[mythtv-users] Fwd: Pixelation/Bad Recordings HDHR Prime -- I am at my wits end

Thu Sep 12 02:46:48 UTC 2013

On Wed, Sep 11, 2013 at 10:16 PM, Captain Hook <captainhookzero at gmail.com>wrote:

>
>
>
> On Wed, Sep 11, 2013 at 2:57 PM, Captain Hook <captainhookzero at gmail.com>wrote:
>
>> On Tue, Sep 10, 2013 at 12:02 PM, Tom Lichti <tom at redpepperracing.com>
>> wrote:
>> > On Tue, Sep 10, 2013 at 11:00 AM, Joseph Fry <joe at thefrys.com> wrote:
>> >>
>> >> >> I have rewired everything again as I am not comfortable using an
>> >> >> amplifier
>> >> >> to amplify my signal, only to use multiple splitters to reduce it
>> back
>> >> >> down.
>> >> >> It doesn't seem to make sense.  Instead I have connected the Monster
>> >> >> cable
>> >> >> 4-way splitter (-7.5dBmV/output) to the cable coming in from Comcast
>> >> >> and
>> >> >> connected my HDHR Prime directly to one of the outputs.  Another
>> output
>> >> >> of
>> >> >> the Monster Cable splitter is connected to another splitter
>> >> >> (-3.5dBmV/output) which goes to my TVs.  Another output of the
>> Monster
>> >> >> Cable
>> >> >> splitter then goes to my existing long run to my cable modem.
>> >
>> >
>> > I don't know if it's relevant, but you only mention 3 feeds off of the
>> > splitter, is the other output terminated properly? Or did you mean a
>> four
>> > outlet splitter, one in and 3 out? And are all outputs on the second
>> > splitter also terminated properly?
>> >
>> > _______________________________________________
>> > mythtv-users mailing list
>> > mythtv-users at mythtv.org
>> > http://www.mythtv.org/mailman/listinfo/mythtv-users
>> >
>>
>> Regarding interference, I am seeing this on what seems like every
>> single channel at least some of the time, so I don't think that it is
>> interference, unless I am seeing interference on everything on the
>> HDHR Prime and this isn't affecting my cable modem or either Comcast
>> set top box (including one which is a DVR).
>>
>> My mistake on the wiring; I probably confused myself I rewired it so
>> many times.  I just looked at it and I have the following:
>>
>> Comcast signal in to MoCA filter to a two output splitter.  One end
>> goes to my HDHR Prime, the other end goes to another two output
>> splitter.  This two output splitter is then connected to my cable
>> modem and then the other end goes into yet another two output splitter
>> that goes to my two televisions.  So between my HDHR Prime and the
>> Comcast "feed", I only have one splitter.  Yet on my TVs, I have three
>> splitters in front of them and no issues; and my cable modem has two
>> splitters in front of it and no issues.
>>
>
> I believe I have narrowed this down to an issue with my hardware, or my
> MythTV setup and have been wasting my time chasing signal issues.  I have a
> thread on Silicon Dust's site (much is duplicated here, but here is the
> link if you are bored:
> http://www.silicondust.com/forum2/viewtopic.php?f=44&t=15543) and a
> member of their team was assisting me.  It appears that the HDHR Prime is
> getting perfect signal, and the video in both my desktop (Windows MCE) and
> VLC (HDHR GUI in Linux on my frontend) are pristine with zero audio
> dropouts or video pixelation when watched simultaneously.
>
> Now I am not sure where to go from here. In looking at the performance
> data in vSphere, I am not seeing anything that may cause this. This is a
> pretty decent machine, i5 3570K (overclocked to 4 ghz, though I don't know
> that ESXi is respecting this), 16GB of RAM. I have 4 CPU cores and 12GB of
> RAM provisioned to the Myth Backend server and I am not doing anything else
> with it, so I can't imagine it is a performance issue with anything other
> than the storage, which is all in the same box and carved up as VMDKs by
> ESXi.
>
> I have a few routes I can go here; first, I could use a separate spindle
> for just my recordings (right now it is being shared with a Windows Server
> data share that sees fairly little i/o). Second, I could pop in a 60gb SSD
> I have laying around and write some recordings to that to see if it makes a
> difference.
>
> Any suggestions?  I really don't want to build another box and turn it
> into a NAS, though that's probably my best bet...  I have enough money sunk
> into this at this point.
>

I just found this in my Myth backend log

Sep 11 21:55:44 MythTV mythbackend: mythbackend[2621]: E HDHRStreamHandler
threadedfilewriter.cpp:228 (Write)
TFW(/media/Recordings/LiveTV/1221_20130912015237.mpg:85): Maximum buffer
size exceeded.
#012#011#011#011file will be truncated, no further writing will be
done.#012#011#011#011This generally indicates your disk performance
#012#011#011#011is insufficient to deal with the number of on-
going #012#011#011#011recordings, or you have a disk failure.

I am also seeing a ton of these:

Sep 11 21:56:41 MythTV mythbackend: mythbackend[2621]: I ProcessRequest
ringbuffer.cpp:1098 (WaitForAvail)
RingBuf(/media/Recordings/LiveTV/1221_20130912015632.mpg): Waited 0.2
seconds for data #01
2#011#011#011to become available... 0 < 458752
Sep 11 21:56:43 MythTV mythbackend: mythbackend[2621]: I ProcessRequest
ringbuffer.cpp:1098 (WaitForAvail)
RingBuf(/media/Recordings/LiveTV/1221_20130912015632.mpg): Waited 0.2
seconds for data #01
2#011#011#011to become available... 185976 < 458752
Sep 11 21:56:45 MythTV mythbackend: mythbackend[2621]: I ProcessRequest
ringbuffer.cpp:1098 (WaitForAvail)
RingBuf(/media/Recordings/LiveTV/1221_20130912015632.mpg): Waited 0.2
seconds for data #01
2#011#011#011to become available... 131072 < 458752
Sep 11 21:56:46 MythTV mythbackend: mythbackend[2621]: I ProcessRequest
ringbuffer.cpp:1098 (WaitForAvail)
RingBuf(/media/Recordings/LiveTV/1221_20130912015632.mpg): Waited 0.2
seconds for data #01
2#011#011#011to become available... 131072 < 458752
Sep 11 21:56:51 MythTV mythbackend: mythbackend[2621]: I ProcessRequest
ringbuffer.cpp:1098 (WaitForAvail)
RingBuf(/media/Recordings/LiveTV/1221_20130912015632.mpg): Waited 0.2
seconds for data #01
2#011#011#011to become available... 294912 < 458752
Sep 11 21:56:52  mythbackend: last message repeated 2 times
Sep 11 21:56:52 MythTV mythbackend: mythbackend[2621]: I ProcessRequest
ringbuffer.cpp:1098 (WaitForAvail)
RingBuf(/media/Recordings/LiveTV/1221_20130912015632.mpg): Waited 0.2
seconds for data #01
2#011#011#011to become available... 360448 < 425984
Sep 11 21:56:53 MythTV mythbackend: mythbackend[2621]: I ProcessRequest
ringbuffer.cpp:1098 (WaitForAvail)
RingBuf(/media/Recordings/LiveTV/1221_20130912015632.mpg): Waited 0.2
seconds for data #01
2#011#011#011to become available... 65536 < 425984
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