[mythtv-users] The strangest behaviour

[Paul Gardiner]

Phil Wild wrote:
> 2009/8/2 Michael T. Dean <mtdean at thirdcontact.com>:
>> On 08/01/2009 12:46 PM, Phil Wild wrote:
>>> 2009/8/1 Phil Bridges:
>>>
>>>> On Sat, Aug 1, 2009 at 10:40 AM, Phil Wild wrote:
>>>>
>>>>> I am trying to determine what has happened to my audio...
>>>>>
>>>>> Everything has been working fine for months, but now, all of a sudden,
>>>>> audio is playing up.
>>>>>
>>>>> Audio on standard definition transmission live TV and recordings are
>>>>> fine. Anything that is high definition does not work.
>>>>> Well, about 95% of the time there is nothing and then I get about a
>>>>> second of audio before nothing again.
>>>>>
>>>>> I am connected using SP-DIF between mythfrontend and hi-fi receiver.
>>>>>
>>>>> If I look at the optical cable, I can see the red light so it is
>>>>> transmitting.
>>>>>
>>>>>
>>>>> Has anyone seen this type of behaviour before?
>>>>>
>>>>> Anyone suggestions on how to further debug this would be great...
>>>> Do you have the "Extra Audio Buffering" turned on?  This same thing
>>>> recently happened to me.
>>> Yes I do,
>>>
>>> I just tried turning it off though and it has made no difference....
>>>
>> You /want/ it on.  You had it right before.
>>
>>> I have just ripped my system apart and switched to my original inbuilt
>>> hdmi video port and piped the audio through it. I get exactly the same
>>> result so the problem is not the actual SP-DIF port. I guess it could
>>> be my motherboard...
>>>
>>> Any other suggestions?
>> I'll bet you recently enabled AC-3 passthrough.  Either configure it or
>> disable it (and DTS passthrough).
>>
>> Mike
> 
> 
> Hi Mike,
> 
> I had all this working before...
> 
> I have now turned extra audio buffering back on as it was not related
> to my issue. I have had AC3 working fine for a long time.
> 
> My current settings are both ac3 and dts to spdif enabled. My audio
> output device is ALSA:default and passthrough output device is
> Default. Max audio chanels is set to stereo.
> 
> It has me stumped...
> 
> Playing video in VLC player plays audio fine....

I had all that working and then lost audio in the ac3 pass-through case.
It turned out to be because I enabled "Use video as time
base (experimental)".

Cheers,
	Paul.