The VideoLAN Forums

Hey folks
seems that 8-channel AAC audio doesn´t work in any VLC version. Just switching between scratching and muting.
Example MediaInfo reports:

Audio #2
ID : 3
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : A_AAC
Duration : 2 h 9 min
Bit rate : 413 kb/s
Channel(s) : 8 channels
Channel positions : Front: L C R, Side: 4, LFE
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 spf)
Compression mode : Lossy
Delay relative to video : 20 ms
Stream size : 382 MiB (10%)
Language : English
Default : No
Forced : No

---

Audio #1
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : A_AAC
Duration : 2 h 16 min
Bit rate : 419 kb/s
Channel(s) : 8 channels
Channel positions : Front: L C R, Side: L R, Back: L R, LFE
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 spf)
Compression mode : Lossy
Delay relative to video : 20 ms
Stream size : 409 MiB (14%)
Language : English
Default : Yes
Forced : No

Any idea please?

thanks!!

Please share the file.

Hi
thanks for replying, here you go:
https://uloz.to/!XtJkz8wV31Dv/sample-aac-8ch-mka

Issues occur randomly, scratching and muting isn´t everytime in the same time of playing.
Happy to give you anything more, just ask.
One thing I tried was also Audio channel remapper (I have got only 2.1 speakers) but it also didn´t help.

thank you

It seems to play fine for me on a stereo system with VLC 3.0.0 nightly build.

Can you post a sample of this one please ?

Audio #2
ID : 3
Format : AAC
Channel(s) : 8 channels
Channel positions : Front: L C R, Side: 4, LFE
Sampling rate : 48.0 kHz

Side: 4 is something unusual.

Just tried the latest 3.0.0 nightly and it works perfectly with that sample I sent you, thanks!
Before 3.0.0 I used 2.2.x

But that "Side: 4" is still corrupted, here you got with the sample: https://uloz.to/!en8HouG76Krm/sample-8ch-aac-side4-mka

But that "Side: 4" is still corrupted, here you got with the sample: https://uloz.to/!en8HouG76Krm/sample-8ch-aac-side4-mka

Yes, I can reproduce the issue.
And it's playing fine with any other player I've tried including FFplay.

You should create a new ticket on the VLC Trac with the links to your file and to this thread.

Thank you again, reported under https://trac.videolan.org/vlc/ticket/18719#ticket

Usual FAAD channels mapping issue

I use MPC for this. Because vlc 3 nb crashes everytime I played a MKV with 8 acc Audio channel . You can download MPC together with K-Light Codec pack.

I use MPC for this. Because vlc 3 nb crashes everytime I played a MKV with 8 acc Audio channel . You can download MPC together with K-Light Codec pack.

Non videolan provided version ? (Linux build or..) which means unpatched faad.

Otherwise provide sample if you want it to be fixed.