[Bug 763711] splitmuxsink: deadlock when one streams doesn't have regular buffers

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=763711

Jan Schmidt <thaytan at noraisin.net> changed:

           What    |Removed                     |Added
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                 CC|                            |thaytan at noraisin.net

--- Comment #2 from Jan Schmidt <thaytan at noraisin.net> ---
(In reply to Xavier Claessens from comment #0)
> 
> Note that, even without splitmuxsink, if I understand correctly how
> GstCollectPads works, it means that muxing a matroska with few subtitles
> could result in huge memory usage, since it's going to queue video buffers
> until it gets a subtitle... Imagine a movie that has a long periods with
> nobody speaking...

Upstream elements are supposed to send GAP events on subtitle / sparse streams
so that downstream elements get timely position updates even when there are
large gaps in the data and avoid that problem.

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