[mythtv-users] Pi3 Playback problems with 1080i MPEG2?

[Charles Bovy]

On Mon, Jun 6, 2016 at 2:26 AM, Tom Harris <thom.j.harris at gmail.com> wrote:

>
>
> On Sun, Jun 5, 2016 at 2:17 PM, Peter Bennett <cats22 at comcast.net> wrote:
>
>>
>> On Wed, Jun 1, 2016 at 8:39 AM, Tom Harris <thom.j.harris at gmail.com>
>> wrote:
>>
>>>
>>> On Mon, May 30, 2016 at 7:35 AM, Peter Bennett (cats22) <
>>> cats22 at comcast.net> wrote:
>>> >
>>> > On 05/29/2016 09:58 PM, Tom Harris wrote:
>>> > > I just set up a new Pi3 frontend on Raspbian Lenny + Peter’s .deb
>>> > > package for 0.27.
>>> > > After some tweaking of various settings in raspbian and mythfrontend,
>>> > > it is working well.
>>> > >
>>> > > The one issue is that playback of 1080i content has problems.  It
>>> > > misses frames, pauses, and is generally not watchable.  720p video is
>>> > > fine.
>>> > >
>>> > > I verified a few things in debugging it:  content streams are fine,
>>> > > bandwidth to frontend is fine, settings are correct (as far as I can
>>> > > tell).   I played back the same videos just fine via Kodi’s mythtv
>>> > > add-on on my Pi2 as well as the Apple TV mythfrontend.
>>> > >
>>> > > ‘-v playback’ confirms openmax is enabled.   But, there is an error,
>>> > > which I’m not sure if it’s normal or a real problem: “E  AFD: Unknown
>>> > > decoding error"
>>> > >
>>> > > Has anyone else run into this?   Any more settings I should check?
>>> > >
>>> > Check your playback profile. You should have "Openmax normal" selected.
>>> > Also edit the profile and check that the decoder and renderer are both
>>> > set to openmax. Set the number of processors to 4.
>>>
>>> Yes, all of those settings are correct.   The other settings on those
>>> pages, I just left default:
>>>
>>> ‘Deblocking filter’ is selected
>>> ‘OSD fade’ is not selected
>>> ‘OSD renderer’ is soft blend
>>>
>>> Primary deinterlacer: Advanced (HW)
>>>
>>> Fallback deinterlacer: One field
>>>
>>>
>> Other things to check
>> - GPU memory, must be at least 128MB, but try 256MB to see if that helps
>>
>
> I’ve got it set to 256MB.  At that level, there is still free memory
> available and zero swap usage.
>
>
>> - Perhaps some other process is using CPU. Try running top from ssh while
>> playing back and see if anything other than mythfrontend is using lots of
>> CPU.
>>
>
> Mythfrontend is the only significant CPU user, and there is plenty of idle
> CPU.
>
>
>> - Is the mpeg2 license correctly installed?
>>
>
> Yes, confirmed via the command “vcgencmd codec_enabled MPG2” and also via
> playback in Kodi.
>
>
I can confirm this behavior with 1080i material.It isn't playing that
smoothly as 720 material.
I'll try to find more details/debug on this issue.

Regards,

Charles
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