[mythtv-users] New issue - stuttering audio on playback of certain recordings/videos

[Bob Sully]

Bob Sully wrote:
>
>> On 12 May 2011 10:05, Rod Smith <mythtv at rodsbooks.com> wrote:
>>
>>> I've got the same problem. It goes away if I uncheck the option to
>>> upconvert stereo to 5.1 audio. FWIW, that's been a bit dodgey for me
>>> since upgrading to 0.24, anyhow -- it works fine for a few minutes, and
>>> then I get a brief audio glitch (a brief crackle, or transfer of sound
>>> from the front to rear speakers for a fraction of a second, or
>>> whatever). Then it works fine, followed by a brief glitch, and so on.
>>
>> We have identified the source of the occasional audio corruption ; I
>> will push that change ASAP.
>
>
> Thanks, Jean-Yves.  Much appreciated.  :-)


FYI -

Just installed your latest updates (425; 20110512).  No change.

Here's a snippet from the frontend log which might be pertinent.  This
file is said by the frontend menu to be AC-3, 5.1 format; it was recorded
from the HD-PVR with S/PDIF audio:

2011-05-12 17:52:02.925 AFD: Opened codec 0x7f56043b7cd0, id(H264)
type(Video)
2011-05-12 17:52:02.925 AFD: codec AC3 has 2 channels
2011-05-12 17:52:02.926 AFD: Opened codec 0x7f56043ce570, id(AC3) type(Audio)
2011-05-12 17:52:02.928 AO: Opening audio device 'iec958:CARD=Intel,DEV=0'
ch 2(2) sr 48000 sf signed 16 bit reenc 1
2011-05-12 17:52:02.929 ALSA, Error: Setting hardware audio buffer size to
128
2011-05-12 17:52:02.929 ALSA, Error: Error opening
/proc/asound/card0/pcm1p/sub0/prealloc: Permission denied.
2011-05-12 17:52:02.929 ALSA, Error: Try to manually increase audio buffer
with: echo 128 | sudo tee /proc/asound/card0/pcm1p/sub0/prealloc
2011-05-12 17:52:02.929 ALSA, Error: Unable to sufficiently increase ALSA
hardware buffer size - underruns are likely

Hope this helps - Bob

-- 
________________________________________
Bob Sully - Simi Valley, California, USA
http://www.malibyte.net
http://www.malibyte.com