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

[James Linder]

> On 1 Jan 2019, at 8:00 pm, mythtv-users-request at mythtv.org 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.

This sounds very remisicent of a problem I had

scan choose different transmitter sites each scan. Some fiddling (rescan) and delete the not-good channels
The trouble with saying “this black box” is better than “that one” is you don’t know what is being compared.

Bing! all pixellation gone

James