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

ajp at cantabrian.co.nz ajp at cantabrian.co.nz
Wed Jan 2 18:39:30 UTC 2019

-----Original Message-----
From: mythtv-users <mythtv-users-bounces at mythtv.org> On Behalf Of Don Brett
Sent: Thursday, 3 January 2019 4:50 AM
To: Discussion about MythTV <mythtv-users at mythtv.org>
Subject: Re: [mythtv-users] HD Hiomerun works better in HDHomeRun viewer than MythTV

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.

Bit of an off the wall suggestion

I had a lot of problem with pixilation just could not get to the bottom of it. And it did seem to work when you connected to the HDHR and was driving me potty

I found if I run the HDHR on a different and notably completely independent LAN with no internet access or access to my normal lan the problem disappeared. I still do this today - so adding another NIC to your backend. I would start with the HDHR on say a different switch/router as it needs DHCP and definitely without internet access.

I really don't know what is going on, if it calls home in some way or whatever. But for me it worked.

Just an idea :-) 

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