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

Don Brett dlbrett at zoominternet.net
Wed Jan 2 15:50:17 UTC 2019

On 12/31/2018 4:57 PM, John Pilkington wrote:
> 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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Yes, that's what I was wondering, maybe the HDHR viewer has something 
that does fix-ups on bad packets; or, maybe just drops them under some 
set of rules.  I posted a question on the SiliconDust forum, maybe they 
will come up with something.


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