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

John Pilkington johnpilk222 at gmail.com
Mon Dec 31 21:57:01 UTC 2018

On 31/12/2018 20:07, 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?

>>> 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.

It's my understanding that myth records and plays back the datastream 
from the tuner without attempting to correct anything out-of-spec.  VLC 
playback is probably the same.  Your story suggests that the HDHR player 
might be massaging a corrupt stream before display.  If your recordings 
are in mpeg2 format, mythtranscode (for example) might be worth a try.

John P

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