[mythtv-users] HD Hiomerun works better in HDHomeRun viewer than MythTV

James Abernathy jfabernathy at gmail.com
Wed Jan 2 22:48:43 UTC 2019

On 1/2/19 5:36 PM, R. G. Newbury wrote:
> On 2018-12-31 03:07 PM, Don Brett wrote:
>> On 12/31/2018 2:50 PM, James Abernathy wrote:
>>> On 12/31/18 2:36 PM, Don Brett wrote:
>>>> On 12/30/2018 9:36 PM, Stephen Worthington wrote:
>>>>> On Sun, 30 Dec 2018 15:32:07 -0500, you wrote:
>>>>>> On 12/30/2018 2:40 PM, Don Brett wrote:
>>>>>>> I have a roof mounted antenna and my house is within 3-5 miles 
>>>>>>> of all
>>>>>>> the local channels.  Signal strengths are very good. Shows are 
>>>>>>> always
>>>>>>> pixelated in MythTV, some worse than others, but it happens on 
>>>>>>> pretty
>>>>>>> much every show.   On a whim, I tried the HDHomeRun viewer, 
>>>>>>> which is
>>>>>>> supplied by Silicon Dust, everything looks perfect. Is there a 
>>>>>>> mythtv
>>>>>>> update or setting I should be looking at?  Any suggestions on 
>>>>>>> how to
>>>>>>> diagnose?
>>>>>>> Don
>>>>> Is it a recording problem or a playback problem?  Find one of the
>>>>> recordings that gives pixellation in MythTV and use the I key to show
>>>>> the "Recorded File", then find that file in your storage groups.  
>>>>> Then
>>>>> use other player software to play the file (eg VLC, mplayer). If
>>>>> possible, use the HDHomerun software to play the file.  Is it
>>>>> pixellated when played by other software?
>>>>> What version of MythTV are you running?  What is your video hardware?
>>>>> What drivers are you using?  What settings are you using for playback
>>>>> in mythfrontend?  What sort of recordings are you making - are they
>>>>> MPEG2 video, H.264, ...?  Are these DVB-T, ATSC, or something else?
>>>>> When the pixellation happens, do you also get audio blips around the
>>>>> same time?  Is the pixellation just occasional, or frequent? Is it
>>>>> regular (eg every 15 seconds)?  Does it vary in how long it lasts for
>>>>> before normal picture is restored?
>>>>> _______________________________________________
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>>>> HDHomeRun doesn't allow playback unless I buy their DVR license, so 
>>>> I can't try it that way. 
>>> The HDHR view that you download from their site will work for OTA 
>>> channels without cost. You only pay if you sign up for their DVR or 
>>> Premium service
>> Yes, that's where I started, using the  HDHR viewer to see live OTA 
>> channels.  It looks great in their viewer, but not in MythTv.  As a 
>> test, I was trying to playback a MythTV recorded show (from file) in 
>> the HDHR viewer, but can't without the license.
> Since you are using a roof mounted antenna and are VERY close, I would 
> suspect that you might be over-loading the receiver section of the 
> HDHR. I haave a large antenna and I am over 30 miles from some of the 
> transmitters and it works well. So the sensitivity is high!
> You might try an attenuator, or just a couple of splitters in a chain, 
> to chop down the signal.
> Geoff
There are a lot of us HDHR users that are having pixelation problems 
with specify station that we have good signal on.  SiliconDust has 
identified an issue with the new Quatro/Duo devices that has problems 
with some station signal and their demodulators. In that case atteuation 
the signal didn't have as it's not an overloading issue. They sent me 
test firmware and it collected more data for them and they are looking 
at some firmware changes.  I have only 1 station with 3 channels with 
this problem. If it works on a HDHR Connect but not on a Quatro/Duo then 
you have the same problem.  Get on the SiliconDust forum and mention it. 
there is a thread. I also submitted a report to SD directly.  The issue 
is around the country at certain stations.  It's not all VHF or UHF. 
It's not being too close to the antenna though.

jim A

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