does not know what to do with the TrueHD track it will only see the standard DD track and ignore the other bit)

So to answer your question, it depends on what type of TrueHD the disc has. If it has this interlaced DD track then I think this should work as normal. If it only contains a TrueHD track (which will have to have been an rip with some stuff removed as it must have one of the mandatory codecs) then you need to do something to decode the output and then re-encode to DD

Using a recent FFDShow tryout you will need to set the options to decode TrueHD and then set the options to encode audio to DD

 

[Jay_UK]

Hi there,

Thanks for responding - and explaining that (I never knew about the "backward" compatibility).

So in theory (depending on the format) I should be able to passthru the TrueHD and my receiver will trying and pay the none HD part of the track.

I have tried enabling TrueHD passthru, disabling passhtru, different codecs, etc, but I can not get the source to connect to an audio decoder

Is it a problem with the MPEG splitter?

This is the output from MediaInfo (for the m2ts file):

General
ID : 0 (0x0)
Complete name : D:\BDMV\STREAM\00011.m2ts
Format : BDAV
Format/Info : Blu-ray Video
File size : 37.7 GiB
Duration : 2h 54mn
Overall bit rate : 30.9 Mbps
Maximum Overall bit rate : 48.0 Mbps

Video #1
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 2 frames
Codec ID : 27
Duration : 2h 54mn
Bit rate mode : Variable
Width : 1 920 pixels
Height : 1 080 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

Video #2
ID : 6912 (0x1B00)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.2
Format settings, CABAC : Yes
Format settings, ReFrames : 2 frames
Codec ID : 27
Duration : 2h 54mn
Bit rate mode : Variable
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive

Audio #1
ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Format profile : TrueHD / Core
Mode extension : CM (complete main)
Muxing mode : Stream extension
Codec ID : 131
Duration : 2h 54mn
Bit rate mode : Variable / Constant
Bit rate : Unknown / 448 Kbps
Maximum bit rate : 2 871 Kbps / 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 : Lossless / Lossy

Audio #2
ID : 4353 (0x1101)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Format profile : Dolby Digital
Mode extension : CM (complete main)
Codec ID : 129
Duration : 2h 54mn
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 240 MiB (1%)

Audio #3
ID : 6656 (0x1A00)
Menu ID : 1 (0x1)
Format : DTS
Format/Info : Digital Theater Systems
Format profile : Express
Codec ID : 162
Duration : 2h 54mn
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Compression mode : Lossy
Stream size : 240 MiB (1%)

Text #1
ID : 4608 (0x1200)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144

Text #2
ID : 4609 (0x1201)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144

Text #3
ID : 4610 (0x1202)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144

Text #4
ID : 4611 (0x1203)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144

Text #5
ID : 4612 (0x1204)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144

Text #6
ID : 4613 (0x1205)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144

Text #7
ID : 4614 (0x1206)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144

Text #8
ID : 4615 (0x1207)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144

Text #9
ID : 4616 (0x1208)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144

Text #10
ID : 4617 (0x1209)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144
Delay relative to video : 1s 1ms

Text #11
ID : 4618 (0x120A)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144
Delay relative to video : 1s 1ms

Text #12
ID : 4619 (0x120B)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144
Delay relative to video : 1s 1ms

Text #13
ID : 4620 (0x120C)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144
Delay relative to video : 1s 1ms

Text #14
ID : 4621 (0x120D)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144
Delay relative to video : 1s 1ms

Text #15
ID : 4622 (0x120E)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144
Delay relative to video : 1s 1ms

Text #16
ID : 4623 (0x120F)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144
Delay relative to video : 1s 1ms


Many thanks,

J.