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Product Support => HiMedia Q10 Pro, Q5 Pro => Topic started by: Meng on November 11, 2016, 04:13:04 AM

Title: Audio issue aac7.1
Post by: Meng on November 11, 2016, 04:13:04 AM: Hi sir, currently im using himedia q5 pro, with firmware 1.0.8.
When i played movie hevc x26510bits audio aac7.1 with kodi/media center there is none audio coming out.

Please advice, thanks a lot
Title: Re: Audio issue aac7.1
Post by: dorol on November 17, 2016, 07:48:18 AM: Same here. :)
Title: Re: Audio issue aac7.1
Post by: Meng on November 17, 2016, 09:25:53 AM: I guess noone interested in aac 7.1 except us ;D
Title: Re: Audio issue aac7.1
Post by: futeko.com on November 17, 2016, 09:48:48 AM: Can you point me to a 7.1 channel AAC sample?
Title: Re: Audio issue aac7.1
Post by: dorol on November 17, 2016, 04:15:43 PM: Hi, Futeko.
Here is 15 mb sample
http://www13.zippyshare.com/v/wg3E0VEg/file.html
Just download.
Thanks.
Title: Re: Audio issue aac7.1
Post by: futeko.com on November 18, 2016, 09:14:40 AM: Quote from: dorol on November 17, 2016, 04:15:43 PM
Hi, Futeko.
Here is 15 mb sample
Just download.
Thanks.

I downloaded the video but that link you posted has lots of malware links so I've removed it.
Title: Re: Audio issue aac7.1
Post by: futeko.com on November 18, 2016, 09:31:52 AM: Mediainfo reports that sample as 2 channel:

ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : HE-AAC / LC
Codec ID : 40
Duration : 57s 886ms
Bit rate mode : Constant
Bit rate : 64.0 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 KHz / 22.05 KHz
Compression mode : Lossy
Stream size : 452 KiB (5%)
Language : English

It plays using testing Q5 Pro as 2 channel PCM.
Title: Re: Audio issue aac7.1
Post by: dorol on November 18, 2016, 03:51:44 PM: On PC - KMPlayer reports sample like this
Sample AAC 7.1.mkv
Audio #2
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : A_AAC
Duration : 57s 779ms
Channel(s) : 8 channels
Channel positions : Front: L C R, Side: 4, LFE
Sampling rate : 48.0 KHz
Compression mode : Lossy
Delay relative to video : 8ms
Language : English
Default : Yes
Forced : No

So no chance for AAC 7.1 working on Q10 Pro?
Title: Re: Audio issue aac7.1
Post by: pcristi on November 18, 2016, 04:15:45 PM: Same topic Mkv+ flac 7.1
http://www.futeko.com/newforum/index.php?topic=984.0

Quote from: futeko.com on June 24, 2016, 09:26:57 AM
It would appear to be a bug.

7.1 FLAC in MKV works when there is more than one audio track, but not when it's on its own.
Quote from: Phil181 on June 24, 2016, 04:17:10 PM
Quote from: pcristi on June 24, 2016, 12:45:55 AM
@onyxx1995,@Phil181...
Add a 2nd audio track, and let as to know if FLAC 7.1 is passthrough Multi Ch 7.1
I grabbed a sample TrueHD 7.1 file of my own (from The Art of Flight) and used mkv AudioConverter to convert to 7.1 FLAC.
MediaInfo confirmed it was 7.1 FLAC audio in the file.

On my system, the Q10 Pro only passed through audio as 2.0 PCM.
I checked with my trusty old WD TV StreamingMediaPlayer (which is still running side-by-side). It passed the 7.1 FLAC audio with no problems using the same mkv file!!

I re-tested my own FLAC 5.1 192KHz tracks extracted from Pure Audio Blu-ray (Beck's Sea Change) and they passed through perfectly fine as 5.1 as before.

I then extracted the 7.1 FLAC audio track (using MKVExtract GUI2) and remuxed back into the original clip with 7.1 TrueHD. i.e. ended up with an mkv with 2x 7.1 audio tracks (as requested by @pcristi).

VERY STRANGE! Both 7.1 audio tracks (FLAC and TrueHD) now pass through as 7.1 using Q10 Pro Media Center and switching between tracks with the remote.