[Bug 647769] [decodebin2] Fix preroll for streams at low bitrate

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=647769
  GStreamer | gst-plugins-base | git

--- Comment #15 from Vincent Penquerc'h <vincent.penquerch at collabora.co.uk> 2011-11-08 15:04:20 UTC ---
It works with the test case above.
There are two demuxers in that case, yes, hlsdemux, and mpegtsdemux.
Since the test is done again after adding a new demuxer, the last call should
be done on the most downstream demuxer, which seems right.

So it seems the seekability checks fails with hlsdemux, which makes that sample
work, but if seekability worked in hlsdemux, but failed in mpegtsdemux instead,
then the sample would not work, if I read your comment right ?

Best thing would probably be to reconfigure the multiqueue after each attempt
to determine seekability, what do you think ? If you agree, I will change it
so. It should be the more robust way.

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