[mythtv-users] Problem Audio on Freeview HD BBC Channels

Duncan Brown mythtv at duncb.co.uk
Mon May 23 10:07:41 UTC 2011

On 23/05/2011 08:18, Roy Thompson wrote:
> On 15/05/2011 12:50, Glenn Callow wrote:
>>> I'm guessing the issue is in ffmpeg ; the AAC/LATM decoder in ffmpeg
>>> is very new...
>> That looks likely to me.  I've just tried running the same clip through mplayer, and get the same problem (and error message) that mythfrontend reports i.e.
>> [aac_latm @ 0xf13bc0]channel element 0.0 is not allocated
>> repeated over and over after the program transition.  ffmpeg can decode both types of audio - if you snip the posted clip down to the last 10MB it plays just fine.  It's not handling the transition between audio configurations though.
>> I'll open up a bug on the ffmpeg bug tracker.  Thanks everybody for pointing me in the right direction.
>> Glenn
> Just a note to say I am seeing the same issue on recordings from BBC HD
> freeview channel.
> I get "AFD Error: Unknown audio decoding error" in the logs.
> I thought clipping the recording after the switch to the main program
> from the ident would help
> but does not.

Looks like it may not just be Myth experiencing these issues:



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