Convert AAC surround to PCM on the fly

Feature requests for VLC.
stokestack
Blank Cone
Blank Cone
Posts: 10
Joined: 07 Oct 2008 14:13

Convert AAC surround to PCM on the fly

Postby stokestack » 29 Nov 2017 19:00

Hi all.

I'm encountering a growing number of ignorantly encoded video files, in that their audio has been converted from AC-3 to AAC.

Not surprisingly, A/V receivers do not play the audio from these files correctly; the center audio channel is missing. In fact, I'm curious as to why I'm even hearing the left & right channels.

I don't see any way to get VLC to send audio as PCM regardless of its source format. Given the increasing scale of the problem I'm reporting, it seems to me that this would be an increasingly important feature.

Or am I missing some other way to fix this? Thanks.

Jean-Baptiste Kempf
Site Administrator
Site Administrator
Posts: 37523
Joined: 22 Jul 2005 15:29
VLC version: 4.0.0-git
Operating System: Linux, Windows, Mac
Location: Cone, France
Contact:

Re: Convert AAC surround to PCM on the fly

Postby Jean-Baptiste Kempf » 04 Dec 2017 14:59

VLC will always play AAC as PCM. I don't understand your issue. Also please try VLC 3.0
Jean-Baptiste Kempf
http://www.jbkempf.com/ - http://www.jbkempf.com/blog/category/Videolan
VLC media player developer, VideoLAN President and Sites administrator
If you want an answer to your question, just be specific and precise. Don't use Private Messages.

ChicoCanada
New Cone
New Cone
Posts: 2
Joined: 21 Feb 2018 01:11

Re: Convert AAC surround to PCM on the fly

Postby ChicoCanada » 21 Feb 2018 01:15

I have the same problem.

The video has an audio stream of MPEG AAC (mp4a) with 5 channels at 48000 Hz. I will not pass it as 5 channels PCM to my audio amplifier with VLC v3 but it does work fine with Kodi.

Cheers

User avatar
InTheWings
Developer
Developer
Posts: 1275
Joined: 07 Aug 2013 13:15
VLC version: crashing
Operating System: Linux
Contact:

Re: Convert AAC surround to PCM on the fly

Postby InTheWings » 21 Feb 2018 14:38

No idea what you're trying to do.

AAC passthrough ? What does the hw expects.

In all cases, we have no conversion to AC3 yet.
:!: If you want your problem to be solved :
* First read troubleshooting guide VSG:Main
* Always provide verbose LOGS ! (command line or from gui)
* Always check your issue against a developer build from Nightly Build of VLC
* Tell us when your problem is solved !

ChicoCanada
New Cone
New Cone
Posts: 2
Joined: 21 Feb 2018 01:11

Re: Convert AAC surround to PCM on the fly

Postby ChicoCanada » 21 Feb 2018 15:56

The HW expects PCM of 5 channels. VLC is not playing AAC as PCM.

User avatar
InTheWings
Developer
Developer
Posts: 1275
Joined: 07 Aug 2013 13:15
VLC version: crashing
Operating System: Linux
Contact:

Re: Convert AAC surround to PCM on the fly

Postby InTheWings » 21 Feb 2018 18:02

VLC has no AAC passthrough, so it never sends AAC to hardware. Only PCM in that case.

Don't use SPDIF
:!: If you want your problem to be solved :
* First read troubleshooting guide VSG:Main
* Always provide verbose LOGS ! (command line or from gui)
* Always check your issue against a developer build from Nightly Build of VLC
* Tell us when your problem is solved !


Return to “VLC media player Feature Requests”

Who is online

Users browsing this forum: No registered users and 8 guests