Author Topic: BUG 1.01.02 - MKV/AAC-5.1  (Read 2751 times)

April 20, 2009, 09:53:05 AM
Read 2751 times

paludan

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Searched the forum for a while and i was unable to find anything about this matter :P - sorry if its here allready.

I downloaded a Terminator 4 trailer from Apples site.
And wanted to play it on my WDTV - but no sound to hear.
After surfing the net for a while i found out, if i changed the audio output then i would be able to play it (in only stereo tho).

Code: [Select]
General
Complete name                    : H:\Lamerting\terminatorsalvation-tlr2_h1080p.mov
Format                           : MPEG-4
Format profile                   : QuickTime
Codec ID                         : qt 
File size                        : 139 MiB
Duration                         : 2mn 6s
Overall bit rate                 : 9 268 Kbps
Movie name                       : Terminator Salvation
Movie name/More                  : In theaters 2008
Encoded date                     : UTC 2008-12-09 23:48:02
Tagged date                      : UTC 2008-12-09 23:48:08
Writing library                  : Apple QuickTime
Original source medium           : 001
Copyright                        : © 2008 Warner Bros. Pictures. All Rights Reserved
Comment                          : Encoded and delivered by apple.com/trailers/

Video
ID                               : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : Main@L4.0
Format settings, CABAC           : No
Format settings, ReFrames        : 2 frames
Codec ID                         : avc1
Codec ID/Info                    : Advanced Video Coding
Duration                         : 2mn 6s
Bit rate mode                    : Variable
Bit rate                         : 8 805 Kbps
Width                            : 1 920 pixels
Height                           : 800 pixels
Display aspect ratio             : 2.400
Frame rate mode                  : Constant
Frame rate                       : 23.976 fps
Resolution                       : 24 bits
Colorimetry                      : 4:2:0
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.239
Stream size                      : 132 MiB (95%)
Encoded date                     : UTC 2008-12-09 18:01:41
Tagged date                      : UTC 2008-12-09 23:48:08

Audio
ID                               : 2
Format                           : AAC
Format/Info                      : Advanced Audio Codec
Format version                   : Version 4
Format profile                   : LC
Format settings, SBR             : No
Codec ID                         : 40
Duration                         : 2mn 6s
Bit rate mode                    : Constant
Bit rate                         : 459 Kbps
Nominal bit rate                 : 448 Kbps
Channel(s)                       : 6 channels
Channel positions                : Front: L C R, Rear: L R, LFE
Sampling rate                    : 48.0 KHz
Resolution                       : 16 bits
Stream size                      : 6.91 MiB (5%)
Encoded date                     : UTC 2008-12-09 18:01:42
Tagged date                      : UTC 2008-12-09 23:48:08

April 20, 2009, 09:56:09 AM
Reply #1

high_definitely

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So what is your bug report? Multi-channel AAC audio streams won't be decoded to multi-channel PCM, only downmixed to stereo. This is a known limitation of the device, no bug.

April 20, 2009, 10:18:14 AM
Reply #2

paludan

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Lets call it "a hope for a fix" then.

April 21, 2009, 06:46:24 PM
Reply #3

shemilio

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So what is your bug report? Multi-channel AAC audio streams won't be decoded to multi-channel PCM, only downmixed to stereo. This is a known limitation of the device, no bug.

Actually User Manual Page 6 says that AAC is supported with the following Note:

*2-channel only. 2+channel signal is sent via digital pass through to a receiver. Manufactured under license from Dolby Laboratories. “Dolby” and the double-D symbol are trademarks of Dolby Laboratories.

From my point of view it's something to be fixed and up to now I agree to call it undesired limitation or bug.

December 24, 2009, 03:47:15 AM
Reply #4

powerstick

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December 29, 2009, 04:01:51 AM
Reply #5

Pangadaywalker

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I still don't understand the bug. You want to transfer AAC to a receiver? No receivers decodes AAC. At least not 99% of the ones I know.

WDTV will downmix it to stereo and that is it. There is no bug on that.

Cheers.
My set: