[mythtv] firestick 4k lock up with interlaced playback

John Pilkington johnpilk222 at gmail.com
Tue Dec 18 20:22:03 UTC 2018

On 18/12/2018 15:29, David Engel wrote:
> On Tue, Dec 18, 2018 at 09:56:40AM -0500, Peter Bennett wrote:
>> I have had a report of mediacodec playback locking up with interlaced h264
>> on a firestick 4k. I have been using the fire stick for a lot of playback of
>> progressive h264 without problems. It seems that interlaced content may be
>> what is causing the issue.
> FWIW, I let mine run for ~35 minutes on h.264/1080i this weekend as a
> test.  No issues found.  I can try to let it run longer this evening
> if it would help.
> David

Mine had an update on Friday, too.  With MediaCodec decoding it still 
reliably locks up at the end of the station ident on the recording (BBC 
FOUR HD, DVB-T2, Feb 2016) from which I took the clip posted earlier. 
After what seems a long time it quits  with 'Video frame buffering 
failed too many times.'

With standard decoding nothing seems wrong and the playback quality is 
excellent.  I have looked at adb log output in both cases but see 
nothing that seems unusual at the position where things lock up.


ISTR that mythtranscode used to have problems when subsidiary streams 
would suddenly start up or close.  That could perhaps be what is 
happening here.  In the sample I posted there was no obvious event in 
the main streams that coincided with the failure, but it was close to 
the end of the programme. The one I mentioned above was at the start of 
the content.  Stream analyses around the fail points might be useful; at 
present I don't know the easiest way to do that and I can't record from 
the HD channels.

John P

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