[mythtv-users] problem with aac 5.1 audio with .24

[Alan Anderson]

On Wednesday, January 19, 2011 03:10:42 am Anthony Hill wrote:
> Hey Readers,
> 
> I've got a problem playing movie files with aac 5.1 audio using the
> internal player. The sound is weird - distorted - maybe playing reeeally
> slow, or maybe just the subwolfer channel - certainly not in anyway
> legible.
> 
> The same files work fine using mplayer or vlc. (as long as the myth
> frontend is shutdown first. [if it isnt shutdown, they either dont play,
> or play with no audio - a real bother cause I cant even configure myth
> to use an external player for the problem movies as a workaround])
> 
> I'm using HDMI to the telly, but the sound output is just to a PC style
> speaker/amplifier connected to the audio jack of my soundcard - works
> fine for other files, DTV etc.
> 
> Im running ubuntu 10.10 and myth .24 from the repositories, with one of
> the new AT5IONT-I atom itx motherboards which have just given me the
> ability to play HD - really loving that - unfortunately most of the HD
> movies I am coming across seem to also include these advanced audio
> tracks :(
> 
> The sound hardware (from lshw) is :-
> 
>   *-multimedia
>                 description: Audio device
>                 product: High Definition Audio Controller
>                 vendor: nVidia Corporation
>                 physical id: 0.1
>                 bus info: pci at 0000:03:00.1
>                 version: a1
>                 width: 32 bits
>                 clock: 33MHz
>                 capabilities: pm msi pciexpress bus_master cap_list
>                 configuration: driver=HDA Intel latency=0
>                 resources: irq:18 memory:fbcfc000-fbcfffff
> 
> 
> I dont know much about audio, and flailed around with some of the audio
> settings in myth - the current (default) settings seem to be about the
> only ones that work with anything, and none of them got the movies with
> AAC 5.1 sound to play right.
> 
> The current settings are :-
> 
> Audio output device: Alsa:default
> Speakers Config: stereo
> Mixer Device: Alsa:default
> Mixer Controls: Master
> 
> ..does this sound like a known problem ?
> 
> Any idea where I should look next ?
> 
> Failing that, any idea why external players dont work while myth
> frontend is running ? - would be very nice to use vlc or mplayer to work
> abound this and a few other minor issues.
> 
> Cheers.
> 

see if it fits the issue you are seeing:

http://www.gossamer-
threads.com/lists/mythtv/users/466592?do=post_view_threaded

For now I set the mythtranscode command in mythtvsetup to /bin/true so 
transcoding fails.  I'll live with really large files until this issue is 
resolved.



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