Login at Kodi Home

Photographer · 2010-09-16, 11:33

Could somebody helping me to become clearer in ACC encoding?
Is Dharma beta2 play ACC in 5.1 channel. Am I not mistaken? I am pleasing surprised!
Do XMBC recode AAC to AC3 on the fly?

Thanks!

Baswazz · 2010-11-04, 19:04

Beta 4 doesn't, i checked with apple trailers my bose reviever does not handle AAC format and i don't hear any sound.

Flomaster · (This post was last modified: 2010-11-04, 19:23 by Flomaster.)

no I've been having a terrible time since beta3 with AAC audio I have yet to get it working.

see my thread here.
http://forum.xbmc.org/showthread.php?tid=84638

my amp does in fact hand aac and I'd like it to handle it I don't want xbmc doing anything with aac other than passing it directly to my amp.

I notice in the ~/.xbmc/userdata/guisettings.xml

Code:
<audiooutput>

        <ac3passthrough>true</ac3passthrough>

        <audiodevice>alsa:plug:hdmi</audiodevice>

        <channellayout>7</channellayout>

        <customdevice></customdevice>

        <custompassthrough></custompassthrough>

        <dontnormalizelevels>true</dontnormalizelevels>

        <dtspassthrough>true</dtspassthrough>

        <mode>2</mode>

        <passthroughaac>false</passthroughaac>

        <passthroughdevice>alsa:hdmi</passthroughdevice>

        <passthroughmp1>false</passthroughmp1>

        <passthroughmp2>false</passthroughmp2>

        <passthroughmp3>false</passthroughmp3>

    </audiooutput>

I do believe xbmc should be taking aac and converting it to AC3 but for me I only get surround sound I do not get a center channel.

-=Jason=-

Baswazz · 2010-11-04, 20:16

Thats really strange. I don't understand that there isnt a fix for it. I dont think we are the only ones.

Hannes The Hun · 2010-11-04, 21:55

at the moment XBMC (or alsa or ffmpeg or whatever it takes...) is only capable of doing either an unaltered digital passthrough to a receiver who can hopefully decode multichannel AAC or do a PCM stereo downmix, not a real surround transcode. I know that there's some filters available for windows which are able to exactly do this on the fly, but I have no idea if there's something like this available for linux.

my best guess might be the probable answer from the devs: if you want it, code it by yourself Wink

p.s. at the moment I feel that some people in the forums start to get pissed as if they paid a license fee for their XBMC instead of memorizing that the devs are doing the hard work as a hobby besides their normal daytime jobs, and that a lot of functionality is actually dependent on completely different linux/ubuntu project groups and just not in the hands of the dev team. get real and calm down, guys.

Baswazz · (This post was last modified: 2010-11-05, 00:17 by Baswazz.)

Hannes The Hun Wrote:I know that there's some filters available for windows which are able to exactly do this on the fly, but I have no idea if there's something like this available for linux.

I read something about plex maybey that...
Before XBMC i used WDTV Live with custom firmware. I know there is a kind of program called Auto framerate/resolution.
There is an option to dowmix AAC to stereo. It;s linux based to.
http://forum.wdlxtv.com/viewtopic.php?f=40&t=897

P.Kosunen · 2010-11-05, 14:54

Hannes The Hun Wrote:I know that there's some filters available for windows which are able to exactly do this on the fly, but I have no idea if there's something like this available for linux.

Yes, mplayer can do it (and i thought XBMC do it also, maybe i remember wrong).

**spiff** · 2010-11-05, 14:55

guys, don't spread FUD. yes, xbmc transcodes multichan aac/whatever to ac3.

Hannes The Hun · 2010-11-05, 17:10

damn, really? could anybody give me a (legal!) DL link to a media file that actually has multichannel AAC inside? last time I checked (some QT trailers) XBMC always did a stereo downmix but maybe I have something mighty wrong here (was a long week after all...)

a931048 · 2010-11-05, 17:37

Hannes The Hun Wrote:damn, really? could anybody give me a (legal!) DL link to a media file that actually has multichannel AAC inside? last time I checked (some QT trailers) XBMC always did a stereo downmix but maybe I have something mighty wrong here (was a long week after all...)

http://forum.xbmc.org/showpost.php?p=635...stcount=16

Flomaster · 2010-11-05, 18:13

a931048 Wrote:http://forum.xbmc.org/showpost.php?p=635...stcount=16

what custom option of you speak of?

can you post your .asoundrc or /etc.asound.conf file so I may test it out.

using HDMI only I get surround sound no center channel.

-=Jason=-

a931048 · 2010-11-05, 19:28

Flomaster Wrote:what custom option of you speak of?

can you post your .asoundrc or /etc.asound.conf file so I may test it out.

using HDMI only I get surround sound no center channel.

-=Jason=-

I was talking about this (http://forum.xbmc.org/showpost.php?p=634934&postcount=7) except that I had hdmi in all setting instead of custom hw:0,3. Works for me with Beta 3.