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

[Bob Sully]

Jean-Yves Avenard wrote:
> On 13 May 2011 10:59, Bob Sully <rcs at malibyte.net> wrote:
>> 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
>
> This states that it is a stereo file...
>

Yeah, that's what the log says.  Myth's recorded program list says it's
5.1.  It should be 5.1, as it's a big-name new series on a premium
channel.  :-)

> Can you post a sample somewhere?

Certainly:  http://www.malibyte.net/misc/GoT-2604.mpg  (40MB)

Again, this file played fine in 5.1 before the update (whether Myth was
upmixing it or not, I'm not sure).


>> 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
>
> Well do what it says if you don't want to see that message !
>
> JY


I tried that.  No matter what I did, despite not getting any permission
error messages, no matter what I did, the contents of that file remain
"64".


>
> Ah, I see what went wrong...
>
> Trying to track another issue, I had made a change, which turned out
> to be wrong .. I didn't commit it in master, but did commit it to the
> backport branch.
>
> Pushing new packages soon.
>
> Sorry for that
> JY
>

No problem.  Thanks!


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