[mythtv-users] Freezing/Pixelating

Gabriel Kuri gkuri at ieee.org
Tue Mar 22 18:25:15 UTC 2016


Everything (HDHomerun Prime, backend, frontends) is connected to a gigabit
switch, and at the time there's been freezing/pixelation, there's been no
large file transfers. Additionally, when it's happened, there's only been
one recording/stream from the HDHomerun, it's not like we had that many
recordings going on either. The database is sitting on a separate SSD drive
from the recordings as well, so performance there is exceptional.

That's why I have a hard time believing it's the drive/disks, but before I
go looking at the HD Homerun Prime, I want to make sure it's not something
else. The errors I posted above are somewhat ambiguous, I'm not sure what
they mean, whether it's complaining about not receiving data from the
HDHomeRun Prime or an issue specific to the backend. The other thing is
that it's somewhat random. We could be recording 3 different shows and
watching one on a frontend, and everything is perfect. Then when it
happens, we may be only watching one show (Live) and it happens, which
makes me think the HDHomerun or Charter cable feed has an issue at the time
it's happening; if that's the case, I'm not sure how I'm going to narrow
down the problem.

Thanks ...

On Tue, Mar 22, 2016 at 11:03 AM, Hika van den Hoven <hikavdh at gmail.com>
wrote:

> Hoi Gabriel,
>
> Tuesday, March 22, 2016, 12:45:06 AM, you wrote:
>
> > While watching TV, the video on the remote frontend sometimes
> > freezes or pixelates. This last time, I had to exit back to the main
> > menu and go back in to the channel to continue watching because it
> > just froze for way too long. Later, I looked at the logs on the
> > backend and noticed this in the log about the same time it froze ...
>
>
> > 2016-03-20 21:23:51.714882 E [1237/15792] ProcessRequest
> > ringbuffer.cpp:1476 (ReadPriv) -
> > RingBuf(/export/record/1711_20160321035209.mpg): ReadPriv(..524288,
> > normal) -- timed out waiting for data (10011 ms)
>
>
> > I have an HD Homerun Prime w/ Cablecard as my tuner and the Cable
> company is Charter.
>
> > Does that error indicate the backend stopped receiving data from
> > the HD Homerun Prime or the backend was unable to read from the file
> > and stream it to the remote frontend, for 10011ms ?
>
>
> > Other times I've had the video pixelate and lose about 2 or so
> > seconds of video, and it'll go right back to playback with the
> > following message in my logs as well:
>
> > 2016-03-19 00:03:43.343580 W [2257/31376] ProcessRequest
> > ringbuffer.cpp:1453 (ReadPriv) -
> > RingBuf(/export/record/1704_20160319070218.mpg): ReadPriv(..524288,
> > normal) -- waited 5726 ms for avail(65424) > count(524288)
>
>
> > The video is on a RAID 5 array that is healthy and the SMART status
> > of all 4 drives is good. So I don't believe I have a failing drive.
>
>
> > I'm thinking an issue with the stream from the HDHomeRun Prime, but
> > not really sure what those errors mean.
>
>
>
> > Any help would be appreciated, thanks ...
>
>
> It   means  you  have  a  bottleneck somewhere. Most probable are disk
> (as  said),  network  (eg  an  incidental large file transfer or using
> wifi,  I  use  a  dedicated 1Gb connection for my homerun) or database
> (have you optimized it for mythtv?).
>
> Tot mails,
>   Hika                            mailto:hikavdh at gmail.com
>
> "Zonder hoop kun je niet leven
> Zonder leven is er geen hoop
> Het eeuwige dilemma
> Zeker als je hoop moet vernietigen om te kunnen overleven!"
>
> De lerende Mens
>
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