[mythtv-users] how do I stop prebuffing problems with audio

Paul mylists at wilsononline.id.au
Tue Sep 16 09:55:22 UTC 2008


On 13/09/2008 7:02 PM, Paul wrote:
> On 7/09/2008 4:30 PM, Paul wrote:
>> On 7/09/2008 8:49 AM, Paul wrote:
>>> I'm frequency seeing the following messages and getting audio 
>>> slightly out of sync with Video
>>>
>>> 2008-08-31 11:52:36.618 NVP::AddAudioData():p1: Audio buffer 
>>> overflow, audio data lost!
>>> 2008-08-31 13:01:11.653 NVP::AddAudioData():p1: Audio buffer 
>>> overflow, audio data lost!
>>> 2008-08-31 13:07:36.404 NVP: prebuffering pause
>>> 2008-08-31 13:15:46.553 NVP::AddAudioData():p1: Audio buffer 
>>> overflow, audio data lost!
>>>
>>>
>>> I'm using DVI-> HDMI output to a HDTV using HD1080i
>>> I'm running FC8 with Nvidia rpms using a VGA=NV 6200 GT and CPU=AMD 
>>> 3200+
>>>
>>> My CPU doesn't seem to to be a problem ie it sits around 30-50%
>>>
>>>
>>> Paul
>>>
>>>
>>>
>>
>> I have been seeing this problem as well, been struggling with it for
>> past few weeks. At first, I thought it was my motherboard chipset,
>> then I thought it was the sound card. Then I started looking at the
>> MythTV source code.
>>
>> Let me ask a question - do you see this error if you play an HD
>> recording from the beginning (not a bookmark) but without skipping
>> forward or backward?
>>
>> For my personal situation, I currently suspect the problem is due to
>> faulty firewire capture...
>>
>> ====
>>
>>
>> I capture from DVB-T and yes it tends to happen more often with HD 
>> programming but also
>> some SD recorded shows as well..
>> I was thinking of dropping down from HD1080 to HD720 output to see if 
>> that makes the problem go away.
>>
>> Paul
>>
>> PS  sorry about the format as I dont have the mailing output turned on 
>> so I have to reply this way..
>>
>> I would be good if this was a forum rather than mailing list.. far 
>> easier.
>>
>>
>>
> 
> a small update, I had  vncserver running on the mythTV userid which 
> seems to cause some performance problem, I shut down "vncserver" .
> Althought I'm see seeing heaps of these msgs when watching HD content
> 
> 2008-09-13 18:26:51.436 NVP: prebuffering pause
> 2008-09-13 18:26:51.463 NVP: prebuffering pause
> 2008-09-13 18:26:51.504 NVP: prebuffering pause
> 
> ...
> 
> Paul
> 

Note I will try setting prioity to "Realtime" to see if that helps

eg
http://www.cnpbagwell.com/MythTV/HomePage


Paul


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