[mythtv] 2019-devel: lipsync drift

[John Pilkington]

On 26/11/2019 10:49, Mark Kendall wrote:
> John
> 
> Is that the correct link? It's an android log...:)

Sorry:

https://drive.google.com/open?id=1-DFDeRMEfxq5wzY8mIjOMat2Og56b1nF
> 
> On Tue, 26 Nov 2019 at 10:44, John Pilkington <johnpilk222 at gmail.com> wrote:
>>
>> On 26/11/2019 08:56, Mark Kendall wrote:
>>> John
>>>
>>> Apologies for the delay - I've been away with the fairies for a few days:)
>>>
>>> Can you please post full logs for the working and non-working cases?
>>> The snippets are useful but I need the 101 other pointers that the
>>> logs might give.
>>>
>>> Given the nature of the problem, I'd suggest with  '-v playback,gpu
>>> --loglevel=debug' logging.
>>>
>>> If you want to go 'hardcore' as well  then add timestamp and audio
>>> options - though the logs will be fairly lengthy:)
>>>
>>> thanks and regards
>>> Mark
>>>
>>> On Mon, 25 Nov 2019 at 23:57, John Pilkington <johnpilk222 at gmail.com> wrote:
>>>>
>>>> On 24/11/2019 22:41, John Pilkington wrote:
>>>>> To continue...
>>>>>
>>>>> I have a 'new' F30 box, i3 4-core with nVidia and a single VGA-driven
>>>>> monitor, again running c794391ad. The only recordings at present are
>>>>> from assorted iptv channels, but they show no obvious a/v drift.
>>>>>
>>>>> The DispRes: Desktop video mode on frontend startup and the DispRes:
>>>>> SwitchToGUI on exit are both clean 1920x1080 60.000 Hz
>>>>
>>>> I commented earlier on the size of the timing StdDev shown in the
>>>> terminal log when the Playback Data OSD is active.  It was around 25 ms,
>>>> with a frame interval of 40 ms.  The SD appears to track the correction
>>>> increment set for AVSync2, which suggests that a correction is being
>>>> applied on every frame.  I had 30 ms, and now have 2 ms.  There is still
>>>> a drift, though.
>>>>>
>>>>> John
>>
>> The recording has been through my usual demux by Project-x and remux by
>> mplex process, which has delivered good sync over seveal years.  It has
>> speech to camera and shows the problem.
>>
>> AVSync2 2 ms, Standard decode, 2 cpus, OpenGL, HQ deinterlace, no ticks
>>
>> mythfrontend -v playback,gpu --loglevel=debug | tee lipsync.log
>>
>> see above for the right link 
>>
>> HTH