[Bug 719785] hlssink: does not always adhere to the segment target duration

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=719785

--- Comment #16 from Nicolas Dufresne (stormer) <nicolas at ndufresne.ca> ---
I have just re-read something you said:

(In reply to minfrin from comment #12)
> It's the equivalent of "[src] ! [timing-element] ! decodebin ! encodebin !
> hlssink".
> 
> The timing element sends downstream force-key-unit events, which are
> intercepted by h264parse, which then delays the force-key-unit, ruining the
> timing.

That's unreliable by choice. Most sources don't know what to do with keyframe
request. The keyframe request is only handled by video encoders in GStreamer. I
think this thread can be closed quickly here, just configure your encoder key
frame distance. E.g. x264enc has key-int-max property. If you configure this
(depends on which exact encoder you are using), you'll never notice this lack
of robustness again. Remember, this is an upstream request, so timing-element
cannot reach to your downstream encoder.

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