Strange playbin2 gapless playback for a sequence mkv files with contiguous timestamps

[Paddy]

Hi.

I've a directory full of matroska files (containing just h264 video atm)
that I've recorded by changing the mux/filesink tail of the pipeline on the
fly (each is sent an EOS event on closing). Their timestamps are contiguous.

When I try & play these back using playbin2, the first file plays normally.
The about-to-finish handler triggers & the next file is cued up - however
when the next file plays only the last GOV is displayed & the
about-to-finish handler triggers again, & again, & again .... 
So only the last ~1.5sec of each subsequent video file is seen. 

The exception to this is the last file which appears to play as expected but
the logs show about half a dozen 
matroska-demux.c:5332:gst_matroska_demux_parse_contents_seekentry:<matroskademux7>
Too large SeekPosition 18446744073709551615 
&
matroskademux
matroska-demux.c:5352:gst_matroska_demux_parse_contents_seekentry:<matroskademux7>
Incomplete seekhead entry (0x1549a966/18446744073709551615)

which I think is due to the file not being closed properly.

I suspect that the timestamps in the matroska files are messing up playbin2. 

Does anyone know how I can achieve gapless playback of these files using
playbin2 ??

Cheers,

Paddy




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