[mythtv] AVSync2 Improvements

Mark Spieth mark at digivation.com.au
Sat Mar 2 22:03:36 UTC 2019

On 3/3/2019 2:58 AM, Mark Kendall wrote:
> On Sat, Mar 2, 2019, 3:31 PM Peter Bennett <pb.mythtv at gmail.com 
> <mailto:pb.mythtv at gmail.com>> wrote:
>     > Stuttering occurs right at the start of the program with mediacodec
>     > decoder. SW dec is fine. Either avsync method exhibits this so its
>     > mediacodec related.
>     >
>     I am hoping that the direct render fixes it. Mark K said that he
>     will be
>     looking into direct render. Anyway I will download some of that
>     file and
>     see if I can do anything to understand what is happening,
> Has anyone tried increasing the number of mediacodec video buffers? 
> Its only 8 at the moment. I had similar problems with VideoToolBox 
> decoding this week and increasing the buffer count was the key. 8 
> gives you very little headroom for the simplest of system glitches.
> Direct render is getting there - only problem is it crashes as soon as 
> it tries to display anything:)

I have tried to find this but failed :-(. where is this 
constant/setting? I would like to try it as I suspect it fixes the 
timing issue we are currently seeing with mediacodec.



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