[mythtv-users] Mythtv 0.24 Acer Revo ALSA WriteAudio buffer underruns

[Johnny Stenback]

On 02/09/2011 02:54 PM, Jean-Yves Avenard wrote:
> On 2 February 2011 22:40, Dave Sp<davespmyth at gmail.com>  wrote:
>
>> I was able to get rid of the "WriteAudio: buffer underrun" problem by
>> enabling "Extra audio buffering" under "Utilities/Setup -->  Setup -->  TV
>> Settings -->  Playback".  (It only happened while watching 720p HD, not
>> 1080p, which was interesting.)
>
> When using vdpau this isn't necessary as it's automatically enabled.
>
> Unfortunately, I think the problem is rather deep in 0.24 and later ;
> with the new threading architecture, there are cases where the audio
> framework isn't fed audio data fast enough and it starves the audio
> card leading to buffer underruns.
>
> This is usually happening at the start of playback, while the player
> is buffering video ; and then during playback if there is anything
> hogging the CPU for a short time.

I'm seeing this too, fairly consistently. If there's anything in 
particular that's worth looking into here? I'm willing to add logging or 
what not and spend time pouring over some data, if I know what I'm 
looking for...

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