[mythtv-users] AAC 5.1 over optical?

Yianni Vidalis yiannividalis at hotmail.com
Wed Aug 19 06:15:12 UTC 2009


Well, I did transcode with handbrake both a small clip of the film and the whole film, and the results were the same and not that good:

 

The movie seems to play in slow motion and the sound is at very low frequency, "deep", if you know what I mean. Both the AC3 and DTS leds on the my creative amplifier are off, (I guess they would be) and I didn't check to see if anythig comes out of the rear speakers due to lack of time.

 

The bright side is that with this speed, you can really appreciate the action scenes, or have the time to paint the house while watching a film (two coats). Each film will propably finish by the time the sequel is out, so the waiting time is practically zero!

 

Seriously, I will try to test different sound settings for the transcode (I chose Discreet 6 channels - I will try Dolby Prologic II next time) but until then, the results don't look (or sound) promising. I guess the reply you got from Jean-Yves Avenard about the receiver is correct, but the speed of my output film is irrelevant, because it is the same on my other frontend, too, (2 speaker setup).

 

I'll let you know again after more tests.

 

Yianni.
 
> Subject: RE: [mythtv-users] AAC 5.1 over optical?
> From: sonofzev at iinet.net.au
> To: yiannividalis at hotmail.com
> Date: Tue, 18 Aug 2009 19:08:33 +1000
> 
> Awesome thankyou
> 
> On Tue, 2009-08-18 at 10:24 +0300, Yianni Vidalis wrote:
> > Thank you for the clarification.
> > 
> > Unless you get a more straightforward answer, I will transcode with
> > handbrake a movie to AAC sound, try it and get back to you tomorrow
> > (or late tonight.)
> > 
> > Yianni.
> > 
> > > From: sonofzev at iinet.net.au
> > > To: sonofzev at iinet.net.au; yiannividalis at hotmail.com
> > > Subject: RE: [mythtv-users] AAC 5.1 over optical?
> > > Date: Tue, 18 Aug 2009 15:17:24 +0800
> > > 
> > > Yep they are different. 
> > > 
> > > I don't have a problem with AC3 audio through optical.. I am only
> > wondering about
> > > AAC (Apple Audio Codec)
> > > 
> > > 
> > > On Tue Aug 18 17:10 , Yianni Vidalis sent:
> > > 
> > > >I am afraid I don't know the specific difference between AAC and
> > AC3, or if they
> > > are the same thing with different names. All I know is that my main
> > debian mythtv
> > > frontend is sending 5.1 AC3 to my Creative Digital (5700 if I
> > remember correctly)
> > > sound system through optical cable since I upgraded the frontend
> > (the previous
> > > M/b had coaxial S/PDIF).
> > > >
> > > > 
> > > >
> > > >Regards,
> > > >
> > > > 
> > > >
> > > >Yianni.
> > > > 
> > > >> From: sonofzev at iinet.net.au
> > > >> To: mythtv-users at mythtv.org
> > > >> Date: Tue, 18 Aug 2009 14:23:40 +0800
> > > >> Subject: [mythtv-users] AAC 5.1 over optical?
> > > >> 
> > > >> Hi All 
> > > >> 
> > > >> I've started to use mythnuv2mkv as a script to transcode my
> > files. 
> > > >> The limitation it has is that it can't just keep the ac3 audio
> > instead of
> > > >> compressing to another format. 
> > > >> 
> > > >> I have found out that in future it may encode to 6 channel (5.1)
> > AAC although I
> > > >> have read in many places that this can't be transmitted over
> > optical. 
> > > >> 
> > > >> Can 5.1 AAC be transmitted over optical s/pdif in mythtv (maybe
> > stream as ac3 or
> > > >> 6 channel mp3?)? Or do I have to look for another transocding
> > solution if I want
> > > >> to keep 5.1 audio? 
> > > >> 
> > > >> cheers
> > > >> 
> > > >> Allan 
> > > >> _______________________________________________
> > > >> mythtv-users mailing list
> > > >> mythtv-users at mythtv.org
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> > > >
> > > 
> > 
> > 
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