[MPlayer-users] HD mpeg transport stream native decoder regression.

Andy Furniss adf.lists at gmail.com
Fri Jan 16 01:47:44 CET 2015

Andy Furniss wrote:
> This is a crap report as I haven't had time to do anything yet but
> I'll mention it anyway.
> UK HD TV transport streams have a playback issue, I suspect due to
> recent changes, but trying to rest to say r37331 gets a build fail.
> verbose output would be very long with mplayers ts logging.
> Symptoms - the timing is wrong = slow motion but not 100%
> consistently slow.
> Issue does not happen with -demuxer lavf or h/w decode.

It turned out this is an ffmpeg regression not demuxer (though ffplay
doesn't show it).

The behavior above only applied to multithread decode, with single
thread the slow mo went away and both native and lavf demuxers showed
different symptoms = some out of order fields.

bisecting ffmpeg came up with -

fe439c20698fc4992b9373cb068efb438fe1a098 is the first bad commit
commit fe439c20698fc4992b9373cb068efb438fe1a098
Author: Michael Niedermayer <michaelni at gmx.at>
Date:   Mon Dec 22 21:17:49 2014 +0100

     avcodec/h264: also show frames with missing fields when 

     This allows viewing more of ticket2254

     Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

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