[mythtv-users] Stutter playback 720 60fps

[Kevin Johnson]

Here is a link to what I have.
It is hard to see but the bottom scroll is jerky, and the av sync is -3.
Once I hit pause, playback is smooth and the av sync is under 1

https://goo.gl/photos/WQAV755sWhw29YSD8

Seems I am the only one with this issue.  I will wait a few days to see if
anyone has any suggestions.
After that I will try a purge and re install.

On Mon, Nov 14, 2016 at 9:52 PM, Kevin Johnson <iitywygms at gmail.com> wrote:

>
>
> On Mon, Nov 14, 2016 at 4:05 PM, Kevin Johnson <iitywygms at gmail.com>
> wrote:
>
>>
>>
>> On Mon, Nov 14, 2016 at 3:58 PM, Kevin Johnson <iitywygms at gmail.com>
>> wrote:
>>
>>>
>>>
>>> On Mon, Nov 14, 2016 at 2:53 PM, Kevin Johnson <iitywygms at gmail.com>
>>> wrote:
>>>
>>>> On Nov 14, 2016 1:19 PM, "Peter Bennett" <cats22 at comcast.net> wrote:
>>>> >
>>>> > On 11/14/2016 03:59 PM, Kevin Johnson wrote:
>>>> > > I have tried all the tuners.  (HDHR PRIME)  Does not matter which
>>>> > > tuner I use.
>>>> > >
>>>> > > I dont think its a hardware issue since I never see this issue while
>>>> > > using Kodi for playback.
>>>> > > This happens on two different frontends using different hardware.
>>>> > > Albeit they do both use nvidia.  But I have tried slim, as well as
>>>> > > vappi and other configurations.  Nothing changes the result.
>>>> > > I would point at the backend or hardware if this occurred on Kodi.
>>>> > > But it does not.
>>>> > > I usually find solutions by searching and searching.  But it seems I
>>>> > > am the only one with this issue.
>>>> > > Pressing pause for a split second clears everything up.  So I can
>>>> live
>>>> > > with it. It just bums me that .27 worked awesome, but since the
>>>> > > upgrade to .28 its been a bug chasing extravaganza.
>>>> > >
>>>> > > Its probably not possible, but can I use .27 frontend with a .28
>>>> > > backend?  Most likely not but it would be good for testing.
>>>> > >
>>>> > Sorry you cannot use a 0.27 frontend with 0.28.
>>>> >
>>>> > Note that it is normal for a few seconds of stopping and starting with
>>>> > live TV as the frontend can start ahead of where the backend is. That
>>>> > would normally clear up after a few seconds, or if you pause for a
>>>> > couple of seconds. If you just leave it running for a few minutes does
>>>> > the stuttering continue unabated? If it does it surely gets behind. If
>>>> > you press I do you see it getting further behind with time?
>>>> >
>>>> > If you are not getting further behind I wonder if you are getting it
>>>> > into time-stretch mode, speeded up. If you did that it should reset
>>>> time
>>>> > stretch as soon as it catches up with the current time, but maybe that
>>>> > is not happening correctly.
>>>> >
>>>> > Peter
>>>>
>>>> It continues until I do something. I let it go for 2 mins the other day
>>>> just to see.  From the playback info window. It is constantly right around
>>>> -3 behind. It never changes. I see from -v playback info that frames are
>>>> being dropped to catch up. But it never catches up. Just continuous dropped
>>>> frames.
>>>>
>>>
>>> After further investigation, I think this delay may be happening on
>>> 1080i framerate also.  Its just not as obvious.  But looking at the
>>> playbackdata while watching live tv, I see the the A/V Sync is always
>>> around -3 when starting.  Once I hit pause, the sync is around .01
>>> so the a/v sync is not "correct" at startup of live tv.   After hitting
>>> pause, the 'lips match the sound' sort to speak.
>>> Not sure if that is relevant or not.
>>>
>>> Just some more info.  In the playback info screen.  When the live tv
>> image is stuttering, Available Buffer is 0% of 16mb.  Once I hit pause that
>> never goes below 2% even if I try to fast forward to the "closest to live
>> moment" if that makes any sense.
>>
>
> The frontend is now showing this message in the logs.  Many times.  Did
> not see them before.
>
> Nov 14 21:48:19 g430 mythfrontend.real: mythfrontend[1757]: W Decoder
> avformatdecoder.cpp:4899 (GetFrame) AFD: Audio 3373 ms behind video but
> already 220 video frames queued. AV-Sync might be broken.
>
>
>> > _______________________________________________
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>>>>
>>>
>>>
>>
>
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