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Convert AAC surround to PCM on the fly

Posted: 29 Nov 2017 19:00
by stokestack
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.

Re: Convert AAC surround to PCM on the fly

Posted: 04 Dec 2017 14:59
by Jean-Baptiste Kempf
VLC will always play AAC as PCM. I don't understand your issue. Also please try VLC 3.0

Re: Convert AAC surround to PCM on the fly

Posted: 21 Feb 2018 01:15
by ChicoCanada
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

Re: Convert AAC surround to PCM on the fly

Posted: 21 Feb 2018 14:38
by InTheWings
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.

Re: Convert AAC surround to PCM on the fly

Posted: 21 Feb 2018 15:56
by ChicoCanada
The HW expects PCM of 5 channels. VLC is not playing AAC as PCM.

Re: Convert AAC surround to PCM on the fly

Posted: 21 Feb 2018 18:02
by InTheWings
VLC has no AAC passthrough, so it never sends AAC to hardware. Only PCM in that case.

Don't use SPDIF