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

Don Brett dlbrett at zoominternet.net
Fri Jan 25 17:17:48 UTC 2019


On 1/24/2019 6:58 PM, Peter Bennett wrote:
>
>
> On 1/24/19 6:52 PM, Jay Foster wrote:
>> On 1/24/2019 3:46 PM, Don Brett wrote:
>>> On 1/3/2019 1:42 PM, Gary Buhrmaster wrote:
>>>> On Thu, Jan 3, 2019 at 2:39 PM Don Brett <dlbrett at zoominternet.net> 
>>>> wrote:
>>>>
>>>>> Thanks Gary; network questions and dropped packets seem to be the
>>>>> consensus so far.  I tried the network test from the Silicon Dust
>>>>> thread; it worked perfectly, with zero errors.  I assume
>>>>> hdhomerun_config is using TCP.
>>>> Nope, hdhomerun_config uses UDP, just like MythTV.
>>>>
>>>> But it is *critcal* to run the test on the same system
>>>> as the MythTV BE.  There are many issues with some
>>>> system(s) and their hardware and/or drivers and/or
>>>> configuration of the IP stack that can be a contributing
>>>> factor.
>>>>
>>> Not sure why this test didn't work before, but it does now.  I 
>>> verified the pixelation was happening in myth, then ran the test on 
>>> that same RF channel, directly on the be/fe box, for 104 minutes. 
>>> Results are:
>>>
>>> don at nick:~$ hdhomerun_config FFFFFFFF set /tuner0/channel auto:36
>>> don at nick:~$ hdhomerun_config FFFFFFFF save /tuner0 null
>>> .........several row of dots..........
>>>
>>> -- Video statistics --
>>> 11,480,828 packets received, 0 overflow errors, 0 network errors, 0 
>>> transport errors, 0 sequence errors.
>>>
>>> It looks like the test received over 11 million packets, with no 
>>> errors.  I'm not sure what this means....same hardware, same OS, 
>>> same TCP stack...what's next?
>>>
>>> PS - Transmitter info is below; I've noticed that TV channel 21 is 
>>> less bad than 27 and 33.  I located my attenuator.  I'll install it 
>>> and see what happens.
>>>
>>> The local channels are 21, 27, and 33
>>> Distance    Heading    RF channel    TV channel
>>> 4 mi            351 deg        auto:20        21.1
>>> 4 mi            351 deg        auto:20        21.2
>>> 2 mi            353 deg        auto:36        27.1
>>> 2 mi            353 deg        auto:36        27.2
>>> 2 mi            353 deg        auto:36        33.1
>>> 2 mi            353 deg        auto:36        33.2
>>>
>>>
>>>
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>> Are you using software decode or hardware decode (VDPAU, VAAPI) in 
>> MythTV?  Note the decode option can be configured differently from 
>> the rendering option (also software or hardware (VDPAU, VAAPI)).
>>
> There is a bug with VDPAU rendering. Certain channels in the USA are 
> using MPEG2 in a way that overloads VDPAU and causes pixellation every 
> few seconds. This is nothing to do with HDHomerun, it happens with any 
> type of equipment. The solution is to change to software decode and 
> OpenGL Rendering for mpeg2 streams. If you are not using VDPAU ignore 
> this email.
> Peter
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Sounds like we might be on-to something here, but I'm a bit confused on 
the selections.

Mythfrontend > Setup > Video > Playback (3/8):
-Current video playback profile = VDPAU Hight Quality
-if rez > 0 0 -> vdpau & vdpau

, then click on vdpau & vdpau "Edit" button

Match criteria: >
Match criteria: blank field
Decoder: Nvidia VDPAU acceleration
Video renderer: vdpau
OSD renderer: vdpau
Primary deinterlacer: None
Fallback deinterlacer: None
Custom filters: vdpaucolorspace=auto

Video renderer and OSD renderer only offers vdpau, unless I change the 
Decoder.  The decoder offers:
-Standard
-Nvidia VDPAU acceleration
-VAAPI Acceleration
-crystalHD

, then renderer options follow the selected decoder.  Any suggestions on 
what to pick?

BTW:
Video hardware = GK208 [GeForce GT 730]
Nvidia driver version = 390.87



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