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Topic: [BeLight: AC3 5.1 -> HE-AAC 5.1] One audio channel is missing! (Read 11083 times) previous topic - next topic
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[BeLight: AC3 5.1 -> HE-AAC 5.1] One audio channel is missing!

Hi everybody,


I've a problem for encoding from AC3 5.1 to HE-AAC 5.1 ...
Everything seems to be working... but one audio channel is missing!
I can't hear the sound in HE-AAC for the rear left speaker! 
I use BeLight 0.2.2.0 beta9 + BeSweet 1.5b31.

My BeLight config :
http://tadd.free.fr/temp/stayOnline/beligh...ight-config.jpg
My dll for aac :
http://tadd.free.fr/temp/stayOnline/beligh...ght-aac-dll.zip
My AC3 sample : (note : wait until 15sec... more 3D effets!)
http://tadd.free.fr/temp/extraits/I_say_L-R-C-LFE-SL-SR.ac3
The generated he-aac :
http://tadd.free.fr/temp/extraits/I_say_L-...SL-SR_wrong.mp4

Any idea?? 


Thank you in advance! 
a+

[BeLight: AC3 5.1 -> HE-AAC 5.1] One audio channel is missing!

Reply #1 –
Please, update your package to the last build or here for the complete installer. Nero dlls have been dropped and replaced by the command line tool...

[BeLight: AC3 5.1 -> HE-AAC 5.1] One audio channel is missing!

Reply #2 –
Hi kurtnoise, thank you for answering!

Quote from: kurtnoise on
Please, update your package to the last build or here for the complete installer.

But I've already the latest version... (BeLight 0.2.2.0 beta9)


Quote from: kurtnoise on
Nero dlls have been dropped and replaced by the command line tool...

OK so what am I supposed to do with this?
NeroDigitalAudio.zip contains neroAacDec.exe, neroAacEnc.exe, neroAacEnc_SSE32.exe, neroAacTag.exe ...

[BeLight: AC3 5.1 -> HE-AAC 5.1] One audio channel is missing!

Reply #3 –
Quote from: TranceVibes on
But I've already the latest version... (BeLight 0.2.2.0 beta9)

The last one is the RC1 build (Release Candidate 1)...

Quote from: TranceVibes on
OK so what am I supposed to do with this?
NeroDigitalAudio.zip contains neroAacDec.exe, neroAacEnc.exe, neroAacEnc_SSE32.exe, neroAacTag.exe ...

NeroAAcEnc is the compressor...Just put it in the BeSweet directory.

[BeLight: AC3 5.1 -> HE-AAC 5.1] One audio channel is missing!

Reply #4 –
I just discovered that there is no missing channel,
but in fact the channels are misplaced!

(before) -> (after)
=====================
front left -> center
front right -> front left
center -> front right
LFE -> rear left
rear left -> rear right
rear right -> LFE


Quote from: kurtnoise on
The last one is the RC1 build (Release Candidate 1)...
NeroAAcEnc is the compressor...Just put it in the BeSweet directory.
OK I will try this tomorrow.

[BeLight: AC3 5.1 -> HE-AAC 5.1] One audio channel is missing!

Reply #5 –
Can you tell me if you hear the same thing as me please?

I say in this order :
-L = front left ("avant gauche" in French)
-R = front right (avant droite)
-C = center (milieu)
-LFE = bass (basse)
-SL = rear left (arrière gauche)
-SR = rear right (arrière droite)


AC3 5.1 works.
=> I_say_L-R-C-LFE-SL-SR.ac3
Ogg 5.1 works.
=> I_say_L-R-C-LFE-SL-SR.ogg
He-Aac 5.1 "works" but with a manipulation.
Instead of giving while encoding this order L-R-C-LFE-SL-SR, I give as input this order C-FL-FR-SL-SR-LFE...
=> I_say_L-R-C-LFE-SL-SR.mp4

Can you tell me if for the last one you here all the sounds in the right channel please?

[BeLight: AC3 5.1 -> HE-AAC 5.1] One audio channel is missing!

Reply #6 –
It's a decoding problem. Your AAC decoder outputs in the standard AAC order, it should convert that to MS ordering.

Try decoding it with neroAacDec.exe from the package and see if the output wav file still has incorrect order.

[BeLight: AC3 5.1 -> HE-AAC 5.1] One audio channel is missing!

Reply #7 –
Quote from: menno on
Try decoding it with neroAacDec.exe from the package and see if the output wav file still has incorrect order.

I tried :
Code: [Select]
D:\Programmes\Audio\BeSweet+BeLight_>
neroaacdec -if d:\temp\AC3\kirdee.mp4 -of d:\temp\AC3\kirdee_out.wav
But the following error is generated...
Code: [Select]
moov box not found
The paths are correct... 


Well, can you download the He-Aac sample just above and tell me if you here the channels in the right order please ?????????

[BeLight: AC3 5.1 -> HE-AAC 5.1] One audio channel is missing!

Reply #8 –
First of all it's an AAC file, not an MP4 file
I decoded it and it seems the channels are encoded in the wrong order. Probably the encoder used (FAAC I guess) requires input in AAC order instead of MS order. Blame the frontend

[BeLight: AC3 5.1 -> HE-AAC 5.1] One audio channel is missing!

Reply #9 –
Quote from: menno on
Blame the frontend

OK cool, thanks!
The problem is an incorrect channel order given in the mux file?
So if I'm correct, this order is false :
Code: [Select]
FL-FR-C-LFE-SL-SR
... and should be ...
Code: [Select]
C-FL-FR-SL-SR-LFE
 

[BeLight: AC3 5.1 -> HE-AAC 5.1] One audio channel is missing!

Reply #11 –
i do not use any frontends so i can not say exactly whats going wrong here.
what will work: use NeroAAcEnc.exe + latest bsn.dll + besweet.exe and make a bat file like

Code: [Select]
besweet.exe -core( -input "V:\AUDIO_TRACKS_TEST\I_say_L-R-C-LFE-SL-SR.ac3" -output "V:\AUDIO_TRACKS_TEST\AudioTrack001-de.mp4" -logfile "V:\AUDIO_TRACKS_TEST\BeSweetLog.txt" ) -ota( -norm 0.950 ) -azid( -c normal ) -bsn( -vbr 0.200 -aacprofile_he -6chnew )


the import thing is the -6chnew switch in the bsn section.
you should take a serious look on the code your favorite frontend generates!